公开(公告)号：US20210187834A1

公开(公告)日：2021-06-24

申请号：US16074276

申请日：2016-10-31

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

Inventor： Aja HARTMAN ,  Krzysztof NAUKA ,  Lihua ZHAO

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/393 ,  B29C64/209 ,  B33Y30/00

Abstract: According to an example, a three-dimensional (3D) printer may include a delivery device to deposit a light absorbing agent onto selected areas of a layer of build material particles, in which the light absorbing agent absorbs light having wavelengths that are around the ultraviolet wavelength range. The 3D printer may also include a light source to apply light onto the selectively deposited light absorbing agent and the layer of the build material particles, in which the light absorbing agent absorbs light around the ultraviolet wavelength range from the applied light and becomes heated to a temperature that causes the build material particles upon which the light absorbing agent has been deposited to melt and to fuse together following cessation of the application of the light.

公开(公告)号：US20190152156A1

公开(公告)日：2019-05-23

申请号：US16097687

申请日：2016-07-21

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

Inventor： Peter MOROVIC ,  Jan MOROVIC ,  Ingeborg TASTL ,  Melanie M. GOTTWALS ,  Andrew E. FITZHUGH ,  Gary J. DISPOTO ,  Lihua ZHAO

IPC: B29C64/393 ,  B33Y50/02 ,  G05B19/4099

Abstract: In an example, a processing apparatus includes an interface to receive data representing a three-dimensional object. The data includes an object description comprising object property data. The processing apparatus comprises a mapping module to map the object description to an object generation description which includes at least one print material instruction associated with a predetermined combination of print materials from a set of print materials. The mapping module includes a plurality of mapping resources and each mapping resource associates combinations of print materials from the set of print materials with values of at least one object property. At least one object property of one mapping resource is different to at least one object property of another mapping resource. The processing apparatus also includes a selection module to select, for at least part of the object, one of the plurality of mapping resources to carry out mapping of the object description.

公开(公告)号：US20190092799A1

公开(公告)日：2019-03-28

申请号：US16079361

申请日：2017-02-06

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

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

IPC: C07F15/04 ,  C07C321/18 ,  B29C64/165

Abstract: An example of a fusing agent includes a metal bis(dithiolene) complex, a thiol surfactant, a polar aprotic solvent, and a balance of water. In an example of a method of making the fusing agent, the metal bis(dithiolene) complex is exposed to an aqueous solution including a reducing agent and a thiol surfactant to form a reduced metal bis(dithiolene) complex and to dissolve the reduced metal bis(dithiolene) complex in the aqueous solution. The aqueous solution is incorporated into a vehicle including a water soluble organic solvent and an additive selected from the group consisting of an emulsifier, a surface tension reduction agent, a wetting agent, a scale inhibitor, an anti-deceleration agent, a chelating agent, an antimicrobial agent, and a combination thereof. The fusing agent may be utilized in a three-dimensional printing method and/or incorporated into a three-dimensional printing system.

公开(公告)号：US20190054699A1

公开(公告)日：2019-02-21

申请号：US15770476

申请日：2016-02-08

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

Inventor： Yan ZHAO ,  Aja HARTMAN ,  Lihua ZHAO

IPC: B29C64/393 ,  B33Y50/02 ,  B33Y40/00 ,  B29C64/165 ,  B33Y10/00

Abstract: Examples include an apparatus for generating a three-dimensional object. The apparatus comprises at least one energy source, at least one build layer temperature sensor, and a controller. The controller is to control the at least one energy source to pre-fuse a portion of a build layer in a build area when a build layer temperature is less than a first temperature threshold. The controller is further to, after pre-fusing the portion of the build layer, control the at least one energy source to fuse the portion of the build layer in the build area when the build layer temperature is less than a second threshold.

公开(公告)号：US20180297286A1

公开(公告)日：2018-10-18

申请号：US15569381

申请日：2015-07-09

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

Inventor： Jacob Tyler WRIGHT ,  Bernardo a. GUTIERREZ ,  Sergio PUIGARDEU ARAMENDIA ,  Ali EMAMJOMEH ,  Lihua ZHAO ,  Andrew E. FITZHUGH

IPC: B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/165 ,  B29C64/205

Abstract: An agent distributor may be to selectively deliver agent at a first contone density and at a second contone density different from the first contone density respectively onto an interior portion and a surface portion of successive layers of build material in respective first and second patterns in accordance with data representing a three-dimensional object to be generated, so that the build material is to solidify to form slices of the three-dimensional object in accordance with the first and second patterns, and so that the three-dimensional object is to achieve a target surface roughness as a result of the second contone density of the second pattern.

