Die casting machines can be divided into two different types, hot chamber die casting machines and cold chamber die casting machines, the difference being how much force they can withstand, with typical pressures ranging from 400 to 4,000 tons. Cold chamber die casting can be used when die casting metals that cannot be used in the hot chamber die casting process, including aluminum, magnesium, copper, and zinc alloys with a high aluminum content. In this process, the metal is first melted in a separate crucible. A certain amount of molten metal is then transferred into an unheated injection chamber or injection nozzle. By means of hydraulic or mechanical pressure, the metal is injected into the mold. The biggest disadvantage of this process is the long cycle time due to the need to transfer the molten metal into the cold chamber. There is also a difference between vertical and horizontal cold chamber die casting machines. Vertical die casting machines are usually small machines, while horizontal die casting machines come in a variety of models.