Permanent Mold Casting

Permanent mold casting is usually called gravity die casting. In gravity die casting molten aluminum is poured into a metallic tool. The casting temperature is about 750°C. The tolerances and surface finish are good. The use of sand cores enables casting of very complex components.
Gravity die casting method is competitive when the lot size is relatively small or when heat treatment is needed to improve the mechanical properties. This casting method gives better tolerances and surface finish than sand casting. The tooling costs are somewhat higher than by sand casting