Dimensioning and positioning coolant lines is an important aspect of heat removal from a mold during the injection molding process. The specific heat capacity and thermal conductivity of a polymer determines energy removal behavior. Because every polymer material has a specific cooling behavior, the heat removal process varies.
In this lesson we will look at how different circuit designs transfer heat from the polymer and the mold to the temperature control unit.
Topics in this lesson include: the importance of waterline sizing and positioning for removing heat from a mold; why waterline sizing does not necessarily impact heat removal; how different circuit designs and positions affect Reynolds numbers, coolant temperatures, and mold temperature ranges; and the importance of uniform heat removal from a mold.