公开(公告)号：US20210331388A1

公开(公告)日：2021-10-28

申请号：US17258315

申请日：2019-01-15

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

Inventor： Kristopher Erickson ,  Jarrid Wittkopf ,  Lihua Zhao

IPC: B29C64/188 ,  B29C64/165 ,  B29C64/393 ,  B29C64/209 ,  B29C64/264 ,  B33Y50/02 ,  B33Y10/00 ,  B33Y30/00

Abstract: Some examples include an additive manufacturing system including a processor and a memory to store instructions. The instructions cause the processor to generate print data from received data related to a three-dimensional build object. The generated print data includes defined print data to dispensing a first agent at a build area of a build material layer, defined print data to selectively dispensing a second agent at a component receiving area within the build area of the build material layer, the second agent to locally reduce a viscosity of the build material at the component receiving area to a viscous state, and defined print data to position a component within the component receiving area at a time of the component receiving area being in a viscous state.

公开(公告)号：US11072123B2

公开(公告)日：2021-07-27

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 ,  B33Y30/00 ,  B33Y10/00 ,  G01N25/72 ,  B33Y50/02 ,  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：US11008479B2

公开(公告)日：2021-05-18

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 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/165 ,  B29C64/393 ,  C09D11/033 ,  C09D11/037 ,  C09D11/30 ,  B33Y50/02 ,  B33Y70/00 ,  B29C64/112 ,  B29C64/20 ,  C09D11/101 ,  C09D11/102 ,  C09D11/328 ,  C09D11/38

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：US10974450B2

公开(公告)日：2021-04-13

申请号：US16072247

申请日：2016-05-17

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

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

IPC: B29C64/165 ,  B29C64/393 ,  B29C64/282 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y10/00 ,  B29C64/295

Abstract: According to an example, a three-dimensional (3D) printer may include a first delivery device to selectively deposit first liquid droplets onto a layer of build materials, in which the first liquid has a fusing radiation absorption property. The 3D printer may also include a fusing radiation generator to selectively emit fusing radiation at multiple ranges of wavelengths and at selected locations to selectively fuse the build materials and a controller to tune a range of wavelengths at which the fusing radiation generator is to emit fusing radiation based upon the fusing radiation absorbing property of the deposited first liquid, to determine the selected locations at which the fusing radiation at the tuned range of wavelengths is to be emitted, and to control the fusing radiation generator to selectively emit fusing radiation at the tuned range of wavelengths and onto the selected locations.

公开(公告)号：US10814549B2

公开(公告)日：2020-10-27

申请号：US15545956

申请日：2015-04-30

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 ,  B22F3/105 ,  B29C64/291 ,  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 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：US10675812B2

公开(公告)日：2020-06-09

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 ,  B33Y30/00 ,  B33Y10/00 ,  B22F3/105 ,  B33Y50/02 ,  B29C64/393 ,  B29C64/291

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.

公开(公告)号：US10647053B2

公开(公告)日：2020-05-12

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: B27N5/00 ,  B29C41/22 ,  B29C67/04 ,  B29C70/28 ,  B29C71/04 ,  B29C64/112 ,  B33Y70/00 ,  B33Y10/00 ,  B33Y50/02 ,  B29C67/00 ,  B29C64/165 ,  B29C64/264

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：US10544311B2

公开(公告)日：2020-01-28

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 ,  C08L101/00 ,  C08L77/02 ,  C08L77/06 ,  B29C64/40 ,  B29C64/386 ,  B29C64/165 ,  B29C64/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/00 ,  B33Y50/02 ,  B33Y70/00 ,  C08J3/12 ,  C09D177/02 ,  G06F17/50 ,  B29K77/00 ,  B29K105/00

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 1.

公开(公告)号：US20190382429A1

公开(公告)日：2019-12-19

申请号：US16475534

申请日：2017-04-17

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

Inventor： Adekunle Olubummo ,  Aja Hartman ,  Lihua Zhao

IPC: C07F15/04 ,  B33Y70/00 ,  B29C64/165 ,  B33Y10/00

Abstract: Fusing agent(s) are described herein. In an example, a fusing agent can comprise a metal bis(dithiolene) complex, at least one electron donor compound, a polar aprotic solvent, and water. In some examples, the at least one electron donor compound can comprise at least one hindered amine light stabilizer compound. In some examples, the polar aprotic solvent can be selected from the group consisting of 1-methyl-2-pyrrolidone, 2-pyrrolidone, 1-(2-hydroxyethyl)-2-pyrrolidone, dimethylformamide (DMF), dimethyl sulfoxide (DMSO), and a combination thereof.

公开(公告)号：US10393662B2

公开(公告)日：2019-08-27

申请号：US15646041

申请日：2017-07-10

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY L.P.

Inventor： Zhang-Lin Zhou ,  Lihua Zhao ,  Steven J. Barcelo ,  Zhiyong Li

IPC: B82Y15/00 ,  G01N21/64 ,  B82Y20/00 ,  B82Y40/00 ,  G01N21/65

Abstract: A method for forming a surface-enhanced fluorescence spectroscopy (SEFS) apparatus may include depositing a plurality of surface-enhanced spectroscopy (SES) elements onto respective tips of a plurality of nano-fingers, wherein the nano-fingers are arranged in sufficiently close proximities to each other to enable the tips of a group of adjacent nano-fingers to come into sufficiently close proximities to each other to enable the SES elements on the tips to trap fluorescent probe molecules that are to bind with target molecules when the nano-fingers are partially collapsed.