公开(公告)号：US11772162B2

公开(公告)日：2023-10-03

申请号：US17083758

申请日：2020-10-29

Applicant: GM Global Technology Operations LLC

Inventor： Md Ashabul Anam ,  Mark A Smith ,  Tyson W Brown ,  Richard J Skurkis ,  HyungMin Chae ,  Whitney A Poling

IPC: B22F10/00 ,  B22F3/10 ,  B29C64/35 ,  B33Y30/00 ,  B33Y10/00

CPC classification number: B22F10/00 ,  B22F3/1007 ,  B29C64/35 ,  B22F2201/20 ,  B33Y10/00 ,  B33Y30/00

Abstract: A powder bed fusion system includes a powder bed including a build surface and a vacuum system. The vacuum system includes a collection device positioned over the build surface. The collection device includes a body, a pathway defined in the body, wherein the pathway ends in a passageway opening, and a particle retainer connected to the body near the passageway opening. A method of forming a component includes forming a layer of unfused metal powder on a powder bed with a recoater, introducing gas to the powder bed and applying a vacuum with a collection device, fusing a portion of the layer of unfused metal powder on the powder bed with a heat source to form a component layer and generating contaminants, collecting the contaminants from the powder bed with the gas and the vacuum applied by the collection device.