公开(公告)号：US11167510B2

公开(公告)日：2021-11-09

申请号：US16075671

申请日：2017-02-28

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

Inventor： Krzysztof Nauka ,  Andrew E. Fitzhugh ,  Lihua Zhao

IPC: B29C71/04 ,  B29C64/393 ,  B29C64/118 ,  B33Y50/00 ,  B29C64/386 ,  B29C64/30 ,  B29C35/08 ,  B29C59/16 ,  B33Y50/02 ,  B33Y40/20

Abstract: According to examples, an apparatus includes a processor and a memory on which is stored machine readable instructions. The instructions may cause the processor to identify an intended surface property level for a surface of a three-dimensional (3D) object, determine an amount of radiation to be applied as a flash of radiation onto the surface to obtain the intended surface property level, and output the determined amount of radiation to be applied as a flash of radiation, in which a radiation source is to flash apply the determined amount of radiation onto the surface of the 3D object.

公开(公告)号：US20210046700A1

公开(公告)日：2021-02-18

申请号：US16978869

申请日：2018-04-27

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

Inventor： Kristopher J. Erickson ,  Anthony McLennan ,  Lihua Zhao

IPC: B29C64/188 ,  B29C64/264

Abstract: An example system includes a three-dimensional (3D) printer to generate a 3D object and a surface feature formation arrangement to receive the 3D object. The 3D object has at least one surface with a layer of at least partly uncured material. The surface feature formation arrangement includes a controller and a heat source. The controller is to operate the heat source to selectively apply heat to the at least one surface of the 3D object. The heat from the heat source is to transform the at least partly uncured material to form a selected feature on the at least one surface.

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.

公开(公告)号：US10781228B2

公开(公告)日：2020-09-22

申请号：US16079361

申请日：2017-02-06

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

Inventor： Adekunle Olubummo ,  Lihua Zhao ,  Aja Hartman ,  Howard S. Tom ,  Kristopher J. Erickson

IPC: C07F15/04 ,  C07C321/18 ,  B29C64/165 ,  C07F15/00 ,  B33Y70/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/393

Abstract: An example of a fusing agent includes a metal bis(dithiolene) complex, a thiol surfactant, a polar aprotic solvent, and a balance of water. In an example of a method of making the fusing agent, the metal bis(dithiolene) complex is exposed to an aqueous solution including a reducing agent and a thiol surfactant to form a reduced metal bis(dithiolene) complex and to dissolve the reduced metal bis(dithiolene) complex in the aqueous solution. The aqueous solution is incorporated into a vehicle including a water soluble organic solvent and an additive selected from the group consisting of an emulsifier, a surface tension reduction agent, a wetting agent, a scale inhibitor, an anti-deceleration agent, a chelating agent, an antimicrobial agent, and a combination thereof. The fusing agent may be utilized in a three-dimensional printing method and/or incorporated into a three-dimensional printing system.

公开(公告)号：US20190351607A1

公开(公告)日：2019-11-21

申请号：US16462679

申请日：2017-02-14

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

Inventor： Wei Huang ,  Lihua Zhao ,  Gary J. Dispoto

IPC: B29C64/10 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y80/00 ,  B29C70/70 ,  B29C70/88 ,  G01N27/04

Abstract: According to an example, a three-dimensional (3D) printed object may include a body formed of an electrically non-conductive material. In addition, an electrically conductive channel, a sensing device, and a signal emitter may be embedded within the body. The sensing device may be in electrical communication with the electrically conductive channel such that the sensing device is affected by a disruption in a current applied through the electrically conductive channel. In addition, the signal emitter may emit a wireless signal in response to the sensing device being affected by a disruption in the applied current.

公开(公告)号：US20190047215A1

公开(公告)日：2019-02-14

申请号：US16071018

申请日：2016-04-11

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

Inventor： Ning Ge ,  James Elmer Abbott, Jr. ,  Steven J Simske ,  Paul J Benning ,  Lihua Zhao

IPC: B29C64/165 ,  B22F3/105 ,  B28B1/00 ,  B22F1/02 ,  B33Y30/00 ,  B33Y70/00

Abstract: The present disclosure is drawn to a particulate build material for three-dimensional printing. The particulate build material can include a plurality of particulates, wherein individual particulates include a particulate core having a photosensitive coating applied to a surface of the particulate core. The particulate core includes a metal, a ceramic, or both a metal and a ceramic. The photosensitive coating includes a polymer having a photosensitive agent suspended or attached therein.

公开(公告)号：US20190030800A1

公开(公告)日：2019-01-31

申请号：US16073256

申请日：2016-05-12

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

Inventor： Stephen G. Rudisill ,  Alexey S Kabalnov ,  Kristopher J. Erickson ,  Howard S Tom ,  Lihua Zhao

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y50/02 ,  B33Y70/00 ,  B22F3/00

Abstract: In an example of a three-dimensional (3D) printing method, a crystalline or semi-crystalline build material is applied. A temperature of the crystalline or semi-crystalline build material is maintained within 100° C. below a melting point of the crystalline or semi-crystalline build material. A melt flow property reduction agent is applied to at least a portion of the crystalline or semi-crystalline build material, and the at least the portion of the crystalline or semi-crystalline build material in contact with the melt flow property reduction agent melts or coalesces at the temperature.

公开(公告)号：US20190030797A1

公开(公告)日：2019-01-31

申请号：US16072169

申请日：2016-05-17

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

Inventor： Ning Ge ,  Paul J. Benning ,  Lihua Zhao ,  Steven J. Simske ,  Chandrakant Patel

IPC: B29C64/165 ,  B29C64/393 ,  B29C64/336 ,  B29C64/245 ,  B29C64/295

Abstract: According to an example, a three-dimensional (3D) printer may include a first delivery device to selectively deposit a fusing agent onto a layer of build materials and a second delivery device to deposit coolant droplets at tuned drop weights onto the layer of build materials. The 3D printer may also include a controller to control the second delivery device to selectively deposit the coolant droplets at the tuned drop weights onto selected areas of the build material layer, in which the drop weights of the selectively deposited coolant droplets are tuned to provide a thermal balance between multiple areas of the build material layer during application of fusing radiation onto the build material layer.

公开(公告)号：US20180273720A1

公开(公告)日：2018-09-27

申请号：US15763359

申请日：2015-10-09

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

Inventor： Wei Huang ,  Lihua Zhao ,  Yan Zhao ,  Jun Zeng

IPC: C08K3/16 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/165

CPC classification number: C08K3/16 ,  B29C64/153 ,  B29C64/165 ,  B29C64/188 ,  B29K2077/10 ,  B33Y10/00 ,  B33Y70/00 ,  C08K3/10 ,  C08K2003/166 ,  C08K2201/005 ,  C08L101/00 ,  C08L77/02

Abstract: The present disclosure is drawn to particulate mixtures, material sets and methods of forming porous 3-dimensional printed parts. The particulate mixtures can include 5 wt % to 40 wt % of a salt having an average particle size from 5 μm to 100 μm. The mixture can also include 60 wt % to 95 wt % of a build material for 3-dimensional printing. The build material can include a particulate polymer having an average particle size from 5 μm to 100 μm and a melting point from 100° C. to 400° C. The melting point of the particulate polymer can be lower than the melting point of the salt.

公开(公告)号：US20180015663A1

公开(公告)日：2018-01-18

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 ,  B33Y50/02 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/291 ,  B29C64/393

CPC classification number: B29C64/165 ,  B22F3/1055 ,  B22F2003/1056 ,  B22F2003/1057 ,  B29C64/291 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  Y02P10/295

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.