Satellite extruder arrangement and method for the addition of an additive in a polymer melt within a dynamic mixer
US5951159A · kind A · utility
Inventors
Key dates
| Filing date | May 6, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | May 6, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0005
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of mixing of plurality of compounds on a single screw extrusion machine comprises the steps of attaching a barrel of a dynamic mixer apparatus onto the down stream end of a barrel of the extrusion machine, arranging a support shaft in the dynamic mixer apparatus to rotatively carry a plurality of rotors and stators within the dynamic mixer barrel, machining at least one introduction port through the dynamic mixer barrel at a position radially adjacent a rotor and attaching a satellite extrusion mixer to the introduction port so that additives may be introduced at a desired location best suited for the additive. Additionally, the introduction port may used as a withdrawal port to take samples of the mix. Alternately, the rotor of the dynamic mixer may be positioned to present a shaft with a rotor of opposite hand to provide a flow retarding characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.