How Aluminum Die Casting Works

The working principle of aluminum die casting is to inject molten metal into the cavity of a precision metal mold at high pressure and at high speed. The molten metal cools and solidifies into a casting under pressure. The specific process is as follows:

‌High-pressure injection‌: Compressed air is introduced into a sealed container to maintain a certain gas pressure. The aluminum alloy liquid rushes into the mold from bottom to top under pressure and enters the cavity smoothly through the pouring port.
‌Cooling and solidification‌: The molten metal is subjected to pressure in the mold cavity and gradually cools and solidifies into a casting. This process is similar to injection molding.
‌Pressure holding treatment‌: After the molten metal fills the cavity, pressure holding treatment is required to control shrinkage and ensure the quality of the casting.
‌Removing the casting‌: After the casting is completely solidified, the pressure is released and the casting is ejected from the mold to complete the entire die-casting process.