公开(公告)号：US20220355381A1

公开(公告)日：2022-11-10

申请号：US17525718

申请日：2021-11-12

申请人： Desktop Metal, Inc.

发明人： George Hudelson ,  Alexander C Barbati

IPC分类号： B22F10/37 ,  B22F12/63 ,  B33Y10/00 ,  B33Y30/00

摘要： A method of conditioning layers of build material powder for metal additive manufacturing including depositing an amount of build material powder on a work surface, the amount of build material powder having a lower surface separated from an upper surface by a height. A roller is traversed across the work surface in a first direction while rotating the roller in a direction opposed to the first direction. During the step of traversing the roller, a lower surface of the roller extends below the upper surface of the amount of build material powder by a distance. The roller has a surface conditioning configured to, in conjunction with a controlled speed of the rotation of the roller, provide a powder density in a compacted layer within a predetermined powder density range.