Cold chamber aluminum die casting process is one of the two major branches of die casting operations. One of the main differences between cold chamber die casting and hot chamber die casting is that in hot chamber die casting the source of molten material is attached to the machine, while in cold chamber die casting the molten metal is introduced to the shot chamber from an external source. Cold chamber aluminum diecast machines are used for alloys with high melting temperatures such as aluminum, brass, and magnesium. These alloys are not casted in hot chamber machines because they would damage the pump system. Cold Chamber diecast machines use an open holding pot that is kept separate from the die cast machine. The transport of the molten is typically done using a ladle, which can be done automatically or manually when casting aluminum alloys. Casting cycles can range from 10 seconds for small diecast machines up to two minutes for a large diecast machine.

The Cold chamber aluminum die casting process is more popular in the manufacturing industry due to its cheaper production costs and durability.