公开(公告)号：US20210403750A1

公开(公告)日：2021-12-30

申请号：US17052603

申请日：2019-03-18

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

Inventor： Adekunle Olubummo ,  Kyle Wycoff ,  Aja Hartman ,  Lihua Zhao

IPC: C09D177/02 ,  B33Y10/00 ,  B33Y70/00 ,  B29C64/165 ,  C08K3/04 ,  C08K5/00

Abstract: The present disclosure is drawn to multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of making three-dimensional printed articles. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent, a first reactive agent, and a second reactive agent. The fusing agent can include water and a radiation absorber. The first reactive agent can include a first liquid vehicle and an epoxy compound having multiple epoxide groups. The second reactive agent can include a second liquid vehicle and an amine compound having multiple amino groups.

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：US20210354375A1

公开(公告)日：2021-11-18

申请号：US17047723

申请日：2019-04-29

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

Inventor： Adekunle Olubummo ,  Kyle Wycoff ,  Aja Hartman ,  Lihua Zhao

IPC: B29C64/165 ,  B29C64/268 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00

Abstract: In an example of a method for three-dimensional (3D) printing, a build material composition is applied to form a build material layer. The build material composition includes a polyamide. The polyamide is selectively melted, based on a 3D object model, in at least a portion of the build material layer to form a molten portion including molten polyamide. An epoxy agent is selectively applied, based on the 3D object model, on the molten portion of the build material layer. The epoxy agent includes a polyfunctional epoxy, which crosslinks the molten polyamide in the molten portion.

公开(公告)号：US20210284858A1

公开(公告)日：2021-09-16

申请号：US16488662

申请日：2017-10-24

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

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

IPC: C09D11/38 ,  C09D11/033 ,  C07F15/04 ,  B33Y70/00 ,  B33Y40/10 ,  B29C64/314

Abstract: An example of a fusing agent includes a metal bis(dithiolene) salt, a polar aprotic solvent, and a balance of water. An example of a method for making an example of the fusing agent includes adding a metal bis(dithiolene) salt into a liquid vehicle including at least a polar aprotic solvent and water.

公开(公告)号：US20210138725A1

公开(公告)日：2021-05-13

申请号：US16605140

申请日：2018-03-15

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

Inventor： Kristopher J Erickson ,  Paul Olubummo ,  Aja Hartman ,  Lihua Zhao

IPC: B29C64/165 ,  B29C64/291 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00 ,  C08K3/04

Abstract: A three-dimensional printing system can include polymeric build material and jettable fluid(s). The polymeric build material can have an average particle size from 20 μm to 150 μm, a first melt viscosity, and a melting temperature from 75° C. to 350° C. In one example, the jettable fluid can include water, from 0.1 wt % to 10 wt % of electromagnetic radiation absorber, and from 10 wt % to 35 wt % of an organic solvent plasticizer. Contacting a first portion of a layer of the polymeric build material with the jettable fluid can provide an organic solvent plasticizer loading from 2 wt % to 10 wt % based on the polymeric build material content. The first melt viscosity of the polymeric build material at the first portion can be reduced and the melting temperature of the polymeric build material at the first portion can be decreased by 3° C. to 15° C.

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：US10832394B2

公开(公告)日：2020-11-10

申请号：US16098061

申请日：2016-07-29

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

Inventor： Aja Hartman ,  Lihua Zhao

IPC: B33Y30/00 ,  B33Y50/02 ,  B33Y99/00 ,  G01N21/88 ,  G06T7/00 ,  G01N21/95 ,  B29C64/393 ,  B29C64/30 ,  G01N21/64 ,  B29C64/165

Abstract: According to an example, an apparatus may include an image capture device, a controller, and a computer readable storage medium. The computer readable storage medium may include instructions that may cause the controller to receive, from the image capture device, an image of a testing agent deposited in a testing pattern onto a layer of build materials, in which the layer of build materials is to form a section of a three-dimensional printed part. The instructions may also cause the controller to determine a condition of the deposited testing pattern in the received image, wherein the determined condition is to be used to determine a quality level of the layer of build materials based upon the determined condition.

公开(公告)号：US20190030803A1

公开(公告)日：2019-01-31

申请号：US16072144

申请日：2016-05-05

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

Inventor： Krzysztof Nauka ,  Vladek Kasperchik ,  Aja Hartman

IPC: B29C64/188 ,  B29C64/153 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02

Abstract: According to an example, in a method, a radiation source that is to output radiation at a preset energy level onto a surface of a three-dimensional (3D) printed object may be activated. In addition, the radiation source may be deactivated after a predefined period of time sufficient to cause an outer portion of about a predetermined thickness of the surface of the 3D printed object to begin to melt to finish the surface of the 3D printed object.

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：US20240269922A1

公开(公告)日：2024-08-15

申请号：US18569598

申请日：2021-06-24

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

Inventor： Aja Hartman ,  Michelle Niu ,  Adekunle Olubummo ,  Kyle Wycoff ,  Krzysztof Nauka ,  Emre Hiro Discekici

IPC: B29C64/165 ,  B29C64/188 ,  B29C64/264 ,  B29D11/00 ,  B29K21/00 ,  B29K77/00 ,  B29K105/00 ,  B29L11/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/20 ,  B33Y70/00 ,  B33Y80/00

CPC classification number: B29C64/165 ,  B29C64/188 ,  B29C64/264 ,  B29D11/00451 ,  B29D11/00923 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/20 ,  B33Y70/00 ,  B33Y80/00 ,  B29K2021/003 ,  B29K2077/00 ,  B29K2105/0032 ,  B29K2105/251 ,  B29K2995/0012 ,  B29K2995/0088 ,  B29L2011/0016

Abstract: A three-dimensional printing kit for forming lens elements can include a build material including from about 80 wt % to 100 wt % thermoplastic polyamide elastomeric particles having a D50 particle size from about 10 μm to about 150 μm, and a fusing agent including a liquid vehicle and from about 0.5 wt % to about 20 wt % of a UV radiation absorber.