Embodiments herein relate to 3D printing. In an embodiment, a method for printing an article using a selective toner electrophotographic process (“STEP”) includes successively depositing multiple layers of part material, the layers deposited substantially parallel to a first plane; wherein: a) the multiple areas of part material extend in a perpendicular to the first plane; and b) at least some of the areas of part material are separated from each other to form a gap between the layers of part material; application of heat and pressure to the part material such that a portion of the part material flows into and at least partially fills the gap within the part material.
B29C 64/141 - Procédés de fabrication additive n’utilisant que des matériaux solides
B29C 64/188 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur
B33Y 40/20 - Posttraitement, p. ex. durcissement, revêtement ou polissage
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
2.
ADDITIVE MANUFACTURING USING OVERLAY FIDUCIAL FEATURE TEMPLATE MATCHING
A system and method for printing a 3D part is disclosed. The method includes forming a material toner image on a transfer medium including a registration pattern comprising at least three features (the features combined to form a fiducial); transporting the material toner image on the transfer medium to a sensor such that the features may be detected by the sensor; storing a position measurement for each feature detected by the sensor; calculating a score for subsets of features with reference to a template; adjusting the relative position of the transfer medium and a build surface based on at least the positions of the selected features; and transferring the toner image from the transfer medium to the build surface.
The present disclosure is directed to a method for selective thermoplastic electrophotographic process additive manufacturing. In particular, this disclosure is directed to measuring the height of the build (the deposited part material and support material) against a reference (desired) height and making adjustments in subsequent deposited layers to correct any deficiencies in the build.
The present disclosure is directed to a support composition for additive manufacturing, the support composition comprising a soluble support polymer and a finely divided particulate, In certain embodiments the particulate is about 5% by weight to 25% by weight of the support composition. In certain embodiments the particulate is at or below 1 μm weight average particle size.
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
B29C 64/141 - Procédés de fabrication additive n’utilisant que des matériaux solides
The present disclosure is directed, in part, to method for selective thermoplastic electrophotographic process additive manufacturing, the method comprising applying a high-absorbance support material and a low-absorbance part material adjacent to one another: applying radiated energy to the high-absorbance support material and low-absorbance part material such that the high-absorbance support material selectively absorbs the radiated energy and transfers heat to the low-absorbance part material.
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
Embodiments herein relate to 3D printing. In an embodiment, a method for printing an article using a selective toner electrophotographic process (“STEP”) includes successively depositing multiple layers of part material and support material, the layers deposited substantially parallel to a first plane: wherein: a) the multiple layers of part material and support material extend in a perpendicular to the first plane; and b) at least some of the layers of part material and support material are separated from each other to form a gap between the layers of part material and layers of support material: application of heat and pressure to the part material and support material such that a portion of the part material and support material flows into and at least partially fills the gap between the part material and support material.
B29C 64/141 - Procédés de fabrication additive n’utilisant que des matériaux solides
B29C 64/188 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
Systems and methods for controlling the transfusion pressure in an additive manufacturing system are described. The system has a layer transfusion assembly that can include a build platform. The layer transfusion assembly is configured to transfuse the layers at a transfusion pressure in a layer-by-layer manner onto the build platform to print a three-dimensional part, and a controller is configured to set the transfusion pressure, wherein the transfusion pressure can vary along the x-direction of the build platform in a controlled manner.
An additive printing composition, the additive printing composition comprising a nylon toner and a magnetic carrier; wherein the magnetic carrier comprises less than 1.0 percent of a polymeric coating. Optionally the magnetic carrier is coated with less than 0.75% of a polymeric coating, less than 0.5% of a polymeric coating, or less than 0.3% of a polymeric coating.
B29C 64/106 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux
A method of producing a part using a selective toner electrophotographic process, the method comprising: providing a build surface; depositing layers of support material onto the build surface; building up a part by depositing layers of part material onto the support surface to reach a part top surface; and adding a plurality of layers of support material to the top of the part material above the part top surface.
B29C 64/106 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux
Methods and systems for additive manufacturing are disclosed, the methods and systems comprising reducing the amount of support material used, by one or more methods, including inclusion of part material voxels and air voxels within the support regions, using a lattice of part material within support regions, printing one or more skin layers and boundary layers to support the part geometry and surface, and printing support layers in a drafted manner to reduce support material.
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
B29C 64/223 - Feuilles ou films, p. ex. pour transférer le matériau de fabrication d’un poste de travail à un autre
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
11.
ADDITIVE MANUFACTURING SYSTEM AND METHOD WITH SMOOTH SURFACE
Embodiments herein relate to 3D printing. In an embodiment, a method for printing an article using a selective toner electrophotographic process ("STEP") includes successively depositing multiple layers of part material and support material, the layers deposited substantially parallel to a first plane; wherein: a) the multiple layers of part material and support material extend in a perpendicular to the first plane; and b) at least some of the layers of part material and support material are separated from each other to form a gap between the layers of part material and layers of support material; application of heat and pressure to the part material and support material such that a portion of the part material and support material flows into and at least partially fills the gap between the part material and support material.
B29C 64/30 - Opérations ou équipements auxiliaires
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
12.
ADDITIVE MANUFACTURING SUPPORT MATERIAL WITH PARTICULATES
The present disclosure is directed to a support composition for additive manufacturing, the support composition comprising a soluble support polymer and a finely divided particulate, In certain embodiments the particulate is about 5 % by weight to 25% by weight of the support composition. In certain embodiments the particulate is at or below 1 µm weight average particle size.
B29C 64/165 - Procédés de fabrication additive utilisant une combinaison de matériaux solides et liquides, p. ex. une poudre avec liaison sélective par liant liquide, catalyseur, inhibiteur ou absorbeur d’énergie
The present disclosure is directed to a method for selective thermoplastic electrophotographic process additive manufacturing. In particular, this disclosure is directed to measuring the height of the build (the deposited part material and support material) against a reference (desired) height and making adjustments in subsequent deposited layers to correct any deficiencies in the build.
The present disclosure is directed, in part, to method for selective thermoplastic electrophotographic process additive manufacturing, the method comprising applying a high- absorbance support material and a low-absorbance part material adjacent to one another; applying radiated energy to the high-absorbance support material and low-absorbance part material such that the high-absorbance support material selectively absorbs the radiated energy and transfers heat to the low-absorbance part material.
B29C 64/165 - Procédés de fabrication additive utilisant une combinaison de matériaux solides et liquides, p. ex. une poudre avec liaison sélective par liant liquide, catalyseur, inhibiteur ou absorbeur d’énergie
Systems and methods for controlling the transfusion pressure in an additive manufacturing system are described. The system has a layer transfusion assembly that can include a build platform. The layer transfusion assembly is configured to transfuse the layers at a transfusion pressure in a layer-by-layer manner onto the build platform to print a three-dimensional part, and a controller is configured to set the transfusion pressure, wherein the transfusion pressure can vary along the x-direction of the build platform in a controlled manner.
Embodiments herein relate to 3D printing. In an embodiment, a method for printing an article using a selective toner electrophotographic process ("STEP") includes successively depositing multiple layers of part material, the layers deposited substantially parallel to a first plane; wherein: a) the multiple areas of part material extend in a perpendicular to the first plane; and b) at least some of the areas of part material are separated from each other to form a gap between the layers of part material; application of heat and pressure to the part material such that a portion of the part material flows into and at least partially fills the gap within the part material.
A cooling assembly, and method, for an article being printed using a selective toner electrophotographic printing system is disclosed. The assembly includes a surface for delivering and returning cooling gas, the surface containing first plurality of elongate openings in communication with a cooling gas supply; and a second plurality elongate openings in communication with a cooling gas return; wherein the first plurality of elongate openings and second plurality of elongate openings are substantially parallel to one another and alternate with one another.
