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Patent Searching and Data


Title:
CONTAINER MANUFACTURING METHOD AND CONTAINER MANUFACTURING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/070577
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a container manufacturing method and a container manufacturing device with which a container having a trunk part that has a shape which widens outward going toward the upper surface side can be easily manufactured. This container (100) manufacturing method is a method for manufacturing a metal container which includes a bottom part (120) and a trunk part (110) and has an open upper surface side, and in which the trunk part has a shape which widens outward going toward the upper surface side, the method comprising an overhang molding step in which a metal step cup body (200), which has a small-diameter cylindrical part (260) having a bottomed cylindrical shape and a large-diameter cylindrical part (280) which has a cylindrical shape where the upper surface side opens and which continues to an upper end of the small-diameter cylindrical part via a step (270), is widened in diameter by causing a widened-diameter punch (300), which has a tapered pressing part (340) the diameter of which is smaller than the inner diameter of the large-diameter cylindrical part of the step cup body and larger than the inner diameter of the small-diameter cylindrical part, to act along a cylinder axis direction from the opening side of the large-diameter cylindrical part, wherein the overhang molding step is performed at least once.

Inventors:
MURASE TAKESHI (JP)
TANAKA SHOUTA (JP)
SASAJIMA NOBUHIRO (JP)
SATO ERIKA (JP)
Application Number:
PCT/JP2021/028057
Publication Date:
April 07, 2022
Filing Date:
July 29, 2021
Export Citation:
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Assignee:
TOYO SEIKAN KAISHA LTD (JP)
International Classes:
B21D51/26; A47G19/00; B21D22/26; B21D22/30; B65D1/00
Foreign References:
JPH02104423A1990-04-17
JP2006224113A2006-08-31
JP2004202541A2004-07-22
JPH01150418A1989-06-13
Attorney, Agent or Firm:
FUJIMOTO Nobuo et al. (JP)
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