Agitating – Rubber or heavy plastic working – Plural mixing chambers
Patent
1983-12-14
1984-12-11
Jenkins, Robert W.
Agitating
Rubber or heavy plastic working
Plural mixing chambers
264DIG65, 366 97, 366146, 425200, 425DIG39, B29B 300
Patent
active
044875088
ABSTRACT:
An extruder for polymeric materials, comprising a housing forming a mastication stage with one or more feedscrews, includes a preheating and premixing stage with a cylindrical chamber centered on a vertical axis which is eccentrically traversed by a supply passage for the feeding of polymeric material to the mastication stage. The chamber, which is heated from the outside, contains two mixing wheels jointly rotatable about the axis, each wheel having a plurality of raker arms projecting from a hub to the chamber periphery in an off-radial direction and with a tilt causing the arms of the upper wheel to draw incoming fresh material toward the axis and down into the orbit of the arms of the lower wheels which in turn drive the material toward the periphery and, to the extent that an outlet port leading to the mastication stage is obstructed, back into the orbit of the arms of the upper wheel for recirculation.
REFERENCES:
patent: 2478893 (1949-08-01), Brant
patent: 3957255 (1976-05-01), Groom
patent: 4059401 (1977-11-01), Hanslik
patent: 4214862 (1980-07-01), Kolossow
patent: 4385883 (1983-05-01), Hanslik
American Maplan Corporation
Dubno Herbert
Jenkins Robert W.
Ross Karl F.
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