A part material for printing three-dimensional parts with a selective deposition-based additive manufacturing system has a composition having a thermoplastic elastomer (TPE) polymer and a surface modifier. The TPE polymer is polyether block amide (PEBA). The part material is provided in a powder form having a D90/D50 particle size distribution and a D50/D10 particle size distribution each ranging from about 1.00 to about 2.0, wherein the part material is configured for use in the selective deposition-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
C08G 69/40 - Polyamides contenant de l'oxygène sous forme de groupes éther
C08J 3/14 - Pulvérisation ou granulation par précipitation à partir de solutions
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
C08K 9/06 - Ingrédients traités par des substances organiques par des composés contenant du silicium
Disclosed are selective layer deposition based additive manufacturing systems and methods for printing a 3D part. Layers of a powder material are developed using one or more electrostatography-based engines. The layers are transferred for deposition on a part build surface. One or more lasers are used to heat a region of the part build surface and a developed layer near the nip roller entrance. The developed layer is then pressed into the part build surface.
B29C 64/268 - Agencements pour irradiation par faisceaux laserAgencements pour irradiation par faisceaux d’électrons [FE]
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
In a method of printing a 3D part in accordance with a selective deposition additive manufacturing process a first image portion of a flowable material is developed using a first electrophotographic engine. A second image portion of a resilient material is developed using a second electrophotographic engine. The first image portion is registered with respect to the second image portion to form a combined image layer comprising the first and second image portions on a transfer medium. The combined image layer is transfused from the transfer medium to a part build surface of a 3D part. The viscosity (Vr) of the resilient material is greater than or equal to three times the viscosity (Vf) of the flowable material, and/or the storage modulus (Er) of the resilient material is greater than or equal to three times the storage modulus (Ef) of the flowable material.
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
21.
Additive manufacturing system and method with improved surface finish
Embodiments herein relate to 3D printing. In an embodiment, a method for printing an article using a selective toner electrophotographic process (“STEP”) includes successively depositing multiple layers of part material and support material, the layers deposited substantially parallel to a first plane; wherein: a) the multiple layers of part material and support material extend in a perpendicular to the first plane; and b) at least some of the layers of part material and support material are separated from each other to form a gap between the layers of part material and layers of support material; application of heat and pressure to the part material and support material such that a portion of the part material and support material flows into and at least partially fills the gap between the part material and support material.
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
B29C 64/188 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur
G03G 15/20 - Appareils pour procédés électrographiques utilisant un dessin de charge pour le fixage, p. ex. par la chaleur
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/34 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes dans lesquels l'image de poudre est formée directement sur le matériau d'enregistrement
22.
Layer transfusion sequencing for selective deposition-based additive manufacturing
A method for making a three-dimensional (3D) part with an electrostatographic based additive manufacturing system includes establishing first and second control parameter profiles, establishing a transfusion sequence, and transfusing n+m layers on a bonding region of previously accumulated layers of the 3D part according to the transfusion sequence. The first and second control parameter profiles each include a different combination of temperature and pressure parameters usable to transfuse a single layer of the 3D part. The transfusion sequence specifies the use of each of the first and second control parameter profiles in a specified order. A total thickness of the n+m layers is less than a thermal diffusion depth. The transfusion step includes transfusing n layers according to the first control parameter profile, and, after transfusing then layers, transfusing m layers according to the second control parameter profile.
B29C 64/141 - Procédés de fabrication additive n’utilisant que des matériaux solides
B29C 64/176 - Procédés de fabrication additive spécialement adaptés à la fabrication d'objets multiples en 3D successivement
B29C 64/194 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur pendant l’empilage des couches
A selective deposition-based additive manufacturing system capable of building a three-dimensional (3D) part utilizing a semi-crystalline polymeric material includes at least one electrostatographic engine configured to develop one or more layers of particles of semi-crystalline polymeric material corresponding to one or more slices of a 3D model of a 3D part. The system includes a transfer medium configured to receive the one or more layers of particles of the semi-crystalline polymeric material on a front side from the at least one electrostatographic engine and to move the one or more layers away from the electrostatographic engine and a platen configured to carry the 3D part or support being printed. The system includes a gantry coupled to the platen and configured to move the platen into registration with the one or more layers, and a heater configured to heat a top surface of the 3D part being printed to a transfuse temperature. The system includes a layer transfer assembly having a roller contacting a back side of the transfer medium and a driver configured to cause the layer to transfer from the front side of the transfer medium to the heated top surface of the part. The system includes a cooler configured to cool the heated semi-crystalline polymeric material at a maximum rate of at least 20° C. per second such that the semi-crystalline material is in a super-cooled state wherein the semi-crystalline polymeric material does not completely initially crystallize.
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
An apparatus for use in a selective toner electrophotographic process (STEP) additive manufacturing system, the apparatus includes a radiant heat source configured to emit radiation of a first band of wavelengths in the region of a transfuse roller nip; and a pyrometer configured to receive and measure radiation emitted from the region of the transfuse roller nip; wherein the radiation measured by the pyrometer comprises a second band of wavelengths different from the first band of wavelengths emitted by the radiant heat source. The radiant heat source is typically one or more laser light emitters.
B29C 64/386 - Acquisition ou traitement de données pour la fabrication additive
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
B33Y 50/00 - Acquisition ou traitement de données pour la fabrication additive
B29C 64/268 - Agencements pour irradiation par faisceaux laserAgencements pour irradiation par faisceaux d’électrons [FE]
B29C 64/282 - Agencements pour irradiation utilisant des moyens de rayonnement multiples, p. ex. des micro-miroirs ou des diodes électroluminescentes multiples [LED] du même type, p. ex. utilisant des niveaux d’énergie différents
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
G03G 15/20 - Appareils pour procédés électrographiques utilisant un dessin de charge pour le fixage, p. ex. par la chaleur
25.
ADDITIVE MANUFACTURING METHODS USING REDUCED SUPPORT MATERIAL
Methods and systems for additive manufacturing are disclosed, the methods and systems comprising reducing the amount of support material used, by one or more methods, including inclusion of part material voxels and air voxels within the support regions, using a lattice of part material within support regions, printing one or more skin layers and boundary layers to support the part geometry and surface, and printing support layers in a drafted manner to reduce support material.
A cooling assembly, and method, for an article being printed using a selective toner electrophotographic printing system is disclosed. The assembly includes a surface for delivering and returning cooling gas, the surface containing first plurality of elongate openings in communication with a cooling gas supply; and a second plurality elongate openings in communication with a cooling gas return; wherein the first plurality of elongate openings and second plurality of elongate openings are substantially parallel to one another and alternate with one another.
G03G 21/20 - Commande de l'humidité ou de la température
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/20 - Appareil pour la fabrication additiveDétails ou accessoires à cet effet
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
27.
ADDITIVE MANUFACTURING SYSTEM AND METHOD WITH IMPROVED SURFACE FINISH
Embodiments herein relate to 3D printing. In an embodiment, a method for printing an article using a selective toner electrophotographic process ("STEP") includes successively depositing multiple layers of part material and support material, the layers deposited substantially parallel to a first plane; wherein: a) the multiple layers of part material and support material extend in a perpendicular to the first plane; and b) at least some of the layers of part material and support material are separated from each other to form a gap between the layers of part material and layers of support material; application of heat and pressure to the part material and support material such that a portion of the part material and support material flows into and at least partially fills the gap between the part material and support material.
