| 摘要 |
There is provided a method of injection molding a metal part and an injection molding apparatus which reduces or eliminates drooling of metal from a nozzle. The method includes the steps of (A) separating an injection nozzle of an injection chamber from contacting a mold surface, (B) retracting a plunger in the injection chamber to create a suction in the injection chamber, (C) closing an inlet to the injection chamber to seal the injection chamber, (D) maintaining melted metal in the injection chamber with a pressure difference and surface tension without substantial drooling from the injection nozzle, (E) placing the injection nozzle in contact with the mold surface and (F) advancing the plunger in the injection chamber to inject the metal into the mold. |
