US 11,872,619 B2
Method for manufacturing laminated steel sheet, apparatus for manufacturing laminated steel sheet, and curable composition used for the same
Ai Omura, Tokyo (JP)
Assigned to THREEBOND CO., LTD., Tokyo (JP)
Appl. No. 17/414,562
Filed by THREEBOND CO., LTD., Tokyo (JP)
PCT Filed Dec. 12, 2019, PCT No. PCT/JP2019/048735
§ 371(c)(1), (2) Date Jun. 16, 2021,
PCT Pub. No. WO2020/129813, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 2018-236173 (JP), filed on Dec. 18, 2018.
Prior Publication US 2022/0055088 A1, Feb. 24, 2022
Int. Cl. B21D 39/03 (2006.01); B21D 28/02 (2006.01); B21D 28/26 (2006.01); C09J 5/02 (2006.01); C09J 133/08 (2006.01); C09J 135/02 (2006.01)
CPC B21D 39/03 (2013.01) [B21D 28/02 (2013.01); B21D 28/26 (2013.01); C09J 5/02 (2013.01); C09J 133/08 (2013.01); C09J 135/02 (2013.01); C09J 2400/166 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for manufacturing a laminated steel sheet comprising a predetermined number of thin steel sheets formed by punching a belt-shaped thin steel sheet into a predetermined shape,
the method for manufacturing the laminated steel sheet comprising:
sequentially punching the belt-shaped thin steel sheet into the predetermined shape with a metallic die to form the thin steel sheets;
applying a curable composition to a predetermined portion of the thin steel sheets;
irradiating the curable composition with energy rays;
laminating the thin steel sheets on which the curable composition has been applied and irradiated; and
fixing the laminated thin steel sheets for a predetermined time after the laminating,
wherein the curable composition is a delayed curable composition which is cured after a lapse of a predetermined time after being irradiated with the energy rays, and
wherein the sequentially punching, the applying, the irradiating, the laminating, and the fixing are performed in this order.