公开(公告)号：US11858041B2

公开(公告)日：2024-01-02

申请号：US15734604

申请日：2019-01-15

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

Inventor： Greg Long ,  Andrew L. Van Brocklin ,  David Champion

IPC: B22F10/85 ,  B22F10/40 ,  G01N27/04 ,  B22F3/00 ,  B33Y40/20

CPC classification number: B22F10/85 ,  B22F3/003 ,  B22F10/40 ,  G01N27/043 ,  B22F2203/11 ,  B33Y40/20

Abstract: In an example implementation, a sintering system includes a support structure in a sintering furnace to support a token green object during a sintering process. The system includes wires installed into the furnace and through the support structure to contact the object. An impedance meter is operatively coupled to the wires to determine electrical impedance of the object during the sintering process.

公开(公告)号：US11668528B2

公开(公告)日：2023-06-06

申请号：US16972109

申请日：2019-01-04

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

Inventor： John Liebeskind ,  Andrew L. Van Brocklin ,  David Champion

IPC: F27D21/02 ,  B22F3/00 ,  B22F3/10 ,  C03C13/04 ,  F27B17/00 ,  F27B17/02 ,  G01N21/55 ,  F21V8/00 ,  C21D1/34 ,  C21D11/00 ,  B22F3/22 ,  G01N21/84

CPC classification number: F27D21/02 ,  B22F3/003 ,  B22F3/10 ,  C03C13/048 ,  F27B17/0016 ,  F27B17/02 ,  G01N21/55 ,  G02B6/0008 ,  B22F3/225 ,  B22F2203/00 ,  B22F2203/03 ,  B22F2203/05 ,  B22F2998/10 ,  B22F2999/00 ,  C21D1/34 ,  C21D11/005 ,  G01N2021/8411 ,  G01N2201/1222

Abstract: In an example implementation, a sintering system includes optical fiber installed into a sintering furnace. A support structure inside the furnace is to support a token green object in a predetermined position and to hold a distal end of the fiber adjacent to the predetermined position. A light source is operably engaged at a proximal end of the fiber to transmit light through the fiber into the furnace. A light detector is operably engaged at the proximal end of the fiber to receive reflected light through the fiber that scatters off a surface of the token green object.

公开(公告)号：US20210215426A1

公开(公告)日：2021-07-15

申请号：US17058068

申请日：2018-11-26

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

Inventor： David Champion ,  Pavan Suri

IPC: F27B5/18 ,  B22F3/10

Abstract: In an example implementation, a method of determining a sintering process endpoint includes monitoring gas flow through a detection gas line routed into a sintering furnace and through a furnace shelf on which a token green object is positioned. The method includes detecting a change in the gas flow when the token green object shrinks during a sintering process in the furnace, and determining that green objects being sintered in the furnace have reached a sintering endpoint when the change in the gas flow reaches a predetermined target.

公开(公告)号：US11612932B2

公开(公告)日：2023-03-28

申请号：US17058585

申请日：2018-11-26

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

Inventor： David Champion ,  Richard Seaver ,  Pavan Suri

IPC: B22F3/10 ,  B33Y40/20 ,  B22F10/64 ,  B22F3/00 ,  F27D19/00 ,  B33Y10/00 ,  B33Y50/02 ,  B22F10/85 ,  G01N9/00 ,  B22F10/14 ,  B22F3/22

Abstract: In an example implementation, a method of operating a sintering furnace includes receiving information about a green object load to be sintered in a sintering furnace, determining a sintering profile based on the information, and performing a sintering process according to the sintering profile. During the sintering process, a sensor reading that indicates a degree of densification of a green object in the load is accessed from a densification sensor. The method includes initiating a cool down phase of the sintering process if the sensor reading has reached a target sensor reading.

公开(公告)号：US20220080508A1

公开(公告)日：2022-03-17

申请号：US17421572

申请日：2019-04-29

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

Inventor： David Champion ,  Daniel Mosher ,  Vladek Kasperchik

IPC: B22F10/85 ,  B33Y10/00 ,  B33Y50/02 ,  B29C64/165 ,  B29C64/393 ,  B22F10/14 ,  B28B1/00 ,  B28B17/00

Abstract: In an example implementation, a method of determining liquid agent amounts in 3D printing includes measuring density levels of a build material at locations across a build material layer and determining if the measured density levels vary from expected density levels. For locations where measured density levels vary from expected density levels, an adjusted liquid agent dose is determined, and for locations where measured density levels do not vary from expected density levels, an expected liquid agent dose is determined. The adjusted and expected liquid agent doses are deposited onto the layer at locations corresponding with the adjusted and expected liquid agent doses.

