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Experimental Study on the Injection Compression Molding of Parts with Precision Contours

  • S. Y. Yang and L. Lien
Published/Copyright: May 28, 2013
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International Polymer Processing
From the journal International Polymer Processing Volume 11 Issue 2

Abstract

The thermomechanical history of the melt under injection compression molding follows a quadrilateral-shaped path, rather than conventional triangular-shaped path, over the P-v-T diagram. The control capacity and flexibility over post-filling is significantly enhanced. It thus can produce parts with better dimensional control with less frozen-in orientation than those from conventional injection molding. This paper is devoted to study its technological application on the precision molding of parts with precision contours. A modified injection molding machine incorporating compression mechanism, and a mold with movable wall and shut-off mechanism, are used. The quality of injection-compression-molded polysytrene convex lenses is defined and compared with those injection molded. With the same cooling time, injection compression can produce lenses with better quality than those without compression

* Mail address: S. Y. Yang, Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan R.O.C.
Received: 1995-7-27
Accepted: 1996-1-5
Published Online: 2013-05-28
Published in Print: 1996-05-01

© 1996, Carl Hanser Verlag, Munich

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Eighteenth in a Series: Toshiba Machine
  5. Screw Extrusion
  6. Theoretical and Experimental Investigations of the Melting of Pellets in Co-Rotating Twin-Screw Extruders
  7. An Improved Flow Simulation Model for a Tangential Counter-Rotating Twin Screw Extruder
  8. Modeling and Experimental Study of the Flow in a Simplified Cavity Transfer Mixer
  9. An Analytical Model of the Conveying Behaviour of Closely Intermeshing Co-rotating Twin Screw Extruders
  10. Reactive Processing
  11. Simulation of Continuous Polymerization in a Modular Intermeshing Co-rotating Twin Screw Extruder
  12. Reactive Blending in a Twin Screw Extruder
  13. Die Extrusion
  14. Viscoelastic Simulations of Stratified Bicomponent Extrusion through Slit Dies
  15. Fibers
  16. Spinnability of Polymer Melts – a Complex Problem in Basic Research1)
  17. Molding
  18. Structure and Properties of Inflation Films of β-Phase Nucleating Agent-Added Polypropylene
  19. Inverse Modeling of Injection Molding Thermal Stresses to Optimize Temperature and Pressure History
  20. An Assessment of Thermal Stresses in Injection Moulded ABS Copolymer
  21. Rapid Communications
  22. Experimental Study on the Injection Compression Molding of Parts with Precision Contours
https://doi.org/10.3139/217.960188

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Eighteenth in a Series: Toshiba Machine
  5. Screw Extrusion
  6. Theoretical and Experimental Investigations of the Melting of Pellets in Co-Rotating Twin-Screw Extruders
  7. An Improved Flow Simulation Model for a Tangential Counter-Rotating Twin Screw Extruder
  8. Modeling and Experimental Study of the Flow in a Simplified Cavity Transfer Mixer
  9. An Analytical Model of the Conveying Behaviour of Closely Intermeshing Co-rotating Twin Screw Extruders
  10. Reactive Processing
  11. Simulation of Continuous Polymerization in a Modular Intermeshing Co-rotating Twin Screw Extruder
  12. Reactive Blending in a Twin Screw Extruder
  13. Die Extrusion
  14. Viscoelastic Simulations of Stratified Bicomponent Extrusion through Slit Dies
  15. Fibers
  16. Spinnability of Polymer Melts – a Complex Problem in Basic Research1)
  17. Molding
  18. Structure and Properties of Inflation Films of β-Phase Nucleating Agent-Added Polypropylene
  19. Inverse Modeling of Injection Molding Thermal Stresses to Optimize Temperature and Pressure History
  20. An Assessment of Thermal Stresses in Injection Moulded ABS Copolymer
  21. Rapid Communications
  22. Experimental Study on the Injection Compression Molding of Parts with Precision Contours
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