Auxiliary device for use with a permanent mold in casting operations

An auxiliary device for use with a permanent mold in a casting operation comprising a metallic cover plate having an upwardly facing surface and an oppositely directed downwardly facing surface with the downwardly facing surface arranged to bear on the top of the permanent mold and to form the upper limit of the mold cavity within the permanent mold, a first opening through said cover plate extending between the upwardly and downwardly facing surfaces and said first opening arranged to open into the mold cavity, a first pipe formed of a refractory material extending downwardly into the first opening in said cover plate, said first pipe having a lower end located substantially in the plane of the downwardly facing surface of said cover plate, and an annular recess encircling and spaced radially outwardly from the opening in the lower end of said first pipe and said recess located in at least one of the adjoining surfaces of the downwardly facing surface of said cover plate and the lower end of said first pipe and open to the mold cavity, said recess being closed inwardly of the opening therefrom into the mold cavity so that molten metal overflowing into the recess from the mold cavity is retained therein and solidifies forming a seal, said first pipe adapted for feeding molten metal into the liquid core in the casting after the completion of the pouring operation as the molten metal within the mold cavity commences to solidify.