A device for producing a three-dimensional shaped object, including a substrate part having a base surface for holding the shaped object, a first reservoir for holding a flowable first material, a second reservoir for holding a flowable second material, a dispensing mechanism for dispensing material portions of the first material, a material application mechanism including an application roll and a coating mechanism for applying a second material layer of the second material, and a fixation mechanism for solidifying the material layers composed of the first material and the second material. The transfer body rotates about an axis of rotation disposed parallel to the base surface, the dispensing mechanism and the application roll r relative to the substrate part about an axis disposed normal to the base surface, the application roll is conical, and an axis of rotation of the application roll intersects the axis disposed normal to the base surface.
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 64/188 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur
B33Y 70/00 - Matériaux spécialement adaptés à la fabrication additive
In the case of a method for producing a three-dimensional shaped object by means of layer-by-layer material application, a base surface for holding the three-dimensional shaped object, a liquid, flowable or powder-form first material that can solidify, a powder-form second material including thermoplastic powder particles, and a solvent are made available. From the first material, a negative mold layer having a cavity for a shaped-object layer to be produced is produced and solidified. The bottom of the cavity is charged to an electric potential having a first polarity, and the powder particles are charged to a potential having a second polarity. The powder particles are applied to a support surface that is positioned relative to the cavity in such a manner that the powder particles are transferred from the support surface into the cavity and form a shaped-object layer having a positive shape that matches the negative mold in this cavity. The shaped-object layer is sintered by means of the effect of heat. A planar surface is produced by means of material removal, which surface extends over the negative mold layer and the shaped-object layer. The above steps are repeated at least once. Afterward the negative mold layers are dissolved in the solvent.
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
The invention relates to an apparatus and to a method for producing a three-dimensional shaped object by means of material application in layers Sn (n=1 to N), which has at least a material dispensing device, a drive device, a print substrate, a control device having a data memory, and a material removal device. In order to be able to recognize and eliminate defects in a layer Sn, which can still occur later, i.e., after completion of this layer Sn, it is proposed, according to the invention, to provide a monitoring device. Furthermore, a downstream evaluation device determines a layer Sx in which the at least one defect was detected. Thereupon an error signal is generated and passed on to the control device. The material removal device completely removes the material of a partial region of the shaped object, from the layer SN that was last printed, down to the first of the defective layers Sx. Building up the three-dimensional shaped object begins anew at the layer Sx−1.
B29C 64/188 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur
k in question. Dispensing of the material portions takes place in print cycles in which the emitter array is triggered to dispense material once, in each instance, at a trigger point assigned to the print cycle in question, in each instance, and the support as well as the emitter array are offset relative to one another, from print cycle to print cycle, in each instance, by an angular distance with reference to the axis of rotation. Printing of all the print dots of a row takes place in a number of print cycles that is greater than the number of emitter columns. The print cycle is selected, for each print dot to be printed, in each instance, in such a manner that the angular difference between the rotational position of the trigger point of the print cycle and the rotational position in which the print dot to be printed is arranged with reference to the axis of rotation when the support is positioned at the trigger point relative to the emitter array is not greater, in terms of amount, than half the angular distance between the trigger points.
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/241 - Moyens d’entraînement pour mouvement rotatif
B29C 64/277 - Agencements pour irradiation utilisant des moyens de rayonnement multiples, p. ex. des micro-miroirs ou des diodes électroluminescentes multiples [LED]
In a method for producing a solid-body layer, an emitter array is provided. A support is rotationally positioned relative to the emitter array, about an axis of rotation, and material portions of a material that passes through the nozzles are applied to the support and solidified. The center point of the emitter farthest away from the axis of rotation has a first radial distance, and the emitter arranged closest to the axis of rotation has a second radial distance from the axis of rotation. A trigger signal is generated, which defines trigger points. A material dispensing signal is generated and temporarily stored, in each instance, for the individual emitters, as a function of geometry data and/or as a function of the position in which the emitter in question is arranged relative to the support, when the emitter is positioned at the corresponding trigger point. The emitters are controlled at the trigger points in such a manner that only those emitters in which the material dispensing signal is set dispense material. The angle between trigger points that are adjacent to one another corresponds to the angle that a first and a second radial line enclose between them. The first radial line runs from the axis of rotation to the intersection point between a first emitter column and a reference circle line that is concentric to the axis of rotation. The second radial line runs from the axis of rotation to the intersection point between a second emitter column and the reference circle line. The radius of the reference circle line is less than the sum of 90% of the first and 10% of the second distance. The radius is greater than the sum of 10% of the first and 90% of the second distance.
