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Precision Die Casting

Die casting is a metal casting process that forcing molten metal under high pressure into a mold cavity. The mold cavity is created using two hardened tool steel dies which have been machined into shape.

Die casting is a one of a manufacturing process that can produce geometrically complex metal parts through the use of reusable molds, called dies. This process involves the use of a furnace, metal, die casting machine, and die. The metal, typically a non-ferrous alloy such as aluminum or zinc, is melted in the furnace and then injected into the dies in the die casting machine. There are two main types of die casting machines – hot chamber machines (used for alloys with low melting temperatures, such as zinc) and cold chamber machines (used for alloys with high melting temperatures, such as aluminum). After the molten metal is injected into the dies, it rapidly cools and solidifies into the final part, called the casting.

Cold Chamber Casting

Cold Chamber Casting start with melting the metal in a separate furnace. Then a precise amount of molten metal is transported to the cold-chamber machine where it is fed into an unheated shot chamber. This shot is then driven into the die by a hydraulic or mechanical piston. This system is slower cycle time compare to hot chamber casting due to the need to transfer the molten metal from the furnace to the cold-chamber machine.

Hot Chamber Casting

Hot-chamber die casting, also known as gooseneck machines, rely upon a pool of molten metal to feed the die. At the beginning of the cycle the piston of the machine is retracted, which allows the molten metal to fill the “gooseneck”. The pneumatic or hydraulic powered piston then forces this metal out of the gooseneck into the die. The advantages of this system include fast cycle times and the convenience of melting the metal in the casting machine.