Device for indirect extrusion of a hollow section
US4557131A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1983 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Dec 20, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C25/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A device for indirect extrusion of a hollow section from a billet, in particular a hollow aluminum billet, which is presented to a shape-giving orifice of a die, which is such that a container can be passed over it, thus enclosing the die, and features in its orifice a mandrel that determines the inner contour of the hollow section. A shaping recess is provided, with respect to the extrusion direction x, immediately in front of the shape-giving orifice of the die, the radial dimension of which recess is greater than the width of the shape-giving orifice. The shaping recess is provided either in the face of the die directed towards the extrusion stem or in the face of the extrusion stem directed towards face of the die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.