B29C 64/277 - Agencements pour irradiation utilisant des moyens de rayonnement multiples, p. ex. des micro-miroirs ou des diodes électroluminescentes multiples [LED]
B29C 64/241 - Moyens d’entraînement pour mouvement rotatif
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
In a method for producing a three-dimensional mold and a three-dimensional shaped object by means of layer-by-layer material application, geometry data for the shaped object, a support part having a base surface for holding the three-dimensional shaped object, and a first and a second material that can be solidified are made available. In the solidified state, the second material includes at least one main component that can be cross-linked by means of treatment with energy, and a latent hardener that can be thermally activated, by means of which chemical cross-linking of the main component can be triggered by means of the effect of heat. To form a negative-shape layer, the first material is applied to the base surface and/or to a solidified material layer of the three-dimensional shaped object situated on this surface, in accordance with the geometry data, in such a manner that the negative-shape layer has at least one cavity that has a negative shape of a material layer of the shaped object to be produced. The negative-shape layer is solidified. To form a shaped-object layer, the cavity is filled with the second material, and afterward its main component is partially cross-linked by means of treatment with energy, and solidified. Regions of the solidified negative-shape layer and/or shaped-object layer that project beyond a plane arranged at a distance from the base surface are removed by means of material removal. The steps mentioned above are repeated at least once. The main component is further cross-linked by means of a heat treatment, and solidified in such a manner that the second material has a greater strength than the solidified first material and the second material after partial cross-linking. The negative-shape layers are removed from the shaped object.
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
B33Y 40/20 - Posttraitement, p. ex. durcissement, revêtement ou polissage
B33Y 70/10 - Composites de différents types de matériaux, p. ex. mélanges de céramiques et de polymères ou mélanges de métaux et de biomatériaux
B29K 29/00 - Utilisation de poly(alcool de vinyle), poly(éthers de vinyle), poly(aldéhydes de vinyle), poly(cétones de vinyle) ou poly(cétals de vinyle) comme matière de moulage
B29K 33/00 - Utilisation de polymères d'acides non saturés ou de leurs dérivés comme matière de moulage
B29K 63/00 - Utilisation de résines époxy comme matière de moulage
B29K 86/00 - Utilisation de polymères particuliers obtenus par polycondensation ou polyaddition non prévus dans un seul des groupes principaux comme matière de moulage
7.
Device for applying flowable material to a substratum that can be rotated about an axis of rotation
A device for applying flowable material to a substratum rotated about an axis of rotation, in accordance with image data stored as pixels or vectors of a Cartesian coordinate grid in a first memory, has at least one printing head for discharging material drops of the flowable material, and is arranged above the substratum, and a controller for positioning the substratum in relation to the printing head and controlling the discharge of the material drops. In a second memory, special polar coordinate grid points arranged on circular lines and on first rays having a first angular distance and, in the direction of origin, on further rays having an angular distance from each other that is greater than the first angular distance are stored. The special polar coordinate grid points are transformed into coordinates of the Cartesian coordinate system, and are compared with the pixels of the image file.
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 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
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
G06V 10/75 - Organisation de procédés de l’appariement, p. ex. comparaisons simultanées ou séquentielles des caractéristiques d’images ou de vidéosApproches-approximative-fine, p. ex. approches multi-échellesAppariement de motifs d’image ou de vidéoMesures de proximité dans les espaces de caractéristiques utilisant l’analyse de contexteSélection des dictionnaires
In a method for producing a three-dimensional mold and a three-dimensional shaped object (1) by means of layer-by-layer material application, geometry data for the shaped object (1), a support part (2) having a base surface (3) for holding the three-dimensional shaped object (1), and a first and a second material (4, 5) that can be solidified are made available. In the solidified state, the second material (5) has a greater strength than the solidified first material (4). The solidified first material (4) can dissolve in the solvent. To form a negative-shape layer (12), material portions of the flowable first material (4) are applied to the base surface (3) and/or to a solidified material layer of the three-dimensional shaped object (1) situated on this surface, in accordance with the geometry data, in such a manner that the negative-shape layer (12) has at least one cavity (13) that has a negative shape of a material layer of the shaped object (1) to be produced. The negative-shape layer (12) is solidified. To form a shaped-object layer (16), the cavity (13) is filled with the second material (5), and afterward the second material (5) is solidified. Regions of the solidified negative-shape layer (12) and/or shaped-object layer (16) that project beyond a plane arranged at a predetermined distance from the base surface (3) are removed by means of machining material removal. The steps mentioned above are repeated at least once. The negative-shape layers (12) are brought into contact with the solvent in such a manner that the solidified first material (4) dissolves in a solvent.
