An Example in
Steel Casting -- Lever Arm in the BMW Engine Valve Train
Countergravity Low
Pressure Air (CLA)
Countergravity
low pressure air (CLA) casting has several advantages in producing the lever arms.
The
differential pressure under which the metal is drawn into the mold ensures fill-out of
very thin sections and fine surface details in the mold.
Metal
flow is less turbulent, reducing oxide inclusions and other
turbulence- related defects.
Return of the
molten metal from the sprue and gates to the crucible following casting improves
casting-to-gate ratios and dramatically reduces alloy costs.
