Screw-type plastics extruder
US4085461A · kind A · utility
14Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1976 |
| Grant date | Apr 18, 1978 |
| Priority date | — |
| Expiry date | Jun 4, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/54
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention is a screw-type extruder for plastics comprising a screw in a cylinder providing a feed zone, a plasticizing zone and a homogenization zone. The screw threads in the plasticizing zone are provided with marginal passageways so small as to provide heat exchange between the plastic and the screw, the latter being heated by friction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.