as cooling fins and at the same time structurally reinforce the mold liner to prevent creep application_number US 73623976 A description in the drawings fig1 illustrates a substantially conventionally shaped monolithic electroslag remelting mold 10 which is used for production of high quality metal ingots the mold is provided with a copper alloy liner 11 which includes a surface 12 constituting the confining face of the mold the mold has an open bottom and rests on a starter plate 14 which in turn is carried on the top of a mold car 15 also preferably water cooled the top of mold car 15 may be water cooled from its underside the starter plate 14 is usually composed of steel and receives the entire lower area of mold 10 extending beyond the outer periphery thereof in fig1 the manifolds 22 and 25 and conduits 26 preferably incorporated with mold 10 are illustrated on its exterior for the purposes of clarification referring to fig2 it will be seen that the surface 16 which is exposed to cooling water has a plurality of ribs 18 which define between them a plurality of slots as indicated by reference numeral 17 slots 17 extend substantially vertically along substantially the entire area of each wall of the liner 11 and are preferably of a general character illustrated in fig2 or may be.