Extruders for thermoplastics material
US4303344A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1980 |
| Grant date | Dec 1, 1981 |
| Priority date | — |
| Expiry date | Jun 10, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A two stage extruder comprising a first, vertical extruder and a second, horizontal extruder with the working chambers of the two stages connected by a connecting passage and off-set from one another so that each lies at a tangent to the other in a region which is a lower outlet region of the vertical stage and a drawing-in region of the horizontal stage; the vertical stage has a plasticizing portion with a planetary arrangement, a screw shaft supported in a lower axial pressure bearing and a butting ring for the planetary spindles disposed on the screw shaft. A lower cylindrical liner for the vertical stage has an aperture therein and the effective size of the connecting passage can be adjusted by rotating the liner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.