Title:
缶体の製造方法
Document Type and Number:
Japanese Patent JP7089398
Kind Code:
B2
Abstract:
To provide a manufacturing method of a can body capable of shortening a manufacturing process of the can body, and capable of stably forming a diameter reduction shape smoothly connected to a wide area along the can axis direction.SOLUTION: A diameter reduction part molding process comprises a preliminary forming process of forming a preliminary diameter reduction part of forming respective local part diameter reduction parts at an interval, by forming a local part diameter reduction part molded by respective diameter reduction metal molds by dislocating a position over to the upper side from the lower side, every time when applying the diameter reduction processing, by dividedly executing diameter reduction processing in a plurality of times while gradually reducing a processing diameter of a molding surface of the diameter reduction metal mold and a remolding process of forming the diameter reduction part having a smoothly continued outer surface by successively remolding by push-crushing an area wider than the interval of the respective local part diameter reduction parts downward in the can axis direction by respective remolding metal molds every time when applying remolding processing by dividedly executing remolding processing in a plurality of times while gradually reducing a processing diameter of the molding surface of the remolding metal mold after the preliminary forming process.SELECTED DRAWING: Figure 1
Inventors:
Atsushi Yamashita
Yoshino Masuhiro
Yoshino Masuhiro
Application Number:
JP2018078840A
Publication Date:
June 22, 2022
Filing Date:
April 17, 2018
Export Citation:
Assignee:
Universal Can Corporation
International Classes:
B21D51/26
Domestic Patent References:
| JP2016147310A | ||||
| JP2016107341A |
Foreign References:
| US5778723 | ||||
| US20160107219 |
Attorney, Agent or Firm:
Masakazu Aoyama
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