Title:
SQUARE CAN MANUFACTURING METHOD AND SQUARE CAN MANUFACTURING DEVICE
Document Type and Number:
Japanese Patent JP2023149445
Kind Code:
A
Abstract:
To provide a square can manufacturing method and a square can manufacturing device that suppress occurence of ununiformity in thickness of a long side wall without increasing cost of manufacture.SOLUTION: A square can manufacturing method includes a drawing and ironing process in which drawing and ironing are performed for a planned cylindrical part of an intermediate molded product. A die and a punch are formed so that in the state that the punch is inserted in a die processing open hole 41a in an unloaded condition, a short side direction interval W1 between a long side direction center part of a punch long side wall processing part 42b and a die long side wall processing part 41c becomes narrower than a short side direction interval W2 between long side direction both end parts of the punch long side wall processing part 42b and the die long side wall processing part 41c.SELECTED DRAWING: Figure 6
Inventors:
TSUKADA KAZUHIKO
OHORI KEI
NAGAFUNE TATSUYA
OGAWA YOSUKE
NAKAGAWA TAKANORI
ONUKI RYUJI
HANADA RYOSUKE
OHORI KEI
NAGAFUNE TATSUYA
OGAWA YOSUKE
NAKAGAWA TAKANORI
ONUKI RYUJI
HANADA RYOSUKE
Application Number:
JP2022058021A
Publication Date:
October 13, 2023
Filing Date:
March 31, 2022
Export Citation:
Assignee:
TOYO SEIKAN KAISHA LTD
International Classes:
B21D24/00
Attorney, Agent or Firm:
Nobuo Fujimoto