Methods of pressure forming metal containers and the like from preforms having wall thickness gradient
US8683837B2 · kind B2 · utility
6Cited by
5References
40Claims
0Family size
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Key dates
| Filing date | Jan 10, 2011 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Jan 26, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49805
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a bottle-shaped or other contoured metal container by providing a hollow metal preform having a closed end and a wall thickness that decreases progressively in a direction away from the closed end, and subjecting the preform to internal fluid pressure to cause the preform to expand against the wall of a die cavity defining the desired container shape. The method may be employed in pressure-ram-forming procedures wherein a punch is advanced by means of a backing ram into the die cavity to displace and deform the closed end of the preform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.