公开(公告)号：US11426927B2

公开(公告)日：2022-08-30

申请号：US16075675

申请日：2017-07-31

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

Inventor： David R. Otis, Jr. ,  Kevin E. Swier ,  Justin M. Roman ,  Wesley R. Schalk

IPC: B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/329 ,  B29C64/336 ,  B29C64/153 ,  B29C64/357

Abstract: Example implementations relate to different mixtures of build materials deliverable during a three dimensional (3D) print operation. In some examples, a 3D print apparatus may include a delivery hopper to deliver build material to a print zone of the 3D print apparatus and a plurality of build material hoppers to which the delivery hopper is connected for receipt of at least one of a corresponding plurality of build materials. A controller of the 3D print apparatus may direct that variable proportions of a first build material relative to a second build material are receivable by the delivery hopper from the plurality of build material hoppers during the 3D print operation, where different mixtures of the variable proportions of the first build material and the second build material are deliverable to the delivery hopper during the 3D print operation.

公开(公告)号：US20240293861A1

公开(公告)日：2024-09-05

申请号：US18575195

申请日：2021-07-09

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

Inventor： David R. Otis, Jr. ,  Vladek Kasperchik ,  Mohammed Shaarawi

IPC: B22F1/14 ,  B22F1/052 ,  B22F1/065 ,  B22F10/14 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/10

CPC classification number: B22F1/14 ,  B22F1/052 ,  B22F1/065 ,  B22F10/14 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/10

Abstract: Methods of preparing a particulate build material for three-dimensional printing can include loading fresh particulate build material including from about 80 wt % to 100 wt % fresh metal particles into a mechanical mixer, and mechanically conditioning the fresh particulate build material to generate conditioned particulate build material including conditioned metal particles. The fresh metal particles can have a surface oxide layer, and the fresh particulate build material can have a particle size distribution with a D10 particle size from about 2 μm to about 10 μm, a D50 particle size from about 5 μm to about 20 μm, and a D90 particle size from about 20 μm to about 40 μm. The conditioned particulate build material can include a modified cohesive index (compared to the fresh conditioned particulate build material) ranging from about 25 cohesive index units to about 35 cohesive index units.

公开(公告)号：US11904548B2

公开(公告)日：2024-02-20

申请号：US16608854

申请日：2017-11-30

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

Inventor： David R. Otis, Jr. ,  Kevin E. Swier ,  Adam Peter Franks

IPC: B29C64/321 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/357 ,  B29C64/153 ,  B29C64/336 ,  B33Y40/00 ,  B22F10/73 ,  B22F12/52 ,  B22F12/55 ,  B22F12/58 ,  B22F12/90 ,  B29K105/26

CPC classification number: B29C64/321 ,  B22F10/73 ,  B22F12/52 ,  B22F12/55 ,  B22F12/58 ,  B22F12/90 ,  B29C64/153 ,  B29C64/336 ,  B29C64/357 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B29K2105/26 ,  B22F2999/00 ,  B22F10/34 ,  B22F12/90 ,  B22F12/58

Abstract: A varying a composition of build material used for a three dimensional (3D) part formed by a 3D printer are disclosed. In a system provided, a number of vessels for build material are included, wherein each vessel includes a feeder coupled to a conveying system. The conveying system conveys and blends build material from the vessels. A controller is configured to adjust a composition of the build material by adjusting an amount of material added from each of the vessels by controlling the feeder on each of the vessels.

公开(公告)号：US20200282652A1

公开(公告)日：2020-09-10

申请号：US16608935

申请日：2017-11-11

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

Inventor： David R. Otis, Jr. ,  Kevin E. Swier ,  Jeffrey L. Thielman

IPC: B29C64/321 ,  B65G53/10 ,  B65G53/66

Abstract: In one example, a pneumatic transport system to transport build material in an additive manufacturing machine includes a conduit, a source of air pressure to pull or push a stream of air through the conduit, a source of build material to introduce a build material into the stream of air, a separator to remove build material from the stream of air, a flow meter downstream from the separator to measure the stream of air flowing through the conduit, and a controller operatively connected to the flow meter and to the source of air pressure and/or the sources of build material to, based on a measurement from the flow meter, adjust a rate of flow of the stream of air in the conduit.

公开(公告)号：US20230091752A1

公开(公告)日：2023-03-23

申请号：US17802832

申请日：2020-07-28

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

Inventor： David R. Otis, Jr. ,  Kevin E. Swier ,  Michael G. Monroe ,  Daniel Mosher ,  Douglas Pederson

IPC: B29C64/214 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/141 ,  B29C64/165 ,  B29C64/393 ,  B33Y50/02

Abstract: A 3D printer is disclosed herein. The 3D printer comprises a build material distributor to generate layers of a build material in a spreading direction along a spreading axis; a resonator mounted on the build material distributor to vibrate the build material distributor along the spreading axis at a frequency; and a controller. The controller is to control the resonator to vibrate the build material distributor at the frequency while controlling the build material distributor to spread a volume of build material over a platform to generate a layer of build material.

公开(公告)号：US10343398B2

公开(公告)日：2019-07-09

申请号：US15896292

申请日：2018-02-14

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

Inventor： Jeffrey A. Nielsen ,  Craig Olbrich ,  Richard W. Seaver ,  David R. Otis, Jr.

IPC: B41J2/14 ,  B41J2/16

Abstract: An inkjet material dispenser system includes a printhead member. According to one exemplary embodiment, the printhead member includes at least one drop ejector including an insulating stack layer and a top orifice surface defining an orifice, wherein a ratio of a diameter of the orifice to a height of the insulating stack layer (O/L ratio) is at least 1.0.