Double-worm extrusion press

Details Double-worm extrusion press Double-worm extrusion press

1981-11-09

1983-10-11

Jenkins, Robert W.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

366 88, 366 89, 366 91, 366 97, 366290, 366296, B29B 110

Patent

active

044088884

ABSTRACT:
A double-worm press, especially an extrusion or plastifying press for thermoplastic materials and particularly high viscosity thermoplastics, has generally conical worms, at least the discharge zones of which are formed so that the material is treated generally adiabatically therein. For this purpose, the end of the discharge zone has a depth of the worm flight which is between 24 and 33% of the worm diameter, preferably between 26 and 30%, with the ratio of the depth of the flight (or height) to the diameter of the worm increasing progressively away from the discharge end, counter to the direction of feed of the material.

REFERENCES:
patent: 3104420 (1963-09-01), Selbach
patent: 3929322 (1975-12-01), Hanslik
patent: 4047705 (1977-09-01), Hanslik

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