US 11,833,749 B2
Method for producing a treated, 3D printed object
Dirk Achten, Leverkusen (DE); Thomas Buesgen, Leverkusen (DE); Roland Wagner, Leverkusen (DE); Jonas Kuenzel, Leverkusen (DE); Michael Kessler, Cologne (DE); and Bettina Mettmann, Dormagen (DE)
Assigned to STRATASYS, INC., Eden Prairie, MN (US)
Appl. No. 16/763,591
Filed by Covestro Deutschland AG, Leverkusen (DE)
PCT Filed Dec. 18, 2018, PCT No. PCT/EP2018/085547
§ 371(c)(1), (2) Date May 13, 2020,
PCT Pub. No. WO2019/121718, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 17208280 (EP), filed on Dec. 19, 2017.
Prior Publication US 2020/0306829 A1, Oct. 1, 2020
Int. Cl. B29C 64/165 (2017.01); B22F 1/105 (2022.01); B29C 64/30 (2017.01); B29C 71/02 (2006.01); B33Y 40/20 (2020.01); B22F 10/14 (2021.01); B33Y 10/00 (2015.01); B22F 10/38 (2021.01); B22F 10/62 (2021.01)
CPC B29C 64/165 (2017.08) [B22F 1/105 (2022.01); B22F 10/14 (2021.01); B29C 64/30 (2017.08); B29C 71/02 (2013.01); B33Y 40/20 (2020.01); B22F 10/38 (2021.01); B22F 10/62 (2021.01); B22F 2302/253 (2013.01); B22F 2302/256 (2013.01); B29C 2071/027 (2013.01); B33Y 10/00 (2014.12)] 13 Claims
 
1. A method of producing a treated article, comprising:
applying a layer of particles to a target surface, wherein at least some of the particles include a fusible polymer;
selectively binding particles of the layer by applying a liquid binder to a selected portion of the layer corresponding to a cross section of an article, wherein the liquid binder binds the particles in the selected portion to form a bonded portion;
repeating the steps of applying particles and selectively binding particles for a multitude of layers, wherein the repeating further comprises binding bonded portions of adjacent layers to obtain a bonded article; and
contacting at least a portion of the bonded article with a liquid heated to >T or a powder bed heated to >T and sintering the portion of the bonded article to form a treated article, wherein T is a temperature of >25° C., wherein the liquid is not a solvent or coreactant for the liquid binder and the fusible polymer, and the powder bed is different than the particles of the fusible polymer.