Title:
キャップシェル成形用ダイ、キャップシェル成形装置、およびキャップシェル成形方法
Document Type and Number:
Japanese Patent JP7085799
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent leakage or running off of a cap body from a can body because of impaired sealability when increasing inner pressure in a case of decreasing a thickness of the cap body in association with decreasing a thickness of a can body of a bottle can, and deformation at a mouthpiece part when forming a female screw part at a peripheral wall part at the time of capping.SOLUTION: A cap shell molding die 1 with a die body 2 where a die hole 2a is formed is given in which a metal plate is subjected to drawing work between the die and a punch inserted into the die hole 2a, thereby molding a bottomed cylindrical cap shell manufactured in the cap. A cross ridge line part between an inner peripheral surface 2b of the die hole 2a and an edge face 2c of the die body 2 facing an insertion direction F of the punch includes a convex-curved chamfering part 2d formed at a cross section along a center line O of the die hole 2a. A curvature radius R of the chamfering part 2d is between 0.7 mm and 1.3 mm.SELECTED DRAWING: Figure 1
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Inventors:
Eiji Yamamoto
Munetaka Ida
Munetaka Ida
Application Number:
JP2017069029A
Publication Date:
June 17, 2022
Filing Date:
March 30, 2017
Export Citation:
Assignee:
Universal Can Corporation
International Classes:
B21D24/16; B21D22/28; B21D51/50
Domestic Patent References:
| JP2303634A | ||||
| JP2006224113A | ||||
| JP2013514185A | ||||
| JP2006347600A |
Foreign References:
| GB203976A | ||||
| US4823537 |
Attorney, Agent or Firm:
Yasushi Matsunuma
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami
Mitsuo Teramoto
Fumihiro Hosokawa
Kazunori Onami