Werner & Pfleiderer Gmbh

Krupp Werner & Pfleiderer Gmbh

Rainer Sauter

Gerhard Weihrich

Ulrich Weller

Wolfgang Woerz

Rainer Munz

Reinhard Wuttke

In a screw-type extrusion machine comprising a composite casing which comprises casing sections fitted together in a longitudinal direction, the casing sections being tightly tautened relative to each other by a plurality of tie rods which extend parallel to each other in the longitudinal direction of the casing on the outside thereof, it is provided with a view to avoiding any over-stressing of the tie rods in the hot condition and to avoiding any leakage between the casing sections in the case of low temperatures and non-uniform temperature distribution, that the tie rods are loaded in the longitudinal direction by a pre-stressed spring system.

Screw-type extrusion machine having tie rods loaded by a pre-stressed

Screw-type extruding machine having a screw element defining a groove

In an underwater pelletizing die plate or an extruder for the pelletizing of thermoplastics, the front face of the die plate, which is provided with a wearing protection layer and over which pass the pelletizing knives, being disposed under water, and heat isulation means being provided on the pelletizing die plate, good axial insulation is to be achieved, accompanied by uniform temperature distribution in the radial direction, it being provided to this end that an insulating layer is disposed between the external upper side of the actual pelletizing die plate and the wearing protection layer, the wearing protection layer being positioned, relative to the insulating layer, with radial play and without axial pressure or with little axial pressure, respectively.

Underwater pelletizing die plate

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Remseck, Germany

Rainer Sauter