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 64/188 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur
In a method for producing a molded three-dimensional object using a layer-by-layer material application, a base surface (3) for receiving the molded three-dimensional object, a liquid, flowable, or pulverulent first material (4) which can be solidified, a second material (5) which comprises pulverulent thermoplastic powder particles, and a solvent (33) are provided. A negative mold layer (12) with a cavity (13) for a molded object layer (16) to be produced is made from the first material, and the negative mold layer is solidified. The base of the cavity (13) is charged to an electric potential of a first polarity, and the powder particles are charged to a potential of a second polarity. The powder particles are applied onto a support surface which is positioned relative to the cavity (13) such that the powder particles are transferred from the support surface into the cavity (13) and, in the cavity, form a molded object layer (16) with a positive mold which matches the negative mold. The molded object layer (16) is sintered by applying heat. A flat surface is produced by removing material, said surface extending over the negative mold layer (12) and the molded object layer (16). The aforementioned steps are repeated at least once. The negative mold layers (12) are then released in the solvent.
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
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
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
10.
APPARATUS AND METHOD FOR PRODUCING A THREE-DIMENSIONAL SHAPED OBJECT
The invention relates to an apparatus (100) and a method for manufacturing a three-dimensional moulded article (200) by means of material application in layers Sn (n=1 to N), said apparatus comprising at least one material delivery device (300), a drive device (410), a printing substrate (400), a control device (500) having a data memory (510), and a material removal device (700). According to the invention, a monitoring device (600) is provided so that defects in a layer Sn, which may also occur later, i.e. after completion of said layer Sn, are also detected and eliminated. Furthermore, a downstream evaluation device (610) detects a layer Sx in which the at least one defect was detected. Subsequently, a default signal is generated and forwarded to the control device (500). The material removal device (700) completely removes the material of a partial region (T) of the moulded article (200) starting from the most recently printed layer SN up to the first of the defective layers Sx. The building up of the three-dimensional moulded object (200) starts again on layer Sx-1.
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
B33Y 50/02 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B29C 64/194 - 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
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
B33Y 40/20 - Posttraitement, p. ex. durcissement, revêtement ou polissage
B22F 10/38 - Commande ou régulation des opérations pour obtenir des caractéristiques spécifiques du produit, p. ex. le lissage de la surface, la densité, la porosité ou des structures creuses
B22F 10/85 - Acquisition ou traitement des données pour la commande ou la régulation de procédés de fabrication additive
B22F 12/60 - Dispositifs de planarisationDispositifs de compression
B22F 12/90 - Moyens de commande ou de régulation des opérations, p. ex. caméras ou capteurs
11.
METHOD FOR PRODUCING AT LEAST ONE SOLID-BODY LAYER ON A SUPPORT THAT CAN ROTATE ABOUT AN AXIS OF ROTATION
The invention relates to a method for producing at least one solid body layer on a substrate (1), which is rotatable about an axis of rotation (2), according to specified geometric data, in which method an emitter assembly (11) is provided, which has a plurality of emitters which are designed as material dispensing nozzles and are arranged in emitter columns and emitter lines. Emitter columns adjacent to one another in the circumferential direction of an axis of rotation (2) are each offset relative to one another in the extension direction of the emitter columns in such a way that the emitters are arranged at different radial distances DA(i) from the axis of rotation (2), wherein the following applies: DA(i) DA(i+1). Printing points are assigned to the geometric data and are offset relative to one another in a matrix with a plurality of rows running alongside one another in such a way that the following applies: PA(j) > PA(j+1), where PA(j) is the radial distance of the j-th printing point Pj of the relevant row from the axis of rotation (2). For printing points Pk, for which material is to be dispensed onto the substrate (2), in each case at least one material portion is dispensed from the emitter Dk of the emitter assembly assigned to the relevant printing point Pk. The material portions are dispensed in printing cycles, in each of which the emitter assembly for dispensing material is triggered once at a trigger point assigned to the relevant printing cycle, and from printing cycle to printing cycle the substrate (1) as well as the emitter assembly are each offset relative to one another by an angular distance from the axis of rotation (2). All printing points in a row are printed in a number of printing cycles which is greater than the number of emitter columns. For each printing point to be printed, the printing cycle is selected in such a way that the angular difference between the rotational position of the trigger point of the printing cycle and the rotational position at which a printing point to be printed is arranged with respect to the axis of rotation, when the substrate (1) is positioned relative to the emitter assembly at the trigger point, is not greater in terms of amount than half of the angular distance between the trigger points.
