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The gating system of an injection mold serves as the critical channel connecting the injection machine nozzle to the mold cavity. Its design directly impacts the flow behavior of molten plastic, filling efficiency, and the final product quality. The gating system typically consists of four core components: the ​sprue, ​runner, ​gate, and ​cold slug well, which work together to transport, distribute, and control the molten plastic during molding.

In Electrical Discharge Machining (EDM) for molds, the dielectric fluid serves not only as a "discharge medium" but also fulfills multiple critical functions: ​​cooling, debris removal, gap stabilization, surface quality enhancement, and safety/environmental compliance​

The ​​pin-point gate​​ (also called a needle valve gate or pinpoint gate) is a widely used gating method in injection molds. Its small, concentrated gate size makes it ideal for precision parts with high aesthetic requirements and minimal post-processing allowances.

The barrel of an injection molding machine accumulates residues such as plastic, carbonized deposits, and colorants. These contaminants can degrade product quality and even damage the equipment. Regular barrel cleaning is essential to maintain machine performance and ensure consistent production.