Process and apparatus for extruding a composite section
US4342211A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1981 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Jun 24, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/232
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A composite section comprises a beam-like section which may in particular be made of a light-weight metal, and a facing of at least a part of at least one face of the beam-like section made of another metal. The beam-like part is produced by extruding a billet of metal through a die, and at the same time the facing strip is fed through the shape-giving opening in the die. In order to provide an oxide free surface on the extruded beam-like part which is capable of bonding to the surface of the facing strip it is necessary, when using an unscalped billet, that the ratio of the maximum radius of the feed chamber of the die to the minimum radius of the container passage of the die be less than or equal to 0.8. Inside the die there is provided at least one moving face which may e.g. be in the form of a wheel, over which the facing strip passes in being fed to the die opening. Also the strip can be deformed during feeding or extrusion to provide a variety of shapes. The wheels can be shaped to effect the shaping of the strip. They also reduce friction and wear in the die. Measures are taken to allow easy access to such wheels for ease of repair or for changing the wheels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.