Homogenization extruder
US4152077A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1977 |
| Grant date | May 1, 1979 |
| Priority date | — |
| Expiry date | Dec 2, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2948/92885
- 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 journalled therein and having several mixing and cooling sections set thereon in succession. 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 bore includes a plurality of annular grooves of symmetrical or non-symmetrical cross-sectional configurations along the axis of the bore which grooves are slightly displaced in the bore with respect to the annular restrictions disposed on the rotor. The rotor, however, is axially displaceable to permit variations in the mixing intensity upon the extrudite being worked, by allowing the annular restrictions on the rotor to be controllably juxtaposed with the annular grooves in the bore of the extruder machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.