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    THREE-DIMENSIONAL PRINTING
    4.
    发明申请
    THREE-DIMENSIONAL PRINTING 有权

    公开(公告)号：US20220379554A1

    公开(公告)日：2022-12-01

    申请号：US17864903

    申请日：2022-07-14

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

    Inventor： Kenneth Flack ,  Erica Fung ,  Carolin Fleischmann ,  Jesiska Tandy ,  Carmina Querol Esparch ,  Greg S. Long ,  Ali Emamjomeh ,  Shannon Reuben Woodruff ,  Rachael Donovan

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

    Abstract: An example of a three-dimensional (3D) printing kit includes a build material composition and a fusing agent to be applied to at least a portion of the build material composition during 3D printing. The build material composition includes a semi-crystalline or amorphous thermoplastic polymer having a predicted total dimension change during 3D printing ranging from about −4% to about 9%. The fusing agent includes an energy absorber to absorb electromagnetic radiation to coalesce the semi-crystalline or amorphous thermoplastic polymer in the at least the portion. The fusing agent is a core fusing agent and the energy absorber has absorption at least at wavelengths ranging from 400 nm to 780 nm; or the fusing agent is a primer fusing agent and the energy absorber has absorption at wavelengths ranging from 800 nm to 4000 nm and has transparency at wavelengths ranging from 400 nm to 780 nm.

    Three-dimensional (3D) printing method
    6.
    发明授权
    Three-dimensional (3D) printing method 有权

    公开(公告)号：US11254068B2

    公开(公告)日：2022-02-22

    申请号：US15518229

    申请日：2014-10-29

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

    Inventor： Hou T. Ng ,  Sivapackia Ganapathiappan ,  Alejandro Manuel De Pena ,  Edward Dale Davis ,  Ali Emamjomeh

    IPC: B29C67/24 ,  B29C64/165 ,  B22F1/00 ,  B29C64/153 ,  B22F10/10 ,  B33Y30/00 ,  B33Y10/00 ,  B33Y50/00 ,  B33Y50/02

    Abstract: In an example of a three-dimensional (3D) printing method, a build material (consisting of an inorganic particle and a polymer attached thereto) is applied. The polymer is a continuous coating having a thickness from about 3 nm to about 1500 nm, or nano-beads having an average diameter from about 3 nm to about 1500 nm. The build material is heated to a temperature from about 5° C. to about 50° C. below the polymer's melting point. A coalescent dispersion (including a coalescent agent and inorganic nanoparticles) is selectively applied on a portion of the build material, and the applied build material and coalescent dispersion are exposed to electromagnetic radiation. The coalescent dispersion absorbs the electromagnetic radiation and heats up the portion of the build material in contact therewith to fuse the portion of the build material in contact with the coalescent dispersion and to form a layer of a 3D object.

    Three-dimensional (3D) printing
    8.
    发明授权
    Three-dimensional (3D) printing 有权

    公开(公告)号：US10576685B2

    公开(公告)日：2020-03-03

    申请号：US15546567

    申请日：2015-04-30

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

    Inventor： Ali Emamjomeh ,  Keshava A. Prasad ,  Alexey S. Kabalnov ,  Yi Feng ,  Winthrop Childers

    IPC: B29C64/20 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/165 ,  B22F3/10 ,  B22F3/00 ,  B29C64/393

    Abstract: A three-dimensional (3D) printing method includes applying a build material, including: a plurality of first reactive particles; a plurality of second reactive particles, the first and second reactive particles to react with each other upon contact there with; and a coating on i) the plurality of first reactive particles; or ii) the plurality of second reactive particles; or iii) both i) and ii). The coating is to isolate the plurality of first reactive from the plurality of second reactive particles. A fluid is selectively applied on a portion of the build material, the fluid disrupting the coating on the portion of the build material to render the first and second reactive particles in the portion of the build material in contact with each other. The contact initiates mutual reacting and fusing between the first and second reactive particles.

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