公开(公告)号：US20220362992A1

公开(公告)日：2022-11-17

申请号：US17878616

申请日：2022-08-01

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

Inventor： James Elmer Abbott, JR. ,  Alexander Govyadinov ,  Vladek Kasperchik ,  Krzysztof Nauka ,  Sivapackia Ganapathiappan ,  Lihua Zhao ,  Howard S. Tom ,  Yan Zhao ,  Hou T. Ng

IPC: B29C64/165 ,  B33Y30/00 ,  B29C64/291 ,  B29C64/277 ,  B29C64/264 ,  B29C64/268 ,  B29C35/08 ,  B29C67/00

Abstract: In one example, a lighting device for an additive manufacturing machine includes first light sources each to emit monochromatic light within a first band of wavelengths that includes a peak light absorption of a liquid coalescing agent and second light sources each to emit monochromatic light within a second band of wavelengths different from the first band of wavelengths. Each of the first light sources or each of multiple groups of the first light sources is individually addressable to emit monochromatic light independent of any other of the first light sources or of any other group of the first light sources and each of the second light sources or each of multiple groups of the second light sources is individually addressable to emit monochromatic light independent of any other of the second light sources or of any other group of the second light sources.

公开(公告)号：US11338507B2

公开(公告)日：2022-05-24

申请号：US15560422

申请日：2015-05-15

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

Inventor： Lihua Zhao ,  Yan Zhao ,  Hou T. Ng

IPC: B29C64/165 ,  B29C64/386 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/393 ,  B29C64/264 ,  B29C64/205

Abstract: In some examples, at least one agent distributor may be to selectively deliver mixtures of coalescing agent and carrier onto portions of a layer of build material at variable coalescing agent concentrations and variable contone densities. A controller may be to control the at least one agent distributor to selectively deliver the mixture to a portion of the layer at a selected coalescing agent concentration and a selected contone density.

公开(公告)号：US10814549B2

公开(公告)日：2020-10-27

申请号：US15545956

申请日：2015-04-30

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

Inventor： Lihua Zhao ,  Yan Zhao ,  Hou T. Ng

IPC: B29C64/153 ,  B33Y30/00 ,  B33Y10/00 ,  B29C64/165 ,  B33Y50/02 ,  B29C64/393 ,  B22F3/105 ,  B29C64/291 ,  B29C64/124

Abstract: In an example implementation, a method of printing a multi-structured three-dimensional (3D) object includes forming a layer of sinterable material. The method includes processing a first portion of the sinterable material using first set of processing parameters and processing a second portion of the sinterable material using a second set of processing parameters. The processed first and second portions form, respectively, parts of a first and second structure of a multi-structured 3D object.

公开(公告)号：US10807305B2

公开(公告)日：2020-10-20

申请号：US15565850

申请日：2015-06-02

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

Inventor： Yan Zhao ,  Hou T. Ng ,  Alejandro Manuel De Pena

IPC: B29C64/386 ,  B33Y50/00 ,  G05B19/4099 ,  B33Y10/00 ,  B33Y50/02 ,  B22F3/105 ,  B33Y30/00 ,  B29C64/153 ,  B29C64/165

Abstract: In one implementation, a system comprising a target engine, a thermal engine, and a sacrificial object engine is described. The target engine is to identify a target region of a build bed of a print device where a target object is to be located. The thermal engine is to identify a temperature level of the target region. The sacrificial object engine is to identify an object location to place a sacrificial object in response to a determination that the temperature level of the target region is deficient to achieve a temperature threshold for production.

公开(公告)号：US10696044B2

公开(公告)日：2020-06-30

申请号：US15509774

申请日：2014-09-30

Applicant: Hewlett-Packard Development Company, L.P. ,  Purdue Research Foundation

Inventor： Elias I. Franses ,  David S. Corti ,  Yung-Jih Yang ,  Hou T. Ng ,  Yan Zhao ,  Howard S. Tom

IPC: C09D11/322 ,  B41J2/01 ,  C09D11/037 ,  C09D11/38 ,  C09D11/326 ,  C09D11/033

Abstract: Provided in one example herein is an aqueous ink composition, including: pigment particles having at least one metal oxide; an aqueous medium; and a cationic double-chain surfactant consisting a quaternary ammonium salt. Methods of making and using the ink composition are also provided.

公开(公告)号：US10675812B2

公开(公告)日：2020-06-09

申请号：US15545931

申请日：2015-04-30

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

Inventor： Lihua Zhao ,  Yan Zhao ,  Hou T. Ng

IPC: B29C64/165 ,  B33Y30/00 ,  B33Y10/00 ,  B22F3/105 ,  B33Y50/02 ,  B29C64/393 ,  B29C64/291

Abstract: In an example implementation, a method of three-dimensional (3D) printing includes applying a sinterable material, selectively applying a fusing agent on a portion of the sinterable material, applying a first amount of radiation energy to the portion of the sinterable material, and applying a second amount of radiation energy to the portion of the sinterable material different than the first amount of radiation energy.

