Fluid cooling of injection molded plastic articles
AssigneeLogic Devices, Inc.
InventorPaul E. Allen
Life of this patent
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Abstract
A method and system for cooling an injection molded plastic article by forming a portion of a mold cavity of fluid permeable porous material that communicates with a cooling liquid passageway and subjecting the cooling liquid to different pressures to vary the flow of fluid through the porous plug.
Claims4
Apparatus for cooling a plastic article that is formed by injection of plastic material into a mold formed by mold dies comprising means forming a cooling passgeway in the mold dies at least adjacent a portion of the cavity, means forming a fluid permeable porous conduit between the cooling passageway and a portion of the mold cavity, a source of cooling liquid, means for providing less than atmospheric pressure in the passageway adjacent said porous conduit, means for forcing said cooling liquid through the passageway to have the liquid at least adjacent the porous conduit be at a greater than atmospheric pressure, and means for alternatively connecting said means for providing less than atmospheric pressure and said forcing means to said passageway.
Dependencies are inferred from the claim text.