Injection molding apparatus wherein a torpedo is mounted at the front end of a nozzle to provide a fixed ring gate. The torpedo has an elongated central shaft with a nose portion which projects forwardly into a cylindrical opening extending through the mold to the cavity. The outer surface of the nose portion is sufficiently spaced from the inner surface of the opening to form the ring gate through which the melt flows into the cavity. The nose portion of the central shaft enhances heat transfer during the injection cycle and thus reduces cycle time and provides cleaner gates.

The Ring Plunger Set is a critical component in injection molding, featuring a torpedo mounted at the nozzle’s front end to create a fixed ring gate. This design includes an elongated central shaft with a nose portion projecting into the mold cavity opening, allowing precise melt flow through the ring gate. The space between the nose and the mold opening ensures smooth material passage while enhancing heat transfer during injection. This optimized heat transfer reduces cycle times, improves gate cleanliness, and ensures high-quality molding results, making the Ring Plunger Set an essential element for efficient and reliable injection molding operations.