Mold for use in continuous metal casting

Claim 1

A mold for use in a continuous metal casting in which compressed gas is supplied between a molten metal and an inner surface of the mold to form a gas film therebetween and said molten metal is pulled out in a downward direction of the mold, thereby continuously metal casting, said mold comprising: a porous layer consisting of sintered powder forming said inner surface of said mold, wherein said porous layer comprises: a sintered metallic powder layer forming an upper portion of said inner surface; a sintered layer of ceramic and metallic powder forming a central portion of said inner surface below said upper portion, said sintered layer of ceramic and metallic powder extending to a bottom of said mold, and a sintered ceramic powder layer forming a lower portion of said inner surface, said ceramic powder layer covering said ceramic and metallic powder layer at said lower portion of said inner surfaces, whereby excessive wear of said porous layer is prevented and peeling of said lower portion of said inner surface is prevented; a shielding plate consisting of material having a desirable thermal transfer property provided on the outside of said porous layer; and mechanical means integrally coupling said porous layer and said shielding plate, said porous layer and said shielding plate forming a gap portion therebetween for introducing said gas.