Can body forming device

Patent metadata

Field	Value
Publication number	US-12233446-B2
Application number	US-202017774286-A
Country	US
Kind code	B2
Filing date	Aug 14, 2020
Priority date	Nov 11, 2019
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

In reforming a can bottom part, the defect of black discoloration in an associated formed portion is suppressed. A forming device for a can body, in which a cylindrical barrel part and a can bottom part are integrally formed, includes a tool used for the can body having a concave dome part in a center of the can bottom part and having an annular leg part on a periphery of the dome part to reform a shape of the leg part. The tool includes a pressing body that is inserted into the can body, and that abuts on an inner surface of the dome part, and a forming die that forms a curved end part heading inward on a lower end part of the leg part.

First claim

What is claimed is:

1. A can body forming device for forming a can body in which a cylindrical barrel part and a can bottom part are integrally formed, the can body forming device comprising:
a tool used for the can body having a concave dome part in a center of the can bottom part and having an annular leg part formed on a periphery of the dome part to reform a shape of the leg part,
wherein the tool includes: a pressing body that is inserted into the can body, and that abuts on an inner surface of the dome part; and a forming die that forms a curved end part heading inward on a lower end part of the leg part, and
wherein an air jetting part for causing the can bottom part to abut on an abutting surface of the pressing body is provided in a center part of the forming die.

2. The can body forming device according to claim 1 , further comprising:
a can body support part that supports a periphery of the cylindrical barrel part; and
a stop part that receives an upper end of the can body when the can body that has the formed curved end part is separated from the pressing body.

3. The can body forming device according to claim 2 , further comprising:
a forming turret including, about a rotation axis, multiple pairs each composed of the pressing body and the forming die.

4. The can body forming device according to claim 1 , further comprising:
a forming turret including, about a rotation axis, multiple pairs each composed of the pressing body and the forming die.

Assignees

• Toyo Seikan Co Ltd

Inventors

• SHINBATA Kazuhiro

Classifications

• B21D51/26

  cans or tins; Closing same in a permanent manner (making outlet arrangements B21D51/38; welding or soldering B23K) · CPC title

• B21D22/28

  of cylindrical articles using consecutive dies · CPC title

• B21D22/30

  to finish articles formed by deep-drawing · CPC title

• B21D22/20

  Deep-drawing (special deep-drawing arrangements in, or in connection with, presses B21D24/00) · CPC title

• B21D37/10

  Die sets; Pillar guides · CPC title