Die-casting processes inject molten metal into the mold under high pressure and result in parts with high uniformity, good surface finish and dimensional accuracy. There are 2 types of die-casting processes: the cold chamber process and the hot chamber process.

In the cold camber process, the metal is melted in a separate furnace. The molten metal is poured into the die-casting machine. The cold chamber process is mostly used for aluminum alloys and brass alloys which has high melting temperature.

In the hot chamber process, the furnace is part of the machine. The injection mechanism is submerged in the molten metal. The hot chamber process is faster than the cold chamber process because there is no ladling operation involved. Hot chamber process is mostly used for zinc alloys which has low melting point.

Zinc die casting has a broad range of application due to the exceptional physical and mechanical properties of zinc alloys. The superior melting flow characteristics of zinc alloys allow zinc die cast to have better dimensional precision, geometric complexity, and thinner walls design. Zinc die casting is especially suitable for small parts with high dimensional precision requirements such as gears and lock mechanism. Zinc die casting also offers superior surface finish that is ready to be plated.