Agitating – Rubber or heavy plastic working – Stirrer is through-pass screw conveyor
Patent
1996-02-28
1996-11-12
Scherbel, David
Agitating
Rubber or heavy plastic working
Stirrer is through-pass screw conveyor
425204, 366 88, A21C 106, B01F 708, B28C 116
Patent
active
055733328
ABSTRACT:
In a screw element for the conditioning and/or processing of plastics or elastomers in a screw-type extruding machine having screw shafts drivable to rotate in the same direction and at least one pair of meshing screw elements, each screw element having a land of which the enveloping curve extends radially at a constant distance away from the respective shaft and, in the longitudinal direction, is of linear extension in parallel to the longitudinal axis of the shaft, a radially external screw land section near the housing running parallel to the inside wall of the housing with little play relative to the latter, for the purpose of moderate recirculation without stress points accompanied by strong axial and transverse mixing in a defined volume, it is provided that the enveloping curve encloses a blade land of reduced cross-sectional area referred to the enveloping curve, in that starting from the one axial end of the screw element and the first, in the circumferential direction external, end of the section, near the housing, of the enveloping curve, the blade ridge of the land, seen in the circumferential direction of an angle .rho., extends along part of this section, near the housing, of the enveloping curve and in that, in the axial direction, the blade ridge extends towards the second, in the circumferential direction external, end of the section, near the housing, of the enveloping curve.
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Weihrich Gerhard
Wiedmann Werner
Scherbel David
Soohoo Tony G.
Werner & Pfleiderer GmbH
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