(Aluminum alloy or zinc alloy)
Chill mold casting
Using the force of gravity, aluminum is poured into a cast iron mold.
Low-pressure (1-2 bars) is exerted on the aluminum bath. There is a riser tube in this bath. As a result of the pressure the aluminum rises in the riser tube. In this way the mold is slowly filled from below.
Using high-pressure up to 1500 bars aluminum is poured into the mold (previously called die-casting). The process consists of three phases. In the first phase the material is displaced into the mold. In the second phase the mold is filled at high speed. Finally in the third phase the aluminum is compacted, at which time all shrink holes forming during the shrinkage of the materials are pressed out.
A fraction of a second before casting the die is subjected to a vacuum. As a result the die is 95% evacuated of air, thereby preventing air inclusions. This is very suitable for pressure-tight parts and products that have to withstand loads.
The process of high pressure casting at this time is continuously measured, and corrected even in the process itself if the ongoing process deviates from the set parameters.