Agitating – Rubber or heavy plastic working – With specified feed means
Patent
1988-05-31
1990-07-03
Jenkins, Robert W.
Agitating
Rubber or heavy plastic working
With specified feed means
366 97, 366149, 366153, 425145, 425147, 425149, 425202, 425207, 425209, 425308, 425311, B28C 704, B28C 714
Patent
active
049386050
ABSTRACT:
An apparatus for the mixing and continuous extrusion of a plastic mass having a first stage in which an intermittently operating mixer receives the starting materials batchwise and a second stage having a screw extruder which is supplied at periodic intervals, with material from the intermittent mixer. In order to provide a simple, inexpensive apparatus for two-stage mixing and extruding in which the full output of the first stage can be used and, independently of the state of the intermediate product, a continuous feed of material into the screw extruder of the second stage is effected. The second stage has mixing and kneading blades continuously rotating within a trough and an extrusion screw which extends along the bottom of the trough into an extrusion cylinder. A continuous drive motor for the extrusion screw is controlled so that the trough is always filled at least to 25% of its volume.
REFERENCES:
patent: 3704972 (1972-12-01), Kneller
patent: 3726648 (1973-04-01), Weber
patent: 3924840 (1975-12-01), Nelson
patent: 4632564 (1986-12-01), Kopernicky
patent: 4765745 (1988-08-01), Strecker
Jenkins Robert W.
Werner & Pfleiderer GmbH
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