公开(公告)号：US20210197280A1

公开(公告)日：2021-07-01

申请号：US16077772

申请日：2017-10-12

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

Inventor： Vladek KASPERCHIK ,  Mohammed S. SHAARAWI ,  James MCKINNELL

IPC: B22F10/50 ,  B33Y70/10 ,  B29C64/165 ,  B33Y10/00 ,  B22F10/14 ,  B22F3/10

Abstract: An example of a method, for three-dimensional (3D) printing, includes applying a build material and patterning at least a portion of the build material. The patterning includes selectively applying a wetting amount of a binder fluid on the at least the portion of the build material and subsequently selectively applying a remaining amount of the binder fluid on the at least the portion of the build material. An area density in grams per meter square meter (gsm) of the wetting amount ranges from about 2 times less to about 30 times less than area density in gsm of the remaining amount.

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：US20210197269A1

公开(公告)日：2021-07-01

申请号：US16077770

申请日：2017-02-24

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

Inventor： Vladek KASPERCHIK ,  Mohammed S. SHAARAWI ,  Michael G. MONROE ,  David Michael INGLE

IPC: B22F10/14 ,  B33Y70/10 ,  B33Y10/00 ,  B33Y30/00 ,  B29C64/165 ,  B29C64/209 ,  B29C64/295 ,  B22F3/10

Abstract: In a three-dimensional (3D) printing method example, a metallic build material is applied. A binder fluid is selectively applied on at least a portion of the metallic build material. The binder fluid includes a liquid vehicle and polymer particles dispersed in the liquid vehicle. The application of the metallic build material and the selective application of the binder fluid are repeated to create a patterned green part. The patterned green part is heated to at about a melting point of the polymer particles to activate the binder fluid and create a cured green part. The cured green part is heated to a thermal decomposition temperature of the polymer particles to create an at least substantially polymer-free gray part. The at least substantially polymer-free gray part is heated to a sintering temperature to form a metallic part.

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.