公开(公告)号：US20210325113A1

公开(公告)日：2021-10-21

申请号：US16972109

申请日：2019-01-04

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

Inventor： John Liebeskind ,  Andrew L. Van Brocklin ,  David Champion

IPC: F27D21/02 ,  G01N21/55 ,  B22F3/00 ,  F21V8/00 ,  C03C13/04 ,  F27B17/00 ,  B22F3/10 ,  F27B17/02

Abstract: In an example implementation, a sintering system includes optical fiber installed into a sintering furnace. A support structure inside the furnace is to support a token green object in a predetermined position and to hold a distal end of the fiber adjacent to the predetermined position. A light source is operably engaged at a proximal end of the fiber to transmit light through the fiber into the furnace. A light detector is operably engaged at the proximal end of the fiber to receive reflected light through the fiber that scatters off a surface of the token green object.

公开(公告)号：US11806788B2

公开(公告)日：2023-11-07

申请号：US17059072

申请日：2018-11-26

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

Inventor： David Champion ,  Pavan Suri ,  John Liebeskind ,  Richard Seaver

IPC: B22F3/10 ,  F27D7/02 ,  F27B5/18 ,  F27D19/00

CPC classification number: B22F3/1007 ,  F27D7/02 ,  B22F2998/10 ,  F27D2019/0006 ,  F27D2019/0028

Abstract: In an example implementation, a sintering system includes a detection gas line to enable gas to flow into a sintering furnace from an external gas supply. The system includes a detection gas port inside the furnace through which gas from the detection gas line is to flow into the furnace, and a registration feature inside the furnace to enable positioning of a token green object proximate the gas detection port. The system includes a gas flow monitor to detect changes in gas flow through the detection gas line when the token green object shrinks during a sintering process in the furnace.

公开(公告)号：US20210379830A1

公开(公告)日：2021-12-09

申请号：US17255149

申请日：2019-02-26

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

Inventor： David Champion ,  Anthony Holden ,  Andrew L. Van Brocklin ,  Daniel Fradl

IPC: B29C64/291 ,  B29C64/393 ,  B29C64/277 ,  B29C64/165 ,  B29C64/295

Abstract: In an example implementation, a method of 3D printing includes receiving a 3D object model that defines the shape of an object to be printed in a layer-by-layer build process, and determining a desired thermal profile based on the shape of the object. For each object layer, a fusing energy radiation pattern is determined based on the desired thermal profile, and an electromagnetic energy emitter array is controlled to deliver fusing energy to the object layer according to the energy radiation pattern.

公开(公告)号：US20210213525A1

公开(公告)日：2021-07-15

申请号：US17059072

申请日：2018-11-26

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

Inventor： David Champion ,  Pavan Suri ,  John Liebeskind ,  Richard Seaver

IPC: B22F3/10 ,  F27D7/02

Abstract: In an example implementation, a sintering system includes a detection gas line to enable gas to flow into a sintering furnace from an external gas supply. The system includes a detection gas port inside the furnace through which gas from the detection gas line is to flow into the furnace, and a registration feature inside the furnace to enable positioning of a token green object proximate the gas detection port. The system includes a gas flow monitor to detect changes in gas flow through the detection gas line when the token green object shrinks during a sintering process in the furnace.

公开(公告)号：US20210362241A1

公开(公告)日：2021-11-25

申请号：US15734604

申请日：2019-01-15

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

Inventor： Greg Long ,  Andrew L. Van Brocklin ,  David Champion

IPC: B22F10/85 ,  G01N27/04 ,  B22F10/40 ,  B33Y30/00 ,  B33Y10/00 ,  B33Y50/02

Abstract: In an example implementation, a sintering system includes a support structure in a sintering furnace to support a token green object during a sintering process. The system includes wires installed into the furnace and through the support structure to contact the object. An impedance meter is operatively coupled to the wires to determine electrical impedance of the object during the sintering process.