Abstract: A core for the moulding of a turbine engine blade, this blade including a vane extending along a spanwise direction and ending in a top, this core including a first core element to delimit a first internal cavity and a second core element of which at least one portion delimits a second internal cavity. The second cavity is situated between the first cavity and the top of the blade along the spanwise direction, and the portion of the second core element delimiting the second cavity includes a through hole, which emerges in line with an end face of the first core element to constitute a de-dusting conduit of the first cavity, this conduit traversing the second cavity from end to end while emerging in the top of the blade.

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 brazing system for brazing component members of a workpiece has a brazing chamber an inside of which is made a heating space of a volume corresponding to the workpiece, a radiant heating means provided with a plurality of heating sources which are positioned so as to correspond to a plurality of regions into which two facing surfaces of the workpiece are respectively divided, a convection heating means for circulating a heated inert gas to the heating space so as to heat the workpiece, and a control means for controlling the operation of the heating sources and the circulation of the inert gas. Each heating source is independently controlled by the control means, and the convection heating means circulates the inert gas so as to reduce a temperature difference of the workpiece caused by the heating sources.

Abstract: The present invention relates to a hybrid lay-up tool comprising a thin metallic working surface and a composite back structure. The working surface may be an Invar working surface, and the working surface and the back structure may be coupled using a self-locking connection mechanism. The present invention also relates to a method for providing a hybrid lay-up tool. The method may include providing a metallic face sheet, providing a composite back structure, and operably coupling the metallic face sheet with the composite back structure using a self-locking connection mechanism.

Abstract: An apparatus for inserting a part (6) into a foundry core (1) that is to be completed to a core assembly between two core shooting stations (2) is designed and constructed for a fully automatic handling of the part (6) such as to include a magazine (7) for making available the part (6), a manipulator (8) for receiving the part from magazine (7) and delivering the part (6) to the foundry core (1), and a transfer device (9) for moving the manipulator (8) between the magazine (7) and the foundry core (1).

Abstract: A core assembly is formed by molding a destructible plastic form in abutting relation to a rigid bonded core. The core assembly can be used for casting large or long and thin castings. The rigid bonded core reinforces the plastic form against flexural and torsional forces as well as forces within the plastic tending to change the dimensional configuration of the plastic form.

Abstract: An entirely automatic, cold box type machine for molding an integral connecting core, which machine is provided with a sand blowing mechanism and a gassing mechanism, these mechanisms being suspended above an upper frame of the molding machine and traversable, and with a liftable drag car being mounted on the platform of the molding machine, characterized in that a rotatable connecting core feeding device is provided at one side portion outside the molding machine, a reversing unloader is provided at the other side portion, and a connecting core transfer car having a connecting core lifting device is traversably suspended from the upper frame in parallel with the sand blowing mechanism and the gassing mechanism.

Abstract: A method of producing a pattern for use in the manufacture of a mold which is adapted to be cured by microwave irradiation. The method comprises forming a rolled-over male pattern, forming a rolled-over female pattern having a scale-off layer along a boundary thereof with the male pattern, removing the scale-off layer, pouring a silicone RTV rubber into a cavity of the female pattern to form a match plate therein, setting a metallic frame on the match plate, filling the interior of the metallic frame with a mixture of microwave-pervious resin and dry silica sand, causing the mixture to be thermally cured thereby forming a reinforcing layer on the peripheral surface of the match plate, placing the male pattern within the reinforcing layer after removing the match plate therefrom, and injecting a microwave-pervious silicone rubber into the gap formed between the reinforcing layer and the male pattern thereby forming a mold defining layer on the inner surface of the reinforcing layer.

Abstract: A uniform reticulated intrastructure (56) is placed in a container (58) and surrounded by beryllium powder (72). After closing the container (58) and applying heat and pressure, a hardened form is taken out of the container. The intrastructure (56) is then removed leaving a lightweight solid beryllium body (72) suitable for use as a mirror (52). Means (62, 66) are provided to control the spacing of the intrastructure elements during the forming process.

Abstract: Disclosed is a method and apparatus for fabricating thermoplastic patterns for investment casting. The patterns define hollow objects and have contained within a very precisely located ceramic core. Thermoplastic is injected into the pattern die on either side of the core, thereby avoiding distortion, movement or breakage of the core. Multiple sprues are used; the sprues are individually fed from a nozzle having a single central bore. The configuration of the nozzle tip and the cavity from which the sprues emanate is such that a gate or bridge is not formed at the entrance to the die assembly. Accordingly, removal of the pattern from the die may be effected by pulling the part coaxially with the sprues, thereby avoiding the necessity of splitting the die where the sprues are located.