METHOD OF MAKING CASTING MOLDS Russian patent published in 1995 - IPC

FIELD: casting production. SUBSTANCE: method of producing high quality casting mold with use of sand compaction procedure, providing uniform sand compaction along a height of a flask and also a high-density surface layer of the sand (cold hardened layer) along a profile of a pattern with subsequent precision dyeing of a working surface of the mold, comprises steps of preliminarily forming of a shaped block of the sand by lifting a pattern plate from downwards and then descending to its initial position, quickly moving a pressure plate together with a shaped lump of the sand until its impinging with a pattern fitting (rapid pressing); precision dyeing of the mold by applying a paint onto the pattern fitting before the rapid pressing and the sand lump impinging with the pattern; controlling compaction process according to a value of a gap between the shaped surface of the sand block and the pattern plate in its initial position. EFFECT: enhanced quality of casting mold. 2 cl, 4 dwg