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Rheological Fundamentals of Polymer Processing pp 289–320Cite as

Injection Moulding of Thermoplastic Polymers

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Part of the book series: NATO ASI Series ((NSSE,volume 302))

Abstract

The injection moulding of thermoplastic materials can be divided into the following steps :

  • plastication in a screw-barrel system

  • filling of the cav ity : us u ally, the flow rate is imposed, w ith a constant value, or with successive steps with different flow rates. Sometimes a limit of the pressure is specifiied by the operator, so that the end of filling is at constant pressure

  • packing-holding : the pressure at the entrance of the cavity is now imposed, and an extra flow of material compensates the thermal shrinkage

  • cooling in the mould : this step begins when the gate is frozen, although, of course, the polymer is cooled as soon as it enters the cavity which is kept usually around the room temperature.

  • ejection

  • cooling outside the mould

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Author information

Authors and Affiliations

  1. Centre de Mise en Forme des Matériaux, URA CNRS 1374, Ecole des Mines de Paris, BP 207, 06904, Sophia-Antipolis Cedex, France

    M. Vincent

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  1. M. Vincent
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Editor information

Editors and Affiliations

  1. Department of Polymer Engineering, Universdade do Minho, Braga, Portugal

    J. A. Covas

  2. Centre de Mise en Forme des Matériaux, Ecole des Mines de paris, Sophia-Antipolis, France

    J. F. Agassant

  3. Department of Materials Engineering, Instituto Superior Técnico, Lisbon, Portugal

    A. C. Diogo

  4. Department of Chemical Engineering, McMaster University, Hamilton, Canada

    J. Vlachopoulos

  5. Department of Mathematics, University of Wales, Aberystwyth, UK

    K. Walters

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© 1995 Springer Science+Business Media Dordrecht

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Vincent, M. (1995). Injection Moulding of Thermoplastic Polymers. In: Covas, J.A., Agassant, J.F., Diogo, A.C., Vlachopoulos, J., Walters, K. (eds) Rheological Fundamentals of Polymer Processing. NATO ASI Series, vol 302. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8571-2_14

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  • DOI: https://doi.org/10.1007/978-94-015-8571-2_14

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-481-4637-6

  • Online ISBN: 978-94-015-8571-2

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