High performance extruder with a constant number of threads in the inlet and outlet regions of a transfer shearing section
US5147198A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Apr 29, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A pin transfer extruder is provided, wherein the pin-barrel and transfer mixing sections, which are known per se and have only been used individually hitherto, are jointly used in one extruder. Throttle pins, which are disposed in the transfer mixing section in the region of the greatest housing thread volume, permit universal use of the extruder in respect of the extruded material. The combination of both mixing systems permits the throughput of material to be increased in a surprising manner by 60% to 100%, while a constant mixing quality is maintained and the driving torque is halved. The number of the housing and screw flights remains independent of the cross-sectional area of the housing and screw threads because the number of housing and screw threads is constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.