公开(公告)号：US20210178406A1

公开(公告)日：2021-06-17

申请号：US16077085

申请日：2017-07-27

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

Inventor： Steve RINGWALD ,  David R. OTIS, Jr.

IPC: B04C5/13 ,  B04C5/081 ,  B04C11/00 ,  B29C64/321 ,  B29C64/357 ,  B65G53/60

Abstract: According to examples, a 3D printing system may include a feed line to receive build material particles from a material bin, an air pressure generator to generate airflow inside the feedline to move the build material particles through the feedline, and a cyclone separator to receive the airflow and the build material particles from the feed line and to separate the build material particles from the airflow. The cyclone separator may include a chamber wall, a build material particle discharge opening, and a tapered wall connecting the chamber wall and the build material particle discharge opening. In addition, a ratio between a diameter of the chamber and a diameter of the discharge opening may be between about 1.5 and about 4.0.