Pressure die casting with zinc-based alloys is one of the most efficient and versatile high-volume production methods used to manufacture strong, accurate, complex and intricately shaped metal components.
Pressure die casting process
The process is carried out in an automatic machine designed to withstand high pressure. The molten metal is pushed by a hydraulically actuated plunger into a two-piece steel die containing one or more cavities, each an exact inverse replica of the part or parts being produced. Because of the rapid cooling and solidification that occurs when molten metal comes into contact with the relatively cool steel die, and because of the resulting fine metallurgical grain structure, the mechanical properties of pressure die castings are generally superior to castings produced by other methods.
Zinc pressure die castings, for example, are stronger than sand-cast 356-T6 aluminium, SAE 40 bronze and class 30 cast iron. In addition, pressure die cast components produced using ZA alloys are stronger than pressure die cast aluminium 380 alloy.
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