Adjustable homogenization extruder
US4213710A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1978 |
| Grant date | Jul 22, 1980 |
| Priority date | — |
| Expiry date | Sep 26, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An extruder machine for processing thermoplastic materials such as low density polyethylene, the extruder incorporating a body having a bore therethrough with a rotor or screw journalled therein. The rotor has several successive mixing and pumping sections. The mixing sections on the rotor are multiple flighted defining primary and secondary channels having their discharge and entrances respectively blocked or restricted by annular dam arrangements. The rotor includes a plurality of adjustable dams, arranged across the channels, permitting a variation in the degree of homogenization which may be performed upon the extrudite. The dams may be radially displaceable to vary the distance between the radially outer surface of the dam and the surface of the bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.