Two-channel extruder with mixer
US3999921A · kind A · utility
33Cited by
9References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Apr 18, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to an improvement in an extruder with two press screws arranged coaxially in one another in an outer jacket and each carrying a screw thread for feeding various plastic materials, for example, granulated soap, to the press nozzle, where the outer screw is driven while the inner screw is stationary, and where the inner screw is in communication with the charging material in the area of the charging hopper through window-type openings in the outer screw. The said improvement involves a mixing element between the end of the press screws and the extrusion nozzle whereby the two strands being extruded are mixed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.