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Flow Balancing in Extrusion Dies for Thermoplastic Profiles

Part I: Automatic Design
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Published/Copyright: June 3, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 18 Issue 3

Abstract

To achieve a specified geometry for an extruded profile, together with a minimal degree of internal stresses, flow balancing of the die is required. To attain this objective, the flow along a profile die channel must be accurately described, and this demands a computational code able to predict complex 3D non-isothermal flow patterns. In this work new methodologies for flow balancing are implemented and illustrated. The design code developed to carry out the automatic search of a final geometry consists of an optimisation routine coupled with geometry and mesh generators and a 3D computational code based on the finite volume method. The issues discussed and described here encompass recent developments, namely the implementation of two alternative optimisation algorithms for the automatic search of a final solution, the enhancement of the strategies previously developed to balance the flow, some improvements in the routine used to generate the mesh and the adoption of a progressive mesh refinement technique. The examples show that the proposed methodology performs well and the solution is attained in just a few minutes of calculation without any user intervention during the calculation process.

* Mail address: O. Carneiro, Institute for Polymers and Composites, Department of Polymer Engineering, Universidade do Minho, 4800-058 Guimarães, Portugal
Received: 2002-7-26
Accepted: 2003-3-4
Published Online: 2013-06-03
Published in Print: 2003-09-01

© 2003, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. First in a Series: Polymer Processing in Developing Countries Polymer Processing in Peru
  5. Screw Extrusion
  6. Modeling and Analysis of Helicoidal Flow in a Conical Extruder
  7. A Powerful Universal Plasticating System for Single-screw-extruders and Injection-moulding Machines
  8. Cross Channel Flow Velocity and Motion Trajectory of Polymers in a Helical Channel
  9. Mixing and Compounding
  10. Influence of Low Molecular Weight Additives on Die Extrusion Rheometer Flow of Thermoplastic Melts
  11. Design of a Static Temperature Scanning Ultrasonic Measurement System and Application to Multi-phase Polymer Systems
  12. Raman Spectroscopy as an On-line Technique to Monitor Shear Flow Effect on Partially Miscible Polymer Blends
  13. Reactive Extrusion
  14. Flow Effects on Polymer Transesterification
  15. A Dynamic Model Accounting for Oscillating Behavior in Reactive Extrusion
  16. Study on Functionalization of Isotactic PP with Maleic Anhydride in an Internal Mixer and a Twin-screw Extruder
  17. Quality Aspects on the Power Cable Core Insulation Extrusion and Thermal Curing Process
  18. Die Extrusion
  19. Flow Balancing in Extrusion Dies for Thermoplastic Profiles
  20. Flow Balancing in Extrusion Dies for Thermoplastic Profiles
  21. Molding
  22. On the Residual Stress and Shrinkage in Injection Compression Molding
https://doi.org/10.3139/217.1745

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. First in a Series: Polymer Processing in Developing Countries Polymer Processing in Peru
  5. Screw Extrusion
  6. Modeling and Analysis of Helicoidal Flow in a Conical Extruder
  7. A Powerful Universal Plasticating System for Single-screw-extruders and Injection-moulding Machines
  8. Cross Channel Flow Velocity and Motion Trajectory of Polymers in a Helical Channel
  9. Mixing and Compounding
  10. Influence of Low Molecular Weight Additives on Die Extrusion Rheometer Flow of Thermoplastic Melts
  11. Design of a Static Temperature Scanning Ultrasonic Measurement System and Application to Multi-phase Polymer Systems
  12. Raman Spectroscopy as an On-line Technique to Monitor Shear Flow Effect on Partially Miscible Polymer Blends
  13. Reactive Extrusion
  14. Flow Effects on Polymer Transesterification
  15. A Dynamic Model Accounting for Oscillating Behavior in Reactive Extrusion
  16. Study on Functionalization of Isotactic PP with Maleic Anhydride in an Internal Mixer and a Twin-screw Extruder
  17. Quality Aspects on the Power Cable Core Insulation Extrusion and Thermal Curing Process
  18. Die Extrusion
  19. Flow Balancing in Extrusion Dies for Thermoplastic Profiles
  20. Flow Balancing in Extrusion Dies for Thermoplastic Profiles
  21. Molding
  22. On the Residual Stress and Shrinkage in Injection Compression Molding
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