公开(公告)号：US20210197455A1

公开(公告)日：2021-07-01

申请号：US16077752

申请日：2017-07-14

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Shannon Reuben WOODRUFF ,  Ali EMAMJOMEH ,  Yi FENG ,  Erica FUNG ,  Carolin FLEISCHMANN ,  Geoffrey SCHMID

IPC: B29C64/165 ,  B33Y70/00

Abstract: This disclosure relates to a method of 3-D printing comprising: applying a layer of build material onto a print platform, wherein the build material comprises particles of a polymer comprising polymer chains having at least one reactive group that is protected with a protecting group; printing a de-protecting agent at selected locations on the layer of build material; and coalescing particles of the polymer at the printed locations on the layer of build material to form a coalesced polymer layer.

公开(公告)号：US20230384761A1

公开(公告)日：2023-11-30

申请号：US18032988

申请日：2020-10-29

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： James Andrew MCCUTCHEON ,  Alberto Maria CANALS POU ,  Geoffrey SCHMID

IPC: G05B19/4099

CPC classification number: G05B19/4099 ,  G05B2219/35134

Abstract: In some examples, a system defines sub-volumes within a bounding object based on beams of a unit cell of a lattice structure for a 3D object to be built. The sub-volumes are defined based on the beams cutting through the bounding object that contains the unit cell. The system intersects the sub-volumes of the bounding object with a trimmed version of the lattice structure. The system forms a surface lattice structure having beams identified based on the intersecting, the beams of the surface lattice structure to connect to unit cells of the trimmed version of the lattice structure.

公开(公告)号：US20240017494A1

公开(公告)日：2024-01-18

申请号：US18031292

申请日：2020-10-19

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Edward Stanley PONOMAREV ,  Stephan Walter EMMENEGGER ,  Geoffrey SCHMID

IPC: B29C64/35 ,  B08B1/04 ,  B08B5/02 ,  B29C64/379 ,  B08B5/04

CPC classification number: B29C64/35 ,  B08B1/04 ,  B08B5/023 ,  B29C64/379 ,  B08B5/043 ,  B33Y40/20

Abstract: In one example, a process for depowdering an elastic object made with a 3D printer using powdered build material includes compressing the object progressively from one end of the object to another end of the object.