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
In a method of printing a 3D part in accordance with a selective deposition additive manufacturing process a first image portion of a flowable material is developed using a first electrophotographic engine. A second image portion of a resilient material is developed using a second electrophotographic engine. The first image portion is registered with respect to the second image portion to form a combined image layer comprising the first and second image portions on a transfer medium. The combined image layer is transfused from the transfer medium to a part build surface of a 3D part. The viscosity (Vr) of the resilient material is greater than or equal to three times the viscosity (Vf) of the flowable material, and/or the storage modulus (Er) of the resilient material is greater than or equal to three times the storage modulus (Ef) of the flowable material.
B29C 64/124 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux utilisant des couches de liquide à solidification sélective
Disclosed are selective layer deposition based additive manufacturing systems and methods for printing a 3D part. Layers of a powder material are developed using one or more electrostatography-based engines. The layers are transferred for deposition on a part build surface. One or more lasers are used to heat a region of the part build surface and a developed layer near the nip roller entrance. The developed layer is then pressed into the part build surface.
B29C 64/135 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux utilisant des couches de liquide à solidification sélective caractérisés par la source d'énergie à cet effet, p. ex. par irradiation globale combinée avec un masque la source d’énergie étant concentrée, p. ex. lasers à balayage ou sources lumineuses focalisées
A part material for printing three-dimensional parts with a selective deposition-based additive manufacturing system has a composition having a thermoplastic elastomer (TPE) polymer and a surface modifier. The TPE polymer is polyether block amide (PEBA). The part material is provided in a powder form having a D90/D50 particle size distribution and a D50/D10 particle size distribution each ranging from about 1.00 to about 2.0, wherein the part material is configured for use in the selective deposition-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
C08L 77/00 - Compositions contenant des polyamides obtenus par des réactions créant une liaison amide carboxylique dans la chaîne principaleCompositions contenant des dérivés de tels polymères
A selective deposition-based additive manufacturing system capable of building a three-dimensional (3D) part utilizing a semi-crystalline polymeric material includes at least one electrostatographic engine configured to develop one or more layers of particles of semi-crystalline polymeric material corresponding to one or more slices of a 3D model of a 3D part. The system includes a transfer medium configured to receive the one or more layers of particles of the semi-crystalline polymeric material on a front side from the at least one electrostatographic engine and to move the one or more layers away from the electrostatographic engine and a platen configured to carry the 3D part or support being printed. The system includes a gantry coupled to the platen and configured to move the platen into registration with the one or more layers, and a heater configured to heat a top surface of the 3D part being printed to a transfuse temperature. The system includes a layer transfer assembly having a roller contacting a back side of the transfer medium and a driver configured to cause the layer to transfer from the front side of the transfer medium to the heated top surface of the part. The system includes a cooler configured to cool the heated semi-crystalline polymeric material at a maximum rate of at least 20ºC per second such that the semi-crystalline material is in a super-cooled state wherein the semi-crystalline polymeric material does not completely initially crystallize.
B29C 64/124 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux utilisant des couches de liquide à solidification sélective
B29C 64/223 - Feuilles ou films, p. ex. pour transférer le matériau de fabrication d’un poste de travail à un autre
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/176 - Procédés de fabrication additive spécialement adaptés à la fabrication d'objets multiples en 3D successivement
B29C 64/194 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur pendant l’empilage des couches
d). The layers (22) are transferred for deposition on a part build surface (88). For each of the layers (22), the part build surface (88) is pre-heated by impinging a first heat transfer liquid (74) toward the part build surface (88), for example using a solder fountain. The developed layer (22) is pressed into contact with the heated part build surface (88) to heat the developed layer (22) to a flowable state and form a new part build surface (88) which is fully consolidated. The new part build surface (88) is then rapidly cooled to remove the heat energy added during heating step before repeating the steps for the next developed layer (22).
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
Disclosed are selective deposition based additive manufacturing systems (10) and methods for printing a 3D part. Layers of a powder material (22) are developed using one or more electrostatography-based engines (12). The layers (22) are transferred for deposition on a part build surface. For each of the layers (22), the part build surface is heated to a temperature within a range between a flowable temperature and a thermal oxidation threshold to form a flowable part build surface, and the developed layer (22) is pressed into contact with the flowable build surface (88) to heat the developed layers (22) to a flowable state and form a new part build surface (88) which is fully consolidated. The new part build surface (88) is then cooled to remove the heat energy added during heating step before repeating the steps for the next developed layer.
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
35.
Building layers with unsupported portions through selective deposition-based additive manufacturing
A method of selective deposition-based additive manufacturing includes conveying a layer (28) of material to previously built layers (22) of material. A determination is made as to whether at least one of the conveyed layers (28) of material and a top previously built layer (22) of material contains an unsupported portion (302). When at least one of the conveyed layer (28) of material and the top previously built layer (22) of material contains an unsupported portion, a first set of steps (306, 408, 506) are used to transfer the conveyed layer (28) of material to the top previously built layer (22) of material. When neither of the conveyed layer (28) of material and the top previously built layer (22) of material contains an unsupported portion, a second set of steps (304, 406, 504) are used to transfer the conveyed layer (28) of material to the top previously built layer (22) of material.
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
A method of operating a selective deposition-based additive manufacturing system capable of building a three-dimensional (3D) part includes developing a first layer using at least one electrostatographic engine, conveying the first layer from the at least one EP engine to a transfusion assembly, determining an anticipated transfusion overlay error for the first layer, determining whether the anticipated transfusion overlay error exceeds an overlay error specification, discarding the first layer after determining that the anticipated transfusion overlay error exceeds the overlay error specification, developing a successive layer using the at least one electrostatographic engine, conveying the successive layer from the at least one electrostatographic engine to the transfusion assembly, and transfusing the successive layer on a part build surface using the transfusion assembly to build the 3D part in a layer-by-layer manner on a part build platform.
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
37.
ADDITIVE MANUFACTURING LASER HEATING AND TEMPERATURE MONITORING SYSTEM AND METHOD
An apparatus for use in a selective toner electrophotographic process (STEP) additive manufacturing system, the apparatus includes a radiant heat source configured to emit radiation of a first band of wavelengths in the region of a transfuse roller nip; and a pyrometer configured to receive and measure radiation emitted from the region of the transfuse roller nip; wherein the radiation measured by the pyrometer comprises a second band of wavelengths different from the first band of wavelengths emitted by the radiant heat source. The radiant heat source is typically one or more laser light emitters.
G03G 15/04 - Appareils pour procédés électrographiques utilisant un dessin de charge pour exposer, c.-à-d. pour projeter optiquement l'image originale sur un matériau d'enregistrement photoconducteur
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
B33Y 40/00 - Opérations ou équipements auxiliaires, p. ex. pour la manipulation de matériau
B33Y 50/00 - Acquisition ou traitement de données pour la fabrication additive
38.
Systems and methods for electrophotography-based additive manufacturing of parts utilizing multiple printing paths
An electrostatic-based layer-wise manufacturing system (e.g., 200; 200-1; 250; 282; 300) decouples a layer imaging process from a layer transfusion process. The layer imaging process is performed in a first batch process that is independent from the layer transfusion process that is performed in a second batch process.
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
B33Y 40/00 - Opérations ou équipements auxiliaires, p. ex. pour la manipulation de matériau
B29C 64/379 - Manutention des objets en 3D obtenus, p. ex. à l’aide de robots
39.
