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On the Use of the Heating Stage to Control the Thickness Distribution in Thermoformed Parts

  • F. M. Duarte and J. A. Covas
Published/Copyright: May 2, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 19 Issue 2

Abstract

This work investigates the influence of the heating stage of roll-fed and sheet-to-sheet thermoforming on the thickness uniformity of the final parts produced. Modeling of the heat transfer process involved in each case is carried out. An inverse methodology capable of setting the temperature of the heaters that produce a prescribed sheet temperature at the end of the heating stage is presented. The sensitivity of this differential heating technique to moderate perturbations of the individual set values is analyzed.

∗ Mail address: J. A. Covas, Dept. of Polym. Eng., University of Minho, Campus de Azurém, 4800-058, Guimarães, Portugal E-mail:

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Received: 2004-1-29
Accepted: 2004-1-30
Published Online: 2013-05-02
Published in Print: 2004-05-01

© 2004, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. DuPont, IG Farbenindustrie, ICI and Japanese PA Fiber Manufacturers Polyamides 66 and 6
  5. Screw Extrusion
  6. Modeling the Flow in the Metering Zone of Single Screw Extruders Using a Helical Geometry Model
  7. Engineering Analysis of Devolatilization of Various Additives in Intermeshing Co-rotating Twin Screw Extruders
  8. Die Extrusion
  9. Novel Extrusion Dies with Rotating Rollers for CO2-Plastic Foam Production
  10. Experimental Investigation of the Development of Interfacial Instabilities in Two Layer Coextrusion Dies
  11. Detachment of the Polymer Melt from the Roll Surface: Calendering Analysis and Data from a Shear Roll Extruder
  12. Reactive Extrusion
  13. Reactive Extrusion of SAN/EPDM Blends
  14. Film
  15. Easy Tear Film of Biaxially Oriented PA 6/MXD 6 Blend by Double Bubble Tubular Film Process
  16. Deformation Behavior, Processability and Physical Properties for Biaxially Oriented Film of LLDPE
  17. Stretchability and Properties of LLDPE Blends for Biaxially Oriented Film
  18. Stretchability and Properties of Various LLDPE for Biaxially Oriented Film
  19. Molding
  20. Microinjection Molding with LIGA-Like Process
  21. Thermoforming
  22. On the Use of the Heating Stage to Control the Thickness Distribution in Thermoformed Parts
  23. PPS News
  24. PPS News
https://doi.org/10.3139/217.1821

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. DuPont, IG Farbenindustrie, ICI and Japanese PA Fiber Manufacturers Polyamides 66 and 6
  5. Screw Extrusion
  6. Modeling the Flow in the Metering Zone of Single Screw Extruders Using a Helical Geometry Model
  7. Engineering Analysis of Devolatilization of Various Additives in Intermeshing Co-rotating Twin Screw Extruders
  8. Die Extrusion
  9. Novel Extrusion Dies with Rotating Rollers for CO2-Plastic Foam Production
  10. Experimental Investigation of the Development of Interfacial Instabilities in Two Layer Coextrusion Dies
  11. Detachment of the Polymer Melt from the Roll Surface: Calendering Analysis and Data from a Shear Roll Extruder
  12. Reactive Extrusion
  13. Reactive Extrusion of SAN/EPDM Blends
  14. Film
  15. Easy Tear Film of Biaxially Oriented PA 6/MXD 6 Blend by Double Bubble Tubular Film Process
  16. Deformation Behavior, Processability and Physical Properties for Biaxially Oriented Film of LLDPE
  17. Stretchability and Properties of LLDPE Blends for Biaxially Oriented Film
  18. Stretchability and Properties of Various LLDPE for Biaxially Oriented Film
  19. Molding
  20. Microinjection Molding with LIGA-Like Process
  21. Thermoforming
  22. On the Use of the Heating Stage to Control the Thickness Distribution in Thermoformed Parts
  23. PPS News
  24. PPS News
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