What Is Zinc Die Casting?
Zinc die casting is a process or product created using a method where high-temperature molten zinc is poured into a precision mold at high pressure and speed, forming a metal shape instantly. It is known for its extremely high dimensional accuracy and strength, as well as the flexibility it offers in producing a wide range of shapes. Due to these excellent characteristics, zinc die castings are used for a broad spectrum of products, ranging from daily necessities to industrial items.
Applications of Zinc Die Casting
Zinc die casting is utilized in various applications:
1. Architectural Hardware
It is used in architectural hardware for interior furnishings, including door knobs in residential spaces, made using zinc die casting. This technique allows for smooth surfaces that can be plated with metals like gold, silver, copper, chrome, nickel, or painted, offering diverse finishes.
2. Toys and Industrial Parts
Metal toys known as “superalloys” from the 1970s, characterized by their detailed shapes and substantial weight, are products of zinc die casting. In industry, it’s used for complex mechanical components such as motor shaft parts, gears, and transmission parts for vehicles and medical equipment, leveraging zinc‘s low melting point and precision.
Properties of Zinc Die Casting
Zinc, compared to aluminum alloys used in die casting, is stronger and allows for longer mold use, leading to significant production cost reductions. Additionally, its high electrical conductivity minimizes energy loss in mechanical and electrical parts, and its lower melting point eases the joining and processing of parts.
Characteristics of Zinc Die Casting
1. Suitability for Surface Treatment
Zinc die casting products, characterized by their smooth surface, are conducive to various finishing processes like plating or painting.
2. High Dimensional Accuracy
Offering higher precision than methods like plastic injection molding or gravity casting, zinc die casting is particularly advantageous for automotive parts and other precision-required applications.
3. Thin-Walled and Lightweight
The low melting point of zinc facilitates the production of thin-walled, lightweight products, making it an excellent choice for intricate designs.
4. High Mass Productivity
Zinc die casting is especially suitable for mass production, with molds lasting for a significantly higher number of uses compared to aluminum die casting.
Types of Zinc Die Casting
Two primary zinc alloys used in zinc die casting are ZDC1 and ZDC2, differing mainly in their copper content. ZDC1, with higher copper content, is chosen for its superior mechanical properties and corrosion resistance. In contrast, ZDC2 is preferred for interior furnishings and fittings requiring aesthetic finishes.