Title:
RECTANGULAR CAN MANUFACTURING METHOD AND RECTANGULAR CAN MANUFACTURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/189155
Kind Code:
A1
Abstract:
The present invention provides a rectangular can manufacturing method and rectangular can manufacturing device that suppress non-uniformity in the thickness of long-side walls without increasing manufacturing costs. This rectangular can manufacturing method comprises a drawing-and-ironing step for drawing and ironing a planned cylindrical part section of an intermediate molded product. A die and a punch are formed such that, under conditions where the punch is inserted unloaded into a die processing through-hole (41a), a short-side-direction distance (W1) between a long-side-direction central section of a punch long-side-direction wall machining section (42b) and a die long-side-direction wall machining section (41c) becomes narrower than a short-side-direction distance (W2) between long-side-direction end sections of the punch long-side-direction wall machining section (42b) and the die long-side-direction wall machining section (41c).
Inventors:
TSUKADA KAZUHIKO (JP)
OOHORI KEI (JP)
OSAFUNE TATSUYA (JP)
OGAWA YOUSUKE (JP)
NAKAGAWA TAKANORI (JP)
ONUKI RYUJI (JP)
HANADA RYOSUKE (JP)
OOHORI KEI (JP)
OSAFUNE TATSUYA (JP)
OGAWA YOUSUKE (JP)
NAKAGAWA TAKANORI (JP)
ONUKI RYUJI (JP)
HANADA RYOSUKE (JP)
Application Number:
PCT/JP2023/007710
Publication Date:
October 05, 2023
Filing Date:
March 02, 2023
Export Citation:
Assignee:
TOYO SEIKAN CO LTD (JP)
International Classes:
B21D24/00; B21D51/26
Foreign References:
| JP2012210641A | 2012-11-01 | |||
| JP2018051575A | 2018-04-05 | |||
| JP2020506056A | 2020-02-27 |
Attorney, Agent or Firm:
FUJIMOTO Nobuo et al. (JP)
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