Injection molds are the core of plastic part mass production, accounting for 70% of plastic processing.
Fixed half + moving half + runner system + cooling system + ejection system. Can have 1 to dozens of cavities per mold.
Types: 2-plate (most common), 3-plate (for pin-point gates), hot runner (no waste).
718H (pre-hardened, HRC33-38, general use), NAK80 (mirror finish), S136 (corrosion resistant, for transparent parts).