Press-work method and bottomed container
US9421597B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2013 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Oct 22, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K21/16
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A press mold includes an inner punch (23), an intermediate punch (24) disposed along an outer periphery of the inner punch (23) and having an intermediate punch inclined portion (24a) at a leading end, an outer punch (25) disposed along an outer periphery of the intermediate punch (24), and a die (27) having a die inclined portion (27a) facing the intermediate punch inclined portion (24a), central axes (20) of all of which are coaxially disposed. While a bottom portion of a bottomed container (22) is constrained by the inner punch (23) and the die (27), an end portion of the bottomed container (22) is pressed by the outer punch (25), and the intermediate punch (24) is moved in a direction opposite a direction in which the outer punch (25) is pressed, whereby a bottomed container inclined portion (22a) of the bottomed container (22) sandwiched by the intermediate punch inclined portion (24a) and the die inclined portion (27a) is thickened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.