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Theoretical Principles Governing the Design of Barrier Sections in Extruders

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Published/Copyright: May 27, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 6 Issue 2

Abstract

Barrier screws used in conjunction with grooved-barrel extruders are gaining increasing importance on account of their high throughput and melting performance as well as their good homogenizing action. Although a number of calculation formulae now exist for the barrier screw, no comprehensive, logical design system for power law melts has been compiled to date. This paper takes a simple melting model and shows how the geometry of the barrier section can be designed (flight depth and screw channel width of the channels for the solid and the molten material and the length of the barrier section). A method of calculating the pressure and temperature profile in the melt channel is also presented. The different variables affecting the melting process are discussed on the basis of parameter studies.

* Mail address: Prof. Dr. H. Potente, Kunststoff-technologie, Universitát-GH Paderborn, Pohlweg 47–49 W-4790 Paderborn, Germany.
Accepted: 1990-4-17
Published Online: 2013-05-27
Published in Print: 1991-05-01

© 1991, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Internal Mixers
  4. Spreader Blade Analogy of Flow Past an Internal Mixer Rotor
  5. Observation and Analysis of Carbon Black Agglomerate Dispersion in Simple Shear Flows
  6. Non-Newtonian and Non-Isothermal Modeling of 3D-Flow in an Internal Mixer
  7. Relationship between Rotor Designs in an Internal Mixer and Physical Properties of Mixed Rubber Compounds
  8. Dynamic Modelling of Internal Mixers Using System Identification Techniques
  9. Single Screw Processing
  10. Theoretical Principles Governing the Design of Barrier Sections in Extruders
  11. A Model of Flow in the Mixing Section of the List KoKneader
  12. Twin Screw Extrusion
  13. Drag and Pressure Flow in Twin Screw Extruders
  14. Feed Variance Limitations for Co-rotating Intermeshing Twin Screw Extruders
  15. Fluid Mechanics of Distributive Mixing in a Modular Intermeshing Corotating Twin Screw Extruder
  16. New Ways in the Manufacturing of Finished and Semi-finished Products from Nylon
  17. Mixing in Non-intermeshing Twin Screw Extruders
https://doi.org/10.3139/217.910126

Articles in the same Issue

  1. Contents
  2. Contents
  3. Internal Mixers
  4. Spreader Blade Analogy of Flow Past an Internal Mixer Rotor
  5. Observation and Analysis of Carbon Black Agglomerate Dispersion in Simple Shear Flows
  6. Non-Newtonian and Non-Isothermal Modeling of 3D-Flow in an Internal Mixer
  7. Relationship between Rotor Designs in an Internal Mixer and Physical Properties of Mixed Rubber Compounds
  8. Dynamic Modelling of Internal Mixers Using System Identification Techniques
  9. Single Screw Processing
  10. Theoretical Principles Governing the Design of Barrier Sections in Extruders
  11. A Model of Flow in the Mixing Section of the List KoKneader
  12. Twin Screw Extrusion
  13. Drag and Pressure Flow in Twin Screw Extruders
  14. Feed Variance Limitations for Co-rotating Intermeshing Twin Screw Extruders
  15. Fluid Mechanics of Distributive Mixing in a Modular Intermeshing Corotating Twin Screw Extruder
  16. New Ways in the Manufacturing of Finished and Semi-finished Products from Nylon
  17. Mixing in Non-intermeshing Twin Screw Extruders
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