US 12,115,721 B2
Device and method for generatively producing a three-dimensional object
Franz-Josef Kerl, Kumhausen (DE); Sebastian Mehl, Puchheim (DE); and Alexander Schilling, Wildpoldsried (DE)
Assigned to EOS GmbH Electro Optical Systems, Krailling (DE)
Appl. No. 17/252,478
Filed by EOS GmbH Electro Optical Systems, Krailling (DE)
PCT Filed Jun. 21, 2019, PCT No. PCT/EP2019/066440
§ 371(c)(1), (2) Date Dec. 15, 2020,
PCT Pub. No. WO2019/243559, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 102018210260.0 (DE), filed on Jun. 22, 2018.
Prior Publication US 2021/0252601 A1, Aug. 19, 2021
Int. Cl. B33Y 10/00 (2015.01); B22F 10/28 (2021.01); B22F 10/32 (2021.01); B22F 10/322 (2021.01); B22F 12/41 (2021.01); B22F 12/44 (2021.01); B22F 12/49 (2021.01); B22F 12/70 (2021.01); B29C 64/153 (2017.01); B33Y 30/00 (2015.01); B33Y 40/00 (2020.01); B22F 12/00 (2021.01)
CPC B29C 64/153 (2017.08) [B22F 10/28 (2021.01); B22F 10/32 (2021.01); B22F 10/322 (2021.01); B22F 12/41 (2021.01); B22F 12/70 (2021.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/00 (2014.12); B22F 12/224 (2021.01); B22F 12/44 (2021.01); B22F 12/49 (2021.01)] 16 Claims
OG exemplary drawing
 
1. A flow device for a device for producing a three-dimensional object by a layer-wise selective solidification of a building material at locations corresponding to the cross-section of the object to be produced in the respective layer by irradiation by means of an energetic radiation, comprising:
a gas conveying device for generating a gas stream,
a process chamber with a build area for building the object,
wherein the process chamber at least comprises a first gas inlet for introducing a gas stream into the process chamber and a first gas outlet and a second gas outlet for discharging a gas stream from the process chamber, wherein the second gas outlet is spaced from the first gas outlet,
wherein the first gas outlet is arranged closer to the build area than the second gas outlet in a direction perpendicular to the build area, and
wherein the first gas outlet is provided substantially within a first height range of the process chamber with respect to its extension in a direction perpendicular to the build area and the second gas outlet is provided substantially within a second height range of the process chamber with respect to its extension in a direction perpendicular to the build area, wherein the first height range of the process chamber corresponds to a lower third of a distance of the build area from a process chamber ceiling and the second height range of the process chamber corresponds to the upper four fifths of the distance of the build area from the process chamber ceiling.