公开(公告)号：US20210178658A1

公开(公告)日：2021-06-17

申请号：US16076369

申请日：2017-07-10

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

Inventor： Aja HARTMAN ,  Adekunle OLUBUMMO ,  Kristopher J. ERICKSON ,  Lihua ZHAO ,  Howard S. TOM

IPC: B29C64/112 ,  B29C64/165 ,  B29C64/205 ,  B29C64/393

Abstract: A device includes a carriage movable relative to a build pad along a bi-directional travel path and supporting at least a radiation source and an applicator to selectively apply a plurality of fluid agents, including first fluid agents to affect a first material property. A timing and order of operation of the radiation source and the applicator, with the carriage, is to maintain first and second portions of a 3D object under formation within at least one selectable temperature range despite a first total volume of the first fluid agents for application onto the first portion of the 3D object being substantially greater than a second total volume of second fluid agents for application onto the second portion of the 3D object.

公开(公告)号：US20230067362A1

公开(公告)日：2023-03-02

申请号：US17799719

申请日：2021-03-15

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

Inventor： Lihua ZHAO ,  Agnieszka Maria BRECZEWSKA JAWORSKA ,  Aja HARTMAN ,  Adekunle OLUBUMMO ,  Olivier Maurice Marcel BLANCHOT ,  Isabelle SANTARELLA ROUGEAUX ,  Pierre Nicolas Roger PILUSO ,  Jérôme DELMAS

IPC: B29C64/30 ,  B33Y10/00 ,  B33Y40/20 ,  B29C64/165

Abstract: The present disclosure relates to a method of manufacturing a 3D printed object. The method comprises selectively applying a fusing agent onto powder bed material; and exposing at least part of the powder bed material to radiation to fuse at least part of the powder bed material to form a layer of the 3D printed object. The fusing agent and/or a detailing agent is selectively applied to the powder bed material in a predetermined arrangement to form a porous region in the 3D printed object. The 3D printed object is then treated with a modifying agent, such that the modifying agent at least partially penetrates the porous region of the 3D printed object.

公开(公告)号：US20190016043A1

公开(公告)日：2019-01-17

申请号：US16080233

申请日：2017-06-13

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

Inventor： Adekunle OLUBUMMO ,  Lihua ZHAO

IPC: B29C64/165 ,  B29C64/214 ,  B29C64/218

Abstract: Compositions and methods for 3D printing are described herein. In an example, a composition for 3D printing can comprise a build material comprising at least one polymer and at least one first electron donor compound; and a fusing agent comprising (i) a metal bis(dithiolene) complex, (ii) at least one surfactant, at least one second electron donor compound, or combinations thereof, (iii) a polar aprotic solvent, and (iv) water. The at least one first electron donor compound and the at least one second electron donor compound can be the same or different.