公开(公告)号：US20220274163A1

公开(公告)日：2022-09-01

申请号：US17637635

申请日：2019-11-15

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

Inventor： John Samuel Dilip Jangam ,  Kristopher Erickson ,  Thomas Craig Anthony ,  Lihua Zhao

IPC: B22F1/105 ,  B33Y70/00 ,  B33Y10/00 ,  B22F10/14

Abstract: The present disclosure relates to a method of three-dimensional (3D) printing a 3D printed metal object. The method comprises selectively jetting an alloying agent onto build material. The build material comprises a first metal and the alloying agent comprises an alloying component that forms an alloy with the first metal. The method also comprises selectively jetting a binding agent onto the build material; binding the build material to form a layer: the alloying component is incorporated in the 3D object in a predetermined arrangement that comprises a first and a second region. The first region comprises the alloying component and the second region is substantially free from the alloying component or comprises the alloying component at a lower concentration than the first regions. The disclosure also relates to a kit that may be used in the method and a 3D printed structure that may be formed using the method.

公开(公告)号：US11383432B2

公开(公告)日：2022-07-12

申请号：US17031526

申请日：2020-09-24

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 ,  B29C64/291 ,  B22F10/20 ,  B22F10/30 ,  B22F10/36 ,  B22F10/14 ,  B22F10/38 ,  B22F10/28 ,  B22F10/366 ,  B22F10/10 ,  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 a 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：US11338517B2

公开(公告)日：2022-05-24

申请号：US16076339

申请日：2017-04-21

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

Inventor： Ning Ge ,  Steven J. Simske ,  Lihua Zhao ,  David George

IPC: B29C64/393 ,  B29C64/112 ,  B29C64/282 ,  B29C64/209 ,  B29C64/268 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: According to examples, an apparatus may include a printhead assembly containing a housing supporting a printhead. The printhead may have nozzles that are to fire droplets of a functional agent onto a layer of build material particles along respective flight paths to form sections of a 3D object from the build material particles, an array of light emission devices to direct respective light beams in the respective flight paths, and an array of photon detectors to detect respective light beams directed from a light source of the array of light emission devices, the light emission devices and the photon detectors being supported on the housing. The apparatus may also include a controller to determine whether any of the nozzles is operating improperly based upon whether the photon detectors detected the light beams and to output an instruction regarding an improperly operating nozzle in response to a determination that the nozzle is operating improperly.

公开(公告)号：US11338508B2

公开(公告)日：2022-05-24

申请号：US16075672

申请日：2017-01-31

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

Inventor： Ning Ge ,  Steven J. Simske ,  Andrew E. Fitzhugh ,  Lihua Zhao

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/357 ,  B29C64/371 ,  B29C64/214 ,  B29C64/245 ,  B29C64/286

Abstract: According to an example, an apparatus may include an agent delivery device to selectively deliver an agent onto a layer of build material particles. The apparatus may also include an energy source to apply energy onto the layer of build material particles to selectively fuse the build material particles in the layer based upon the locations at which the agent was delivered and a chamber formed of a plurality of walls, in which the agent delivery device and the energy source are housed inside the chamber. The apparatus may further include a vapor source to supply vapor into the chamber to wet the build material particles inside the chamber.

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：US20210362411A1

公开(公告)日：2021-11-25

申请号：US16606310

申请日：2018-03-13

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

Inventor： Kristopher J. Erickson ,  David George ,  Sterling Chaffins ,  Lihua Zhao

IPC: B29C64/194 ,  B29C64/165 ,  B29C64/112 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00 ,  H05K3/28 ,  H05K3/32 ,  H05K3/46 ,  H05K1/18

Abstract: In an example, a method is described that includes building a first layer of a three-dimensional heterogeneous object in a first plurality of passes of an additive manufacturing system. An electronic component is inserted directly into the first layer. The electronic component is then fused to the first layer in a second plurality of passes of the additive manufacturing system.

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：US11084210B2

公开(公告)日：2021-08-10

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: B29C64/10 ,  B29C64/165 ,  B29C64/393 ,  B29C64/245 ,  B29C64/295 ,  B29C64/336 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/00 ,  B33Y50/02

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.