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Flow Balancing in Extrusion Dies for Thermoplastic Profiles

Part III: Experimental Assessment
  • J. M. Nóbrega , O. S. Carneiro , F. T. Pinho and P. J. Oliveira
Published/Copyright: May 2, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 19 Issue 3

Abstract

A computer code, previously developed by the authors for the automatic die design, is used to optimise the flow distribution in a profile extrusion die using two alternative strategies: one based on length optimisation and the other on thickness optimisation. The numerical predictions are then compared with experimental data gathered during extrusion experiments. The numerical predictions and the experimental results agree within the experimental uncertainty thus showing the effectiveness of the computer code, the optimisation algorithm and the design strategies implemented. Generally speaking, measured and predicted values of pressure drop and flow rate are in good agreement (within 8 % and 6 %, respectively). It also is confirmed that optimisation based on thickness control leads to final profiles that are more prone to distortion.

∗ Mail address: O. Carneiro, Department of Polymer Engineering, Universidade do Minho, 4800-058 Guimarães, Portugal E-mail:

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Received: 2004-3-11
Accepted: 2004-3-18
Published Online: 2013-05-02
Published in Print: 2004-09-01

© 2004, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Polymer Processing Society Annual Meeting 21
  5. Screw Extrusion
  6. Parametric Study of the Mixing Efficiency in a Kneading Block Section of a Twin-screw Extruder
  7. Experiments on Characteristic Deformation and Breakup Behaviors of an Immiscible Drop in a Screw Channel Flow
  8. Die Extrusion
  9. Flow Balancing in Extrusion Dies for Thermoplastic Profiles
  10. Fiber
  11. Effects of Sparse Long Chain Branching on the Spinning Stability of LLDPEs
  12. Dry Spinning of Polymer Fibers in Ternary Systems
  13. Dry Spinning of Polymer Fibers in Ternary Systems
  14. Studies on Methacrylate-hydroethyl Methacrylate Oil-absorptive Fiber
  15. Film
  16. Numerical and Physical Modeling of Polymer Crystallization
  17. Numerical and Physical Modeling of Polymer Crystallization
  18. Modeling
  19. Study on Viscoelastic Behavior and Extrusion Blow Molding Processability of PP/PE Blends
  20. Simulation of Thermal Phenomena on the Interface Molten Polymer/Powder Polymer During Rotational Molding
  21. Effect of Mold Temperature on Structure and Property Variations of PBT Injection Moldings in the Thickness Direction
  22. Tensile and Flexural Properties of β-Nucleated Polypropylenes
  23. Predicting the Long-term Creep Behavior of Plastics Using the Short-term Creep Test
  24. PPS News
  25. PPS News
https://doi.org/10.3139/217.1825

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Polymer Processing Society Annual Meeting 21
  5. Screw Extrusion
  6. Parametric Study of the Mixing Efficiency in a Kneading Block Section of a Twin-screw Extruder
  7. Experiments on Characteristic Deformation and Breakup Behaviors of an Immiscible Drop in a Screw Channel Flow
  8. Die Extrusion
  9. Flow Balancing in Extrusion Dies for Thermoplastic Profiles
  10. Fiber
  11. Effects of Sparse Long Chain Branching on the Spinning Stability of LLDPEs
  12. Dry Spinning of Polymer Fibers in Ternary Systems
  13. Dry Spinning of Polymer Fibers in Ternary Systems
  14. Studies on Methacrylate-hydroethyl Methacrylate Oil-absorptive Fiber
  15. Film
  16. Numerical and Physical Modeling of Polymer Crystallization
  17. Numerical and Physical Modeling of Polymer Crystallization
  18. Modeling
  19. Study on Viscoelastic Behavior and Extrusion Blow Molding Processability of PP/PE Blends
  20. Simulation of Thermal Phenomena on the Interface Molten Polymer/Powder Polymer During Rotational Molding
  21. Effect of Mold Temperature on Structure and Property Variations of PBT Injection Moldings in the Thickness Direction
  22. Tensile and Flexural Properties of β-Nucleated Polypropylenes
  23. Predicting the Long-term Creep Behavior of Plastics Using the Short-term Creep Test
  24. PPS News
  25. PPS News
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