US 12,479,199 B2
Bonded and stacked core manufacturing method and bonded and stacked core manufacturing apparatus
Kazutoshi Takeda, Tokyo (JP); Shinsuke Takatani, Tokyo (JP); Ryu Hirayama, Tokyo (JP); Minako Fukuchi, Tokyo (JP); Yoshiaki Iwase, Nagoya (JP); Makoto Niwa, Nagoya (JP); and Makoto Hirakawa, Nagoya (JP)
Assigned to NIPPON STEEL CORPORATION, Tokyo (JP); and TOAGOSEI CO., LTD., Tokyo (JP)
Appl. No. 18/286,501
Filed by NIPPON STEEL CORPORATION, Tokyo (JP); and TOAGOSEI CO., LTD., Tokyo (JP)
PCT Filed Apr. 13, 2022, PCT No. PCT/JP2022/017706
§ 371(c)(1), (2) Date Oct. 11, 2023,
PCT Pub. No. WO2022/220264, PCT Pub. Date Oct. 20, 2022.
Claims priority of application No. 2021-068108 (JP), filed on Apr. 14, 2021.
Prior Publication US 2024/0190119 A1, Jun. 13, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. B32B 37/12 (2006.01); B30B 9/28 (2006.01); B32B 7/12 (2006.01); B32B 15/04 (2006.01); B32B 15/18 (2006.01); B32B 37/10 (2006.01); C09J 5/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); H02K 1/02 (2006.01); H02K 15/02 (2025.01)
CPC B32B 37/12 (2013.01) [B30B 9/28 (2013.01); B32B 7/12 (2013.01); B32B 15/043 (2013.01); B32B 15/18 (2013.01); B32B 37/10 (2013.01); C09J 5/02 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); H02K 1/02 (2013.01); H02K 15/02 (2013.01); B32B 2309/12 (2013.01); B32B 2311/30 (2013.01); C22C 2202/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A bonded and stacked core manufacturing method for manufacturing a bonded and stacked core by performing press working on a strip-shaped steel sheet with a press working oil applied to one surface or both surfaces thereof, applying an adhesive to one surface of the strip-shaped steel sheet and punching out a plurality of steel sheet components, and stacking and bonding the steel sheet components, wherein
a curing accelerator having an average viscosity of 0.01 Pa·s to 100 Pa·s is applied to one surface or both surfaces of the strip-shaped steel sheet before the press working oil is applied.