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1. (WO2018125630) POWDER-BASED ADDITIVE MANUFACTURING TEMPERATURE CONTROL BY SPATIAL LIGHT MODULATION

Pub. No.:    WO/2018/125630    International Application No.:    PCT/US2017/066958
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Tue Dec 19 00:59:59 CET 2017
IPC: B22F 3/105
B32B 17/10
B23Q 17/24
G01N 21/00
B33Y 10/00
B33Y 30/00
B29C 64/00
Applicants: 3D SYSTEMS, INC.
Inventors: HULL, Charles, W.
Title: POWDER-BASED ADDITIVE MANUFACTURING TEMPERATURE CONTROL BY SPATIAL LIGHT MODULATION
Abstract:
Methods and apparatus are provided for controlling the temperature of powders in a powder-based additive manufacturing system using spatial light modulation. Powder layer temperatures can be measured and selectively controlled using a radiation source comprising a spatial light modulator. The spatial light modulator applies a visible light radiation and/or IR radiation. In addition to controlling the pre-fused temperature of the powder in the image plane, the spatial light modulator can also apply the radiation to fuse the powder.