Apparatus for working rubber compounds

Details Apparatus for working rubber compounds Apparatus for working rubber compounds

1979-03-14

1980-10-14

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

With separate and distinct upstream agitating or kneading means

Within pressurizing chamber

264176R, 366 79, 366 87, 425205, 425209, B29F 302

Patent

active

042278708

ABSTRACT:
An extruder for working rubber and other elastomeric compounds having an extruder screw with a feed section, metering section and a transition section. The transition section has a plurality of working sections in succession with each section having a pair of helical flights defining a pair of primary channels. One of such helical flights has a flight that leads off to define a secondary channel for leading off the portion of the compound subjected to a shearing action from the primary channels. The primary channels decrease in volume while their axial width remains the same. The secondary channel increases in axial width and depth to accommodate the worked rubber compound.

REFERENCES:
patent: 3271819 (1966-09-01), Lacher
patent: 3445890 (1969-05-01), Heston et al.
patent: 3650652 (1972-03-01), Dray et al.
patent: 3680844 (1972-08-01), Menges et al.
patent: 3698541 (1972-10-01), Barr
patent: 3867079 (1975-02-01), Kim
patent: 3888469 (1975-06-01), Geyer
patent: 4107260 (1978-08-01), Dougherty

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