	US 12,186,933 B2
	Method for producing an additively manufactured product from a mineral starting material by means of direct laser sintering, and lightweight part produced by means of said method
David Manjura, Seukendorf (DE)
Assigned to ING3D GmbH, (DE)
Appl. No. 17/634,095
Filed by ING3D GmbH, Fürth (DE)
PCT Filed Aug. 6, 2020, PCT No. PCT/IB2020/057447 § 371(c)(1), (2) Date Feb. 9, 2022, PCT Pub. No. WO2021/028797, PCT Pub. Date Feb. 18, 2021.
Claims priority of application No. 10 2019 005 605.1 (DE), filed on Aug. 9, 2019.
Prior Publication US 2022/0347882 A1, Nov. 3, 2022
Int. Cl. B28B 1/00 (2006.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01)

CPC B28B 1/001 (2013.01) [B33Y 10/00 (2014.12); B33Y 80/00 (2014.12)]

30 Claims

1. A method for producing an open-pore lightweight part (13) by means of 3-D printing or additive manufacturing, characterized in that the open-pore lightweight part (13) is constructed layer by layer, without the use of organic binders or other organic auxiliary agents, from a powdered mineral raw starting material (1) of natural origin that is obtained without chemical alteration of the solid components of the natural material, and wherein, beginning with the second layer, in each case the most recently applied layer is bonded to the surface of the existing body of the lightweight part (27) by means of a laser during direct selective laser sintering that is performed immediately afterward, wherein the powdered mineral raw starting material (1) is perlite.