Indirect extrusion press
US4463589A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1982 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | May 4, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C23/218
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An indirect extrusion press including a die assembly having a loose die detachably mounted on a die stem and axially movable relative to a billet container for extruding a billet through a die hole, and a die handling mechanism for transferring the die assembly between the press center and a position outside the press machine, the indirect extrusion press including a reduced diameter portion provided in the rear end portion of the die stem and defining a stepped wall portion; a loose die detachably mounted on the end face of the reduced diameter portion; and a detachable cleaning ring loosely fitted on the reduced diameter portion of the die stem in abutting engagement with the stepped wall portion and in axially spaced relation with the loose die, the cleaning ring being in sliding engagement with the inner periphery of the billet container in the extruding phase of the press operation to remove container shells. The press may further include as part of the die handling mechanism a chuck member for releasably gripping the loose die and cleaning ring and movable for transferring the die and ring in spaced relation between the press center and a retracted position outside the press …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.