NOZZLE GATE OPENING AND CLOSING TIMING ADJUSTING MECHANISM IN MULTIPOINT GATE INJECTION MOLDING MACHINE AND MULTIPOINT GATE INJECTION MOLDING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a nozzle gate opening and closing timing adjusting mechanism and a multipoint gate injection molding method in a multipoint gate injection molding machine capable of changing the amount of filling of a resin injected from each of the nozzle gates without changing the flow rate of a molten resin fed to each of nozzles.;SOLUTION: In the each nozzle gate opening and closing timing adjusting mechanism of the multipoint gate injection molding machine with a constitution that a plurality of the nozzles for injecting the resin are provided, and a gate pin arranged in each of the nozzles opens and closes each of the nozzle gate in accordance with the resin pressure when the resin is filled, on a part or the whole of sites of an injection molding mold on the side opposing to each of the nozzle gates, nozzle gate opening and closing constitutional timing pins operating forward and backward toward the nozzle gate side are provided, and by opening and closing the nozzle gates directly or indirectly through the gate pins by the timing pins, opening and closing timings of a plurality of the nozzle gates are adjusted.;COPYRIGHT: (C)2009,JPO&INPIT