High pressure die casting
The die casting process consists in injecting molten metal at high speed and under high pressure in a high grade mould. Filling times are 10 to 50 milliseconds. The gate speed of the metal is 20 to 40 m/sec. Specific pressures on the metal are 200-500 bar for zinc alloys and 400-1000 bar for aluminium alloys. The temperature is 425°C for zinc alloys and 670°C for aluminium alloys. Die casting machines and peripheral equipment are completely automated and the process parameters are controlled.