Thermal partitioning in an electrostatographic additive manufacturing system
A method for making a three-dimensional (3D) part with an electrostatographic based additive manufacturing system includes developing a first layer of a powder material using at least one electrostatographic engine, supporting the developed first layer on a transfer medium, adjusting a first layer thermal profile of the developed first layer with a first thermal flux device, adding thermal energy to a part thermal profile that includes a bonding region of previously accumulated layers of the 3D part, transfusing the developed first layer on the bonding region of the previously accumulated layers of the 3D part, and removing thermal energy from the part thermal profile. A transfusion temperature at a start of the transfusing step can be equal to or greater than a transfusion threshold temperature, where the transfusion temperature is an average of the first layer thermal profile and the part thermal profile in the bonding region.
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
40.
Transfuse roller tracking in selective layer deposition based additive manufacturing
A method of additive manufacturing utilizing selective layer deposition includes measuring a transfuse force between a transfuse roller and a part build surface. An angular position of the transfuse roller is measured over time. A component of a transfuse force variation that is periodic in a rotational period of the transfuse roller is estimated, and a vertical position between the transfuse roller and the part build surface is adjusted to reduce pressure variations in transfuse roller force on the build part surface.
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
41.
THERMAL PARTITIONING IN AN ELECTROSTATOGRAPHIC ADDITIVE MANUFACTURING SYSTEM
A method for making a three-dimensional (3D) part with an electrostatographic based additive manufacturing system includes developing a first layer of a powder material using at least one electrostatographic engine, supporting the developed first layer on a transfer medium, adjusting a first layer thermal profile of the developed first layer with a first thermal flux device, adding thermal energy to a part thermal profile that includes a bonding region of previously accumulated layers of the 3D part, transfusing the developed first layer on the bonding region of the previously accumulated layers of the 3D part, and removing thermal energy from the part thermal profile. A transfusion temperature at a start of the transfusing step can be equal to or greater than a transfusion threshold temperature, where the transfusion temperature is an average of the first layer thermal profile and the part thermal profile in the bonding region.
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
A method of additive manufacturing utilizing selective layer deposition includes measuring a transfuse force between a transfuse roller (120) and a part build surface. An angular position of the transfuse roller (120) is measured over time. A component of a transfuse force variation that is periodic in a rotational period of the transfuse roller (120) is estimated, and a vertical position between the transfuse roller (120) and the part build surface is adjusted to reduce pressure variations in transfuse roller force on the build part surface.
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
Disclosed are selective deposition-based additive manufacturing systems (10) and methods for printing a 3D part (26). Layers of a powder material (22) are developed using one or more electrostatographic engines (12a-d). The layers (22) are transferred for deposition on a part build surface (88). For each of the layers (22), the part build surface (88) is pre -heated by impinging a first heat transfer liquid (74) toward the part build surface (88), for example using a solder fountain. The developed layer (22) is pressed into contact with the heated part build surface (88) to heat the developed layer (22) to a flowable state and form a new part build surface (88) which is fully consolidated. The new part build surface (88) is then rapidly cooled to remove the heat energy added during heating step before repeating the steps for the next developed layer (22).
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
44.
SACRIFICIAL LAYERS IN SELECTIVE DEPOSITION-BASED ADDITIVE MANUFACTURING OF PARTS
A method of operating a selective deposition-based additive manufacturing system capable of building a three-dimensional (3D) part includes developing a first layer using at least one electrostatographic engine, conveying the first layer from the at least one EP engine to a transfusion assembly, determining an anticipated transfusion overlay error for the first layer, determining whether the anticipated transfusion overlay error exceeds an overlay error specification, discarding the first layer after determining that the anticipated transfusion overlay error exceeds the overlay error specification, developing a successive layer using the at least one electrostatographic engine, conveying the successive layer from the at least one electrostatographic engine to the transfusion assembly, and transfusing the successive layer on a part build surface using the transfusion assembly to build the 3D part in a layer-by-layer manner on a part build platform.
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
45.
BUILDING LAYERS WITH UNSUPPORTED PORTIONS THROUGH SELECTIVE DEPOSITION-BASED ADDITIVE MANUFACTURING
A method of selective deposition-based additive manufacturing includes conveying a layer (28) of material to previously built layers (22) of material. A determination is made as to whether at least one of the conveyed layers (28) of material and a top previously built layer (22) of material contains an unsupported portion (302). When at least one of the conveyed layer (28) of material and the top previously built layer (22) of material contains an unsupported portion, a first set of steps (306, 408, 506) are used to transfer the conveyed layer (28) of material to the top previously built layer (22) of material. When neither of the conveyed layer (28) of material and the top previously built layer (22) of material contains an unsupported portion, a second set of steps (304, 406, 504) are used to transfer the conveyed layer (28) of material to the top previously built layer (22) of material.
46.
METHOD OF THERMALLY TRANSFERRING IMAGES IN A SELECTIVE DEPOSITION BASED ADDITIVE MANUFACTURING SYSTEM
Disclosed are selective deposition based additive manufacturing systems (10) and methods for printing a 3D part. Layers of a powder material (22) are developed using one or more electrostatography-based engines (12). The layers (22) are transferred for deposition on a part build surface. For each of the layers (22), the part build surface is heated to a temperature within a range between a flowable temperature and a thermal oxidation threshold to form a flowable part build surface, and the developed layer (22) is pressed into contact with the flowable build surface (88) to heat the developed layers (22) to a flowable state and form a new part build surface (88) which is fully consolidated. The new part build surface (88) is then cooled to remove the heat energy added during heating step before repeating the steps for the next developed layer.
B22F 3/105 - Frittage seul en utilisant un courant électrique, un rayonnement laser ou un plasma
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
47.
Height control in selective deposition based additive manufacturing of parts
A method of operating a selective deposition based additive manufacturing system capable of producing a three-dimensional (3D) part includes developing a first layer using at least one electrostatography engine, transfusing the first layer on a part build surface using a transfusion assembly to build the 3D part in a layer-by-layer manner on a part build platform such that a portion of the first layer further builds a fiducial structure in a layer-by-layer manner on the part build platform, measuring a height of the fiducial structure, computing an error between the measured height of the fiducial structure and a target height, adjusting a parameter of the at least one electrostatography engine as a function of the error, developing a second layer using the at least one electrostatography engine in accordance with the adjusted parameter, and transfusing the second layer using the transfusion assembly to further build the 3D part.
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
A method of producing a 3D part using a selective deposition based additive manufacturing system can include developing a first layer using at least one electrostatography engine, determining a first cross-track offset distance between an average cross-track symmetry line of the first layer and a centerline of a transfer medium, transferring the first layer to the transfer medium such that the average cross-track symmetry line of the first layer is aligned with the centerline of the transfer medium, moving a build platform relative to the transfer medium in the cross-track direction to align the first layer on a part build surface, and transfusing the first layer on the build platform using a transfusion assembly to build the part in a layer-by-layer manner. The first layer comprises at least one of a part material and a support material. The first cross-track offset distance is measured in a cross-track direction perpendicular to an in-track direction of movement of the transfer medium.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
A selective-deposition-based additive manufacturing system (10) includes a transfer medium (24) configured to receive the layers (22) from an imaging engine (12), a heater (72) configured to heat the layers (22) on the transfer medium (24), and a layer transfusion assembly (20) that includes a build platform (28), and is configured to transfuse the heated layers (22) onto the build platform (28) in a layer-by-layer manner to print a three- dimensional part (22). The transfusion assembly (20) includes a nip roller (320) configured to deform when transfusing the heated imaged layers (22) to reduce deformation of the layers (22).
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
50.