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
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
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 64/153 - 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 emitter arrangement (11) is provided within the scope of a method for producing a solid layer. A base (1) is rotationally positioned relative to the emitter arrangement about an axis of rotation (2) and material portions of a material that passes through a nozzle are applied to the base and solidified. The center of the emitter (12) situated furthest away from the axis of rotation and the center of the emitter (12) arranged closest to the axis of rotation have a first and second radial distance, respectively, from the axis of rotation. A trigger signal which defines trigger points is generated. A respective material emission signal is generated and buffer stored for each of the individual emitters on the basis of geometry data and/or on the basis of the position at which the relevant emitter is arranged relative to the base when said emitter is positioned at the respective trigger point. At the trigger points, the emitters are controlled in such a way that material is only emitted by those emitters where the material emission signal has been set. The angle between adjacent trigger points corresponds to the angle included between a first and a second radial line. The first radial line extends from the axis of rotation to the point of intersection between a first emitter column and a reference circle (25) that is concentric with the axis of rotation. The second radial line extends from the axis of rotation to the point of intersection between a second emitter column and the reference circle. The radius of the reference circle is less than the sum of 90% of the first distance and 10% of the second distance. The radius is greater than the sum of 10% of the first distance and 90% of the second distance.
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 64/241 - Moyens d’entraînement pour mouvement rotatif
B29C 64/277 - Agencements pour irradiation utilisant des moyens de rayonnement multiples, p. ex. des micro-miroirs ou des diodes électroluminescentes multiples [LED]
B29C 64/393 - Acquisition ou traitement de données pour la fabrication additive pour la commande ou la régulation de procédés de fabrication additive
In a method for producing a three-dimensional mould and a three-dimensional shaped article (1) by means of layer-by-layer material application, geometric data for the shaped article (1), a carrier part (2) having a base surface (3) for accommodating the three-dimensional shaped article (1) and a consolidatable first and second material (4, 5) are provided. The second material (5) comprises at least one main component cross-linkable by treatment with energy and a thermally activatable, latent curing agent, by means of which a chemical cross-linking of the main component can be triggered by the action of heat. For forming a negative mould layer (12), the first material (4) is applied in accordance with geometric data to the base surface (3) and/or a consolidated material layer of the three-dimensional shaped article (1) present thereon in such a way that the negative mould layer (12) has at least one cavity (13) that has a negative mould of a material layer of the shaped article (1) to be produced. The negative mould layer (12) is consolidated. For formation of a shaped article layer (16), the cavity (13) is filled with the second material (5) and then the main component of the second material is partially cross-linked and is consolidated by treatment with energy. By means of a plane disposed at a distance from the base surface (3), protruding regions of the consolidated negative mould layer (12) and/or shaped article layer (16) are removed by material removal. The aforementioned steps are repeated at least once. The main component is further cross-linked by a heat treatment and is consolidated in such a way that the second material (5) has a higher strength than the consolidated first material (4) and the second material after the partial cross-linking. The negative mould layers (12) are removed from the shaped article (1).
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
B29C 64/165 - 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 64/188 - Procédés de fabrication additive impliquant des opérations supplémentaires effectuées sur les couches ajoutées, p. ex. lissage, meulage ou contrôle d’épaisseur
B29C 70/58 - Façonnage de matières composites, c.-à-d. de matières plastiques comprenant des renforcements, des matières de remplissage ou des parties préformées, p. ex. des inserts comprenant uniquement des matières de remplissage
14.
