shows the transient temperature vs. cooling time distributions at four locations across the wall thickness of the cooling part at die temperatures of 190 and 230 °C. It can be seen that the locations near the external surface of the part cool more rapidly, while the locations near the internal surface (within 1.5 mm from the internal surface) cool down at a slower rate. The cooling rate decreases with increase of the cooling time. Comparing the temperature distributions of the cooling part at two die temperatures, shows that the die temperature has more effect on the temperatures near the internal surface. This coincides with the simulation results carried out by Huang et al. [14]. Moreover, the resulting temperature difference under two die temperatures at the same location is larger at the beginning of cooling and then gradually decreases with increase of the cooling time, which is about 10 °C at the end of cooling. That means that the effect of the die temperature on the temperature distribution of the part at the end of cooling is not very significant.