US 12,290,859 B2
Powder application device, method for operating a powder application device, and system for producing a three-dimensional workpiece
Peter Koerner, Luebeck (DE); and Ralf Frank, Luebeck (DE)
Assigned to Nikon SLM Solutions AG, Luebeck (DE)
Appl. No. 17/292,614
Filed by Nikon SLM Solutions AG, Luebeck (DE)
PCT Filed Nov. 6, 2019, PCT No. PCT/EP2019/080384
§ 371(c)(1), (2) Date May 10, 2021,
PCT Pub. No. WO2020/099211, PCT Pub. Date May 22, 2020.
Claims priority of application No. 10 2018 128 242.7 (DE), filed on Nov. 12, 2018.
Prior Publication US 2022/0009000 A1, Jan. 13, 2022
Int. Cl. B22F 12/60 (2021.01); B22F 10/28 (2021.01); B22F 10/32 (2021.01); B22F 10/73 (2021.01); B22F 10/77 (2021.01); B22F 12/50 (2021.01); B22F 12/67 (2021.01); B22F 12/70 (2021.01); B28B 1/00 (2006.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 40/00 (2020.01)
CPC B22F 12/60 (2021.01) [B22F 10/73 (2021.01); B22F 12/50 (2021.01); B22F 12/67 (2021.01); B28B 1/001 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/00 (2014.12); B22F 10/28 (2021.01); B22F 10/32 (2021.01); B22F 10/77 (2021.01); B22F 12/70 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A powder application device for use in a system for producing a three dimensional workpiece using a generative layering process, the powder application device comprising:
a spreading member movable across a surface of a carrier for depositing a raw material powder for producing a workpiece by a generative layering method onto the surface of the carrier, and
a powder entrainer which is movable across a carrier plane and which, in the region of a surface facing the carrier plane, is provided with a surface profile comprising a plurality of entraining elements and a plurality of passage channels arranged between the entraining elements, the plurality of entraining elements and the plurality of passage channels being shaped and arranged in such a way that, with respect to the movement of the powder entrainer across the carrier plane, powdery material deposited in front of the powder entrainer on the carrier plane is entrained by the plurality of entraining elements during a movement of the powder entrainer across the carrier plane in a first direction of movement, and is guided through the plurality of passage channels during a movement of the powder entrainer across the carrier plane in a second direction of movement opposite to the first direction of movement,
wherein at least a part of the plurality of entraining elements is designed to be tapered in the region of a, with respect to the movement of the powder entrainer across the carrier plane in the second direction of movement, front end.