FIELD: processes and apparatuses for casting parts having inner openings or cavities.
SUBSTANCE: method comprises steps of forming openings and (or) cavities by placing into casting mold one or more casting cores made, for example of sand; making main casting core in core box together with one or more additional casting cores designed for combining with main casting core; applying at least on one additional casting core in its predetermined zones standard-thickness coating made of material destructed at contact with melt metal; forming two coaxial openings in casting core and in layer of coating material; placing in said openings guide for valves of inlet and outlet ducts of head of cylinder unit; placing monolithic group of cores with coating into casting mold for pouring metal. It is possible to make cores onto which coating is to be applied in the form of hollow inserts made of heat resistant material and filled with sand and polymerized resin.
EFFECT: improved quality of cast parts.
13 cl, 10 dwg
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