US 12,269,092 B2
Apparatus and method for forming a three-dimensional article
Safdar Ali, Gothenburg (SE); and Kristofer Karlsson, Kungsbacka (SE)
Assigned to Arcam AB, Mölnlycke (SE)
Appl. No. 17/296,590
Filed by Arcam AB, Mölnlycke (SE)
PCT Filed Mar. 1, 2019, PCT No. PCT/EP2019/055155
§ 371(c)(1), (2) Date May 25, 2021,
PCT Pub. No. WO2020/108801, PCT Pub. Date Jun. 4, 2020.
Prior Publication US 2022/0001452 A1, Jan. 6, 2022
Int. Cl. B22F 10/85 (2021.01); B22F 10/28 (2021.01); B22F 10/368 (2021.01); B22F 12/41 (2021.01); B22F 12/44 (2021.01); B33Y 10/00 (2015.01); H01J 37/09 (2006.01); H01J 37/21 (2006.01); H01J 37/305 (2006.01); B22F 12/00 (2021.01); B22F 12/49 (2021.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01)
CPC B22F 10/85 (2021.01) [B22F 10/28 (2021.01); B22F 10/368 (2021.01); B22F 12/41 (2021.01); B22F 12/44 (2021.01); B33Y 10/00 (2014.12); H01J 37/09 (2013.01); H01J 37/21 (2013.01); H01J 37/305 (2013.01); B22F 12/38 (2021.01); B22F 12/49 (2021.01); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12); H01J 2237/0266 (2013.01); H01J 2237/3128 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for forming a three-dimensional article through successively depositing individual layers of powder material that are fused together, the apparatus comprising:
a chamber having a first section and a second section openly connected to each other, the first section configured to receive the individual layers of powder material that are fused together, the second section comprising an electron beam source, an electromagnetic focus coil having an axially extending, and a reflector coil, wherein the electron beam source is configured to emit an electron beam to fuse the individual layers of powder material;
wherein the reflector coil is arranged radially outside the electromagnetic focus coil between the electromagnetic focus coil and an electron beam housing, wherein a direction of windings of the reflector coil is opposite a direction of windings of the electromagnetic focus coil.