Patent
1975-02-28
1976-03-09
Jenkins, Robert W.
B29B 106
Patent
active
039427749
ABSTRACT:
Redistributive mixing is effected in an extruder wherein the extruder screw advances thermoplastic material toward and through transfer grooves in a corotative torpedo. The torpedo grooves progressively diminish in cross sectional flow area from inlet ends at the upstream end of the torpedo toward downstream ends running out adjacent to the torpedo tip. Feeder grooves in a complementary passage wall of a stationary discharge head adapter in which the torpedo operates, receive the thermoplastic material transferred and propelled with redistributive mixing action from the torpedo grooves. The passage wall grooves have upstream entry ends aligned with the upstream ends of the torpedo grooves and extend therefrom in progressively increasing cross sectional flow area to downstream ends feeding toward an outlet.
REFERENCES:
patent: 3045283 (1962-07-01), Keiser
patent: 3131433 (1964-05-01), Volland
patent: 3486192 (1969-12-01), Roy
patent: 3555616 (1971-01-01), Parks
patent: 3865354 (1975-02-01), Burpulis et al.
Beloit Corporation
Jenkins Robert W.
LandOfFree
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