Abstract
The temperature change and the heat flow in a die were analytically calculated using a simple one-dimensional model to obtain the basic knowledge about the thermal behavior of a die during casting cycles. According to the characteristic of the heat flow field, three regions were defined in the die : the reverse heat flow region, the variable heat flow region and the constant heat flow region. In the constant heat flow region, temperature and heat flow were steady and calculations thus simple. The reverse heat flow ratio was defined as the ratio of the heat flowing to the cavity side to the total heat absorbed by the die. This concept should prove useful for evaluating the relative importance of cavity side spray. The general relation between the thermal behavior of a die and the casting conditions was studied based on the results of this study.
