Method and apparatus for producing a workpiece by extrusion molding
US4274276A · kind A · utility
8Cited by
22References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1978 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Jul 31, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/038
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for making a centrosymmetrical spider of a universal joint by extrusion molding involves pressing both end faces of a cylindrical blank the same distance towards the center of the blank to force the blank material radially outwards from the center of the cylindrical blank in a stream which is symmetrical relative to the two end faces and into a cavity of a split mold. Also disclosed is a molding apparatus for practicing the method. The apparatus includes a floating mold. One end of the apparatus can be rigidly fixed to a press for operating the punches which provide the extrusion pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.