Method and apparatus for high speed extrusion of thermoplastic materials
US4287151A · kind A · utility
16Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1976 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Dec 13, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/912
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In the process of extruding tubular thermoplastic film or tape, the production rate can be improved by using a smooth support plug to stabilize and shape the extrudate after it has been cooled and at least partially solidified. A principal function of the support plug is to assist in supporting the long slender column of partially solidified extrudate which is above the plug. The result is a significant increase in the output of the extrusion process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.