An injection-foaming method for a thermoplastic resin comprising using an injection unit 30 provided with a hopper 35, a plasticizing cylinder 31 and a screw 32, and a mold 10 having a mold cavity 10a of changeable capacity; filling the mold cavity 10a with a foaming-agent-containing melted resin injected...http://www.google.es/patents/US7858002?utm_source=gb-gplus-sharePatente US7858002 - Method for injection expansion molding of thermoplastic resin
Method for injection expansion molding of thermoplastic resin
