Twin screw extruder

Details Twin screw extruder Twin screw extruder

1989-06-15

1991-03-19

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264349, 366 81, 366 85, 425202, 425204, 4253823, B29C 4740

Patent

active

050009001

ABSTRACT:
A twin screw extruder with a material homogenizing unit is the subject of this disclosure. Two extruder screws are located within a housing positioned and configured so that screw turns and screw lands of a first screw mesh with respective screw lands and screw turns of a second screw. A homogenizing zone housing is connected to the dual cylinder housing. Two cell rotors are connected to respective extruder screws and are located within the homogenizing zone housing. A plurality of radially distributed cell walls may be disposed on each cell rotor defining a plurality of open conveyor cells where the cell rotors and cell walls of each rotor are configured to mesh a cell wall with an opposing conveyor cell. The cell walls may be arranged with a slope differing from a slope of the extruder screws. The cell walls may be arranged parallel to or at an angle to an axis of said cell rotors.

REFERENCES:
patent: 2785438 (1957-03-01), Willert
patent: 2813302 (1957-11-01), Beck
patent: 3486194 (1969-12-01), Parks
patent: 3501807 (1970-03-01), Selbach
patent: 3690623 (1972-09-01), Boyne
patent: 3719350 (1973-03-01), Loomans
patent: 4447156 (1984-05-01), Csongor

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