公开(公告)号：US11192306B2

公开(公告)日：2021-12-07

申请号：US15770476

申请日：2016-02-08

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

Inventor： Yan Zhao ,  Aja Hartman ,  Lihua Zhao

IPC: B29C64/393 ,  B33Y50/02 ,  B29C64/165 ,  B33Y10/00 ,  B33Y40/00

Abstract: Examples include an apparatus for generating a three-dimensional object. The apparatus comprises at least one energy source, at least one build layer temperature sensor, and a controller. The controller is to control the at least one energy source to pre-fuse a portion of a build layer in a build area when a build layer temperature is less than a first temperature threshold. The controller is further to, after pre-fusing the portion of the build layer, control the at least one energy source to fuse the portion of the build layer in the build area when the build layer temperature is less than a second threshold.

公开(公告)号：US10857733B2

公开(公告)日：2020-12-08

申请号：US16077753

申请日：2017-02-06

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

Inventor： Yan Zhao ,  Lihua Zhao ,  Paul Olubummo ,  Aja Hartman ,  Howard S. Tom

IPC: B29C64/268 ,  B29C64/165 ,  B29C64/291 ,  B29C64/393 ,  C09D11/50 ,  B33Y70/00 ,  B33Y10/00

Abstract: In an example of a three-dimensional (3D) printing method, a polymeric or polymeric composite build material is applied. A fusing agent is selectively applied on at least a portion of the polymeric or polymeric composite build material. The fusing agent includes a discolorable near-infrared absorbing dye, a thiol surfactant, a reducing agent, and a balance of water. Near-infrared radiation is applied to the polymeric or polymeric composite build material at a condition that maintains a temperature of the selectively applied fusing agent below a decomposition temperature of the fusing agent and that allows the discolorable near-infrared absorbing dye to harvest near-infrared radiation energy, in order to fuse the portion of the polymeric or polymeric composite build material in contact with the fusing agent to form a layer and to initiate discoloration of the discolorable near-infrared absorbing dye in the layer.

公开(公告)号：US10434708B2

公开(公告)日：2019-10-08

申请号：US15121730

申请日：2014-04-30

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

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

IPC: B29C67/04 ,  B33Y10/00 ,  B29C64/165 ,  B33Y30/00 ,  B33Y70/00 ,  B29K105/00

Abstract: In a 3D printing method, a sinterable material is applied and heated to a temperature ranging from about 50° C. to about 400° C. A coalescent agent is selectively applied on a portion of the sinterable material, and a modifying agent is selectively applied on the portion and/or on another portion of the sinterable material. The modifying agent consists of an inorganic salt, a surfactant, a co-solvent, a humectant, a biocide, and water. The sinterable material is exposed to radiation, whereby the coalescent agent at least partially cures the portion of the sinterable material in contact with the coalescent agent, and the modifying agent i) reduces curing of the portion of the sinterable material in contact with both the coalescent agent and the modifying agent ii) prevents curing of the other portion of the sinterable material in contact with the modifying agent, or iii) both i and ii.

公开(公告)号：US20190030788A1

公开(公告)日：2019-01-31

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: B29C64/112 ,  B29C64/264 ,  B33Y50/02 ,  B33Y10/00 ,  B33Y70/00

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：US20170247553A1

公开(公告)日：2017-08-31

申请号：US15507584

申请日：2014-09-26

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

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

IPC: C09D11/037 ,  C09D11/50 ,  B33Y70/00 ,  C09D11/033 ,  B29C67/00 ,  B33Y10/00

CPC classification number: C09D11/037 ,  B29C64/165 ,  B33Y10/00 ,  B33Y70/00 ,  C09D11/033 ,  C09D11/322 ,  C09D11/328 ,  C09D11/50

Abstract: The present disclosure is drawn to coalescent inks and material sets for 3D printing. The coalescent ink can include a water-soluble near-infrared dye having a peak absorption wavelength from 800 nm to 1400 nm. The coalescent ink can also contain water.

