公开(公告)号：US20250121560A1

公开(公告)日：2025-04-17

申请号：US19000566

申请日：2024-12-23

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

Inventor： James W. Stasiak ,  Garry D. Hinch ,  Timothy L. Weber

IPC: B29C64/165 ,  B22F1/0545 ,  B22F1/105 ,  B22F3/10 ,  B22F10/14 ,  B22F10/64 ,  B22F12/13 ,  B22F12/17 ,  B22F12/53 ,  B29C64/209 ,  B29C64/245 ,  B29C64/295 ,  B29C64/371 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/10 ,  C08K3/38 ,  C08L101/00

Abstract: In an example three-dimensional printing method, individual layers of a metal-based build material are patterned, based on a 3D object model, with a binding agent to form an intermediate structure. A case-hardened portion of a 3D object is also patterned (based on the object model) by selectively depositing a hardening agent to deliver a predetermined concentration of a hardening element to at least one of the individual layers, wherein the individual layers are maintained below a vaporization temperature of the hardening agent during the selectively depositing. The intermediate structure is heated at a first rate to a temperature that aids in diffusion of the hardening element, and is held at the temperature for a predetermined time. The intermediate structure is cooled at a second rate. The intermediate structure, with the patterned case-hardened portion, is then sintered at a sintering temperature of the metal-based build material.

公开(公告)号：US12179421B2

公开(公告)日：2024-12-31

申请号：US17288554

申请日：2019-04-27

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

Inventor： James W. Stasiak ,  Garry D. Hinch ,  Timothy L. Weber

IPC: B29C64/165 ,  B22F1/0545 ,  B22F1/105 ,  B22F3/10 ,  B22F10/14 ,  B22F10/64 ,  B22F12/13 ,  B22F12/17 ,  B22F12/53 ,  B29C64/209 ,  B29C64/245 ,  B29C64/295 ,  B29C64/371 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/10 ,  C08K3/38 ,  C08L101/00

Abstract: In an example three-dimensional printing method, individual layers of a metal-based build material are patterned, based on a 3D object model, with a binding agent to form an intermediate structure. A case-hardened portion of a 3D object is also patterned (based on the object model) by selectively depositing a hardening agent to deliver a predetermined concentration of a hardening element to at least one of the individual layers, wherein the individual layers are maintained below a vaporization temperature of the hardening agent during the selectively depositing. The intermediate structure is heated at a first rate to a temperature that aids in diffusion of the hardening element, and is held at the temperature for a predetermined time. The intermediate structure is cooled at a second rate. The intermediate structure, with the patterned case-hardened portion, is then sintered at a sintering temperature of the metal-based build material.

公开(公告)号：US20200338819A1

公开(公告)日：2020-10-29

申请号：US16911137

申请日：2020-06-24

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

Inventor： Garry D. Hinch ,  James W. Stasiak ,  Timothy L. Weber

IPC: B29C64/165 ,  B29C64/295 ,  B29C64/209 ,  B29C64/245 ,  B29C64/371 ,  C08L101/00 ,  C08K3/38 ,  B33Y10/00 ,  B33Y70/10

Abstract: A hardening agent for three-dimensional printing includes a boron-containing hardener and a jettable liquid vehicle, and is devoid of a pigment and a dye. The boron-containing hardener is selected from the group consisting of a water dispersible boron-containing hardener present in an amount ranging from about 6 wt % to about 15 wt %, and a water soluble boron-containing hardener present in an amount ranging from greater than 1 wt % to about 20 wt %.

