Startseite Effect of Plug Temperature on the Strain and Thickness Distribution of Components Made by Plug Assist Thermoforming
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Effect of Plug Temperature on the Strain and Thickness Distribution of Components Made by Plug Assist Thermoforming

  • D. Marathe , D. Rokade , L. Busher Azad , K. Jadhav , S. Mahajan , Z. Ahmad , S. Gupta , S. Kulkarni , V. Juvekar und A. Lele
Veröffentlicht/Copyright: 10. Mai 2016
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International Polymer Processing
Aus der Zeitschrift International Polymer Processing Band 31 Heft 2

Abstract

Plug temperature is a key parameter affecting the thickness distribution of thermoplastic components made by plug assist thermoforming. For a specified pair of plug and plastic sheet, the variation in plug temperature can alter the coefficient of friction (COF) between the pair. We show here how the temperature dependence of COF influences the nature and extent of biaxial stretching of the sheet and consequently the thickness distribution of the thermoformed component. In the present study, high impact polystyrene (HIPS) sheets were thermoformed into axisymmetric cups using a plug-assist process in which the aluminum plug temperature (Tplug) was varied from ambient to above the glass transition temperature of HIPS (∼100 °C). Biaxial strain maps on the surfaces of the formed cups were measured and quantified using Grid Strain Analysis (GSA). Thickness distributions of the cups were also measured. Temperature dependent COF between HIPS and aluminum was determined independently using a rotational rheometer. The measured COF was low for T < 100 °C, whereas it increased appreciably at and above 100 °C. We conclude that when Tplug < 100 °C the HIPS sheet slips on the plug during forming, and this results in biaxial stretching of the base and walls of the formed cup. In contrast for Tplug > 100 °C, a significant reduction in the magnitude of slip is expected. Here the sheet is gripped at the clamp and by the plug during forming which causes reduced biaxial stretching of the base and increased uniaxial stretching of the walls of the cup. Simulations of plug-assist thermoforming using a temperature dependent COF showed qualitative agreement with the GSA data thereby supporting our inferences.

*Correspondence address, Mail address: Ashish Lele, Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune 411 008, India, E-mail:

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Received: 2014-12-28
Accepted: 2015-10-23
Published Online: 2016-05-10
Published in Print: 2016-05-29

© 2016, Carl Hanser Verlag, Munich

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Research and Application of Wireless Temperature Measurement Device in High Temperature Enclosed Environment
  5. Influence on Product Quality by pvT-Optimised Processing in Injection Compression Molding
  6. Effect of Plug Temperature on the Strain and Thickness Distribution of Components Made by Plug Assist Thermoforming
  7. Influence of Processing Parameters and Composition on the Effective Compatibilization of Polypropylene–Poly(ethylene terephthalate) Blends
  8. Impact Modification of Isotactic Polypropylene with Ethylene-Propylene Diene Monomer Rubber
  9. Impact Behavior of Continuous Biaxial Reinforced Composites Based on Bio-Polyamides and Man-Made Cellulose Fibres
  10. Preparation and Anti-Fouling Property of Acryloylmorpholine-Grafted PVDF Membrane: The Effect of Cross-Linking Agent
  11. Fine Filament Formation Behavior of Polymethylpentene and Polypropylene near Spinneret in Melt Blowing Process
  12. Fracture Toughness of PP/EPDM/Nano-Ternary Composites: The Role of Distribution of Inorganic Particles
  13. CO2 Laser Ablation of Microchannel on PMMA Substrate for Effective Fabrication of Microfluidic Chips
  14. A Novel Micro Wall Slip Model Based on Chain Length and Temperature
  15. Electrical and Mechanical Properties of Antistatic Poly(vinyl chloride) Composites Filled with Silver Plated Hollow Glass Microspheres
  16. Prototype System to Study the Effect of Weld Lines on the Performance of Extruded Profiles
  17. Extrudate Swell of High Density Polyethylenes in Slit (Flat) Dies
  18. PPS News
  19. PPS News
  20. Seikei Kakou Abstracts
  21. Seikei-Kakou Abstracts
https://doi.org/10.3139/217.3060

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Regular Contributed Articles
  4. Research and Application of Wireless Temperature Measurement Device in High Temperature Enclosed Environment
  5. Influence on Product Quality by pvT-Optimised Processing in Injection Compression Molding
  6. Effect of Plug Temperature on the Strain and Thickness Distribution of Components Made by Plug Assist Thermoforming
  7. Influence of Processing Parameters and Composition on the Effective Compatibilization of Polypropylene–Poly(ethylene terephthalate) Blends
  8. Impact Modification of Isotactic Polypropylene with Ethylene-Propylene Diene Monomer Rubber
  9. Impact Behavior of Continuous Biaxial Reinforced Composites Based on Bio-Polyamides and Man-Made Cellulose Fibres
  10. Preparation and Anti-Fouling Property of Acryloylmorpholine-Grafted PVDF Membrane: The Effect of Cross-Linking Agent
  11. Fine Filament Formation Behavior of Polymethylpentene and Polypropylene near Spinneret in Melt Blowing Process
  12. Fracture Toughness of PP/EPDM/Nano-Ternary Composites: The Role of Distribution of Inorganic Particles
  13. CO2 Laser Ablation of Microchannel on PMMA Substrate for Effective Fabrication of Microfluidic Chips
  14. A Novel Micro Wall Slip Model Based on Chain Length and Temperature
  15. Electrical and Mechanical Properties of Antistatic Poly(vinyl chloride) Composites Filled with Silver Plated Hollow Glass Microspheres
  16. Prototype System to Study the Effect of Weld Lines on the Performance of Extruded Profiles
  17. Extrudate Swell of High Density Polyethylenes in Slit (Flat) Dies
  18. PPS News
  19. PPS News
  20. Seikei Kakou Abstracts
  21. Seikei-Kakou Abstracts
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