Two-channel extruder with mixer

Plastic article or earthenware shaping or treating: apparatus – With separate and distinct upstream agitating or kneading means – Within pressurizing chamber

Patent

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Details

2412601, 259105, 259191, 425378R, B29F 306

Patent

active

039999211

ABSTRACT:
This invention relates to an improvement in an extruder with two press screws arranged coaxially in one another in an outer jacket and each carrying a screw thread for feeding various plastic materials, for example, granulated soap, to the press nozzle, where the outer screw is driven while the inner screw is stationary, and where the inner screw is in communication with the charging material in the area of the charging hopper through window-type openings in the outer screw. The said improvement involves a mixing element between the end of the press screws and the extrusion nozzle whereby the two strands being extruded are mixed.

REFERENCES:
patent: 2257067 (1941-09-01), Parsons
patent: 2653351 (1953-09-01), Henning
patent: 2764780 (1956-10-01), Reifenhauser
patent: 2769201 (1956-11-01), Lorenian
patent: 3314108 (1967-04-01), Wienand et al.
patent: 3689182 (1972-09-01), Kovacs
patent: 3712594 (1973-01-01), Schippers et al.
patent: 3801248 (1974-04-01), Fisher
patent: 3870451 (1975-03-01), Gokcen

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