THERMOPLASTIC POLYURETHANE MATERIAL FOR SELECTIVE DEPOSITION-BASED ADDITIVE MANUFACTURING AND METHOD OF MAKING SAME
A part material for printing three-dimensional parts with a selective deposition-based additive manufacturing system has a composition having a thennoplastic polyuiethane polymer and a charge control agent. The part material is provided in a powder form having a D90/D50 particle size distribution and a D50/D10 particle size distribution each ranging from about 1.00 to about 1.40, wherein the part material is configured for use in the selective deposition-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
B29C 64/223 - Feuilles ou films, p. ex. pour transférer le matériau de fabrication d’un poste de travail à un autre
G03G 9/08 - Développateurs avec des particules de toner
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
51.
SYSTEMS AND METHODS FOR ELECTROPHOTOGRAPHY-BASED ADDITIVE MANUFACTURING OF PARTS UTILIZING MULTIPLE PRINTING PATHS
An electrophotography-based additive manufacturing system (e.g., 10; 100; 200; 300; 350; 500; 700) having at least one electrophotography (EP) or electrostatographic engine (e.g., 12; 12p; 12s; 612p; 612p; 712-1; 712-2) and being configured such that a plurality of independently movable parts is built in parallel at a plurality of decoupled processing stations.
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/00 - Fabrication additive, c.-à-d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p. ex. par impression en 3D, stéréolithographie ou frittage laser sélectif
52.
SYSTEMS AND METHODS FOR ELECTROPHOTOGRAPHY-BASED ADDITIVE MANUFACTURING OF PARTS UTILIZING VARIABLE PRINTING PATHS
An electrostatic -based layer-wise manufacturing system (e.g., 200; 200-1; 250; 282; 300) decouples a layer imaging process from a layer transfusion process. The layer imaging process is performed in a first batch process that is independent from the layer transfusion process that is performed in a second batch process
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/00 - Fabrication additive, c.-à-d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p. ex. par impression en 3D, stéréolithographie ou frittage laser sélectif
53.
Layer transfusion for heat capacitor belt for additive manufacturing
An additive manufacturing system comprising a transfer medium configured to receive the layers from a imaging engine, a heater configured to heat the layers on the transfer medium, and a layer transfusion assembly that includes a build platform, and is configured to transfuse the heated layers onto the build platform in a layer-by-layer manner to print a three-dimensional part.
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/20 - Appareils pour procédés électrographiques utilisant un dessin de charge pour le fixage, p. ex. par la chaleur
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
G03G 15/24 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes au moyen desquels deux phases au moins sont accomplies simultanément
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
54.
Electrophotography-based additive manufacturing with support structure and support structure removal
A method of printing a part using an additive manufacturing system includes identifying a part or parts to print and orienting a digital representation of the part(s) in a build volume. A digital representation of porous support structures for the part(s) is generated to form a digital representation of a part block of the part(s) to be printed. In the part block, a porosity of the support structure increases as a distance from an outer surface of the part increases within the print volume. The digital representation of the part block, including the part(s) and porous support structures, is sliced for printing.
B29C 33/44 - Moules ou noyauxLeurs détails ou accessoires comportant des moyens ou conçus spécialement pour faciliter le démoulage d'objets, p. ex. des objets à contre-dépouille
B29C 33/52 - Moules ou noyauxLeurs détails ou accessoires comportant des moyens ou conçus spécialement pour faciliter le démoulage d'objets, p. ex. des objets à contre-dépouille solubles ou fusibles
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/106 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux
B29C 64/112 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux utilisant des gouttelettes individuelles, p. ex. de buses de jet
B29C 64/176 - Procédés de fabrication additive spécialement adaptés à la fabrication d'objets multiples en 3D successivement
B29C 64/171 - Procédés de fabrication additive spécialement adaptés à la fabrication d'objets multiples en 3D
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
B29C 64/386 - Acquisition ou traitement de données pour la fabrication additive
A method (200, 500) of printing a part (306) using an additive manufacturing system (10) includes identifying a part or parts (306) to print and orienting a digital representation of the part(s) (306)in a build volume. A digital representation of porous support structures (404) for the part(s) (306) is generated to form a digital representation of a part block (300) of the part(s) (306) to be printed. In the part block (300), a porosity of the support structure (404) increases as a distance from an outer surface of the part (306) increases within the print volume. The digital representation of the part block (300), including the part(s) (306)and porous support structures (404), is sliced for printing.
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B33Y 50/00 - Acquisition ou traitement de données pour la fabrication additive
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
A method for printing a three-dimensional part with an electrophotography-based additive manufacturing system having an electrophotography engine, a transfer medium, and a layer transfusion assembly includes providing a part material to the electrophotography-based additive manufacturing system, the part material compositionally comprising a charge control agent, and a thermoplastic material having a heat deflection temperature greater than about 150° C., and has a powder form. The method includes triboelectrically charging the part material to a Q/M ratio having a negative charge or a positive charge, and a magnitude ranging from about 5 micro-Coulombs/gram to about 50 micro-Coulombs/gram and developing layers of the three-dimensional part from the charged part material with the electrophotography engine. The method includes electrostatically attracting the developed layers from the electrophotography engine to the transfer medium and moving the attracted layers to the layer transfusion assembly with the transfer medium, wherein the layer transfusion assembly comprises a nip roller. The method includes transfusing the moved layers to previously-printed layers of the three-dimensional part with by moving the attracted layers about a nip of a nip roller using heat and pressure over time.
G03G 13/22 - Procédés impliquant la combinaison de plusieurs phases de traitement comprises dans les groupes
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
B33Y 70/00 - Matériaux spécialement adaptés à la fabrication additive
G03G 13/08 - Développement utilisant un développateur solide, p. ex. développateur en poudre
G03G 15/24 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes au moyen desquels deux phases au moins sont accomplies simultanément
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
B29K 71/00 - Utilisation de polyéthers comme matière de moulage
B29K 105/00 - Présentation, forme ou état de la matière moulée
B29K 81/00 - Utilisation de polymères contenant dans la chaîne principale uniquement du soufre avec ou sans azote, oxygène ou carbone comme matière de moulage
B29K 77/00 - Utilisation de polyamides, p. ex. polyesteramides, comme matière de moulage
58.
Additive manufacturing using density feedback control
A method for printing a three-dimensional part with an additive manufacturing system includes providing a bitslice stack having a plurality of bitslices and printing a plurality of successive layers of the three-dimensional part with the additive manufacturing system based on the bitslices in the bitslice stack. The method includes measuring density of the three-dimensional part under construction near an intermediate build surface after one or more of the successive layers are printed. The method includes determining differences across the intermediate build surface of the measured density to a targeted density to identify one or more density error regions across the intermediate build surface, wherein the density error regions comprise low density regions, and modifying the bitslice stack to compensate for the one or more density error regions.
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
An additive manufacturing method produces a 3D part utilizes electrophotography-based additive manufacturing and molding processes. A layered structure having a cavity is printed on a build platform using at least one electrophotographic (EP) engine to develop imaged layers of powder material, and a transfusion assembly to stack and fuse the imaged layers on the build platform. Molding material is deposited into the cavity as the layered structure is printed, using a deposition unit. The molding material solidifies to form at least a portion of the 3D part, which may also include portions formed from imaged powder material.
