A method of additive manufacturing for manufacturing an abrasive article (1) layer-by-layer. The method comprises depositing a layer of slurry (4), wherein the slurry (4) comprises a mixture comprising a liquid and abrasive particles, and applying a radiation source (6) on the layer of slurry (4) for curing thereof before depositing a new layer of slurry (4), wherein the radiation source (6) comprises a rotating exposure. In a further aspect, an additive manufacturing apparatus for manufacturing an abrasive article (1) layer-by-layer is also provided.
Extruder based print head (1) for 3D printing with a material feed unit (2) for providing material in granular and/or liquid feed form, a material extrusion unit (3) arranged to receive the material in granular and/or liquid feed form and transform the material into liquefied material in print form, and a nozzle unit (4) in fluid communication with the material extrusion unit (3), the nozzle unit (3) comprising an output channel (5) and a nozzle (6) arranged to output the liquefied material. Furthermore, an internal volume enlargement unit (7) is provided in fluid communication with the output channel (5) of the nozzle unit (4), wherein the internal volume enlargement unit (7) has a first internal volume in a first operational status and a second internal volume in a second operational status, wherein the second internal volume is larger than the first internal volume.
A method of additive manufacturing for manufacturing an abrasive article (1) layer-by-layer. The method comprises depositing a layer of slurry (4), wherein the slurry (4) comprises a mixture comprising a liquid and abrasive particles, and applying a radiation source (6) on the layer of slurry (4) for curing thereof before depositing a new layer of slurry (4), wherein the radiation source (6) comprises a rotating exposure. In a further aspect, an additive manufacturing apparatus for manufacturing an abrasive article (1) layer-by-layer is also provided.
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B33Y 80/00 - Products made by additive manufacturing
B24D 18/00 - Manufacture of grinding tools, e.g. wheels, not otherwise provided for
B29C 64/165 - Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
B29C 64/106 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
B29C 64/129 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
The present invention concerns a method for the manufacture of a three-dimensional object, comprising (a) providing a three-dimensional model of the object, which divides the object in voxels; (b) applying a first layer of a radiation-curable slurry onto a target surface, wherein the slurry contains a polymerizable resin and a photoinitiator; (c) polymerizing the resin by illuminating the voxels of the first layer in accordance with the model with radiation at a temperature above room temperature and above the glass transition temperature of the polymerized resin, to cause polymerization of the resin to form a cross-linked polymeric matrix; (d) applying a subsequent layer of the slurry on top of the first layer; (e) polymerizing the resin by scanning the voxels of the subsequent layer in accordance with the model with radiation at a temperature above room temperature and above the glass transition temperature of the polymerized resin, to cause polymerization of the resin to form a cross-linked polymeric matrix; (f) repeating steps (d) and (e), wherein each time a subsequent layer is applied onto the previous layer, to produce a green body; and optionally (g) debinding and (h) sintering of the three-dimensional object. The invention further concerns the three-dimensional object obtained thereby and an additive manufacturing system suitable for performing the method according to the invention.
B29C 64/165 - Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
B29C 64/386 - Data acquisition or data processing for additive manufacturing
B28B 1/00 - Producing shaped articles from the material
Extruder based print head (1) for 3D printing with a material feed unit (2) for providing material in granular and/or liquid feed form, a material extrusion unit (3) arranged to receive the material in granular and/or liquid feed form and transform the material into liquefied material in print form, and a nozzle unit (4) in fluid communication with the material extrusion unit (3), the nozzle unit (3) comprising an output channel (5) and a nozzle (6) arranged to output the liquefied material. Furthermore, an internal volume enlargement unit (7) is provided in fluid communication with the output channel (5) of the nozzle unit (4), wherein the internal volume enlargement unit (7) has a first internal volume in a first operational status and a second internal volume in a second operational status, wherein the second internal volume is larger than the first internal volume.
The present invention concerns a method for the manufacture of a three-dimensional object, comprising (a) providing a three-dimensional model of the object, which divides the object in voxels; (b) applying a first layer of a radiation-curable slurry onto a target surface, wherein the slurry contains a polymerizable resin and a photoinitiator; (c) polymerizing the resin by illuminating the voxels of the first layer in accordance with the model with radiation at a temperature above room temperature and above the glass transition temperature of the polymerized resin, to cause polymerization of the resin to form a cross-linked polymeric matrix; (d) applying a subsequent layer of the slurry on top of the first layer; (e) polymerizing the resin by scanning the voxels of the subsequent layer in accordance with the model with radiation at a temperature above room temperature and above the glass transition temperature of the polymerized resin, to cause polymerization of the resin to form a cross-linked polymeric matrix; (f) repeating steps (d) and (e), wherein each time a subsequent layer is applied onto the previous layer, to produce a green body; and optionally (g) debinding and (h) sintering of the three-dimensional object. The invention further concerns the three-dimensional object obtained thereby and an additive manufacturing system suitable for performing the method according to the invention.
