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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
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.
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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.
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公开(公告)号：US20210121954A1
公开(公告)日：2021-04-29
申请号：US17058585
申请日：2018-11-26
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： David Champion , Richard Seaver , Pavan Suri
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.
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公开(公告)号：US20220274176A1
公开(公告)日：2022-09-01
申请号：US17637651
申请日：2019-10-22
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Pavan Suri , Mackensie C. Smith
Abstract: A three-dimensional printing kit can include a binding agent and a particulate build material. The binding agent can include a binder in a liquid vehicle. The particulate build material can include from about 80 wt % to 100 wt % gas-atomized stainless steel particles. The gas-atomized stainless steel particles can include from about 3 wt % to about 15 wt % nickel and from about 10 wt % to about 20 wt % chromium and can have an average oxygen content of from about 1200 ppm to about 2200 ppm by weight.
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Patent Agency Ranking
公开(公告)号：US20220274173A1
公开(公告)日：2022-09-01
申请号：US17637477
申请日：2019-10-23
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Pavan Suri , Mackensie Smith , James McKinnell
IPC: B22F10/14 , B33Y70/00 , B33Y10/00 , B33Y30/00 , C22C38/48 , B22F1/05 , C22C38/42 , B22F3/10 , B33Y40/20
Abstract: Three-dimensional printing can include iteratively applying build material layers including stainless steel particles, iteratively applying a binding agent to individual build material layers to define individually patterned object layers that become adhered to one another to form a layered green body object, and sintering the layered green body object in a sintering oven. The stainless steel particles can include from about (2) wt % to about (6) wt % nickel, from about (14) wt % to about (19) wt % chromium, from about (2) wt % to about (6) wt % copper, and up to about (700) ppm carbon. Sintering can include ramping up the temperature to about (1240)° C. to about (1320)° C., pausing for about (30) minutes to about (12) hours, and ramping up the temperature to about (1350)° C. to about (1400)° C. for (10) minutes to about (6) hours.
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公开(公告)号：US20220258238A1
公开(公告)日：2022-08-18
申请号：US17628919
申请日：2019-09-05
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Mackensie Cathryn Smith , James McKinnell , Pavan Suri
IPC: B22F10/14 , B33Y10/00 , B33Y30/00 , B33Y70/00 , C22C38/44 , B22F1/05 , C22C38/04 , C22C38/52 , C22C38/00 , C22C38/02
Abstract: A three-dimensional printing kit can include a binding agent including a binder in a liquid vehicle and a particulate build material including from about 80 wt % to 100 wt % stainless steel particles having a D50 particle size from about 5 μm to about 125 μm. From about 75 wt % to 100 wt % of the stainless steel particles can be austenitic stainless steel particles including from about 10 wt % to about 12.3 wt % nickel, from about 10 wt % to about 20 wt % chromium, from about 1.5 wt % to about 4 wt % molybdenum, and up to about 0.08 wt % carbon. The austenitic stainless steel particles can have an equivalent nickel content from about 10 wt % to about 15.5 wt %.
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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
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.
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公开(公告)号：US20220152699A1
公开(公告)日：2022-05-19
申请号：US17296964
申请日：2019-08-09
Applicant: Hewlett-Packard Development Company, L.P.
Inventor： Pavan Suri
IPC: B22F1/10 , B33Y10/00 , B33Y40/10 , B33Y40/20 , B33Y70/10 , B22F10/14 , B22F10/34 , B22F1/05 , B22F1/16 , B22F1/145 , B33Y30/00
Abstract: A three-dimensional printing kit can include a binding agent and a particulate build material. The binding agent can include a binder in an aqueous liquid vehicle. The particulate build material can include from about 80 wt % to 100 wt % metal particles that can have a D50 particle size from about 5 μm to about 200 μm. Individual metal particles can include an iron-containing core and can have an oxidation barrier formed thereon. The iron-containing core can include from about 90 wt % to 100 wt % iron. The oxidation barrier can have a stable average thickness from about 0.5% to about 10% of a D50 particle size of the metal particles.
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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
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.
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