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
B29C 64/141 - Procédés de fabrication additive n’utilisant que des matériaux solides
B29C 70/74 - Moulage de matière sur une partie relativement petite de l'objet préformé, p. ex. moulage sur une pièce rapportée
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/188 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur
B29C 64/118 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux utilisant un matériau filamentaire mis en fusion, p. ex. modélisation par dépôt de fil en fusion [FDM]
B29C 64/147 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des matériaux stratifiés, p. ex. fabrication d’objets stratifiés ou matériau stratifié prédécoupé selon les sections en coupe de l’objet en 3D
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
B29C 64/20 - Appareil pour la fabrication additiveDétails ou accessoires à cet effet
B29C 64/268 - Agencements pour irradiation par faisceaux laserAgencements pour irradiation par faisceaux d’électrons [FE]
B29C 64/106 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux
A laser assembly for use with an additive manufacturing system, which includes a base block configured to be moved along a scan direction axis in the additive manufacturing system, a plurality of laser emitters preferably arranged in an array of at least two rows of two or more laser emitters. At least a portion of a heat sink assembly is configured to draw heat away from the base block and/or the laser emitters. The assembly includes a controller assembly a controller assembly configured to control a movement of the base block along the first axis and to independently control at least timing and duration of energy emitted from each laser emitter of the plurality of laser emitters as the base block moves along the first axis.
H01S 5/40 - Agencement de plusieurs lasers à semi-conducteurs, non prévu dans les groupes
H01S 5/02 - Détails ou composants structurels non essentiels au fonctionnement laser
B29C 64/135 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux utilisant des couches de liquide à solidification sélective caractérisés par la source d'énergie à cet effet, p. ex. par irradiation globale combinée avec un masque la source d’énergie étant concentrée, p. ex. lasers à balayage ou sources lumineuses focalisées
H01S 5/02325 - Composants intégrés mécaniquement aux éléments de montage ou aux micro-bancs optiques
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
H01S 5/02212 - SupportsBoîtiers caractérisés par la forme des boîtiers du type CAN, p. ex. boîtiers TO-CAN avec émission le long ou parallèlement à l’axe de symétrie
B29K 105/24 - Présentation, forme ou état de la matière moulée réticulée ou vulcanisée
62.
Systems and methods for electrophotography-based additive manufacturing of parts
In a method of producing a 3D part using an electrophotography-based additive manufacturing system, a plurality of layers of a powder-based material are developed using at least one electrophotography (EP) engine. The developed layers are transferred to a transfer medium. The layers on the transfer medium are dried by heating the layers without fully fusing the powder-based material to itself using a dryer. This reduces a water content of the layers. The dried layers are heated on the transfer medium to at least a fusion temperature, at which the power-based material fuses together, using a pre-transfusion heater. The dried layers are then transfused together on a build platform using a transfusion assembly to build the part in a layer-by-layer manner.
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/141 - Procédés de fabrication additive n’utilisant que des matériaux solides
G03G 15/20 - Appareils pour procédés électrographiques utilisant un dessin de charge pour le fixage, p. ex. par la chaleur
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/24 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes au moyen desquels deux phases au moins sont accomplies simultanément
63.
ABS/polycarbonate/poly(styrene-co-maleimide) part material for electrophotography-based additive manufacturing
A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a grafted copolymer (including acrylonitrile units, butadiene units, aromatic units modified with polycarbonate and poly(styrene-co-maleimide)), a charge control agent, and a heat absorber. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
C09D 135/06 - Copolymères avec des monomères vinyliques aromatiques
C09D 151/00 - Compositions de revêtement à base de polymères greffés dans lesquels le composant greffé est obtenu par des réactions faisant intervenir uniquement des liaisons non saturées carbone-carboneCompositions de revêtement à base de dérivés de tels polymères
C09D 169/00 - Compositions de revêtement à base de polycarbonatesCompositions de revêtement à base de dérivés de polycarbonates
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/24 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes au moyen desquels deux phases au moins sont accomplies simultanément
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/141 - Procédés de fabrication additive n’utilisant que des matériaux solides
An additive manufacturing system (100) for printing a three-dimensional part includes a build roller (116) that rotates while receiving part material (254, 368) such that layers of part material (254, 368) are formed on a cylindrical base (349) of the build roller (116) in a cylindrical scroll to form the three-dimensional part, wherein the part material (254, 368) of adjacent layers of part material (254, 368) are bonded together on the build roller (116), and wherein the three-dimensional part can be non-cylindrical.
A method of printing a part in an electrophotographic additive manufacturing system includes printing a part and associated support structure in a layer by layer manner, and providing a chamber in which printing is performed. The chamber is supported by a movable platform and the chamber is positioned about a movable platen. The movable platen is supported by the movable build platform. The movable platen is movable within the chamber on the movable build platform. An electrophotography-based additive manufacturing system for printing a three-dimensional part includes a transfer medium configured to receive and transfer imaged layers of a three-dimensional part, and a support from one or more imaging engines. The system includes a heater configured to heat the imaged layers on the transfer medium to at least a fusion temperature, and a layer transfusion assembly configured to transfuse the imaged layers to the build platen or a previously printed layer.
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
G03G 15/24 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes au moyen desquels deux phases au moins sont accomplies simultanément
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
66.
Electrophotography-based additive manufacturing with support structure and boundary
A method of printing a part in an additive manufacturing system includes printing a support structure for the part, printing a boundary surrounding the support structure, and printing the part on the support structure. An additive manufacturing system for printing a three-dimensional part includes a transfer medium configured to receive and transfer imaged layers of a thermoplastic-based powder for a boundary, a thermoplastic-based powder for a support, and a thermoplastic-based powder for the part from at least two imaging engines, a heater configured to heat the imaged layers on the transfer medium to at least a fusion temperature of the thermoplastic-based powder, and a layer transfusion assembly including a build platform, the layer transfusion assembly being configured to transfuse the heated layers in a layer-by-layer manner onto the build platform to print the three-dimensional part.
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
G03G 15/24 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes au moyen desquels deux phases au moins sont accomplies simultanément
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/141 - Procédés de fabrication additive n’utilisant que des matériaux solides
67.
Soluble support material for electrophotography-based additive manufacturing
A support material for printing a support structure with an electrophotography-based additive manufacturing system, the support material including a composition having a charge control agent and a thermoplastic copolymer having aromatic groups, (meth)acrylate-based ester groups, carboxylic acid groups, and anhydride groups, with a high anhydride conversion. The composition is provided in a powder form having a controlled particle size, and the support material is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the support structure in a layer-by-layer manner, and is at least partially soluble in an aqueous solution.
G03G 5/00 - Organes d'enregistrement pour enregistrement original par exposition, p. ex. à la lumière, à la chaleur, aux électronsFabrication à cet effetEmploi de matériaux spécifiés dans ce but
G03G 15/08 - Appareils pour procédés électrographiques utilisant un dessin de charge pour développer en utilisant un développateur solide, p. ex. développateur en poudre
G03G 9/08 - Développateurs avec des particules de toner
G03G 5/06 - Couches photoconductricesCouches de génération de charges ou couches de transport de chargesAdditifs à cet effetLiants à cet effet caractérisées par le fait que leur matériau photoconducteur est organique
A method of printing three-dimensional parts with an electrophotography-based additive manufacturing system, with a part material including a composition having an engineering-grade thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
B29C 67/24 - Techniques de façonnage non couvertes par les groupes , ou caractérisés par le choix de la matière
B29C 43/00 - Moulage par pressage, c.-à-d. en appliquant une pression externe pour faire couler la matière à moulerAppareils à cet effet
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
G03G 15/08 - Appareils pour procédés électrographiques utilisant un dessin de charge pour développer en utilisant un développateur solide, p. ex. développateur en poudre
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
B29K 77/00 - Utilisation de polyamides, p. ex. polyesteramides, comme matière de moulage
B29K 105/00 - Présentation, forme ou état de la matière moulée
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
69.
