Tilting casting

gating system and mould design of aluminum alloy air intake manifold were described. Aiming at shrinkage hole （porosity） defects which often exists in castings

processing sketch was rationally optimized. The aluminum alloy air intake manifold was manufactured successfully by tilted casting with ingate section of 1 500 mm2 and mould pre-heating at 200～250 ℃ and pouring at about 710 ℃ for 9.5 s

in which the shrinkage hole （porosity） was eliminated by adopting air-venting from core print and quickly cooling for the thick location as well as feeding

improving the casting quality.