View CLV illustration. Briefly, metal is melted in a vacuum in the lower chamber of the casting machine. The hot mold is introduced in a separate upper chamber and a vacuum is created there. Both chambers are back filled with Argon. A valve is opened and the melt is raised until the snout of the sprue enters the molten metal.
Additional vacuum is applied to the upper chamber to draw the metal up.
The vacuum is released after the parts and gates have solidified. The CV process enables the countergravity casting of large configurations. These new generation casting machines increase production throughput and process efficiency dramatically and achieve previously unattainable levels of casting quality. This Simple Experiment Take two clear drinking glasses and fill one with water. Pour the water from the full glass into the empty glass and observe the resulting splatter, turbulence and the mixing of air in the liquid.