公开(公告)号：US20210197263A1

公开(公告)日：2021-07-01

申请号：US16075030

申请日：2017-04-21

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

Inventor： Timothy L. WEBER ,  James MCKINNELL ,  David A. CHAMPION ,  Mohammed S. SHAARAWI

IPC: B22F9/04 ,  B22F1/00 ,  B33Y70/00 ,  B22F9/14

Abstract: A device for forming spherical particles may include a receiving chamber having a heating portion and a cooling portion. Wire segments may travel in a free fall through the receiving chamber. While falling through the heating portion, wire segments may be heated to form spherical particles in response to exposure to microwave electromagnetic radiation. While falling through the cooling portion, formed spherical particles cool.

公开(公告)号：US20210053278A1

公开(公告)日：2021-02-25

申请号：US16074805

申请日：2017-03-29

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

Inventor： Cary G. ADDINGTON ,  David A. CHAMPION ,  Mohammed S. SHAARAWI ,  James McKINNELL ,  Diane R. HAMMERSTAD

IPC: B29C64/153 ,  B33Y50/02 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/268 ,  B29C64/282

Abstract: In one example, a processor readable medium having instructions thereon that when executed cause an additive manufacturing machine to vary operating characteristics of a fusing laser beam at multiple different voxel locations in a layer of build material according to an energy dosage to be applied at each voxel location in an object slice, including multiple different energy dosages for corresponding multiple different voxel locations in the slice.

公开(公告)号：US20210276265A1

公开(公告)日：2021-09-09

申请号：US16608378

申请日：2018-03-23

Applicant: OREGON STATE UNIVERSITY ,  HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Daniel MOSHER ,  David A. CHAMPION ,  Brian BAY

IPC: B29C64/393 ,  B29C64/153 ,  B29C64/218 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: According to examples, an apparatus may include a processor and a memory on which is stored machine readable instructions. The processor may execute the instructions to access a first stereoscopic three-dimensional (3D) image of a surface of a layer of build material particles and a second stereoscopic 3D image of the layer surface, the second stereoscopic 3D image being captured at a later time than the first stereoscopic 3D image. The processor may also generate a 3D deformation map of the layer surface from the first stereoscopic 3D image and the second stereoscopic 3D image and may implement an action based on the generated 3D deformation map of the layer surface.

公开(公告)号：US20210245436A1

公开(公告)日：2021-08-12

申请号：US17052100

申请日：2018-10-30

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

Inventor： David A. CHAMPION ,  Douglas PEDERSON ,  Peter J. KLAMMER

IPC: B29C64/282 ,  B29C64/393 ,  B29C64/153

Abstract: According to examples, an apparatus may include an agent delivery device to deliver a coalescing agent to a selected location of a build material layer and a plurality of microwave energy emitters, each of which may include a tip to generate a focused microwave energy field onto a respective area near the tip. The apparatus may also include a controller that may control delivery of a first signal to a first microwave energy emitter of the plurality of microwave energy emitters; receive an energy feedback signal corresponding to energy reflected back into the first microwave energy emitter; determine, based on the received energy feedback signal, a power level of a second signal to be delivered to a microwave energy emitter of the plurality of microwave energy emitters; and control delivery of the second signal at the determined power level to the microwave energy emitter.

公开(公告)号：US20210205894A1

公开(公告)日：2021-07-08

申请号：US16074457

申请日：2017-01-31

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

Inventor： Greg Scott LONG ,  Douglas PEDERSON ,  David A. CHAMPION

IPC: B22F12/90 ,  G01N22/02 ,  B22F10/85 ,  B33Y50/02 ,  B33Y10/00 ,  B33Y30/00

Abstract: A system and method for additive manufacturing (AM) including forming a product via AM, placing a resonator adjacent the product as the product is being formed in the AM, and determining a property of the product. The resonator operates over a microwave frequency spectrum and emanates electromagnetic energy.

公开(公告)号：US20210362227A1

公开(公告)日：2021-11-25

申请号：US15734400

申请日：2018-10-30

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

Inventor： James P. SHIELDS ,  David A. CHAMPION

IPC: B22F3/00 ,  B22F3/10

Abstract: Techniques for using a pin array to support a 3D printed object during sintering are disclosed. An example method includes adjusting pins of a pin array to provide support for a bottom surface of the 3D printed object, and placing the 3D printed object on the pin array. The method also includes placing the 3D printed object and pin array in a sintering oven, and heating the 3D printed object in the sintering oven to sinter the 3D printed object while being supported by the pin array.

公开(公告)号：US20210323240A1

公开(公告)日：2021-10-21

申请号：US17272589

申请日：2019-04-22

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

Inventor： David A. CHAMPION ,  Anthony Peter HOLDEN ,  Douglas PEDERSON

IPC: B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/165 ,  B29C64/277 ,  B29C64/227

Abstract: An example three-dimensional printing system receives a sensor response indicating a density of build material at positions of a layer of build material on a build platform. The three-dimensional printing system determines, based on the sensor response, an amount of energy to apply to the positions and instructs an energy source to apply the determined amount of energy to the positions.

公开(公告)号：US20210245434A1

公开(公告)日：2021-08-12

申请号：US17052087

申请日：2018-10-30

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

Inventor： David A. CHAMPION ,  Douglas PEDERSON

IPC: B29C64/264 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/393 ,  B28B1/00 ,  B28B17/00 ,  B22F12/41 ,  B22F10/85

Abstract: According to examples, an apparatus may include an agent delivery device to deliver a coalescing agent to selected locations of a build material layer and a plurality of microwave energy emitters, each of the microwave energy emitters including a tip to generate a focused microwave energy field onto a respective area near the tip, in which the tip is to be positioned to place a portion of the build material layer within the focused microwave energy field. The apparatus may also include a controller that may control the microwave energy emitters to direct microwave energy onto the build material layer.