Part material for electrophotography-based additive manufacturing
A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a copolymer (including acrylonitrile units, butadiene units, and aromatic units), a charge control agent, and a heat absorber. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
G03G 9/097 - PlastifiantsAgents de contrôle de charge
G03G 9/09 - Agents colorants pour les particules de toner
G03G 13/08 - Développement utilisant un développateur solide, p. ex. développateur en poudre
B33Y 70/00 - Matériaux spécialement adaptés à la fabrication additive
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
In a method for printing a three-dimensional (3D) parts with an additive manufacturing system, a developed layer of an electrically charged powder material is produced on a transfer medium using an electrophotographic (EP) engine. The transfer medium and the developed layer are fed in a feed direction. A position of the developed layer on the transfer medium is detected using a first sensor having a first output that indicates the position. A position of a moveable build platform is adjusted relative to the transfer medium to reduce one or more overlay errors between the developed layer and an intermediate build surface of a three-dimensional structure retained on the moveable build platform based on the first output. The developed layer is transferred to the intermediate build surface using a pressing element.
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
B33Y 40/00 - Opérations ou équipements auxiliaires, p. ex. pour la manipulation de matériau
B29K 105/00 - Présentation, forme ou état de la matière moulée
71.
Semi-crystalline consumable materials for electrophotography-based additive manufacturing system
A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a semi-crystalline thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
G03G 9/08 - Développateurs avec des particules de toner
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G03G 9/097 - PlastifiantsAgents de contrôle de charge
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
A method for printing a three-dimensional part and a support structure with an electrophotography-based additive manufacturing system. The method includes developing a support layer of the support structure from a soluble support material with a first electrophotography engine, and transferring the developed support layer from the first electrophotography engine to a transfer medium. The method also includes developing a part layer of the three-dimensional part from an ABS part material with a second electrophotography engine, and transferring the developed part layer from the second electrophotography engine to the transfer medium. The method further includes moving the attracted part and support layers to a layer transfusion assembly with the transfer medium, and transfusing the moved part and support layers together to previously-printed layers with the layer transfusion assembly.
B29C 41/02 - Façonnage par revêtement d'un moule, noyau ou autre support, c.-à-d. par dépôt de la matière à mouler et démoulage de l'objet forméAppareils à cet effet pour la fabrication d'objets de longueur définie, c.-à-d. d'objets séparés
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G03G 13/22 - Procédés impliquant la combinaison de plusieurs phases de traitement comprises dans les groupes
B29C 64/135 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux utilisant des couches de liquide à solidification sélective caractérisés par la source d'énergie à cet effet, p. ex. par irradiation globale combinée avec un masque la source d’énergie étant concentrée, p. ex. lasers à balayage ou sources lumineuses focalisées
B29C 64/165 - Procédés de fabrication additive utilisant une combinaison de matériaux solides et liquides, p. ex. une poudre avec liaison sélective par liant liquide, catalyseur, inhibiteur ou absorbeur d’énergie
B29C 64/141 - Procédés de fabrication additive n’utilisant que des matériaux solides
B29C 64/129 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux utilisant des couches de liquide à solidification sélective caractérisés par la source d'énergie à cet effet, p. ex. par irradiation globale combinée avec un masque
B29C 64/153 - Procédés de fabrication additive n’utilisant que des matériaux solides utilisant des couches de poudre avec jonction sélective, p. ex. par frittage ou fusion laser sélectif
B29C 64/106 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux
B29C 64/00 - Fabrication additive, c.-à-d. fabrication d’objets en trois dimensions [3D] par dépôt additif, agglomération additive ou stratification additive, p. ex. par impression en 3D, stéréolithographie ou frittage laser sélectif
B29C 64/124 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux utilisant des couches de liquide à solidification sélective
B29C 64/112 - Procédés de fabrication additive n’utilisant que des matériaux liquides ou visqueux, p. ex. dépôt d’un cordon continu de matériau visqueux utilisant des gouttelettes individuelles, p. ex. de buses de jet
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B33Y 70/00 - Matériaux spécialement adaptés à la fabrication additive
B29C 47/00 - Moulage par extrusion, c. à d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désirée; Appareils à cet effet (moulage par extrusion-soufflage B29C 49/04)
B29C 47/08 - Eléments constitutifs, détails ou accessoires; Opérations auxiliaires
B29K 33/00 - Utilisation de polymères d'acides non saturés ou de leurs dérivés comme matière de moulage
B29K 25/00 - Utilisation de polymères de composés vinylaromatiques comme matière de moulage
B29K 105/00 - Présentation, forme ou état de la matière moulée
A method and system for printing a three-dimensional part, which includes rotating a transfer belt with a developed layer, scanning the developed layer on the rotating transfer belt, pressing the developed layer into contact with an intermediate build surface of the three-dimensional part retained on a moveable build platform, scanning the pressed layer on the three-dimensional part, comparing the scanned layers to detect an overlay error, and adjusting a position of the moveable build platform relative to the transfer belt to reduce the overlay error for a subsequent developed layer.
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
A method and system for printing a three-dimensional part, which includes printing a plurality of successive layers of the three-dimensional part with the additive manufacturing system based on bitslices in a bitslice stack, measuring surface heights of the successive layers after each of the successive layers are printed, determining differences between the measured surface heights and predicted stack heights of the bitslices, identifying one or more topographical error regions based on the determined differences, and modifying the bitslice stack to compensate for the one or more topographical error regions.
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
A method and system for printing a three-dimensional part, which includes producing a developed layer of a part material with one or more electrophotography engines of an additive manufacturing system, transferring the developed layer from the one or more electrophotography engines to a transfer assembly of the additive manufacturing system sintering the developed layer at the transfer assembly to produce a sintered contiguous film, cooling the sintered contiguous film down to a transfer temperature, and pressing the cooled sintered contiguous film into contact with an intermediate build surface of the three-dimensional part with a low applied pressure.
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
76.
Electrophotography-based additive manufacturing with powder density detection and utilization
An additive manufacturing system for printing a three-dimensional part, which includes one or more electrophotography engines configured to develop layers of the three-dimensional part, a rotatable transfer belt configured to receive the developed layers from the electrophotography engine(s), a detector configured to measure powder densities of the developed layers on the rotatable transfer belt, and to transmit signals relating to the measured powder densities to a controller assembly, and a printing assembly configured to receive the developed layer from the rotatable transfer belt and to print the three-dimensional part from the developed layers.
B29C 65/00 - Assemblage d'éléments préformésAppareils à cet effet
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G01N 27/22 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant l'impédance en recherchant la capacité
G01R 1/18 - Aménagements de blindage contre les champs électriques ou magnétiques, p. ex. contre le champ terrestre
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
An additive manufacturing system and process for printing a three-dimensional part, which includes one or more electrophotography engines configured to develop layers of the three-dimensional part, a printing assembly configured to print the three-dimensional part from the developed layers, and a planarizer configured to conduct solvent-assisted planarizations on intermediate build surfaces of the three-dimensional part after one or more of the developed layers are printed.
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 64/188 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
A support material for printing a support structure with an electrophotography-based additive manufacturing system, the support material including a composition having a charge control agent and a thermoplastic copolymer having aromatic groups, (meth)acrylate-based ester groups, carboxylic acid groups, and anhydride groups, with a high anhydride conversion. The composition is provided in a powder form having a controlled particle size, and the support material is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the support structure in a layer-by-layer manner, and is at least partially soluble in an aqueous solution.
