Method of extrusion, and extrusion press
US5054303A · kind A · utility
4Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1990 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | May 8, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C27/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In an extrusion press the void space between a pressure pad (4), a billet container (5), an extrusion die (6) and the billet (12) to be extruded is evacuated by suction through the pressure pad (4) and a hollow extrusion stem (3) before the commencement of extrusion. The extrusion ram (2) is hollow and contains a vacuum reservoir (7) connected to the hollow stem by a vacuum line (8) and valve (9). The vacuum line may have a compressed air line (10) and valve (11) connected to it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.