Die Casting: Die Casting (压铸)
A process that injects molten zinc alloy into a steel mould under high pressure to form slider bodies. Die casting gives good dimensional accuracy, thin walls and fine surface detail at high output. Mould temperature, injection speed, pressure and cooling affect porosity, shrinkage and strength. Castings are trimmed, tumbled and polished before plating. Internal porosity can cause blistering after plating, so process control and sampling are important.