To provide a method for casting a vehicle wheel under a low pressure, by which a flawless casting can be performed and thereby, the vehicle wheel best suited for meeting high strength and high tenacity requirements can be cast under a low pressure, in the method for casting the vehicle wheel using a low Si aluminum alloy under a low pressure.
In the method for casting the vehicle wheel, the casting process is performed in a mold of such a shape as corresponding to the vehicle wheel having a rim and a disc, a center gate is provided in the center of a cavity for forming the disc, and a side gate is provided in a cavity for forming the rim. Further, a molten metal of the aluminum alloy to be used is composed of 1.0 wt.% or lower of Cu, 2.4 to 4.6% of Si, 0.25 to 0.5 wt.% of Mg, an unavoidable impurity element and the balance Al and injected from each of the gates.
ONISHI SANETSUGU
USUI KENJI
Next Patent: COATING DEVICE USING SUCTION FORCE