Patent ID: 6035923
Filing Date: 2000-03-14
Classification: B22D,B22F,C22C,F02F,F05C

Abstract:
A method for casting comprising the steps of:forming a porous composite forming material which has a volume factor of 5 to 20% into a shape of a portion of a product,holding said porous composite forming material in a cavity of a casting mold in such a manner that said material is brought into contact with an inner surface of the casting mold,pouring molten light alloy into the cavity of the casting mold,introducing gas into the cavity of the casting mold at a pressure of 0.5 to 10 kg/cm.sup.2 with a gate of the cavity closed while the introduced gas causes gas in the composite forming material to come out and be released through a gas release passage formed in the casting mold and in communication between an inside and an outside of the cavity, thereby impregnating the pores of the porous composite forming material with the molten light alloy, andforming said portion by compounding the light alloy and the composite forming material.