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A Unified View of Modeling Flow in Counter-rotating Twin Screw Extruders

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Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 8 Issue 3

Abstract

Intermeshing counter-rotating twin screw extruders have played an important role in polymer processing technology in the post World War II period. They operate on basically the same principle as low viscosity multiple screw pumps, i.e. they involve forward pumping of fluid contained in C-chambers, which are regions between the screw root and barrel between the interlocked intermeshing regions. Tangential counter-rotating twin screw extruders with open screw channels have also been manufactured in the same period. A new more general model of flow of a Newtonian fluid in a counter-rotating twin screw extruder with partially intermeshing screws is presented. The model allows transition from fully intermeshing to tangential screw machine systems. Calculations are made to show the effect of level of intermesh on pumping capability. Modular counter-rotating twin screw machines are analyzed. The problem of starvation is discussed.

* Mail address: Prof. Dr. J. L. White, Institute of Polymer Engineering, University of Akron, Akron, Ohio 44325-0301, U.S.A.
Received: 1992-3-3
Accepted: 1992-5-25
Published Online: 2013-05-27
Published in Print: 1993-09-01

© 1993, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Mixing
  4. Processing-Structure-Properties Relationships in Blends with Thermotropic Liquid Crystalline Polymers
  5. Screw Extrusion
  6. Extrusion of Recycled Polymer Feedstocks
  7. A Unified View of Modeling Flow in Counter-rotating Twin Screw Extruders
  8. Experimental Study on Dewatering and Devolatilizing Operations Using Intermeshed Twin Screw Extruders
  9. Molding
  10. Simulation of Injection Molding and Comparison with Experimental Values
  11. On the Kinetics of Shear Induced Crystallization in Polypropylene
  12. Structures and Properties of Injection Moldings of Glass Fiber-filled Polypropylenes
  13. Detailed Investigations of Structural Layering Phenomena in Injection Molded Thermotropic Liquid Crystalline Polymers
  14. Material Flow During Compression Moldings of Long Fiber Reinforced Thermoplastic Composites
  15. Rapid Communication of Recent Advances
  16. Dimensional Control of Multicomponent Extrusion
https://doi.org/10.3139/217.930210

Articles in the same Issue

  1. Contents
  2. Contents
  3. Mixing
  4. Processing-Structure-Properties Relationships in Blends with Thermotropic Liquid Crystalline Polymers
  5. Screw Extrusion
  6. Extrusion of Recycled Polymer Feedstocks
  7. A Unified View of Modeling Flow in Counter-rotating Twin Screw Extruders
  8. Experimental Study on Dewatering and Devolatilizing Operations Using Intermeshed Twin Screw Extruders
  9. Molding
  10. Simulation of Injection Molding and Comparison with Experimental Values
  11. On the Kinetics of Shear Induced Crystallization in Polypropylene
  12. Structures and Properties of Injection Moldings of Glass Fiber-filled Polypropylenes
  13. Detailed Investigations of Structural Layering Phenomena in Injection Molded Thermotropic Liquid Crystalline Polymers
  14. Material Flow During Compression Moldings of Long Fiber Reinforced Thermoplastic Composites
  15. Rapid Communication of Recent Advances
  16. Dimensional Control of Multicomponent Extrusion
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