In the high pressure die casting process the metal is forced into a high grade steel tool at high speed and -pressure. The casting temperature is roughly 700°C during casting. The use of vacuum casting technology is an advantage in order to achieve superior quality for light and thin walled components.
High pressure die casting is a competitive casting method when components have requirements which cannot be achieved by other casting processes such as:
The need for machining is relatively low due to the close casting tolerances. The tooling costs are generally higher than for gravity die casting or low pressure die casting.
In the low pressure die casting process the metal is transferred from an air tight furnace through a rising tube into a metallic tool. The casting temperature is about 750°C.
Low pressure die casting is competitive casting method when the production quantity is relatively small and/or when heat treatment is needed to improve the mechanical properties. The tolerances and the surface finish are the same as achieved by gravity die casting. The tooling costs are somewhat higher than by sand casting.