US 12,064,811 B2
Powdery filament composition for 3D printing, 3D printer and method for manufacturing objects additively by using the same 3D printer
Jeong Ho Cho, Seoul (KR); Soo Young Cho, Gyeonggi-do (KR); and Dong Hae Ho, Seoul (KR)
Assigned to UIF (University Industry Foundation), Yonsei University, Seoul (KR)
Filed by UIF (University Industry Foundation), Yonsei University, Seoul (KR)
Filed on Jun. 22, 2022, as Appl. No. 17/847,022.
Claims priority of application No. 10-2021-0080687 (KR), filed on Jun. 22, 2021; and application No. 10-2022-0041563 (KR), filed on Apr. 4, 2022.
Prior Publication US 2023/0022092 A1, Jan. 26, 2023
Int. Cl. B33Y 70/00 (2020.01); B22F 1/05 (2022.01); B22F 1/105 (2022.01); B22F 10/18 (2021.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 40/20 (2020.01); C09D 11/38 (2014.01)
CPC B22F 10/18 (2021.01) [B22F 1/05 (2022.01); B22F 1/105 (2022.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/20 (2020.01); B33Y 70/00 (2014.12); C09D 11/38 (2013.01); B22F 2304/10 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A powdery composition for 3D printing, comprising:
a metal powder;
a multifunctional carboxylic acid salt powder that reacts with water to form a metal-chelate bridge with the surfaces of at least two adjacent metal powders for bonding between the metal powders, and
an alkali metal salt additive that strengthens the bond between metal powders,
wherein the metal powder and the multifunctional carboxylic acid salt powder are mixed in a weight ratio of 90:10 to 75:25, and
wherein the alkali metal salt additive is included in an amount of 2 to 7 wt. % based on the total weight of the powdery composition.