Die castings are precision metal components formed through the die-casting process. The core principle involves injecting molten metal into a specially designed mold cavity at high pressure (ranging from several megapascals to dozens of megapascals) and high speed (0.5-70 m/s). After rapid cooling and solidification, durable parts with strict tolerances and complex geometric shapes are obtained. Due to the prominent characteristics of high pressure and high speed, this process far surpasses traditional casting methods in terms of dimensional accuracy (reaching ±0.01 mm level), forming complexity (capable of achieving 0.3 mm thin-walled and deep-cavity structures), and production efficiency, making it a key foundational process in modern manufacturing.
The core of a die-casting system lies in the mold and equipment. Molds are typically made of hardened tool steel and consist of a fixed half and a movable half. When closed, they form a sealed cavity, and the built-in cooling and ejection systems can significantly improve production efficiency. Equipment is categorized into two types based on metal melting points: Hot-chamber die-casting machines are suitable for low-melting-point materials such as zinc and magnesium. For example, the Yizumi HM series ensures precision production in the 3C industry through a two-stage controlled injection system; Cold-chamber die-casting machines, on the other hand, are designed for high-melting-point materials like aluminum and copper. The Yizumi HII-S series achieves a balance between high precision and low energy consumption with its advanced hydraulic system.
Aluminum alloy die castings have transformed new energy vehicle manufacturing from scattered processing to integrated molding. Meanwhile, die-cast components in heat dissipation systems, with complex internal channels, boost battery cooling modules' heat transfer efficiency by over 20%.
3C and Electronic Industries:
Zinc alloy and magnesium alloy die castings, with their precision forming capabilities, are used in mobile phone middle frames, connectors, and other components. The high-speed cycle system of hot-chamber die-casting machines can meet the needs of mass production.
High-end Manufacturing:
Copper alloy die castings support the heat dissipation needs of 5G base stations, while magnesium alloy precision parts are used in medical equipment. In the aerospace field, vacuum die-casting technology (with a cavity vacuum℃of <=50 mbar) is employed to produce structural parts with a tensile strength of >=220 MPa.