公开(公告)号：WO2020159476A1

公开(公告)日：2020-08-06

申请号：PCT/US2019/015555

申请日：2019-01-29

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

Inventor： MONROE, Michael Gabriel ,  ROS ZUAZUA, Pedro

IPC: B29C64/165 ,  B29C64/188 ,  B29C64/393 ,  B29C64/35 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/295

Abstract: In one example, a memory having instructions thereon that when executed cause a 3D printing system to repeatedly form each of multiple successive layers of powdered build material on a platform and apply a functional agent to build material in each layer, create a pressure difference across a thickness of build material on the platform, and increase the pressure difference over an extent of build material on the platform as the build material on the platform gets thicker.

公开(公告)号：WO2022086564A1

公开(公告)日：2022-04-28

申请号：PCT/US2020/057173

申请日：2020-10-23

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

Inventor： MONROE, Michael Gabriel ,  SOLE PONS, Macia ,  SWIER, Kevin Edward

IPC: B29C64/205 ,  B29C64/321 ,  B33Y30/00 ,  B33Y40/00

Abstract: In one example, a device for dispensing build material powder in an additive manufacturing machine includes a first dispenser including a first scoop rotatable in a first direction to scoop build material powder into the first dispenser, a second dispenser including a second scoop rotatable in a second direction opposite the first direction to scoop build material powder into the second dispenser, and a leveler between the first dispenser and the second dispenser.

公开(公告)号：WO2020076295A1

公开(公告)日：2020-04-16

申请号：PCT/US2018/054931

申请日：2018-10-09

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

Inventor： VAN BROCKLIN, Andrew Lester ,  MONROE, Michael Gabriel

IPC: B29C64/35 ,  B29C64/393 ,  B33Y40/00 ,  B33Y50/02

Abstract: In one example, a system for depowdering an object printed with a powder based 3D printer includes a depowdering unit to remove powder from the printed object, a scanner, and a controller operatively connected to the scanner to, during depowdering the printed object, iteratively obtain scans of the printed object from the scanner and compare a scan to a 3D model of the object until a comparison is within a tolerance between the scan and the model.