Sprueless hydrostatic injection molding

摘要

A hydrostatic injection molding apparatus and process are provided for thermoplastic materials, especially thermoplastic elastomers. The apparatus includes a hot pot plate with a transfer chamber for receiving a thermoplastic material. The hot pot plate is heated to maintain the thermoplastic material in the transfer chamber in a molten state. A cavity plate is positioned adjacent the transfer pot plate, the cavity plate is formed with a plurality of cavities extending therein. Gates are formed in the hot pot plate and the cavity plate. The gates in the respective plates register with one another to provide communication between the transfer chamber and the cavities. The cavity plate is cooled to enable a rapid curing of the thermoplastic material therein.