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Pressure/Throughput Behavior of a Single-screw Plasticising Unit in Consideration of Wall Slippage

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Published/Copyright: June 5, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 17 Issue 2

Abstract

The mathematical models so far available for describing the throughput behavior of plasticising extruders were developed with the assumption of a wall-adhering melt. There are, however, a series of plastic melts, and also elastomers, polymer suspensions, ceramic materials and food products that display wall slippage during processing. A mathematical model has been developed for this material behavior, which describes the flow behavior for the unidimensional, Newtonian, isothermal case.

Apart from the development of the analytical model, the flow behavior of wall-slipping polymer melts was also analysed with the aid of finite element calculations (FEM). A comparison of the results for the pressure/throughput behavior shows that the calculation results tally very well for the two methods. It is thus possible to develop a procedure which makes it possible to describe the phenomenon of wall-slippage for the non-Newtonian, multi-dimensional, non-isothermal case.

* Mail address: H. Ridder, Institute for Polymer Processing, University of Paderborn, Warburgerstr. 100-49, D-33098 Paderborn, Germany
Received: 2002-8-22
Accepted: 2001-1-31
Published Online: 2013-06-05
Published in Print: 2002-05-01

© 2002, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Editorial
  2. Thirteenth of a Series: The First and Best Industrial Polymer Rheologist — Melvin Mooney (1893–1968)
  3. Single Extrusion
  4. A New Method for Simulating the Conveying of Solid Pellets
  5. A 3D Numerical Study of Fluid Flow and Heat Transfer in a Single Screw Extruder
  6. Pressure/Throughput Behavior of a Single-screw Plasticising Unit in Consideration of Wall Slippage
  7. Computational Study of the Velocity Field in the Conveying Element of a Ko-kneader with CFD Method
  8. Reactive Extrusion
  9. Modification of Polyolefin with Maleic Anhydride/Styrene and Methyl Methacrylate/Styrene
  10. Fibers and Films
  11. Direct Measurement of Fiber Temperature in the Continuous Drawing Process of PET Fiber Heated by CO2 Laser Radiation
  12. Injection Molding
  13. Evaluation of a Model Describing the Advancing Flow Front in Injection Moulding
  14. Process Design for Reducing the Warpage in Thin-walled Injection Molding
  15. Composites
  16. Preferable Filament Diameter Ratios of Hybrid Yarn Components for Optimized Longfiber Reinforced Thermoplastics
  17. Squeeze Flow Rheology of Glass Mat Thermoplastic (GMT) in Large Tools and at High Closing Velocities
  18. Analysis of Heat Flu from Molten Polymers to Molds in Injection Molding Processes
https://doi.org/10.3139/217.1679

Articles in the same Issue

  1. Editorial
  2. Thirteenth of a Series: The First and Best Industrial Polymer Rheologist — Melvin Mooney (1893–1968)
  3. Single Extrusion
  4. A New Method for Simulating the Conveying of Solid Pellets
  5. A 3D Numerical Study of Fluid Flow and Heat Transfer in a Single Screw Extruder
  6. Pressure/Throughput Behavior of a Single-screw Plasticising Unit in Consideration of Wall Slippage
  7. Computational Study of the Velocity Field in the Conveying Element of a Ko-kneader with CFD Method
  8. Reactive Extrusion
  9. Modification of Polyolefin with Maleic Anhydride/Styrene and Methyl Methacrylate/Styrene
  10. Fibers and Films
  11. Direct Measurement of Fiber Temperature in the Continuous Drawing Process of PET Fiber Heated by CO2 Laser Radiation
  12. Injection Molding
  13. Evaluation of a Model Describing the Advancing Flow Front in Injection Moulding
  14. Process Design for Reducing the Warpage in Thin-walled Injection Molding
  15. Composites
  16. Preferable Filament Diameter Ratios of Hybrid Yarn Components for Optimized Longfiber Reinforced Thermoplastics
  17. Squeeze Flow Rheology of Glass Mat Thermoplastic (GMT) in Large Tools and at High Closing Velocities
  18. Analysis of Heat Flu from Molten Polymers to Molds in Injection Molding Processes
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