FIELD: foundry.
SUBSTANCE: invention can be used to manufacture a hollow blade of a turbine engine. Refractory core (12, 112) for making blade (10) using casting technology in melted model comprises main body (14, 114) and at least one casing (16, 116), connected to main body (14, 114) and limiting cavity (18, 118) between main body and casing, wherein casing (16, 116) is assembled so as to come into contact with blade (10) during manufacturing, and cavity (18, 118) is closed to ensure that casting material does not penetrate into cavity during casting of blade (10).
EFFECT: invention increases strength of the blade.
11 cl, 4 dwg
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