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Improved Foamed Core Injection Molding Process for Reduced Costs
The process offered here enables the manufacture of plastic parts with smooth skins and foamed cores. The process can be implemented on standard molding machines equipped with gas injection hardware. It can be used with virtually any thermoplastic polymer. Compared to other foaming processes, this process allows more complex parts to be manufactured with better surfaces and lower foam densities. It offers improved "touch" and lower cost than integral skin polyurethane foamed parts. Molded part costs can be reduced without loss of functionality through use of the process.injecting melt thermoplastic polymer foaming agent injection unit mold maintaining holding pressure 200 1000 bar article smooth outer surface released gas introduced (50 bar) create hollow space returning portion (10 70%) closed prevent flowing

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