Method and apparatus for extrusion
US5068068A · kind A · utility
27Cited by
6References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 22, 1989 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Nov 22, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An improved method for carrying out an extrusion is provided, wherein an extrusion material in a flowable state is passed through a die under a pressure to impart a desired shape thereto, and the extrusion is carried out while the die is resonated by an ultrasonic wave in such a manner that the resonance occurs at an n wavelength, wherein n is m/2 and m is a positive integer. Further, an apparatus suitable for carrying out this extrusion method is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.