Metal extrusion process and extrusion press
US5613393A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1994 |
| Grant date | Mar 25, 1997 |
| Priority date | — |
| Expiry date | May 6, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C27/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for extrusion of a metal billet placed in a container delimiting a housing for the billet. One end of the container is closed by a closing bottom and the other end by a dummy block. Before extrusion, the billet is pre-compressed in order to apply it against the inner face of the housing. At the start of the pre-compression, a limited play is maintained between the closing bottom and the corresponding end of the container, preventing the container from approaching the closing bottom during pre-compression so as to allow evacuation of air contained between the billet and the inner housing face during expansion of the billet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.