G03G 9/08 - Développateurs avec des particules de toner
G03G 5/06 - Couches photoconductricesCouches de génération de charges ou couches de transport de chargesAdditifs à cet effetLiants à cet effet caractérisées par le fait que leur matériau photoconducteur est organique
G03G 13/18 - Transfert d'un dessin à un second support d'un dessin de charge
G03G 9/097 - PlastifiantsAgents de contrôle de charge
G03G 15/02 - Appareils pour procédés électrographiques utilisant un dessin de charge pour déposer une charge uniforme, p. ex. pour sensibiliserDispositifs pour la décharge corona
A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a copolymer (including acrylonitrile units, butadiene units, and aromatic units), a charge control agent, and a heat absorber. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
A platen assembly for use in an additive manufacturing system, which includes a platen plate that is preferably secured to a gantry mechanism of the additive manufacturing system, and having a top surface, and one or more magnets secured to the platen plate and configured to generate one or more magnetic fields at the top surface of the platen plate. The platen gantry is configured to magnetically couple interchangeable and replaceable build sheets to the top surface of the platen plate due to the one or more generated magnetic fields, and where the magnetically-coupled build sheets are configured to receive the printed layers from the printing mechanism.
B29C 35/08 - Chauffage ou durcissement, p. ex. réticulation ou vulcanisation utilisant l'énergie ondulatoire ou un rayonnement corpusculaire
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
81.
Engineering-grade consumable materials for electrophotography-based additive manufacturing
A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having an engineering-grade thermoplastic material and a charge control agent. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
B29C 67/24 - Techniques de façonnage non couvertes par les groupes , ou caractérisés par le choix de la matière
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29K 77/00 - Utilisation de polyamides, p. ex. polyesteramides, comme matière de moulage
B29K 105/00 - Présentation, forme ou état de la matière moulée
82.
Soluble support material for electrophotography-based additive manufacturing
A support material for printing a support structure with an electrophotography-based additive manufacturing system, the support material including a composition having a charge control agent and a thermoplastic copolymer having aromatic groups, (meth)acrylate-based ester groups, carboxylic acid groups, and anhydride groups, with a high anhydride conversion. The composition is provided in a powder form having a controlled particle size, and the support material is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the support structure in a layer-by-layer manner, and is at least partially soluble in an aqueous solution.
A method for printing a three-dimensional part and a support structure with an electrophotography-based additive manufacturing system. The method includes developing a support layer of the support structure from a soluble support material with a first electrophotography engine, and transferring the developed support layer from the first electrophotography engine to a transfer medium. The method also includes developing a part layer of the three-dimensional part from an ABS part material with a second electrophotography engine, and transferring the developed part layer from the second electrophotography engine to the transfer medium. The method further includes moving the attracted part and support layers to a layer transfusion assembly with the transfer medium, and transfusing the moved part and support layers together to previously-printed layers with the layer transfusion assembly.
B29C 35/08 - Chauffage ou durcissement, p. ex. réticulation ou vulcanisation utilisant l'énergie ondulatoire ou un rayonnement corpusculaire
B29C 41/02 - Façonnage par revêtement d'un moule, noyau ou autre support, c.-à-d. par dépôt de la matière à mouler et démoulage de l'objet forméAppareils à cet effet pour la fabrication d'objets de longueur définie, c.-à-d. d'objets séparés
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G03G 13/22 - Procédés impliquant la combinaison de plusieurs phases de traitement comprises dans les groupes
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B33Y 70/00 - Matériaux spécialement adaptés à la fabrication additive
A part material for printing three-dimensional parts with an electrophotography-based additive manufacturing system, the part material including a composition having a copolymer (including acrylonitrile units, butadiene units, and aromatic units), a charge control agent, and a heat absorber. The part material is provided in a powder form having a controlled particle size, and is configured for use in the electrophotography-based additive manufacturing system having a layer transfusion assembly for printing the three-dimensional parts in a layer-by-layer manner.
An additive manufacturing system for printing a three-dimensional part using electrophotography, the additive manufacturing system comprising a rotatable photoconductor component, first and second development stations configured to develop layers of materials on a surface of the rotatable photoconductor component while the rotatable photoconductor component rotates in opposing rotational directions, and a platen configured to operably receive the developed layers in a layer-by-layer manner to print the three-dimensional part from at least a portion of the received layers.
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
86.
Electrophotography-based additive manufacturing system with transfer-medium service loops
An additive manufacturing system for printing a three-dimensional part using electrophotography, the additive manufacturing system including a rotatable photoconductor component, a development station configured to develop layers of a material on a surface of the rotatable photoconductor component, a rotatable transfer medium configured to receive the developed layers from the surface of the rotatable photoconductor component, and a platen configured to receive the developed layers from the rotatable transfer medium in a layer-by-layer manner. The additive manufacturing system also includes a plurality of service loops configured to move portions of the rotatable transfer medium at different line speeds while maintaining a net rotational rate of full rotations of the rotatable transfer medium at a substantially steady state.
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
G03G 13/00 - Procédés électrographiques utilisant un dessin de charge
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
87.
Electrophotography-based additive manufacturing system with reciprocating operation
An additive manufacturing system for printing a three-dimensional part using electrophotography, the additive manufacturing system comprising a rotatable photoconductor component, first and second development stations configured to develop layers of materials on a surface of the rotatable photoconductor component while the rotatable photoconductor component rotates in opposing rotational directions, and a platen configured to operably receive the developed layers in a layer-by-layer manner to print the three-dimensional part from at least a portion of the received layers.
G03G 15/01 - Appareils pour procédés électrographiques utilisant un dessin de charge pour reproduire des copies multicolores
G03G 15/00 - Appareils pour procédés électrographiques utilisant un dessin de charge
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
An additive manufacturing system comprising a transfer medium configured to receive the layers from a imaging engine, a heater configured to heat the layers on the transfer medium, and a layer transfusion assembly that includes a build platform, and is configured to transfuse the heated layers onto the build platform in a layer-by-layer manner to print a three-dimensional part.
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
An additive manufacturing system comprising a transfer medium configured to receive the layers from a imaging engine, a heater configured to heat the layers on the transfer medium, and a layer transfusion assembly that includes a build platform, and is configured to transfuse the heated layers onto the build platform in a layer-by-layer manner to print a three-dimensional part.
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
An additive manufacturing system comprising a transfer medium configured to receive the layers from a imaging engine, a heater configured to heat the layers on the transfer medium, and a layer transfusion assembly that includes a build platform, and is configured to transfuse the heated layers onto the build platform in a layer-by-layer manner to print a three-dimensional part.
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
91.
Layer transfusion with rotatable belt for additive manufacturing
An additive manufacturing system comprising a transfer medium configured to receive the layers from a imaging engine, a heater configured to heat the layers on the transfer medium, and a layer transfusion assembly that includes a build platform, and is configured to transfuse the heated layers onto the build platform in a layer-by-layer manner to print a three-dimensional part.
G03G 15/16 - Appareils pour procédés électrographiques utilisant un dessin de charge pour transférer un dessin à un second support d'un dessin de teinte, p. ex. dessin de poudre
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
G03G 15/20 - Appareils pour procédés électrographiques utilisant un dessin de charge pour le fixage, p. ex. par la chaleur
An additive manufacturing system for printing a three-dimensional part using electrophotography, the additive manufacturing system including a rotatable photoconductor component, a development station configured to develop layers of a material on a surface of the rotatable photoconductor component, a rotatable transfer medium configured to receive the developed layers from the surface of the rotatable photoconductor component, and a platen configured to receive the developed layers from the rotatable transfer medium in a layer-by-layer manner. The additive manufacturing system also includes a plurality of service loops configured to move portions of the rotatable transfer medium at different line speeds while maintaining a net rotational rate of full rotations of the rotatable transfer medium at a substantially steady state.
G03G 15/22 - Appareils pour procédés électrographiques utilisant un dessin de charge impliquant la combinaison de plus d'une phase de traitement comprise dans les groupes
