Patent ID: 8863999

Claim:
A casting nozzle which supplies molten metal of pure magnesium or magnesium alloy into a twin roll movable casting die, the casting nozzle comprising: a main body having an inner surface, wherein a portion of the inner surface includes an inner coating layer applied thereto, the inner coating layer comes into contact with the molten metal; a molten metal contact portion which comes into contact with the molten metal; a casting die contact portion which is formed at a leading end of the nozzle and which comes into contact with the twin roll movable casting die; and a pouring port, positioned at a tapered end side of the main body, from which the molten metal is poured into the twin roll movable casting die through an opening of the pouring port, wherein: the casting die contact portion is formed of thermal insulation material, a melting point of the pure magnesium or magnesium alloy is Tm C.°, the inner coating layer to be brought into contact with the molten metal of Tm+10° C. or more is formed of low oxygen material, the low oxygen material having an oxygen density of 20 mass % or less, a portion of an inside surface of the pouring port adjacent to the pouring port opening to be brought into direct contact with the molten metal below Tm+10° C. is formed of a high oxygen material and does not include the inner coating layer, and the thermal insulation material is provided with pores therein.