公开(公告)号：WO2020243522A1

公开(公告)日：2020-12-03

申请号：PCT/US2020/035253

申请日：2020-05-29

Applicant: EVOLVE ADDITIVE SOLUTIONS, INC. ,  STELTER, Eric Carl

Inventor： STELTER, Eric Carl ,  BATCHELDER, J. Samuel

IPC: B29C64/124 ,  B29C64/223 ,  B29C64/40 ,  B29C64/227 ,  B29C64/364 ,  B29C64/295 ,  B33Y70/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y40/20

Abstract: 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.

公开(公告)号：WO2020236610A1

公开(公告)日：2020-11-26

申请号：PCT/US2020/033175

申请日：2020-05-15

Applicant: EVOLVE ADDITIVE SOLUTIONS, INC. ,  FARAH, Zeiter

Inventor： FARAH, Zeiter ,  BATCHELDER, J. Samuel ,  BOORUGU, Manish

IPC: B29C64/393 ,  B29C64/176 ,  B29C64/194 ,  B29C64/295 ,  B29C64/245 ,  B29C67/00 ,  B33Y10/00 ,  B33Y40/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: 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 the n layers, transfusing m layers according to the second control parameter profile.

公开(公告)号：WO2021081320A1

公开(公告)日：2021-04-29

申请号：PCT/US2020/057053

申请日：2020-10-23

Applicant: EVOLVE ADDITIVE SOLUTIONS, INC.

Inventor： BATCHELDER, J. Samuel

IPC: G03G21/20 ,  G03G15/22 ,  B29C64/20 ,  B33Y30/00

Abstract: 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.

公开(公告)号：WO2021003166A1

公开(公告)日：2021-01-07

申请号：PCT/US2020/040317

申请日：2020-06-30

Applicant: EVOLVE ADDITIVE SOLUTIONS, INC.

Inventor： BATCHELDER, J. Samuel

IPC: B29C64/124 ,  B29C64/218 ,  B29C64/295 ,  B29C64/307 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00

Abstract: 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.

公开(公告)号：WO2022015961A1

公开(公告)日：2022-01-20

申请号：PCT/US2021/041797

申请日：2021-07-15

Applicant: EVOLVE ADDITIVE SOLUTIONS, INC.

Inventor： FARAH, Zeiter ,  BATCHELDER, J. Samuel ,  BOORUGU, Manish ,  MULLEN, Brian ,  KOSSETT, Alex J.

IPC: B29C64/218 ,  B29C64/295 ,  B29C64/227 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: 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.

公开(公告)号：WO2020051412A1

公开(公告)日：2020-03-12

申请号：PCT/US2019/049881

申请日：2019-09-06

Applicant: EVOLVE ADDITIVE SOLUTIONS, INC. ,  CHOWDRY, Arun ,  COMB, James W. ,  COUNTS, Chris ,  BATCHELDER, J. Samuel

Inventor： CHOWDRY, Arun ,  COMB, James W. ,  COUNTS, Chris ,  BATCHELDER, J. Samuel

IPC: B29C64/147 ,  B29C64/218 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00

Abstract: 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.

公开(公告)号：WO2019028033A1

公开(公告)日：2019-02-07

申请号：PCT/US2018/044618

申请日：2018-07-31

Applicant: EVOLVE ADDITIVE SOLUTIONS, INC.

Inventor： CHILLSCYZN, Steven, A. ,  CHOWDRY, Arun ,  BATCHELDER, J. Samuel

IPC: G03G15/16 ,  G03G15/22 ,  B29C64/00

CPC classification number: G03G15/225 ,  B29C64/147 ,  B29C64/241 ,  B29C64/268 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  G03G15/1625 ,  G03G15/224 ,  G03G15/24 ,  G03G2215/1695

Abstract: 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

公开(公告)号：WO2021067450A1

公开(公告)日：2021-04-08

申请号：PCT/US2020/053563

申请日：2020-09-30

Applicant: EVOLVE ADDITIVE SOLUTIONS, INC.

Inventor： BATCHELDER, J. Samuel ,  BOORUGU, Manish ,  RICE, Andrew

IPC: B29C64/147 ,  G03G15/22 ,  B29C64/295 ,  B33Y10/00 ,  B33Y30/00

Abstract: 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.

公开(公告)号：WO2021003165A1

公开(公告)日：2021-01-07

申请号：PCT/US2020/040316

申请日：2020-06-30

Applicant: EVOLVE ADDITIVE SOLUTIONS, INC.

Inventor： BATCHELDER, J. Samuel

IPC: B29C64/135 ,  B29C64/245 ,  B29C64/268 ,  B29C64/393 ,  B33Y10/00 ,  B33Y40/00 ,  B33Y50/02

Abstract: 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.