Surface treatments for injection-molded parts can be categorized into three main types: ​​decorative treatments​​, ​​functional treatments​​, and ​​physical/chemical pretreatments​​.

In injection mold design, the layout of venting slots is critical for ensuring efficient air evacuation and improving molding quality. A well-planned venting slot layout not only effectively prevents defects such as air pockets, short shots, and burn marks but also extends mold lifespan and enhances production efficiency.

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 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.

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.

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.

In injection molding, the sequential timing control of hot runner systems is primarily used to precisely manage the opening/closing sequence of each parting line (or valve pin and bushing) and heating temperatures. This ensures uniform cavity filling, prevents cold slug blockages, and avoids over-packing.

Injection molding venting is a critical process step. The effective venting design ensures the surface quality of plastic parts, preventing defects such as short shots, burn marks, and gas traps, but also extends mold lifespan and enhances production efficiency.

The heat treatment objectives (stress relief, pre-hardening, hardening, tempering, nitriding, etc.) and process parameters vary significantly across mold materials due to differences in chemical composition and application.

During the injection molding process, gas accumulation inside the mold is one of the primary causes of product defects. If these gases cannot be promptly expelled, they can lead to quality issues such as short shots, burn marks, bubbles, and visible weld lines.