Agitating – Rubber or heavy plastic working – Stirrer is through-pass screw conveyor
Patent
1976-12-22
1978-02-21
Jenkins, Robert W.
Agitating
Rubber or heavy plastic working
Stirrer is through-pass screw conveyor
366 80, 366323, B29B 106
Patent
active
040757129
ABSTRACT:
An apparatus is provided for the mixing and extruding of thermo-plastic and thermo-setting materials in which a rotor member is rotatable within a barrel member. The members are provided with interacting rotor and barrel helical grooves in the mixing stage of the apparatus which includes a rotor to barrel stock transfer zone and a barrel to rotor stock transfer zone. The grooves of the rotor and barrel members, in the rotor to barrel zone, being sized, with the extrusion capacity of the helical groove in the rotor member decreasing and with the helical groove in the barrel member providing the extrusion capacity for the material. With such a construction relative rotational movement between the barrel and rotor members forces material or stock from the groove in the rotor member into the groove of the barrel member at an approximate uniform rate along the length of the rotor to barrel zone. Material or stock not transferred and remaining in the groove of the rotor member is conveyed forwardly as a result of the aforesaid relative rotational movement between the barrel and rotor members.
The apparatus includes material or stock reorienting means in the portion of the barrel member, in the barrel to rotor zone, which interrupts the material flow along the barrel groove in the barrel to rotor zone and is effective to turn the material presented as near to right angles as possible away from the groove and to direct the reoriented material towards the groove provided in the rotor member, where the reoriented material, is mixed with any axially advancing material in the rotor member. The material then flows to the discharge end of the apparatus upon continued relative rotational movement between the barrel and rotor members.
The apparatus may be provided with means for longitudinally displacing one of the barrel or rotor members relative to the other to vary the extrusion or through flow capacity of the members. The material reorienting means and the means providing for longitudinal displacement between the barrel and rotor members may be combined in one apparatus.
REFERENCES:
patent: 2595455 (1952-05-01), Heston
patent: 3102694 (1963-09-01), Frenkel
patent: 3164375 (1965-01-01), Frenkel
patent: 3632255 (1972-01-01), Geyer
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