US 12,434,432 B2
Method and apparatus for producing 3D shaped articles using high-performance radiation emitters
Christoph Scheck, Augsburg (DE); Melanie Weigel, Augsburg (DE); and Alexander Franz Fuchs, Gersthofen (DE)
Assigned to VOXELJET AG, Friedberg (DE)
Appl. No. 17/765,591
Filed by Voxeljet AG, Friedberg (DE)
PCT Filed Oct. 8, 2020, PCT No. PCT/DE2020/000235
§ 371(c)(1), (2) Date Mar. 31, 2022,
PCT Pub. No. WO2021/069003, PCT Pub. Date Apr. 15, 2021.
Claims priority of application No. 102019007073.9 (DE), filed on Oct. 11, 2019.
Prior Publication US 2022/0402203 A1, Dec. 22, 2022
Int. Cl. B29C 64/165 (2017.01); B29C 64/282 (2017.01); B29C 64/286 (2017.01); B29C 64/291 (2017.01); B29C 64/30 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01)
CPC B29C 64/165 (2017.08) [B29C 64/282 (2017.08); B29C 64/286 (2017.08); B29C 64/291 (2017.08); B29C 64/30 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12)] 20 Claims
OG exemplary drawing
 
1. A radiation-emitting set, suitable for a 3D printing apparatus, wherein the radiation-emitting set comprises a plurality of radiation-emitting units which are mounted on a holder and wherein each radiation-emitting unit is mounted on the holder at a defined angle of rotation alpha and the radiation-emitting units have different or the same defined angle(s) of rotation alpha or one or more radiation-emitting units have one defined angle of rotation alpha (group 1) and one or more radiation-emitting units have another defined angle of rotation alpha (group 2) and the radiation-emitting units are combined with one or more coolers;
wherein each radiation-emitting unit is an elongated structure having an axis;
wherein the defined angle of rotation alpha for each radiation-emitting unit is a rotation of the axis of the radiation-emitting unit about a z-axis, is measured relative to a y axis, and is an acute angle;
wherein at least one angle of rotation alpha in a peripheral area of the radiation-emitting set is larger than in an interior area of the radiation-emitting set.