USING ZINC IN DIE CASTING. The process of die casting has been used to manufacture small and medium sized parts for use in various industries for over a hundred years. It started out as mainly lead and tin based die casting parts primarily used for the manufacture of metal types used in the offset printing process. Other metals such as aluminium, zinc, and magnesium were soon used in the die casting process. Die casting parts were also expanded to cover not only the printing industry but other industries like sports equipment, automotive parts, electronics components, and telecommunication parts as well. Among the metals used in these die casting parts, zinc is the most popular choice of manufacturers because of their durability and flexibility in terms of use.
The zinc die casting process is not any different from die casting processes involving other metals. Zinc die casting parts are mainly manufactured using any of the two die casting processes, the hot-chamber and the cold-chamber processes. Zinc’s low burning point makes it versatile enough to be used in any zinc die casting process. The main step common between the two processes is the metal injection step. In any zinc die casting process, the molten metal is injected into dies made of hardened steel tool to be formed into the desired part design. The difference lies in the way that the metal is melted and injected into the die.
In the hot-chamber process, metal is melted into a pool of metal that is fed directly into the dies. In the cold-chamber process, on the other hand, metal is melted in a separate furnace and then moved on into another chamber before it is injected into the dies. Both processes result in zinc die casting parts that are able to withstand normal wear in their intended usage.
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