What is zinc die casting?
The manufacturing process involved in zinc die casting is roughly the same as that used in the production of pre-fabricated concrete building materials such as the hollow blocks that commonly go into the construction of houses. The big difference of course is in the material used. Water, cement and aggregates such as gravel and sand are used In pre-fabricated concrete, while in zinc die casting, molten zinc is the base material.
High pressure is used to inject the molten zinc into a steel mold or die cast. This high-pressure injection system is necessary to immediately fill the entire cavity of the die before any part of zinc casting hardens or solidifies. Immediate filling of the die cavity help prevent discontinuities in the zinc die casting. To further help ensure that the zinc casting is injected even into difficult-to-fill sections of dies with thin parts, the molds are designed with vents to allow air to escape during the injection process.
Most of the molds used in the zinc die casting are water-cooled to help hasten the production process. Once the injection is complete, the molds are opened and the die castings are ejected. The finished zinc castings may amount to thousands or hundreds depending on the design of the die cast.
