公开(公告)号：US20210339470A1

公开(公告)日：2021-11-04

申请号：US17256674

申请日：2019-01-23

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

Inventor： Sunil Kothari ,  Tod Heiles ,  Luke Bockman ,  Gary J. Dispoto ,  Md Abdullah Al Hafiz Khan ,  Todd Goyen

IPC: B29C64/188 ,  B29C64/218 ,  B29C64/393 ,  B29C64/209 ,  B29C64/268 ,  B29C64/165 ,  B33Y50/02 ,  B33Y40/20 ,  G06T7/00

Abstract: A system for detecting three-dimensional (3D) part drag includes an infrared image capture device to capture a plurality of thermal images of a 3D part build region of a 3D printing device on which a part is built, and an image analysis module to detect drag of the part based on a difference image produced by subtracting a first thermal image from a second thermal image.

公开(公告)号：US20210205887A1

公开(公告)日：2021-07-08

申请号：US17054594

申请日：2018-09-26

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

Inventor： Wei Huang ,  Gary J. Dispoto

IPC: B22F10/14 ,  B29C64/165 ,  B29C33/38 ,  B29C33/44 ,  B33Y10/00 ,  B33Y80/00

Abstract: Three dimensional (3D) printed molds having breakaway features are disclosed. An example method for forming a mold having a cavity by creating a plurality of layers using an additive manufacturing process includes providing a build material and varying a fusion level applied to the build material to form a first fused area and a second fused area on a layer of the mold, the second fused area is to define a breakaway feature of the mold.

公开(公告)号：US20200262155A1

公开(公告)日：2020-08-20

申请号：US16607379

申请日：2017-10-25

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

Inventor： Wei Huang ,  Gary J. Dispoto

IPC: B29C64/40 ,  B29C64/393 ,  B29C64/165

Abstract: According to examples, a three-dimensional (3D) fabrication system may include a controller that may control an agent delivery system to deposit a fusing agent onto a fusing area of a layer of particles of build material. The controller may also control the agent delivery system to deposit an energy absorbing agent onto an unfused thermal support area of the layer of particles, the unfused thermal support area being located adjacent to the fusing area. The controller may further control an energy supply system to supply energy, in which supply of the energy is to cause the particles on which the fusing agent has been deposited to melt and a temperature of the particles in the unfused thermal support area to be raised to a level that is below a melting point temperature of the particles.

公开(公告)号：US10373371B2

公开(公告)日：2019-08-06

申请号：US15523331

申请日：2015-01-30

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

Inventor： Jun Zeng ,  Pu Huang ,  Sebastia Cortes ,  Scott A. White ,  Gary J. Dispoto

IPC: B33Y30/00 ,  B33Y50/00 ,  B29C64/386 ,  G06T17/00 ,  G06F17/50

Abstract: An example technique for generating slice data from the tree data structure representation of a three dimensional (3-D) object can include obtaining a shape specification of the 3-D object and obtaining a material specification of the 3-D object. The example technique for generating slice data from the tree data structure representation of a 3-D object can also include merging the shape specification and the material specification to create a tree data structure representation of the 3-D object. The example technique for generating slice data from the tree data structure representation of a 3-D object can also include generating slice data from the tree data structure.

公开(公告)号：US11628627B2

公开(公告)日：2023-04-18

申请号：US16629632

申请日：2017-07-18

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

Inventor： Wei Huang ,  Steven J. Simske ,  Gary J. Dispoto

IPC: B29C64/40 ,  B29C64/112 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y70/00 ,  B33Y50/02

Abstract: In an example, a method is described that includes generating a model for fabricating an item via an additive manufacturing process. The model includes a first region defining the item and a second region defining a sacrificial artifact whose presence disguises a physical characteristic of the item. The item and the sacrificial artifact are then fabricated in a common build batch via the additive manufacturing process.

