公开(公告)号：US20220001627A1

公开(公告)日：2022-01-06

申请号：US17291295

申请日：2019-10-25

Applicant: dp polar GmbH

Inventor： Hans Mathea

IPC: B29C64/40 ,  B33Y10/00 ,  B33Y70/10 ,  B33Y40/20 ,  B29C64/35 ,  B29C64/336

Abstract: 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.

公开(公告)号：US20210379834A1

公开(公告)日：2021-12-09

申请号：US17410218

申请日：2021-08-24

Applicant: dp polar GmbH

Inventor： Hans Mathea

IPC: B29C64/393 ,  B29C64/112 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y10/00 ,  B29C64/245 ,  B29C64/209 ,  B29C64/241 ,  G05B19/4099 ,  G06K9/62

Abstract: 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.

公开(公告)号：US12017412B2

公开(公告)日：2024-06-25

申请号：US17604212

申请日：2020-04-16

Applicant: dp polar GmbH

Inventor： Hans Mathea

IPC: B29C64/277 ,  B29C64/241 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

CPC classification number: B29C64/277 ,  B29C64/241 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: 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.

公开(公告)号：US11958252B2

公开(公告)日：2024-04-16

申请号：US17604235

申请日：2020-04-17

Applicant: dp polar GmbH

Inventor： Hans Mathea

IPC: B29C64/393 ,  B29C64/241 ,  B29C64/277 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

CPC classification number: B29C64/393 ,  B29C64/241 ,  B29C64/277 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: In a method for producing at least one solid-body layer on a support that can be rotated about an axis of rotation, in accordance with predetermined geometry data, an emitter array having a plurality of emitters configured as material-dispensing nozzles is provided, which nozzles are arranged in emitter columns and emitter rows. Emitter columns that are adjacent to one another in the circumferential direction of an axis of rotation are offset from one another, in the expanse direction of the emitter columns, in each instance, in such a manner that the emitters are arranged at different radial distances DA(i) from the axis of rotation. It holds true that: DA(i) DA(i+1). Print dots are assigned to the geometry data, which dots are offset from one another, in a matrix having multiple rows that run next to one another, in such a manner that it holds true that: PA(j)>PA(j+1), wherein PA(j) is the radial distance of the jth print dot Pj of the row in question from the axis of rotation. For print dots Pk for which material is supposed to be dispensed onto the support, at least one material portion, in each instance, is dispensed from the emitter Dk of the emitter array assigned to the print dot Pk 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.

公开(公告)号：US20220379556A1

公开(公告)日：2022-12-01

申请号：US17775777

申请日：2020-11-17

Applicant: dp polar GmbH

Inventor： Hans Mathea

IPC: B29C64/188 ,  B33Y10/00 ,  B33Y50/02 ,  B33Y30/00 ,  B29C64/393

Abstract: 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.

公开(公告)号：US20220203623A1

公开(公告)日：2022-06-30

申请号：US17604235

申请日：2020-04-17

Applicant: DP POLAR GMBH

Inventor： Hans Mathea

IPC: B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/277 ,  B29C64/241

Abstract: In a method for producing at least one solid-body layer on a support that can be rotated about an axis of rotation, in accordance with predetermined geometry data, an emitter array having a plurality of emitters configured as material-dispensing nozzles is provided, which nozzles are arranged in emitter columns and emitter rows. Emitter columns that are adjacent to one another in the circumferential direction of an axis of rotation are offset from one another, in the expanse direction of the emitter columns, in each instance, in such a manner that the emitters are arranged at different radial distances DA(i) from the axis of rotation. It holds true that: DA(i) DA(i+1). Print dots are assigned to the geometry data, which dots are offset from one another, in a matrix having multiple rows that run next to one another, in such a manner that it holds true that: PA(j)>PA(j+1), wherein PA(j) is the radial distance of the jth print dot Pj of the row in question from the axis of rotation. For print dots Pk for which material is supposed to be dispensed onto the support, at least one material portion, in each instance, is dispensed from the emitter Dk of the emitter array assigned to the print dot Pk 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.