CONTAINER MANUFACTURING METHOD AND CONTAINER MANUFACTURING DEVICE

Japanese Patent JP2022057514

A

To provide a container manufacturing method and a container manufacturing device capable of easily manufacturing a container having a trunk formed into a shape getting wider outside toward an upper surface side.SOLUTION: This container manufacturing method is for manufacturing a metal container having a bottom and a trunk with the upper surface side opened, the trunk having a shape getting wider outside toward the upper surface side, and includes an overhang molding step of expanding the diameter of a metal step cup body having a small-diameter cylindrical part having a bottomed cylindrical shape and a large-diameter cylindrical part with the upper surface side connected to the upper end of the small-diameter cylindrical part via a step and opened by operating a diameter expanding punch having a taper pressing part smaller in diameter than the inner diameter of the large-diameter cylindrical part of the step cup body and larger in diameter than the inner diameter of the small-diameter cylindrical part in a cylindrical axis direction from the opening side of the large-diameter cylindrical part. The overhang molding step is executed at least once.SELECTED DRAWING: Figure 3

JPH07121465	[Title of Invention] Method and apparatus for manufacturing tube
WO/2005/123323	METHOD FOR THE PRODUCTION OF A CAN BODY, AND CAN BODY

MURASE TAKESHI
TANAKA SHOTA
SHINOJIMA NOBUHIRO
SATO ERIKA

JP2020165813A

April 11, 2022

September 30, 2020

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TOYO SEIKAN KAISHA LTD

B21D51/26; A47G19/00; B21D22/30; B65D1/00

Nobuo Fujimoto
Keisuke Shigenobu

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