公开(公告)号：US10647053B2

公开(公告)日：2020-05-12

申请号：US16072123

申请日：2016-05-12

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

Inventor： Kristopher J. Erickson ,  Lihua Zhao ,  Howard S. Tom ,  Aja Hartman ,  Yan Zhao ,  Andrew E. Fitzhugh

IPC: B27N5/00 ,  B29C41/22 ,  B29C67/04 ,  B29C70/28 ,  B29C71/04 ,  B29C64/112 ,  B33Y70/00 ,  B33Y10/00 ,  B33Y50/02 ,  B29C67/00 ,  B29C64/165 ,  B29C64/264

Abstract: In an example of a three-dimensional (3D) printing method, a polymeric build material is applied. A fusing agent is selectively applied on at least a portion of the polymeric build material. A mechanical tailoring agent is selectively applied on at least a region of the portion. The polymeric build material is exposed to radiation, thereby fusing the at least the portion of the polymeric build material in contact with the fusing agent to form a layer. The mechanical tailoring agent forms a composite layer in the at least the region, and the composite layer has a different mechanical property than that of an area of the layer not in contact with the mechanical tailoring agent.

公开(公告)号：US10544311B2

公开(公告)日：2020-01-28

申请号：US15100603

申请日：2014-01-29

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

Inventor： Lihua Zhao ,  Sivapackia Ganapathiappan ,  Yan Zhao ,  Krzysztof Nauka ,  Howard S. Tom ,  Hou T. Ng

IPC: C09D5/03 ,  C08L101/00 ,  C08L77/02 ,  C08L77/06 ,  B29C64/40 ,  B29C64/386 ,  B29C64/165 ,  B29C64/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B33Y50/02 ,  B33Y70/00 ,  C08J3/12 ,  C09D177/02 ,  G06F17/50 ,  B29K77/00 ,  B29K105/00

Abstract: A polymeric powder composition for three-dimensional printing includes first, second, and third polymeric particles. The first particles, having a first average size, are present in an amount ranging from about 70 wt % to about 95 wt %. The second particles, having a second average size smaller than the first average size, are present in an amount ranging from about 0.5 wt % to about 21 wt %. The third particles, having a third average size smaller than the second average size, are present in an amount ranging from greater than 0 wt % up to about 21 wt %. Each of the first, second, and third average sizes independently ranges from 5 μm to about 100 μm. A sum of the fractional weight ratios of all of the polymeric particles in the polymeric powder composition equals 1.

公开(公告)号：US10518473B2

公开(公告)日：2019-12-31

申请号：US15564393

申请日：2015-07-31

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

Inventor： Wei Huang ,  Jun Zeng ,  Yan Zhao ,  Scott White ,  Sebastia Cortes I Herms

IPC: B29C64/386 ,  B29C64/171 ,  B33Y10/00 ,  B33Y50/02 ,  G05B19/4099

Abstract: According to an example, an arrangement of parts to be printed in a build envelope of a three dimensional (3D) printer may be determined through identification of a plurality of parts to be printed and generation of a respective virtual bounding box for each of the plurality of parts. In one example, a determination may be made that a total volume occupied by the generated virtual bounding boxes falls below a predetermined threshold of the build envelope volume and an arrangement of the virtual bounding boxes inside the build envelope that results in a total height of the virtual bounding boxes being minimized may be determined, to enhance efficiency in printing of the plurality of parts by the 3D printer.

公开(公告)号：US09981857B2

公开(公告)日：2018-05-29

申请号：US15816930

申请日：2017-11-17

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

Inventor： Yan Zhao ,  Howard S. Tom ,  Hou T. Ng

IPC: C01G23/053 ,  C09D11/023 ,  C09D11/102 ,  C09D11/322 ,  C09D17/00 ,  C09D7/12 ,  C09D5/02 ,  C09C1/36 ,  C09C1/00 ,  C08K3/22

CPC classification number: C01G23/053 ,  C01G23/0532 ,  C01P2004/01 ,  C01P2004/34 ,  C01P2004/62 ,  C01P2006/11 ,  C08K2003/2241 ,  C09C1/00 ,  C09C1/3676 ,  C09D5/028 ,  C09D7/61 ,  C09D11/023 ,  C09D11/102 ,  C09D11/322 ,  C09D17/00 ,  C09D17/008

Abstract: A method for manufacturing low effective density TiO2 includes providing a template having a surface. The template surface is coated with a titanium-containing compound that can be reduced to TiO2 at high temperature. The template is removed, thereby forming porous TiO2 particles. The effective density of the porous TiO2 particles is less than 4.