Component of a molding system for cooling a molded article

A component of a molding system, comprising:

• a heat dissipater that is configured to impart a profiled heat removal rate on a selected portion of a molded article that generally matches a heat distribution therein;
• the heat dissipater defines a heat pickup surface;
• the heat dissipater includes a heat removal structure for removal of heat therefrom;
• the heat dissipater includes a first body having a first thermal conductivity that includes at least one void embedded therein with which to vary a heat removal rate imparted, in use, on the selected portion of the molded article in accordance with the heat distribution therein;
• the component is a mold component including at least one of a split insert, a core insert, or an interface component of a mold stack;
• the molded article is a preform for blow molding into a container and the selected portion thereof is a neck portion that includes a cylindrical wall having a thread protruding therefrom;
• the heat dissipater is configured to cool the thread at a first rate and the cylindrical wall at a second rate;
• wherein the thread is interrupted by at least one slot and the heat dissipater is configured to cool the at least one slot at a third rate.