US 11,981,082 B2
Device and method for the generative production of a three-dimensional object
Martin Schade, Munich (DE); Robert Achim Domröse, Germering (DE); Martin Leuterer, Olching (DE); Michael Göth, Munich (DE); Maximilian Mittermüller, Munich (DE); and Markus Kuchenbaur, Munich (DE)
Assigned to EOS GmbH Electro Optical Systems, Krailling (DE)
Appl. No. 16/605,837
Filed by EOS GmbH Electro Optical Systems, Krailling (DE)
PCT Filed Mar. 29, 2018, PCT No. PCT/EP2018/058228
§ 371(c)(1), (2) Date Oct. 17, 2019,
PCT Pub. No. WO2018/192763, PCT Pub. Date Oct. 25, 2018.
Claims priority of application No. 10 2017 206 792.6 (DE), filed on Apr. 21, 2017.
Prior Publication US 2021/0122117 A1, Apr. 29, 2021
Int. Cl. B29C 64/371 (2017.01); B22F 10/28 (2021.01); B22F 10/322 (2021.01); B29C 64/153 (2017.01); B29C 64/393 (2017.01); B22F 10/366 (2021.01); B22F 10/80 (2021.01); B22F 12/70 (2021.01); B22F 12/90 (2021.01); B33Y 10/00 (2015.01); B33Y 50/02 (2015.01)
CPC B29C 64/371 (2017.08) [B22F 10/28 (2021.01); B22F 10/322 (2021.01); B29C 64/153 (2017.08); B29C 64/393 (2017.08); B22F 10/366 (2021.01); B22F 10/80 (2021.01); B22F 12/70 (2021.01); B22F 12/90 (2021.01); B33Y 10/00 (2014.12); B33Y 50/02 (2014.12)] 25 Claims
OG exemplary drawing
 
1. A control method for controlling at least one solidification device of an additive manufacturing device for manufacturing a three-dimensional object by an additive layer build method in which at least one object is manufactured by repeated application of a layer of a building material to a build area and by selective solidification of the applied layer at positions corresponding to a cross-section of the object to be manufactured, wherein a gas having a plurality of flow directions which essentially are not aligned in a same direction flows across the build area, wherein the method comprises for at least one layer to be solidified the following steps:
receiving and/or determining a distribution of the flow directions of the gas above the build area;
assigning a reference flow direction to an area of the build area depending on the distribution of the flow directions above the area;
controlling the solidification device to solidify at least a part of the cross-section of the object to be produced depending on a reference flow direction above the area of the build area in which a respective part of the cross-section is positioned;
dividing at least one section of the build area into a plurality of sub-areas;
for more than one of the sub-areas of the build area, assigning a reference flow direction to each one of the sub-areas; and
controlling the solidification device depending on the respective reference flow direction above the respective sub-area.