METHOD FOR PRODUCING A THREE-DIMENSIONAL SHAPED OBJECT BY MEANS OF LAYER-BY-LAYER MATERIAL APPLICATION
In a method of producing a three-dimensional mould and a three-dimensional moulded article (1) by means of layer-by-layer material application, geometric data for the moulded article (1), a carrier part (2) having a base area (3) for accommodating the three-dimensional moulded article (1), a consolidatable first and second material (4, 5) are provided. The second material (5) has a higher strength in the consolidated state than the solidified first material (4). The consolidated first material (4) is dissolvable in the solvent. For formation of a negative mould layer (12), material portions of the free-flowing first material (4) are applied in accordance with the geometric data to the base area (3) and/or a material layer of the three-dimensional moulded article (1) present thereon in such a way that the negative mould layer (12) has at least one cavity (13) that has a negative mould of a material layer of the moulded article (1) to be produced. The negative mould layer (12) is consolidated. For formation of a moulded article layer (16), the cavity (13) is filled with a second material (5) and then the second material (5) is consolidated. By means of a plane disposed at a predetermined distance from the base area (3), protruding regions of the consolidated negative mould layer (12) and/or moulded article layer (16) are removed by material removal. The aforementioned steps are repeated at least once. The negative mould layers (12) are contacted with the solvent in such a way that the consolidated first material (4) dissolves in a solvent.
B29C 64/40 - Structures de support des objets en 3D pendant la fabrication, lesdites structures devant être sacrifiées après réalisation de la fabrication
B29C 41/36 - Alimentation en matière à mouler d'un moule, d'un noyau ou d'un autre support
15.
Method and device for producing a three-dimensional shaped object by means of layer-by-layer material application
The invention relates to a method for producing a three-dimensional shaped object without height limitation by means of layer-by-layer material application, wherein geometric data for the shaped object, a substrate part having a base surface for holding the shaped object, flowable first and second material, and a transfer body are provided. Material portions of the flowable first material are applied to the base surface and/or to a solidified material layer of the three-dimensional shaped object located on the base surface in accordance with the geometric data in order to produce a material layer of the three-dimensional shaped object. The material layer consisting of the first material is solidified. A surface region of the transfer body is coated with a layer of the second material, and said layer is brought into contact with the surface of the topmost solidified material layer of the three-dimensional shaped object facing away from the base surface in such a way that the flowable second material is transferred from the transfer body to the surface of the topmost solidified material layer of the three-dimensional shaped object and forms the further material layer on the surface of the topmost solidified material layer of the three-dimensional shaped object, the structure of which further layer corresponds to the structure of the topmost solidified material layer of the three-dimensional shaped object. The further material layer is likewise solidified.
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
The invention relates to a device for applying flowable material to a substratum (3), which can be rotated about an axis of rotation (4), in accordance with specified image data, which are stored as pixels or as vectors of a certain Cartesian coordinate grid in a first memory (18), has at least one printing head (13A, 13B), which has a plurality of nozzles arranged at a nozzle distance from each other for discharging material drops of the flowable material and is arranged at a vertical distance from the substratum, and a controller (8) for positioning the substratum (3) in relation to the at least one printing head (13A, 13B) and the discharge of the material drops. In a second memory (19), particular polar coordinate grid points (20A, 20B) of a certain polar coordinate grid are stored, which polar coordinate grid points are arranged on circular lines (R1, R2) having a predetermined circular-line distance from each other and are arranged on first rays (A1), which have a first angular distance from each other and are arranged in the direction of origin on further rays (A2) having an angular distance from each other that is greater than the first angular distance. A computer (15) is present, by means of which the particular polar coordinate grid points (20A, 20B) stored in the second memory (19) can be transformed into coordinates of the certain Cartesian coordinate system and the Cartesian grid points thus obtained are compared with the pixels of the image file.
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
B33Y 30/00 - Appareils pour la fabrication additiveLeurs parties constitutives ou accessoires à cet effet
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
The invention relates to a device for applying flowable material to a substratum (3), which can be rotated about an axis of rotation (4), in accordance with specified image data, which are stored as pixels or as vectors of a certain Cartesian coordinate grid in a first memory (18), has at least one printing head (13A, 13B), which has a plurality of nozzles arranged at a nozzle distance from each other for discharging material drops of the flowable material and is arranged at a vertical distance from the substratum, and a controller (8) for positioning the substratum (3) in relation to the at least one printing head (13A, 13B) and the discharge of the material drops. In a second memory (19), particular polar coordinate grid points (20A, 20B) of a certain polar coordinate grid are stored, which polar coordinate grid points are arranged on circular lines (R1, R2) having a predetermined circular-line distance from each other and are arranged on first rays (A1), which have a first angular distance from each other and are arranged in the direction of origin on further rays (A2) having an angular distance from each other that is greater than the first angular distance. A computer (15) is present, by means of which the particular polar coordinate grid points (20A, 20B) stored in the second memory (19) can be transformed into coordinates of the certain Cartesian coordinate system and the Cartesian grid points thus obtained are compared with the pixels of the image file.
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
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
brevets
