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A model of the injection moulding process

Published online by Cambridge University Press:  17 February 2009

J. Whale,
N. Fowkes,
G. Hocking and
D. Hill
N. Fowkes
Affiliation:
Department of Mathematics, University of Western Australia, Nedlands WA 6009, Australia.
G. Hocking
Affiliation:
School of Mathematical and Physical Sciences, Murdoch University, Murdoch WA 6150, Australia.
D. Hill
Affiliation:
Department of Mathematics, University of Western Australia, Nedlands WA 6009, Australia.
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Abstract

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This paper is concerned with the injection moulding process, in which hot molten plastic is injected under high pressure into a thin cold mould. Assuming that the velocity and temperature profiles across the mould maintain their shape, a simple steady state model to describe the behaviour of a Newtonian fluid during the filling stage is developed. Various phenomena of the process are examined, including the formation of a layer of solid plastic along the walls of the mould, and the relationship between the flux of liquid plastic through the mould and the average pressure gradient along the mould. In any given situation, it is shown that there is a range of pressures and injection temperatures which will give satisfactory results.

Information

Type
Research Article
Information
The ANZIAM Journal , Volume 37 , Issue 1 , July 1995, pp. 1 - 15
Copyright
Copyright © Australian Mathematical Society 1995

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