Transient Heat Transfer in Mold

The temperature field in the mold is governed by the three-dimensional transient heat conduction equation with constant properties. The equation is 

Zheng et al.. Injection Molding, DOI 10.1007/978-3-642-21263-5 7, Springer-Verlag Berlin Heidelberg 2011 

The mold temperature is initially set to the coolant temperature, and subsequently the mold temperature field at the end of the previous cycle is used as the initial condition for the new cooling cycle. 

The mold boundary T is comprised of the cavity surface the cooling channel surface F, and the external surface F. The boundary conditions are as follows  

q is the heat flux across the melt and mold interface, which is not known beforehand. The mold cooling analysis is essentially coupled with the transient heat transfer in the polymer melt during filling, packing, and cooling stages. 

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