抄録
An electromagnetic valve for molten metal has been studied for application to low pressure casting. It consists of a magnet and an electrode which has a vertical valve hole passing molten metal. Electric conductivity of molten metal is considerably large compared to that of the electrode which the electric current mainly passes through the molten metal. Thus, a strong electromagnetic force is generated in the valve hole and enables the molten metal to be held without metal leaking from the vertical valve hole. The holding height of molten tin was measured for various valve shapes. It was found that the contact state between the molten metal and electrode in the valve hole dominantly determined the characteristics of the valve. When the contact state was continuously uniform. the molten metal was stable. Good agreement between the experimental and numerical holding heights was therefore obtained.
