Non-isothermal process simulation for compression moulding with glass fiber reinforced thermoplastic materials
- Institut fuer Kunststoffverarbeitung, Aachen (Germany)
One of the main important processes for the large scale production of fiber reinforced parts is the compression moulding process. In the last years the production of parts for the automotive industry showed a big growth especially for the reinforced thermoplastic materials. For a further growth of this material it will be necessary, according to the requirements of the automotive industry, to predict the influence of the process on the part properties and account it during part design. Therefore it is necessary to simulate the production process for these materials. This paper presents a coupled flow-temperature calculation model for the compression moulding process for thermoplastic materials, which takes the temperature and shear-rate dependency of the viscosity, the freeze-in of the material, the heat conductivity, the heat convectivity and the dissipation into account. The model is able to predict the flow fronts and temperature distribution for complex parts. With the aid of the simulation it is possible to detect difficulties, such as flow lines or entrapped air, and also mould filling problems, such as those caused by premature solidification of the melt. The temperature calculation is also important to check if it is possible to fill the mould and how long the cycle time will be. The process simulation leads to a better part and process design. Another advantage is, that the results of the simulation may be an important input for quality management and for the cost calculation. The basic principles of the non-isothermal, non-Newtonian mould filling simulation for the compression moulding process are summed up in the chapters that follow.
- OSTI ID:
- 143639
- Report Number(s):
- CONF-930246--; ISBN 0-87339-251-5
- Country of Publication:
- United States
- Language:
- English
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