公开(公告)号：US11597143B2

公开(公告)日：2023-03-07

申请号：US16075878

申请日：2017-04-19

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

Inventor： Wei Huang ,  Steven J. Simske ,  Gary J. Dispoto

IPC: B29C64/165 ,  B33Y40/00 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: In an example, a method is described that includes generating a model for fabricating an object via an additive manufacturing process. The model includes a first region defining the object and a second region defining a sacrificial artifact. The object is fabricated via the additive manufacturing process, using a fusing printing fluid. The sacrificial artifact is fabricated simultaneously with fabricating the object, via the additive manufacturing process, using a non-fusing printing fluid.

公开(公告)号：US11577463B2

公开(公告)日：2023-02-14

申请号：US17256691

申请日：2019-03-15

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

Inventor： Wei Huang ,  Gary J. Dispoto ,  Craig Peter Sayers

IPC: B29C64/386 ,  B33Y50/00 ,  G05B19/4099

Abstract: In an example, a method includes operating, by a processor, on object model data and operating, on a processor, on pattern data. The object model data describes at least part of an object to be generated in additive manufacturing and the pattern data describes an object pattern intended to be formed on at least a portion of the part of the object to be generated in additive manufacturing. The method includes determining, by a processor, control data to control a print agent applicator to apply a pattern of fusing agent onto a part of a layer of build material. The pattern of fusing agent comprises a fusing agent area and a gap area that lacks fusing agent. The gap area corresponds to the object pattern such that no fusing agent is applied to a part of the layer of build material that corresponds to the object pattern.

公开(公告)号：US11511486B2

公开(公告)日：2022-11-29

申请号：US17256674

申请日：2019-01-23

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

Inventor： Sunil Kothari ,  Tod Heiles ,  Luke Bockman ,  Gary J. Dispoto ,  Md Abdullah Al Hafiz Khan ,  Todd Goyen

IPC: B29C64/188 ,  B33Y50/02 ,  B29C64/209 ,  B29C64/393 ,  B29C64/268 ,  B29C64/165 ,  B29C64/218 ,  B33Y40/20 ,  G06T7/00 ,  B33Y10/00 ,  B33Y30/00

Abstract: A system for detecting three-dimensional (3D) part drag includes an infrared image capture device to capture a plurality of thermal images of a 3D part build region of a 3D printing device on which a part is built, and an image analysis module to detect drag of the part based on a difference image produced by subtracting a first thermal image from a second thermal image.

公开(公告)号：US20220276634A1

公开(公告)日：2022-09-01

申请号：US17640995

申请日：2019-10-23

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

Inventor： Wei Huang ,  Gary J. Dispoto ,  Guy Adams

IPC: G05B19/4099

Abstract: Examples described herein relate to a system consistent with the disclosure. For instance, the system may comprise an additive manufacturing device including hardware to form a three-dimensional (3D) model, a memory resource, and a processing resource to receive data related to the 3D model, modify the data related to the 3D model to include a protective structure connected to the 3D model by a fusion bond, and dispense, based on the modified data, a printing agent onto build material layers to produce the 3D model and the protective structure around a portion of the 3D model.

公开(公告)号：US11426943B2

公开(公告)日：2022-08-30

申请号：US16472929

申请日：2017-04-19

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

Inventor： Sunil Kothari ,  Tod Heiles ,  Juan Carlos Salazar ,  Goffril Obegi ,  Jun Zeng ,  Gary J. Dispoto

IPC: B29C64/393 ,  B29C64/165 ,  B29C64/295 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02

Abstract: A control and feedback technique to determine the proper location of powder control temperature regions includes detecting solid parts having specified shape and thermal characteristics. The solid parts are generated by a 3D printer. The solid parts include powder material fused on a layer by layer basis. A powder control temperature region is selected in each layer of powder material, wherein the region is located in unfused powder material adjacent to the solid parts, and wherein the region is selected based on characteristics of the shape of a build area and thermal imaging associated with any of a structural formation of the solid parts adjacent to the region, and an amount of thermal energy radiated by the solid parts adjacent to the region. The amount of thermal energy to cause fusing of the powder material on each subsequent layer is modified based on location of the powder control temperature region.