METHOD FOR THE FORMATION OF DUST REMOVING HOLES FOR THE TURBINE BLADE AND THE COUPLED CERAMIC CORE Russian patent published in 2021 - IPC B22C9/10 

FIELD: foundry.

SUBSTANCE: invention relates to the field of foundry and can be used in investment casting. The ceramic core (10) is intended for the manufacture of a hollow blade for a turbine engine, made with calibrated dust removing holes emanating from the top of at least one cavity of the blade and opening into its tank. The core (10) contains a section of the height that is sufficient to ensure its mechanical strength, forming a calibrated dust removing opening of the blade. The specified section of the core contains a through hole, the axis of which is perpendicular to the longitudinal axis of the core section forming a calibrated dust removing hole in the blade, and on both sides of the through hole it defines a core cylinder (30), the diameter of which corresponds to the formed dust removing hole, and the remaining volume (33) of the core, made with the possibility of clogging after casting. The calibrated dust removing hole is obtained without boring and without the use of connecting rods.

EFFECT: simplification of obtaining dust removing holes without reducing the strength of the core.

10 cl, 7 dwg