The Behavior of Bulk Solids in the Solids Conveying Zone of Smooth Barrel Single Screw Extruders: Friction, Bulk Density and Pressure Anisotropy

Christian Kneidinger, Gernot Zitzenbacher, Manuel Längauer, Stefan Schuschnigg, Jürgen Miethlinger

Research output: Chapter in Book/Report/Conference proceedingsConference contribution

Abstract

This work deals with the material parameters of bulk solids in the solid conveying zone. New measurements show that the coefficient of friction of polypropylene-Homopolymer (PP-H) bulk material is clearly dependent on the frictional distance. Furthermore, a new mathematical model for the bulk density regarding the pressure and the temperature is presented. This model considers the melting point and the pvT-data and needs only three parameters to approximate the bulk density depending on pressure and temperature. The model fits experimental data from room temperature up to the melting point. There is a smooth crossover to the pvT-data at the melting point. These are clear advantages compared to existing models. The same approach approximates the pressure anisotropy sufficiently as well.
Translated title of the contributionThe Behavior of Bulk Solids in the Solids Conveying Zone of Smooth Barrel Single Screw Extruders: Friction, Bulk Density and Pressure Anisotropy
Original languageGerman
Title of host publicationPolymer Processing Society (PPS2017) Dresden
Publication statusPublished - 2017
EventPPS 2017, Europa Africa Conference, Dresden - Dresden, Germany
Duration: 26 Jun 201729 Jun 2017
http://www.pps2017dresden.de/home/

Conference

ConferencePPS 2017, Europa Africa Conference, Dresden
Country/TerritoryGermany
CityDresden
Period26.06.201729.06.2017
Internet address

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