Title:
HOLLOW BODY MOLDING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/095309
Kind Code:
A1
Abstract:
The present invention prevents, in the reform molding of a bottom section (W2), a defect such that blackening occurs at a molding location. A molding device is for a hollow body in which a cylindrical middle section (W1) and a bottom section are integrally formed. The hollow body: includes a recessed dome section (D) in the center of the bottom section; and has formed therein an annular leg section (G) at the perimeter of the dome section. The molding device includes a tool for reform molding the shape of the leg section of the hollow body. The tool includes: a pressing body that is inserted into the hollow body and that makes contact with the inner surface of the dome section; and a molding mold (3) that molds an inward-facing curved end-section (Gp) at the bottom end of the leg section.
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Inventors:
SHINBATA KAZUHIRO (JP)
Application Number:
PCT/JP2020/030889
Publication Date:
May 20, 2021
Filing Date:
August 14, 2020
Export Citation:
Assignee:
TOYO SEIKAN KAISHA LTD (JP)
International Classes:
B21D22/02; B21D22/26; B21D22/28; B21D51/26
Domestic Patent References:
| WO2013118728A1 | 2013-08-15 |
Foreign References:
| JPH09285832A | 1997-11-04 | |||
| JP2013103246A | 2013-05-30 | |||
| JP2018103227A | 2018-07-05 |
Other References:
See also references of EP 4059627A4
Attorney, Agent or Firm:
EICHI PATENT & TRADEMARK CORP. (JP)
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