Patent ID: 6267576
Filing Date: 2001-07-31
Classification: B29C

Abstract:
A mold assembly for making a multilayer molded article of a thermoplastic resin comprising:a first mold having a cavity face, a resin-supplying gate open to said cavity-face, and a resin passage communicating with said resin-supplying gate;a second mold having a cavity face opposing the cavity face of said first mold;a shut-off pin slidably received in said resin-supplying gate;a pin-driving unit for moving said shut-off pin among an opening position where said shut-off pin is completely received in said first mold while said resin-supplying gate is maintained in an opening state, a closing position where said shut-off pin is completely received in said first mold while said resin-supplying gate is maintained in a closing state, and a projecting position where a part of said shut-off pin projects from the cavity face of said first mold while said resin-supplying gate is maintained in the closing state;a resin-supplying unit for plurally supplying, in a process cycle, a molten thermoplastic resin from said resin-supplying gate by way of said resin passage;a press unit, connected to said first and second molds, for moving at least one of said molds between an open position where said first and second molds are in an open state and a closed position where said molds are in a closed state; anda control unit electrically connected to said pin-driving unit and said press unit so as to plurally supply in a process cycle a molten thermoplastic resin in control of moving said shut-off pin and said press unit.