Dtic ada311920 continuous processing of solid propellants in co rotating twin screw extruders by defense technical information center publication date 1995 10 05. Request pdf on researchgate continuous processing of solid propellants in co rotating twin screw extruders the project developed mathematical models of twin screw extrusion processing of solid . Application of twin screw extrusion for continuous processing 513 222 feeding of solid ingredients feeding of solid powder ingredients is based on gravimetric feeding 20 or volumetric feeding 14 the flow characteristics and bulk density of the materials are important criteria for the selection of feeders volumetric feeding is a simple. Comprehensive investigations of the polymer melting process in co rotating twin screw extruders by bastian gabor 9 yielded the following results the melting process is influenced to a high degree by the screw speed and the throughput in other words the degree of filling and the residence time. Twin screw extruders can have a conical or parallel design the two screws can be counter rotating or co rotating intermeshing or non intermeshing also the configurations of the screws themselves can be varied using different conveying and mixing elements counter rotating twin screw extruders are used mainly for processing pvc
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