公开(公告)号：US20160312037A1

公开(公告)日：2016-10-27

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 ,  B33Y10/00 ,  B33Y30/00 ,  G06F17/50 ,  B33Y70/00 ,  B33Y50/00 ,  C09D177/02 ,  C08J3/12 ,  B29C67/00 ,  B33Y50/02

CPC classification number: C09D5/031 ,  B29C64/00 ,  B29C64/165 ,  B29C64/386 ,  B29C64/40 ,  B29K2077/00 ,  B29K2105/251 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B33Y50/02 ,  B33Y70/00 ,  C08J3/12 ,  C08J2377/02 ,  C08L77/02 ,  C08L77/06 ,  C08L101/00 ,  C08L2205/025 ,  C09D177/02 ,  G06F17/5009

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

Abstract translation: 用于三维印刷的聚合物粉末组合物包括第一，第二和第三聚合物颗粒。 具有第一平均尺寸的第一颗粒以约70重量％至约95重量％的量存在。 具有小于第一平均尺寸的第二平均尺寸的第二颗粒以约0.5重量％至约21重量％的量存在。 具有小于第二平均尺寸的第三平均尺寸的第三颗粒以大于0重量％至约21重量％的量存在。 第一，第二和第三平均尺寸中的每一个独立地在5μm至约100μm的范围内。 聚合物粉末组合物中所有聚合物颗粒的分数重量比的总和等于

公开(公告)号：US12202197B2

公开(公告)日：2025-01-21

申请号：US16735211

申请日：2020-01-06

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

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

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

Abstract: In one example, a non-transitory processor readable medium having instructions thereon that when executed cause an additive manufacturing machine to expose build material to a light source emitting monochromatic light within a band of wavelengths that includes a peak light absorption of a liquid coalescing agent to be dispensed on to the build material.

公开(公告)号：US11760010B2

公开(公告)日：2023-09-19

申请号：US17561425

申请日：2021-12-23

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

Inventor： Yan Zhao ,  Kristopher J. Erickson ,  Aja Hartman ,  Lihua Zhao ,  Sterling Chaffins ,  Kevin P. DeKam

IPC: B29C64/165 ,  B33Y10/00 ,  B29C64/112 ,  B29C64/393 ,  B33Y70/10 ,  B33Y70/00 ,  B33Y30/00 ,  B29C64/20 ,  B33Y50/02 ,  B29K77/00 ,  B29K105/00 ,  B29K105/16 ,  B29K505/14 ,  B29K507/04

CPC classification number: B29C64/165 ,  B29C64/112 ,  B33Y10/00 ,  B33Y70/00 ,  B33Y70/10 ,  B29C64/20 ,  B29C64/393 ,  B29K2077/00 ,  B29K2105/005 ,  B29K2105/0023 ,  B29K2105/0032 ,  B29K2105/162 ,  B29K2505/14 ,  B29K2507/04 ,  B29K2995/0005 ,  B33Y30/00 ,  B33Y50/02

Abstract: In an example method for forming three-dimensional (3D) printed electronic parts, a build material is applied. An electronic agent is selectively applied in a plurality of passes on a portion of the build material. A fusing agent is also selectively applied on the portion of the build material. The build material is exposed to radiation in a plurality of heating events. During at least one of the plurality of heating events, the portion of the build material in contact with the fusing agent fuses to form a region of a layer. The region of the layer exhibits an electronic property. An order of the plurality of passes, the selective application of the fusing agent, and the plurality of heating events is controlled to control a mechanical property of the layer and the electronic property of the region.

公开(公告)号：US20220118694A1

公开(公告)日：2022-04-21

申请号：US17561425

申请日：2021-12-23

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

Inventor： Yan Zhao ,  Kristopher J. Erickson ,  Aja Hartman ,  Lihua Zhao ,  Sterling Chaffins ,  Kevin P. DeKam

IPC: B29C64/165 ,  B33Y70/00 ,  B29C64/112 ,  B33Y10/00 ,  B29K105/00 ,  B29K505/14 ,  B29C64/393 ,  B29K77/00 ,  B29K105/16 ,  B33Y50/02 ,  B33Y30/00 ,  B29K507/04 ,  B29C64/20

Abstract: In an example method for forming three-dimensional (3D) printed electronic parts, a build material is applied. An electronic agent is selectively applied in a plurality of passes on a portion of the build material. A fusing agent is also selectively applied on the portion of the build material. The build material is exposed to radiation in a plurality of heating events. During at least one of the plurality of heating events, the portion of the build material in contact with the fusing agent fuses to form a region of a layer. The region of the layer exhibits an electronic property. An order of the plurality of passes, the selective application of the fusing agent, and the plurality of heating events is controlled to control a mechanical property of the layer and the electronic property of the region.

公开(公告)号：US10781323B2

公开(公告)日：2020-09-22

申请号：US15506572

申请日：2014-09-26

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

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

IPC: B29C67/00 ,  C09D11/102 ,  C09D11/037 ,  C09D11/033 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/165 ,  C09D11/322 ,  C09D11/328 ,  B29K105/00

Abstract: The present disclosure is drawn to coalescent inks and material sets for 3D printing. The coalescent ink can include an organic-soluble near-infrared dye having a peak absorption wavelength from 800 nm to 1400 nm. The coalescent ink can also include water and an organic co-solvent.