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    PRINTING DEVICES
    3.
    发明申请
    PRINTING DEVICES 审中-公开

    公开(公告)号：US20180281278A1

    公开(公告)日：2018-10-04

    申请号：US15764765

    申请日：2016-01-20

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

    Inventor： David George ,  Chandrakant Patel ,  Lihua Zhao ,  Michael Renne Ty Tan

    IPC: B29C64/153 ,  B29C64/393 ,  B29C64/264 ,  H01S5/183

    Abstract: In one example, a device for printing a three-dimensional object is described. The device may include at least one material application unit to deposit at least one material for a voxel of the three-dimensional object, a vertical cavity surface emitting laser array comprising a plurality of vertical cavity surface emitting lasers, the plurality of vertical cavity surface emitting lasers including a first vertical cavity surface emitting laser to operate at a first wavelength and a second vertical cavity surface emitting laser to operate at a second wavelength, and a processor to control a deposition of the at least one material for the voxel via the at least one material application unit and to control an application of electromagnetic energy via at least one of the plurality of vertical cavity surface emitting lasers to the voxel to alter at least one property of the at least one material.

    Arrangement determination for 3D fabricated parts
    4.
    发明授权
    Arrangement determination for 3D fabricated parts 有权

    公开(公告)号：US11335074B2

    公开(公告)日：2022-05-17

    申请号：US16345853

    申请日：2016-12-19

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

    Inventor： Ning Ge ,  Steven J. Simske ,  Chandrakant Patel ,  Jun Zeng ,  Paul J. Benning ,  Lihua Zhao

    IPC: G05B19/4099 ,  G06T19/20 ,  B29C64/147 ,  G06T17/05 ,  B29C64/386

    Abstract: According to an example, an apparatus may include a memory that may store instructions to cause a processor to generate, for each part to be fabricated in a build envelope of a 3D fabricating device, first level descriptions and second level descriptions for the part. The processor may determine, using the first level descriptions, whether there is an arrangement that results in the parts jointly fitting within the build envelope while providing certain thermal decoupling spaces between the parts. In response to a determination that the arrangement using the first level descriptions for the parts has not been determined, the processor may determine, using the second level descriptions, whether there is an arrangement that results in the parts jointly fitting within the build envelope while providing the certain thermal decoupling spaces.

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

    公开(公告)号：US11292061B2

    公开(公告)日：2022-04-05

    申请号：US16074274

    申请日：2016-10-19

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

    Inventor： Ning Ge ,  Steven J. Simske ,  Chandrakant Patel

    IPC: B22F10/50 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00 ,  B33Y40/20 ,  B33Y40/10 ,  B22F10/64 ,  B22F12/41 ,  B22F10/28 ,  B22F1/00

    Abstract: In an example of a 3D printing method, build material particles are applied to form a layer. Each build material particle includes a metal core and a metal oxide outer shell. The layer is patterned by selectively applying a reactive chemical on at least a portion of the layer to initiate a redox reaction with the metal oxide outer shells of the build material particles in contact with the reactive chemical, which reduces the metal oxide outer shells of the build material particles in contact with the reactive chemical and exposes the metal cores of the build material particles in contact with the reactive chemical. The patterned layer is exposed to rapid thermal processing to sinter the exposed metal cores to form a part layer. Any intact build material particles remain unsintered.

    3D PRINTER WITH TUNED COOLANT DROPLETS
    7.
    发明申请
    3D PRINTER WITH TUNED COOLANT DROPLETS 审中-公开

    公开(公告)号：US20190030797A1

    公开(公告)日：2019-01-31

    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: B29C64/165 ,  B29C64/393 ,  B29C64/336 ,  B29C64/245 ,  B29C64/295

    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.

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