US 12,330,218 B2
Method for manufacturing sintered product from three-dimensional object, and 3D shaping inkjet ink
Kenji Tateishi, Gifu (JP); Seizo Obata, Gifu (JP); Yukiko Kobayashi, Nagano (JP); and Kazuki Ohara, Nagano (JP)
Assigned to Gifu Prefecture, Gifu (JP); and MIMAKI ENGINEERING CO., LTD., Nagano (JP)
Appl. No. 17/917,245
Filed by Gifu Prefecture, Gifu (JP); and MIMAKI ENGINEERING CO., LTD., Nagano (JP)
PCT Filed Apr. 2, 2021, PCT No. PCT/JP2021/014398
§ 371(c)(1), (2) Date Oct. 6, 2022,
PCT Pub. No. WO2021/206029, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 2020-069640 (JP), filed on Apr. 8, 2020; and application No. 2020-069641 (JP), filed on Apr. 8, 2020.
Prior Publication US 2023/0150020 A1, May 18, 2023
Int. Cl. B22F 3/16 (2006.01); B22F 3/10 (2006.01); B29C 64/165 (2017.01); B29C 64/209 (2017.01); B33Y 10/00 (2015.01); B33Y 70/10 (2020.01); B33Y 80/00 (2015.01); C09D 11/101 (2014.01); C09D 11/38 (2014.01)
CPC B22F 3/10 (2013.01) [B22F 3/16 (2013.01); B29C 64/165 (2017.08); B29C 64/209 (2017.08); C09D 11/101 (2013.01); C09D 11/38 (2013.01); B33Y 10/00 (2014.12); B33Y 70/10 (2020.01); B33Y 80/00 (2014.12)] 7 Claims
OG exemplary drawing
 
1. A method for manufacturing a sintered product from a three-dimensional object, the method comprising:
a step of forming a multilayer made of an ink containing inorganic particles and an organic material to prepare a three-dimensional object;
a first degreasing step of heating the three-dimensional object at a first average degreasing temperature for a first heating time under an inert gas atmosphere to degrease the organic material;
a second degreasing step of heating the three-dimensional object degreased in the first degreasing step, under an inert gas atmosphere at a second average degreasing temperature higher than the first average degreasing temperature for a second heating time to degrease the organic material to obtain the three-dimensional object having a degreasing percentage in a range of 80% or more and 90% or less; and
a sintering step of sintering the three-dimensional object degreased in the second degreasing step, at an average sintering temperature higher than the second average degreasing temperature to obtain a sintered product.