公开(公告)号：US20190054702A1

公开(公告)日：2019-02-21

申请号：US16077320

申请日：2017-01-18

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

Inventor： Aja HARTMAN ,  Lihua ZHAO

IPC: B29C64/393 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  G01N25/72

Abstract: In one example, an additive manufacturing process includes: making an object slice by slice, including dispensing a first quantity of each of multiple liquid functional agents on to a layer of fusable build material and then irradiating the layer of build material; while making the object, identifying a deviant region in a slice; and dispensing a second quantity different from the first quantity of at least one of the functional agents into a location corresponding to the deviant region.

公开(公告)号：US20210197445A1

公开(公告)日：2021-07-01

申请号：US16080221

申请日：2017-06-28

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

Inventor： Paul OLUBUMMO ,  Kristopher J. ERICKSON ,  Aja HARTMAN ,  Lihua ZHAO

IPC: B29C64/124 ,  B29C64/218 ,  B29C64/314 ,  B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/10 ,  B33Y70/00

Abstract: In an example, a three-dimensional (3D) printed part comprises a plurality of fused build material layers including exterior layers and interior layers. At least some of the interior layers include a composite portion having a miscible solid physically bonded to an amide functionality or an amine functionality of the build material. The miscible solid is a solid at a room temperature ranging from about 18° C. to about 25° C.

公开(公告)号：US20210178658A1

公开(公告)日：2021-06-17

申请号：US16076369

申请日：2017-07-10

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

Inventor： Aja HARTMAN ,  Adekunle OLUBUMMO ,  Kristopher J. ERICKSON ,  Lihua ZHAO ,  Howard S. TOM

IPC: B29C64/112 ,  B29C64/165 ,  B29C64/205 ,  B29C64/393

Abstract: A device includes a carriage movable relative to a build pad along a bi-directional travel path and supporting at least a radiation source and an applicator to selectively apply a plurality of fluid agents, including first fluid agents to affect a first material property. A timing and order of operation of the radiation source and the applicator, with the carriage, is to maintain first and second portions of a 3D object under formation within at least one selectable temperature range despite a first total volume of the first fluid agents for application onto the first portion of the 3D object being substantially greater than a second total volume of second fluid agents for application onto the second portion of the 3D object.

公开(公告)号：US20190077080A1

公开(公告)日：2019-03-14

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 ,  B29C64/291 ,  B29C64/393 ,  C09D11/50

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：US20190048219A1

公开(公告)日：2019-02-14

申请号：US16076918

申请日：2017-02-06

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

Inventor： Paul OLUBUMMO ,  Lihua ZHAO ,  Kristopher J. ERICKSON ,  Howard S. TOM ,  Aja HARTMAN

IPC: C09D11/54 ,  B29C64/165 ,  B29C64/20 ,  B29C64/393 ,  B29C64/112 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y70/00 ,  C09D11/38 ,  C09D11/328 ,  C09D11/101 ,  C09D11/033 ,  C09D11/037 ,  C09D11/102

Abstract: An example of a fusing agent includes a tetraphenyldiamine-based dye, alkyldiphenyloxide disulfonate, 1-methyl-2-pyrrolidone, and a balance of water. The fusing agent excludes a strong reducing species. The fusing agent may be incorporated into a three-dimensional printing method or a three-dimensional printing system. In an example of the three-dimensional printing method, a polymeric or polymeric composite build material is applied. The fusing agent is selectively applied on at least a portion of the polymeric or polymeric composite build material. The polymeric or polymeric composite build material is exposed to electromagnetic radiation to fuse the portion of the polymeric or polymeric composite build material in contact with the fusing agent to form a layer.

公开(公告)号：US20230373157A1

公开(公告)日：2023-11-23

申请号：US18228526

申请日：2023-07-31

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 ,  B33Y70/10 ,  B33Y70/00 ,  B29K77/00 ,  B29K105/16 ,  B29K505/14 ,  B29K105/00 ,  B29C64/20 ,  B29C64/393 ,  B33Y30/00 ,  B33Y50/02 ,  B29K507/04

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

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：US20230234298A1

公开(公告)日：2023-07-27

申请号：US18127365

申请日：2023-03-28

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

Inventor： Aja HARTMAN ,  Lihua ZHAO

IPC: B29C64/393 ,  B29C64/165 ,  G01N25/72 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y10/00 ,  G01N21/00

CPC classification number: B29C64/393 ,  B29C64/165 ,  G01N25/72 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y10/00 ,  G01N21/00

Abstract: In one example, an additive manufacturing process includes: making an object slice by slice, including dispensing a first quantity of each of multiple liquid functional agents on to a layer of fusable build material and then irradiating the layer of build material; while making the object, identifying a deviant region in a slice; and dispensing a second quantity different from the first quantity of at least one of the functional agents into a location corresponding to the deviant region.

公开(公告)号：US20230067362A1

公开(公告)日：2023-03-02

申请号：US17799719

申请日：2021-03-15

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

Inventor： Lihua ZHAO ,  Agnieszka Maria BRECZEWSKA JAWORSKA ,  Aja HARTMAN ,  Adekunle OLUBUMMO ,  Olivier Maurice Marcel BLANCHOT ,  Isabelle SANTARELLA ROUGEAUX ,  Pierre Nicolas Roger PILUSO ,  Jérôme DELMAS

IPC: B29C64/30 ,  B33Y10/00 ,  B33Y40/20 ,  B29C64/165

Abstract: The present disclosure relates to a method of manufacturing a 3D printed object. The method comprises selectively applying a fusing agent onto powder bed material; and exposing at least part of the powder bed material to radiation to fuse at least part of the powder bed material to form a layer of the 3D printed object. The fusing agent and/or a detailing agent is selectively applied to the powder bed material in a predetermined arrangement to form a porous region in the 3D printed object. The 3D printed object is then treated with a modifying agent, such that the modifying agent at least partially penetrates the porous region of the 3D printed object.

公开(公告)号：US20210187834A1

公开(公告)日：2021-06-24

申请号：US16074276

申请日：2016-10-31

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

Inventor： Aja HARTMAN ,  Krzysztof NAUKA ,  Lihua ZHAO

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/393 ,  B29C64/209 ,  B33Y30/00

Abstract: According to an example, a three-dimensional (3D) printer may include a delivery device to deposit a light absorbing agent onto selected areas of a layer of build material particles, in which the light absorbing agent absorbs light having wavelengths that are around the ultraviolet wavelength range. The 3D printer may also include a light source to apply light onto the selectively deposited light absorbing agent and the layer of the build material particles, in which the light absorbing agent absorbs light around the ultraviolet wavelength range from the applied light and becomes heated to a temperature that causes the build material particles upon which the light absorbing agent has been deposited to melt and to fuse together following cessation of the application of the light.

公开(公告)号：US20190092799A1

公开(公告)日：2019-03-28

申请号：US16079361

申请日：2017-02-06

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

Inventor： Paul OLUBUMMO ,  Lihua ZHAO ,  Aja HARTMAN ,  Howard S. TOM ,  Kristopher J. ERICKSON

IPC: C07F15/04 ,  C07C321/18 ,  B29C64/165

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.