公开(公告)号：US11007713B2

公开(公告)日：2021-05-18

申请号：US15497832

申请日：2017-04-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John P Spicer ,  Jason J Nolte ,  Thomas A. Perry ,  Blair E Carlson ,  Anil K Sachdev ,  Hyungmin Chae ,  Mark A Smith

IPC: B29C64/20 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/153 ,  B22F12/00 ,  B29C64/241 ,  B29C64/171 ,  B29K105/00

Abstract: An additive manufacturing system includes a powder delivery system, an area scanning laser, a build chamber, and a controller. The powder delivery system provides a predetermined amount of powder material to the build chamber, and includes a material dispenser, a dispensing head, and a scraper. The scanning laser selectively sinters the powder material, and includes a mirror galvanometer for raster scanning. The build chamber has an annular configuration, and includes an inner annular wall that defines a central portion disposed inward of the build chamber. A portion of the delivery system and the laser are located in the central portion. The chamber continuously rotates under the head and under a sintering zone generated by the laser as the delivery system continuously dispenses the material. The laser continuously raster scans the material at the sintering zone in a raster pattern to sinter a layer of material directly to a preceding layer.

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.