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AssigneeSafran
InventorsAdrien Bernard Vincent Rollinger, Mirna Bechelany
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A ceramic core used for fabricating a hollow turbine blade for a turbine engine using the lost wax casting technique, the blade including calibrated dust-removal holes emanating from a top of at least one cavity and opening out into a bathtub of the blade, wherein each of the calibrated dust-removal holes is formed in a core portion of height that is determined to be sufficient to guarantee mechanical strength, the core portion including a through orifice of axis perpendicular to a longitudinal axis of the calibrated dust-removal hole and defining on either side of the through orifice firstly a core cylinder having a determined diameter corresponding to the dust-removal hole that is to be formed, and secondly a remaining core volume that is to be plugged after casting, such that the calibrated dust-removal hole is obtained without drilling and without using connection rods.
A ceramic core used for fabricating a hollow turbine blade for a turbine engine using a lost wax casting technique, said blade including a plurality of calibrated dust-removal holes emanating from a top of at least one cavity and opening out into a bathtub of said blade, wherein each calibrated dust-removal hole of said plurality of calibrated dust-removal holes is formed in a core portion of height that is determined to guarantee mechanical strength, said core portion including a through orifice of axis perpendicular to a longitudinal axis of said calibrated dust-removal hole and defining on either side of said through orifice firstly a core cylinder having a determined diameter corresponding to said calibrated dust-removal hole that is to be formed, and secondly a remaining core volume that is to be plugged, after casting, such that said calibrated dust-removal hole is obtained without drilling and without using connection rods.
Dependencies are inferred from the claim text.