Numerical modelling for rotational moulding with non-isothermal heating

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Lim, K.K., Ianakiev, A. ORCID: 0000-0002-1413-8110 and Hull, J.B., 2003. Numerical modelling for rotational moulding with non-isothermal heating. Plastics, Rubber and Composites, 32 (10), pp. 421-430. ISSN 1465-8011

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Official URL: http://dx.doi.org/10.1179/146580103225004342

Abstract

In the rotational moulding process, the internal air temperature has been widely recognised as a tool to predict an optimum cycle time. This paper presents a new numerical approach to predict the internal air temperature in a two-dimensional (2-D) static model without requiring the consideration of the tumbling motion of polymer powder. The initial non-isothermal heating of the static model is actually formed by two changeable plastic beds (stagnant and mixing beds), which represent the actual stagnant and mixing pools inside a rotating mould respectively. In the numerical approach, the lumped-parameter system and coincident node technique are proposed to incorporate with the Galerkin Finite Element Method in order to account for the complex thermal interaction of the internal air. It helps to overcome the difficulty of multidimensional static models in predicting an accurate internal air temperature during the heating stage of rotationally powdery plastic. Importantly, the predicted temperature profiles of the internal air, oven times for different part thicknesses and process conditions accord with the available experimental results.

Item Type:

Journal article

Publication Title:

Plastics, Rubber and Composites

Creators:

Lim, K.K., Ianakiev, A. and Hull, J.B.

Publisher:

Published by Maney on behalf of the Institute of Materials, Minerals and Mining

Place of Publication:

Leeds

Date:

2003