Patent ID: 8808610

Claim:
A method of providing a mold cooling system for cooling a polymer product shaped in a mold, the method comprising: casting a passageway into a mold housing having an inner mold surface that defines a cavity, and a plurality of outer members that define a plurality of vacuum chambers disposed in communication with the cavity, wherein the mold surface defines a plurality of corrugations for forming a polymer parison into a corrugated pipe; affixing one or more sealing members to the outer members so as to close off the plurality of vacuum chambers to enable a vacuum to be drawn on polymer extruded into the cavity; providing the mold housing with a connector configured to receive a cooling fluid supply and a cooling fluid return of a moving manifold; and positioning the mold housing in sliding engagement with the moving manifold; wherein the passageway connects the cooling fluid supply and the cooling fluid return when the moving manifold is received in the connector; wherein the passageway includes a plurality of cooling tubes cast into the mold housing between adjacent corrugations.