PRESS-MOLD FOR MAKING BIMETALLIC CYLINDERS Russian patent published in 1995 - IPC

FIELD: casting of metals. SUBSTANCE: press-mold for making bimetallic ribbed cylinders includes a mold-half with a pouring gate system and with an insert in the form of a cast iron sleeve. One of the mold-halves is in the form of a metallic pan with a centering insert for the cast iron and with the pouring gate system for low pressure die casting, the other of the mold-halves is in the form of sand or ceramic cores, having ribbed shaping surface and an annular protrusion in its upper part, embracing the sleeve. Spikes are provided in a plane of the pan for fixing the cores; the press-mold is provided by an upper spring-loaded plate for pressing the cores. EFFECT: enhanced quality of cylinders. 1 cl, 1 dwg