Hermann Berstorff Maschinenbau Gmbh

Npo Norplast

Eberhard Uhland

Manfred Dienst

Heinz Brinkmann

Nikolai S Enikolopow

Stanislaw A Wolfson

Lidia A Filmakowa

Anatolie I Nepomnjaschtschie

Wiktor A Teleschow

Eckart Pantzer

Claus-Heinrich Wente

Wadim G Nikolskie

A method and apparatus for pulverizing polymers. The apparatus comprises a hollow barrel within which at least one screw rotates. The interior of the hollow barrel is divided into a plurality of zones. Heating members are associated with a first of these zones and cooling members are associated with at least a second of these zones. Pre-crushing and pulverizing members are also disposed in said second zone. In the method, polymeric material is fed into the first zone of the hollow barrel and is fused therein. The fused material is then conveyed into the second zone wherein it is cooled, pre-crushed and pulverized. The powdered polymeric material is then discharged from said second zone. The method can therefore be effected continuously in a single apparatus.

Method and apparatus for pulverizing polymers

A method and apparatus for regulating a dose-charged twin-screw extrusion device so as to achieve optimum quantitative discharge of a material being extruded in an automatic manner. By monitoring the screw torque and the mass temperature and modifying the dosed supply of material and/or the screw speed in accordance with the monitored values, the optimum mode of operation is ensured for the extrusion device which fully utilizes the discharge capacity of the device without risking damage either to the extrusion device itself or to the material being extruded.

Method and apparatus for achieving optimum discharge from a twin-screw

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Burgdorf, Germany

Eberhard Uhland