公开(公告)号：US20240009739A1

公开(公告)日：2024-01-11

申请号：US17786038

申请日：2020-04-27

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

Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Carlos Eduardo Caballero Diaz

IPC: B22F10/77 ,  B29C64/357 ,  B29C64/393 ,  B22F10/322 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y40/00

CPC classification number: B22F10/77 ,  B29C64/357 ,  B29C64/393 ,  B22F10/322 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y40/00

Abstract: A 3D printing apparatus to dehumidify and recycle a gas from a 3D printer is disclosed herein. The apparatus comprises: a gas inlet to receive a gas flow from a 3D printer, the gas flow comprising gas with evaporated solvents to be cleaned; a heat exchanger to dehumidify the gas flow from the evaporated solvents, the heat exchanger to cool the gas flow by heat transfer to a cold liquid stream from a chiller to saturate and condensate the solvents from the gas flow; a gas outlet to output the dehumidified gas flow back to the 3D printer; and a controller. The controller is to receive a humidity and temperature measurements from a sensor located downstream from the heat exchanger; compare the humidity and temperature measurements with a target humidity and a target temperature respectively; and control a chiller valve from the chiller based on the comparison to adjust the temperature of the gas flow to set an absolute humidity of the gas flow to a predeterminable value.

公开(公告)号：US11712851B2

公开(公告)日：2023-08-01

申请号：US17049589

申请日：2018-10-16

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

Inventor： Rhys Mansell ,  Mohammad Jowkar ,  Vicente Granados Asensio

IPC: B29C64/336 ,  B29C64/329 ,  B29C64/165 ,  B29C64/205 ,  B33Y30/00 ,  B33Y40/00

CPC classification number: B29C64/336 ,  B29C64/165 ,  B29C64/205 ,  B29C64/329 ,  B33Y30/00 ,  B33Y40/00

Abstract: In one example, a material dispensing apparatus comprises a plurality of material containers, wherein the plurality of material containers comprises a first set of material containers arranged to contain a first material and a second set of material containers arranged to contain a second, different, material, and each material container of the second set is located relative to a respective material container of the first set to form a pair of material containers. In use, the material dispensing apparatus is controllable to move across a build platform of an additive manufacturing system. Each of the plurality of material containers comprises an outlet mechanism that is independently controllable, relative to outlet mechanisms of others of the plurality of material containers, such that each pair of material containers selectively dispenses at least a portion of a respective amount of material onto a respective portion of the build platform as the material dispensing apparatus moves across the build platform, such that, collectively, the plurality of material containers forms a complete layer of material on the build platform as the material dispensing apparatus performs a single pass across the build platform.

公开(公告)号：US20220072795A1

公开(公告)日：2022-03-10

申请号：US17309925

申请日：2019-04-30

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

Inventor： Mohammad Jowkar ,  Rhys Mansell ,  Carmen Blasco Cortes

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

Abstract: In an example, a method includes obtaining object model data describing at least a portion of an object to be generated by additive manufacturing. A color value of a first portion of the object to be generated may be determined, wherein the color value is based on a first color and a second color, different from the first color. Object generation data to generate the object using a fusing agent of the first color and a build material having the second color may be determined by defining a first region of a layer of build material to which fusing agent is to be applied defining a second region of the build material to which detailing agent is to be applied to define an edge of the object and defining a spacing region of build material to separate the first region and second region, wherein the spacing region is defined using parameters selected to provide the color value.