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1. (WO2018200594) MOVING A ROD OF BUILD MATERIAL USING A PUSHER IN A 3D PRINTING SYSTEM

Pub. No.:    WO/2018/200594    International Application No.:    PCT/US2018/029231
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Wed Apr 25 01:59:59 CEST 2018
IPC: B33Y 30/00
B33Y 40/00
B29C 64/209
B29C 64/321
Applicants: DESKTOP METAL, INC.
Inventors: BURNHAM, Richard
LAPLANTE, John
PRESTON, Aaron
Title: MOVING A ROD OF BUILD MATERIAL USING A PUSHER IN A 3D PRINTING SYSTEM
Abstract:
A system and corresponding method to move a rod of build material in a three- dimensional (3D) printing system uses a pusher. The rod of build material has distal and proximal ends relative to an extrusion head. The distal and proximal ends having distal and proximal end surfaces, respectively. The pusher engages with the rod and applies an axial force to at least a portion of the distal end surface of the rod for at least a portion of a path the rod travels toward the extrusion head. The axial force actuates the rod of build material without alteration, such as by shaving, fracturing, or otherwise deforming the rod of build material.