Patent ID: 6312628
Filing Date: 2001-11-06
Classification: B29C

Abstract:
A method for controlling the temperature of a fluid cooled high temperature injection mold having fluid channels formed therein, comprising the steps of:(a) injecting a molten material into the mold to thereby raise the temperature of the mold at the fluid channels to above the boiling point of water at normal atmospheric pressure;(b) passing a flow of cooling water from a cooling water supply tank through the fluid channels in the high temperature injection mold for a limited duration during a molding cycle and at an elevated pressure level such that the cooling water remains in a liquid state while passing through the fluid channels to thereby reduce the temperature of the injection mold;(c) mixing used high temperature cooling water emerging from the fluid channels of the high temperature injection mold with cooling water from the cooling water supply tank; and(d) returning the mixed cooling water to the cooling water supply tank.