Mixing process and screw extruders for carrying out the same

Details Mixing process and screw extruders for carrying out the same Mixing process and screw extruders for carrying out the same

1989-02-21

1991-09-03

Stinson, Frankie L.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

366 90, 366321, 366324, B01F 708

Patent

active

050447599

ABSTRACT:
Process for mixing products uses an extruder having one or more screws, rotating in a cylinder, to determine forward movement of the material. A backward flow of material is generated by means of a counterthreading whose lead is opposite to that of the extruder screw. The backward flow on meeting the forward flow gives rise to increasingly thorough mixing while the material moves forward. The forward movement of the mixed material is ensured by providing the counter threading with a helical channel whose lead is the same as that of the extruder screw, or with channels or holes of varying sizes and position.

REFERENCES:
patent: 3427003 (1969-02-01), Schneider et al.
patent: 3764118 (1973-10-01), Matsuoka
patent: 4103354 (1978-07-01), Gorbatuv et al.
patent: 4118163 (1978-10-01), Lee
patent: 4363671 (1982-12-01), Rugg et al.
patent: 4392967 (1983-07-01), Alexander
patent: 4416606 (1983-11-01), Sugano et al.
patent: 4600311 (1986-07-01), Maurrier

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