This report aims to examine the effects of various fins on the heating/cooling efficiency of the rotational molding process and on molded product qualities. Rotational molding experiments were
carried out in a laboratory-scale uniaxial machine, which is capable of measuring the internal air
temperature in the cycle. Molds with three types of extended fins, pin, rectangular and triangular, were used to manufacture the parts. Cycle time reductions by these fins were determined, and characterization of molded part properties was performed after molding.