Similar to injection molding, after mold making, die casting parts can be made in a die-casting machine. The die-casting process consists of four main stages: preparation, filling, ejection, and shakeout.

However, the casting process varies slightly depending on whether a hot or cold chamber is used. These two high-pressure die-casting processes have different advantages: one is suitable for high-speed casting, while the other is suitable for a wider range of casting materials.

Hot Chamber Die Casting

During hot chamber die casting, a metal dies casting machine contains the necessary equipment to heat the metal to a molten state. Because it is a self-contained system, it is much faster and has shorter cycle times than alternatives, but it is only suitable for selected casting materials, including zinc, tin, and lead alloys.

Cold Chamber Die Casting

The cold chamber die-casting process requires a separate furnace to heat the metal. This naturally reduces productivity because ladles must be used to bring the molten metal to the die-casting machine. However, since a separate furnace is more powerful than a hot chamber die-casting machine, metals with high melting points can be cast. This method is suitable for cast aluminum.

Regardless of whether using a hot chamber machine or a cold chamber machine, the metal die-casting process usually proceeds as follows: Mold preparation, Filling, Ejection, and Shakeout.

During mold preparation, the inner surfaces of the two mold halves are lubricated to facilitate demolding after the casting is complete. The mold halves can then be closed and secured with locking pins.

NingBo GSK Powder Metallurgy Co., Ltd. is a stamping auto parts manufacturer that manufactures and wholesales Die Casting Parts, MIM-Lock Parts, and more.