US 12,172,236 B2
Production of three-dimensional workpieces by means of a plurality of irradiation units
Toni Adam Krol, Luebeck (DE); Andreas Wiesner, Luebeck (DE); Christiane Thiel, Luebeck (DE); Lukas Roesgen, Luebeck (DE); Felix Mutz, Luebeck (DE); Naveed Iqbal, Luebeck (DE); Jan Wilkes, Luebeck (DE); Karsten Huebinger, Luebeck (DE); Dieter Schwarze, Luebeck (DE); Simon Steven, Luebeck (DE); and Arne Neef, Luebeck (DE)
Assigned to Nikon SLM Solutions AG, Luebeck (DE)
Filed by SLM Solutions Group AG, Luebeck (DE)
Filed on Mar. 29, 2019, as Appl. No. 16/369,388.
Application 16/369,388 is a continuation of application No. PCT/EP2017/074184, filed on Sep. 25, 2017.
Claims priority of application No. 10 2016 218 887.9 (DE), filed on Sep. 29, 2016.
Prior Publication US 2019/0224913 A1, Jul. 25, 2019
Int. Cl. B29C 64/00 (2017.01); B22F 12/45 (2021.01); B23K 26/354 (2014.01); B29C 64/153 (2017.01); B29C 64/20 (2017.01); B29C 64/277 (2017.01); B33Y 30/00 (2015.01); B22F 10/28 (2021.01); B22F 12/13 (2021.01)
CPC B23K 26/354 (2015.10) [B22F 12/45 (2021.01); B29C 64/153 (2017.08); B29C 64/20 (2017.08); B29C 64/277 (2017.08); B33Y 30/00 (2014.12); B22F 10/28 (2021.01); B22F 12/13 (2021.01); Y02P 10/25 (2015.11)] 14 Claims
OG exemplary drawing
 
1. A device for producing three-dimensional workpieces, wherein the device comprises:
a build surface which is adapted to receive a molding compound; and
an irradiation arrangement which is adapted to selectively irradiate the molding compound on the build surface with electromagnetic radiation in order to produce a workpiece by means of an additive layer manufacturing activity,
wherein the irradiation arrangement comprises a plurality of irradiation units which are arranged stationarily within the irradiation arrangement and are unmovable parallel to the build surface,
wherein the irradiation units are adapted to irradiate a respective associated individual region of the build surface,
wherein the emitted beams of the irradiation units each have a cross-sectional area which corresponds to between 2% and 170% of the area of the respective associated individual region,
wherein the irradiation units are adapted to emit the beams at an unchanged angle to generate predetermined irradiation patterns on the build surface according to a workpiece layer currently to be produced,
wherein the irradiation arrangement comprises at each of its outer regions a fluid conducting region for generating a protective gas flow.