High Pressure Die Casting
High pressure Die Casting is an ideal process for the manufacture of high volume parts that require high dimensional accuracy and good surface finish with a minimum of machining.
This is a repetitive process which produces high strength and allows for castings to be made with a thinner wall sections than those of the sand or gravity process e.g. 1.5-3mm.
High pressure die castings cannot be heat treated, but they can be treated in order to improve dimensional and metallurgical stability.
Castings may be quenched from the side and machine size will limit casting size. Sound thick sections are difficult to cast and core configurations must be complex to enable dis-assembly.
High pressure castings can suffer from porosity, although evacuated chamber and other techniques may reduce this. High start up costs are only reduced by long casting runs, this delivering low unit cost with high volume production.