REFRIGERANT COOLED PLASTIC MOLDING

摘要

A method and apparatus are disclosed for cooling a mold of the type having one or more cooling fluid passageways formed therein in a plastic molding machine. Liquid phase refrigerant is supplied to a molding machine and feed flows through the cooling passageways. The feed flow is adjusted to obtain a boiling liquid phase and vapor phase refrigerant mixture throughout each of the cooling fluid passageways. The boiling action acts to greatly increase the heat transfer coefficient and substantially reduces the required cooling cycle.