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
B22F 3/105 - Sintering only by using electric current, laser radiation or plasma
B28B 1/00 - Producing shaped articles from the material
B33Y 30/00 - Apparatus for additive manufacturingDetails thereof or accessories therefor
B33Y 80/00 - Products made by additive manufacturing
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor
A radiation-curable slurry for additive manufacturing of 3D metal objects is provided, comprising: (a) 2-45 wt % of a polymerizable resin; (b) 0.001-10 wt % of one or more polymerization photoinitiators; and (c) 55-98 wt % of a mixture of metal-containing compounds, wherein the mixture of metal-containing compounds comprises, based on the weight of said mixture, 5-95 wt % of metal particles and 5-95 wt % of one or more metal precursors. An additive manufacturing method for producing a three-dimensional metal object using the slurry is provided, as well as three-dimensional metal objects obtainable by the method.
B33Y 50/02 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B33Y 70/00 - Materials specially adapted for additive manufacturing
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
B29C 64/393 - Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
B22F 1/107 - Metallic powder containing lubricating or binding agentsMetallic powder containing organic material containing organic material comprising solvents, e.g. for slip casting
B22F 10/12 - Formation of a green body by photopolymerisation, e.g. stereolithography [SLA] or digital light processing [DLP]
B29K 505/00 - Use of metals, their alloys or their compounds, as filler
The present invention relates to a radiation-curable slurry for additive manufacturing of three-dimensional metal objects, said slurry comprising: a) 2-45 wt% of a polymerizable resin; b) 0.001-10 wt% of one or more polymerization photoinitiators; c) 55-98 wt% of a mixture of metal-containing compounds; wherein the mixture of metal-containing compounds comprises, based on the weight of said mixture, 5-95 wt% of metal particles and 5-95 wt% of one or more metal precursors. The invention further relates to an additive manufacturing method for producing a three-dimensional metal object, said method comprising building a green body of metal particles and one of more metal precursors using the slurry according to the invention, removing organic binder from the green body to obtain a brown body, and optionally converting any remaining metal precursor to the corresponding metal to obtain a three-dimensional metal object. In another aspect, the invention relates to a three-dimensional metal object obtainable by the method of the invention and to the use of the three-dimensional metal object as a catalyst or catalyst support.
B22F 1/00 - Metallic powderTreatment of metallic powder, e.g. to facilitate working or to improve properties
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor
a) of the foil substrate (2), wherein a cured resin layer (6) represents a cross sectional slice of a three dimensional object (12). A stage (9) is configured to hold a stacked arrangement of one or more cured resin layers representing at least in part the three dimensional object (12), and a positioning system is provided for relative positioning the foil substrate (2) and the stage (9). A resin conditioning unit (16) is provided upstream from the input resin storage unit (5).
B29C 64/129 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
B29C 64/124 - Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
The present invention relates to a radiation-curable slurry for additive manufacturing of three-dimensional metal objects, said slurry comprising: a) 2-45 wt% of a polymerizable resin; b) 0.001-10 wt% of one or more polymerization photoinitiators; c) 55-98 wt% of metal precursor particles; with the proviso that the metal precursor is not AI2O3 or Zr02. The invention further relates to an additive manufacturing method for producing a three- dimensional metal object, said method comprising building a green body of metal precursor particles using the slurry according to the invention, removing organic binder from the green body to obtain a metal precursor brown body, converting the metal precursor brown body to a metal brown body and sintering the metal brown body to obtain a three-dimensional metal object. In a third aspect, the invention relates to a three-dimensional metal object obtainable by the method of the invention.
B22F 1/00 - Metallic powderTreatment of metallic powder, e.g. to facilitate working or to improve properties
B22F 3/00 - Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sinteringApparatus specially adapted therefor
Additive manufacturing device for manufacturing a three dimensional object, having a foil substrate (2) and a resin depositor (4) for depositing a layer of curable resin (6) on a first side (2a) of the foil substrate (2), wherein the resin depositor (4) comprises an input side resin storage unit (5). A radiation source (10) is present for radiation curing the resin layer (6) on the first side (2a) of the foil substrate (2), wherein a cured resin layer (6) represents a cross sectional slice of a three dimensional object (12). A stage (9) is configured to hold a stacked arrangement of one or more cured resin layers representing at least in part the three dimensional object (12), and a positioning system is provided for relative positioning the foil substrate (2) and the stage (9). A resin conditioning unit (16) is provided upstream from the input resin storage unit (5).
Additive manufacturing system for manufacturing a three dimensional object (10). A resin depositor (14) is present for depositing a layer of curable resin (6) on a first side (2a) of a foil substrate (2). The foil substrate (2) is supported by a transparent support plate (4), and a radiation source (5) is disposed for radiation curing the resin layer (6). A stage (12) is configured to hold a stacked arrangement of one or more cured resin layers representing at least in part the three dimensional object (10) and a positioning system is provided for relative positioning the foil substrate (2) and the stage (12). A masking screen (8) disposed substantially parallel to the resin layer (6) is present for blocking at least in part incident radiation on the resin layer (6) in correspondence with a cross sectional slice of the object (10).
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