FIELD: manufacture of hollow articles such as blades of gas turbine engine by casting with use of penetration cooling.
SUBSTANCE: method comprises steps of making article with use of composite ceramic core produced by two stages; placing preliminarily made and fired additional cores into pattern press-mold; making pattern and placing it into core press-mold; at temperature 90 - 110°C pressing-in ceramic mass for making main core to be joined in press-mold with additional cores as one piece; removing pattern and subjecting composite core to high-temperature annealing. Ready article features 3 - 5 accuracy class and surface of 3 - 5 purity class.
EFFECT: enhanced quality of articles.
2 cl, 3 dwg, 1 ex
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