Patent ID: 6516866
Filing Date: 2003-02-11
Classification: B22C,B22D,B29C

Abstract:
A method of producing a hollow plastic product comprising the steps of:providing molten metal; providing molten plastic; providing an injection molding machine with first and second platens; locating a core mold between the first and second platens; locating a product mold between the first and second platens; loading a previously formed core into the product mold; closing the core mold and the product mold by bringing together the first and second platens; clamping the core mold and product mold between the first and second platens with a common clamping force; injecting molten metal into the core mold to form a new core; injecting molten plastic into the product mold and around the previously formed core to form an overmolded assembly comprising a hollow plastic product that covers the previously formed core; removing the common clamping force; opening the core mold and the product mold by separating the first and second platens; removing the new core from the core mold; removing the overmolded assembly from the product mold; and loading the new core into the product mold.