Die Casting Zinc Parts. Die casting is a very common process of manufacturing metal parts. In the process of high pressure die casting, molten metal alloy such as aluminum alloy is injected into a mold called a die. The metal is left in the steel mold until it solidifies and then it is removed.
There are two types of machines that are used in die casting. First is the hot chamber machine, also called piston or gooseneck machine, and the second is the cold chamber machine. The hot chamber machine has the metal injection device, or gooseneck, submerged in the molten metal within the holding furnace. This machine works by having the gas or oil-powered piston retracted and allowing the molten metal to fill the gooseneck. The molten metal is then forced out of the gooseneck by the piston and the metal goes into the die. Not all metal alloys can be used in the hot chamber machine. Due to this, cold chamber die castings must be made. Aluminum and metals with high melting points like copper, magnesium, and zinc alloys need the cold chamber machine. The cold chamber machine doesn’t have the piston immersed in the molten metal. Before using the cold chamber machine, the metal must be melted first in a separate furnace. Then the molten metal is brought to the cold chamber machine and injected into a cylinder and a hydraulic piston forces the metal into the die. Cold chamber die castings take longer to produce because the metal has to be melted in an unconnected furnace.
It doesn’t matter whether parts are hot chamber or cold chamber die castings. Both these products are made using the wonderful manufacturing process known as die casting.
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