Resin flow controlling device for injection molding machine

摘要

A resin flow controlling device for an injection molding machine which is simple in structure and effective in operation without a large pressure loss, retention and leakage of molten resin, and comprises an orifice formed near the outlet of a molten resin passage; a gap formed between said outlet and said orifice; and a valve plate positioned in said gap; in which said valve plate being made of a spring plate and comprising a bent or folded portion and openings for resin passage, and said closing portion contacting said orifice and being deformed by the pressure of the molten resin to open said orifice.