Agitating – Rubber or heavy plastic working – Stirrer is through-pass screw conveyor
Patent
1977-12-02
1979-05-01
Jenkins, Robert W.
Agitating
Rubber or heavy plastic working
Stirrer is through-pass screw conveyor
B29B 106
Patent
active
041520777
ABSTRACT:
An extruder machine for processing thermoplastic materials such as low density polyethylene, the extruder incorporating a body having a bore therethrough with a rotor journalled therein and having several mixing and cooling sections set thereon in succession. The mixing sections on the rotor are multiple flighted defining primary and secondary channels having their discharge and entrances respectively blocked or restricted by annular dam arrangements. The bore includes a plurality of annular grooves of symmetrical or non-symmetrical cross-sectional configurations along the axis of the bore which grooves are slightly displaced in the bore with respect to the annular restrictions disposed on the rotor. The rotor, however, is axially displaceable to permit variations in the mixing intensity upon the extrudite being worked, by allowing the annular restrictions on the rotor to be controllably juxtaposed with the annular grooves in the bore of the extruder machine.
REFERENCES:
patent: 3411179 (1968-11-01), Gregory
patent: 3687423 (1972-08-01), Koch
patent: 3814779 (1974-06-01), Wiley
patent: 3850414 (1974-11-01), Scharer
patent: 3867079 (1975-02-01), Kim
Hold Peter
Scharer Hans R.
Tadmor Zehev
Halgren Donald N.
Jenkins Robert W.
Megley Richard B.
USM Corporation
White Vincent A.
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