公开(公告)号：US20240253303A1

公开(公告)日：2024-08-01

申请号：US18290081

申请日：2021-06-03

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

Inventor： Karsten N. Wilson ,  Emre Hiro Discekici ,  Vladek Kasperchik ,  Timothy L. Weber ,  Mark Kowalski ,  Sterling Chaffins ,  Devin Alexander Mourey

IPC: B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00

CPC classification number: B29C64/165 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00

Abstract: A method of three-dimensional printing can include iteratively applying a polymer build material as individual layers to a powder bed, where the polymer build material includes from about 80 wt % to 100 wt % polymeric particles, and based on a three-dimensional object model, selectively applying a coalescing agent onto individual layers of the polymer build material. The coalescing agent can include an aqueous liquid vehicle and a coalescing solvent that depresses a melting point of the polymeric particles. The method can include exposing the powder bed to heat to selectively coalesce portions of individual layers of the polymer build material in contact with the coalescing solvent. The heat may not be sufficient to coalesce the polymer build material that is not in contact with the coalescing solvent and may be sufficient to fuse the polymeric particles in contact with the coalescing solvent together to form a three-dimensional object.

公开(公告)号：US10401280B2

公开(公告)日：2019-09-03

申请号：US15570958

申请日：2015-07-24

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

Inventor： Timothy L. Weber

IPC: G01N21/05 ,  G01N21/11 ,  B01L3/00 ,  G01N21/59 ,  G01N21/64 ,  G01N21/77 ,  G01N21/03

Abstract: In one example, testing cells extend along a length of a slot. Each testing cell includes a microfluidic channel extending from the slot, a pump to move fluid from the slot into the channel, a discharge nozzle through which fluid exits the channel, a fluid discharger to discharge fluid from the channel through the nozzle and a photosensor. A light guide is provided to receive light from an external light source and is to serially transmit the light to the microfluidic channel of each of the plurality of testing cells.

公开(公告)号：US20180113068A1

公开(公告)日：2018-04-26

申请号：US15570958

申请日：2015-07-24

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

Inventor： Timothy L. Weber

IPC: G01N21/05 ,  G01N21/64 ,  G01N21/59 ,  G01N21/11

CPC classification number: G01N21/05 ,  B01L3/50273 ,  B01L2300/0816 ,  B01L2400/0442 ,  G01N21/11 ,  G01N21/59 ,  G01N21/6428 ,  G01N2021/0328 ,  G01N2021/0346 ,  G01N2021/6439 ,  G01N2021/7783 ,  G01N2021/7786 ,  G01N2201/0221 ,  G01N2201/024 ,  G01N2201/0873

Abstract: In one example, testing cells extend along a length of a slot. Each testing cell includes a microfluidic channel extending from the slot, a pump to move fluid from the slot into the channel, a discharge nozzle through which fluid exits the channel, a fluid discharger to discharge fluid from the channel through the nozzle and a photosensor. A light guide is provided to receive light from an external light source and is to serially transmit the light to the microfluidic channel of each of the plurality of testing cells.

公开(公告)号：US20240269921A1

公开(公告)日：2024-08-15

申请号：US18290309

申请日：2021-06-03

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

Inventor： Karsten N. Wilson ,  Emre Hiro Discekici ,  Vladek Kasperchik ,  Timothy L. Weber ,  Sterling Chaffins ,  Devin Alexander Mourey

IPC: B29C64/165 ,  B29C64/188 ,  B29C64/264 ,  B29K221/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/20

CPC classification number: B29C64/165 ,  B29C64/188 ,  B29C64/264 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/20 ,  B29K2221/00

Abstract: Methods of three-dimensional printing can include iteratively applying a polymer build material as individual layers to a powder bed, where the polymer build material includes from about 80 wt % to 100 wt % polymer build particles, and based on a three-dimensional object model, selectively applying a binder agent including an aqueous liquid vehicle and polymer binder particles onto the individual layers of the polymer build material. The polymer binder particles have or are capable of having a melting temperature lower than a melting temperature of the polymer build particles. The methods can include exposing the powder bed to heat at a temperature less than a melting point of the polymer build particles but greater than a melting temperature of the polymer binder particles. The heat causes the polymer binder particles to melt to adhere the polymer build particles together to form a three-dimensional object.