Abstract: The invention relates to the field of casting, and more particularly to a method of producing a ceramic core (1) for casting, said core (1) presenting a shape that includes at least a first lateral protuberance (11), and the method comprising at least a step of injecting a paste comprising a ceramic granulate and a polymer binder into a mold cavity In order to form a part (10) presenting a shape corresponding to the shape of the core (1) together with at least one additional lateral protuberance (15) adjacent to said first lateral protuberance (11), a step of firing the part (10), and a step of eliminating said additional lateral protuberance (15) from the part (10) after said firing step.

Abstract: The invention relates to the field of casting, and more particularly to a method of producing a ceramic core (1) for casting, said core (1) presenting a shape that includes at least a first lateral protuberance (11), and the method comprising at least a step of injecting a paste comprising a ceramic granulate and a polymer binder into a mold cavity In order to form a part (10) presenting a shape corresponding to the shape of the core (1) together with at least one additional lateral protuberance (15) adjacent to said first lateral protuberance (11), a step of firing the part (10), and a step of eliminating said additional lateral protuberance (15) from the part (10) after said firing step.

Abstract: A tooling for fabricating a foundry core, for making a circuit for cooling a blade of a turbine engine, the tooling including: a mold for injecting a paste and including imprints for a first portion and a second portion of the core; a mechanism bearing against and/or engaging end portions of a ceramic rod that interconnects the portions of the core and that passes through the imprint for the first portion of the core; and a support mechanism in the imprint for the first portion of the core to support a substantially middle portion of the rod.

Abstract: A tooling for fabricating a foundry core, for making a circuit for cooling a blade of a turbine engine, the tooling including: a mold for injecting a paste and including imprints for a first portion and for at least one other portion of the core; a mechanism bearing against and/or engaging end portions of at least one ceramic rod that interconnects the portions of the core and that passes through the imprint for the first portion of the core; and a support mechanism in the imprint for the first portion of the core to support a substantially middle portion of the or each rod.

Abstract: A mold for producing a part, such as a turbomachine blade model, by injecting wax into a cavity, the cavity including at least two cavity elements, each of which is supported in a cavity block. The two cavity blocks are mobile relative to one another between a closed position for injecting the wax and an open position for removing the part following the injection of the wax. The two cavity blocks are mobile in a horizontal plane.

Abstract: A tooling for injection-molding a part, the tooling including two cavity blocks each including a cavity formed therein of a shape corresponding to a shape of a part that is to be molded once the cavity blocks have been superposed, at least one of the cavity blocks including an ejection mechanism ejecting the molded part and including at least one ejector movable between a molding position and an ejection position. The ejector is guided to move between its two positions along a curved path, or a circular arc, of shape that corresponds to a shape of a portion of the mold part to be extracted from the cavity.

Abstract: An injection mold producing a model of a turbine engine blade, including: a top surface that folds onto a bottom surface, both surfaces including long rods for supporting a core generating cooling cavities inside the blade, wherein the long rods of the bottom surface are configured to contact a first surface of the airfoil at bearing points, and the long rods of the top surface are configured to contact a second surface of the airfoil at clamping points; at least one short rod extending from one of the surfaces of the mold and pointing towards a false point located on one of the surfaces of the airfoil, the length of the short rod being shorter than the distance between the surface of the mold and the surface of the blade at the false point, and the difference between the length and the distance being equal to tolerance in relation to positioning of the false point in event of deformation of the core.

Abstract: A mold for producing a part, such as a turbomachine blade model, by injecting wax into a cavity, the cavity including at least two cavity elements, each of which is supported in a cavity block. The two cavity blocks are mobile relative to one another between a closed position for injecting the wax and an open position for removing the part following the injection of the wax. The two cavity blocks are mobile in a horizontal plane.

Abstract: The invention relates to an injection mold for producing a model of a turbine engine blade, comprising a top surface that folds onto a bottom surface, both surfaces having long rods for supporting a core (2) for generating cooling cavities inside the blade, wherein said long rods of the bottom surface are to contact a first surface (12) of the airfoil at bearing points (A51 to A53), and said long rods of the top surface are to contact a second surface of said airfoil at clamping points.

Abstract: A tooling for injection-molding a part, the tooling including two cavity blocks each including a cavity formed therein of a shape corresponding to a shape of a part that is to be molded once the cavity blocks have been superposed, at least one of the cavity blocks including an ejection mechanism ejecting the molded part and including at least one ejector movable between a molding position and an ejection position. The ejector is guided to move between its two positions along a curved path, or a circular arc, of shape that corresponds to a shape of a portion of the mold part to be extracted from the cavity.

Abstract: A tool for manufacturing a casting core, for a turbomachine blade with a leading edge and a trailing edge, the core includes a thick part on the leading edge side and a thin part on the trailing edge side is disclosed. The tool includes first and second dies of the core that are moveable in a direction with respect to each other between a molding position and a demolding position, sub-components that are moveable relative to the dies, and mechanical ejectors that are provided on the first and second dies. The parts of the dies corresponding to the thin part of the core do not include a movable sub-component. The thin part of the core is demolded along the main direction of opening of the first and second dies.

Abstract: A process for manufacturing at least one single-crystal seed that can be used as a starter seed in the manufacture of a single-crystal high-pressure turbine nozzle, with at least one vane between two platforms, by metal casting, is disclosed. The process includes producing a wax pattern that includes a pattern for the nozzle, a pattern for the starter seed, and a pattern for a crude seed; forming a ceramic shell mold from the wax pattern; incorporating a starter seed into the mold; pouring metal into the mold; directionally solidifying the metal in the mold from the starter seed; and separating the crude seed from the nozzle. The starter seed and the crude seed each include a flat face for localizing the crystalline orientations. The crude seed has the same crystallographic structure as the nozzle.

Abstract: The present invention relates to a tool for manufacturing a casting core, for a turbomachine blade with a leading edge and a trailing edge, the core (10) comprising a thick part on the leading edge side and a thin part (10A1) on the trailing edge side, comprising first and second dies (530, 540) of the core that can move in a direction (F?1 and F?2 respectively) one with respect to the other between a molding position and a demolding position, where appropriate with sub-components that can move relative to the dies, wherein the parts of the dies corresponding to said thin part of the core do not include a movable sub-component, mechanical ejectors (570) being provided on one or other of the dies, in such a way that the thin part (10A1) of the core is demolded along the main direction of opening.

Abstract: The present invention relates to a process for manufacturing at least one single-crystal seed that can be used as a starter seed in the manufacture of a single-crystal high-pressure turbine nozzle, with at least one vane between two platforms, by metal casting, wherein: a wax pattern is produced which comprises: a first element forming the pattern for the nozzle, a second element forming the pattern for the starter seed, including a flat face for localizing the crystalline orientations, and at least a third element incorporating a pattern for the crude seed with a flat face for localizing the crystalline orientations; a ceramic shell mold is formed from said wax pattern and a starter seed, including said flat face for localizing the crystalline orientations, is incorporated into the mold; a metal is poured into the mold; the metal undergoes directional solidification in the mold from the starter seed, so that the crude seed obtained has the same crystallographic structure as the part; and the crude seed o