Method using modular slush molding machine

A method for molding an article of heat-fusing material in a mold having first and second groups of fluid passages disposed adjacent the mold surface for controlling the temperature over respective first and second areas of the mold surface, said method comprising the steps of:

• supplying all of the passages with liquid for maintaining the temperature of the first and second areas of the mold surface at a non-gelling temperature below that required to gel any appreciable thickness of the heat-fusing material, disposing liquid heat-fusing material over the first and second areas of the mold surface, supplying the first group of passages with liquid at a temperature sufficient to raise the temperature of the first area to a higher temperature than the second area for gelling a predetermined thickness of the heat-fusing material over the first area while maintaining said second area at a lower temperature, removing non-gelled liquid heat-fusing material from the mold, and supplying the first and second passages with liquid at a temperature sufficient to raise the temperature of the first and second areas to a cure temperature for curing the heat-fusing material disposed thereover.