公开(公告)号：US20170274593A1

公开(公告)日：2017-09-28

申请号：US15518477

申请日：2014-12-15

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

Inventor： Krzysztof NAUKA ,  Sivapackia GANAPATHIAPPAN ,  Lihua ZHAO ,  Howard S. TOM ,  Yan ZHAO ,  Hou T. NG

IPC: B29C67/00 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y10/00

Abstract: In one example, a non-transitory processor readable medium with instructions thereon that when executed cause an additive manufacturing machine to partially or completely bury a part in layers of molten build material.

公开(公告)号：US20240001446A1

公开(公告)日：2024-01-04

申请号：US18037920

申请日：2020-12-01

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

Inventor： John Samuel Dilip JANGAM ,  Thomas ANTHONY ,  Lihua ZHAO ,  James MCKINNELL

IPC: B22F10/62 ,  B33Y70/10 ,  B22F1/05 ,  B22F1/103 ,  B33Y10/00 ,  B22F10/14 ,  B22F10/64 ,  B33Y40/20

CPC classification number: B22F10/62 ,  B33Y70/10 ,  B22F1/05 ,  B22F1/103 ,  B33Y10/00 ,  B22F10/14 ,  B22F10/64 ,  B33Y40/20 ,  B22F2301/052 ,  B22F2301/35 ,  B22F2301/205 ,  B22F2302/253 ,  B22F2998/10 ,  B22F2999/00 ,  B22F2201/11 ,  B22F2201/013

Abstract: A shaping composition for controlling deformation of a green body object can include from about 10 wt % to about 80 wt % liquid vehicle, and from about 10 wt % to about 90 wt % metal particulates. The metal particulates can include from about 35 wt % to about 90 wt % high melting point metal particles, from about 10 wt % to about 65 wt % aluminum alloy particles, and from about 0.1 wt % to about 10 wt % metal complex selected from an inorganic metal salt, an organic metal salt, or a metal oxide. The metal of the metal complex can include copper, iron, aluminum, chromium, titanium, cobalt, silver, gold, nickel, tin, or zinc.

公开(公告)号：US20210200186A1

公开(公告)日：2021-07-01

申请号：US16076241

申请日：2017-07-28

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

Inventor： Vanessa VERZWYVELT ,  Matthew A SHEPHERD ,  Morgan T SCHRAMM ,  Andrew E FITZHUGH ,  Lihua ZHAO ,  Jacob Tyler WRIGHT ,  Hector LEBRON

IPC: G05B19/4099 ,  G06N5/04 ,  B33Y50/00

Abstract: In an example, a method includes receiving object model data describing at least a portion of an object to be generated by additive manufacturing. Object generation instructions for generating the object in its entirety may be derived based on the object model data. Where it is determined that the object model data comprises a data deficiency for deriving the object generation instructions, at least one attribute for the object may be inferred and object generation instructions may be derived based on the object model data and the inferred attribute.

公开(公告)号：US20210197503A1

公开(公告)日：2021-07-01

申请号：US16075671

申请日：2017-02-28

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

Inventor： Krzysztof NAUKA ,  Andrew E. FITZHUGH ,  Lihua ZHAO

IPC: B29C71/04 ,  B29C64/118 ,  B29C64/30 ,  B29C35/08 ,  B29C59/16

Abstract: According to examples, an apparatus includes a processor and a memory on which is stored machine readable instructions. The instructions may cause the processor to identify an intended surface property level for a surface of a three-dimensional (3D) object, determine an amount of radiation to be applied as a flash of radiation onto the surface to obtain the intended surface property level, and output the determined amount of radiation to be applied as a flash of radiation, in which a radiation source is to flash apply the determined amount of radiation onto the surface of the 3D object.

公开(公告)号：US20210197487A1

公开(公告)日：2021-07-01

申请号：US16076339

申请日：2017-04-21

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

Inventor： Ning GE ,  Steven J. SIMSKE ,  Lihua ZHAO ,  David GEORGE

IPC: B29C64/393 ,  B29C64/268 ,  B29C64/282 ,  B29C64/112 ,  B29C64/209

Abstract: According to examples, an apparatus may include a printhead assembly containing a housing supporting a printhead. The printhead may have nozzles that are to fire droplets of a functional agent onto a layer of build material particles along respective flight paths to form sections of a 3D object from the build material particles, an array of light emission devices to direct respective light beams in the respective flight paths, and an array of photon detectors to detect respective light beams directed from a light source of the array of light emission devices, the light emission devices and the photon detectors being supported on the housing. The apparatus may also include a controller to determine whether any of the nozzles is operating improperly based upon whether the photon detectors detected the light beams and to output an instruction regarding an improperly operating nozzle in response to a determination that the nozzle is operating improperly.