Numerical Simulation and Experimental Research on Coupling Temperature Field of the Reaction Forming Mould

Abstract

The coupled temperature field for mould heating system(MHS) is studied. According to the heat transfer mechanism of the MHS, it is divided into external controllable temperature field and internal curing reaction temperature field. Considering internal temperature fields of curing reaction as the load for controllable external temperature fields, a load definition method is proposed. Based on this method, the coupling temperature field of the mould heating system is established. Taking bulk molding compound(BMC) curing reaction mould as an example, the temperature experiment is carried out. Error sensitivity analysis method is used to analyze external controllable temperature field and calculate the maximum error position, as a result, the manufacturing accuracy of the MHS is improved, and experimental errors are decreased. To improve the temperature rise rate and make the mould cavity temperature field more quickly reach the thermal equilibrium, the curve of the heating process is decomposed into three periods. Using the multi-channel proportion-integration-differentiation(PID) control technology, the temperature is in strict accordance with curve. The simulation results agree well with the experimental results. The mould cavity temperature field met the industry standard.