Forming of materials by extrusion
US4055979A · kind A · utility
14Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1976 |
| Grant date | Nov 1, 1977 |
| Priority date | — |
| Expiry date | Jun 7, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C23/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus for performing extrusion has a rotatable wheel member with an endless groove in its periphery, a second member fixed relative to the wheel member and co-operating therewith to define a passageway therebetween, an abutment member fixed relative to the wheel member and projecting into said groove to block it, die orifice means associated positionally with said abutment member and leading from said passageway, and means for prestressing the material constituting at least the walls of the endless groove for avoiding any fatigue failure problems of the wheel member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.