Journal of Materials Science

, Volume 26, Issue 2, pp 292–300 | Cite as

Computer modelling of the origin of defects in ceramic injection moulding

Part II Shrinkage voids
  • K. N. Hunt
  • J. R. G. Evans
  • J. Woodthorpe


Using the thermal properties previously acquired for a polystyrene-zirconia suspension, the solidification and shrinkage of injection-moulded rectangular bars was computed by a finite difference numerical method. By considering the final stage of mould packing, upper and lower bounds for the moulding conditions needed to avoid internal shrinkage defects and sink marks were successfully predicted. The resulting computer method allows the influence of a wide range of material and machine parameters to be explored.


Polymer Shrinkage Lower Bound Computer Modelling Thermal Property 
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Copyright information

© Chapman and Hall Ltd 1991

Authors and Affiliations

  • K. N. Hunt
    • 1
  • J. R. G. Evans
    • 1
  • J. Woodthorpe
    • 2
  1. 1.Department of Materials TechnologyBrunel UniversityUxbridgeUK
  2. 2.T & N TechnologyCawstonUK

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