VALVE NOZZLE FOR INJECTION MOLDING

摘要

A channel (11) is closed by contact of ring (12) with the pointed end of sprue (13) through spring (16). When molten resin is introduced into resin supply inlet (9), spring (16) is compressed by the pressure of molten resin so that the sprue is advanced. Thus, a gap is formed between the ring and a groove (14) of sprue so that rear channel (116) is connected to front channel (11a). Therefore, the molten resin is injected into the mould from injection port (10) of a nozzle head (8).