MOULD CORE UNIT FOR MANUFACTURING OF TURBO-MACHINE BLADE, CORRESPONDING BLADE MANUFACTURING METHOD AND BLADE Russian patent published in 2017 - IPC B22C9/10 

FIELD: metallurgy.

SUBSTANCE: cast core unit (30) is used for the blades manufacture, it contains the core element (31) to form the various internal cavities (19a-19e) of the blade and the second core element (32) for forming the bath cavity (18). The core element (31) contains the inner cores of the front edge cavity (31a), of the central cavity (31b-31d) and of the rear edge cavity (31e). The inner core (31d) of the central cavity, adjacent to the inner core (31e) of the rear edge cavity has the convexity, which is formed in the direction of the core (31a) of the front edge cavity.

EFFECT: elimination of the cracks formation in the core elements.

9 cl, 5 dwg