Compression molding dies are molds used for forming thermosetting resins, rubber, composite materials, and other similar substances. Material (such as preforms, sheets, or powder) is introduced into a heated mold cavity, clamped between the upper and lower molds, and then heated while being compressed at high pressure. This causes the material to flow and cure, forming the desired product shape. This processing method is suitable for manufacturing parts that require high dimensional accuracy, excellent mechanical strength, heat resistance, and chemical resistance. Key applications include automotive parts (tires, gaskets, brake pads), electrical and electronic components (connectors, switches, housings), aerospace components, FRP products, and tableware. It is characterized by minimal material waste and the ability to mold with relatively simple mold structures.