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1. (WO2018200306) ROD FEEDER FOR THREE-DIMENSIONAL (3D) PRINTING

Pub. No.:    WO/2018/200306    International Application No.:    PCT/US2018/028343
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Fri Apr 20 01:59:59 CEST 2018
IPC: B33Y 30/00
B22F 3/00
B33Y 40/00
B29C 64/255
B29C 64/321
Applicants: DESKTOP METAL, INC.
Inventors: TITCHENER, Paul
Title: ROD FEEDER FOR THREE-DIMENSIONAL (3D) PRINTING
Abstract:
An apparatus, and corresponding method, feeds build material, in the form of rods, to a drive system in a three-dimensional (3D) printing system. The apparatus dispenses a rod (150) to a media tray (160) and into a first groove defined by a flipper arm (166). The flipper arm is in a substantially horizontal position supported by a bottom ridge (867) of the media tray. The flipper arm is rotated away from the bottom ridge and toward a stopper (162) coupled to the flipper arm and the media tray. The stopper defines a second groove. The apparatus deposits the rod into the drive system via a feed shaft formed by the first and second grooves of the flipper arm and stopper, respectively. The apparatus enables high-speed 3D printing using the rods by overcoming challenges in loading the rods due to brittleness of the rods.