Abstract: Placed in a box (1) is a ceramic shell (21) delimiting a casting space (22), the shell being surrounded by a mass of binder-free sand (23). The casting space is connected to a source (4) of liquid metal located underneath, in which are applied, in succession, a pressure (P1) bringing the liquid to the threshold of the casting space (22), a pressure (P2) slightly greater than that necessary for filling this space, and then a marked overpressure (P3); finally, the pressure is brought back down to the first value (P1). When the casting space has been filled, an underpressure is created in the space containing the mass of sand (23) in order to prevent any deformation of the shell (21) due to the overpressure (P3), at least until the formation of a metal skin against the shell and at most until the start of the reduction in the overpressure in the source (4) of liquid metal.

Abstract: A method of forming a composite profile including a hollow body with approximately parallel opposite walls and a covering sheet fixed against a first one of the walls includes heating a portion of the composite profile to form a temperature gradient. A hot forming projection is then pressed against a second one of the walls so as to bring the first wall into contact with the second wall at a formed region. At least one section of the profile is then pivoted about the formed region so as to produce a folding line.

Abstract: This process makes it possible to manufacture articles of any shape by stamping, in which articles the matrix of the alloy has to have a coarse-grained structure. According to the invention, a partial hot-forming operation is carried out by stamping a blank made of an oxide-dispersion-strengthened alloy, especially a nickel-based alloy, having an initial ultrafine-grained structure, in order to form a shaped component, this shaped component is subjected to a secondary recrystallization heat treatment so as to develop an abnormal grain growth, and then a new hot-forming operation is carried out by stamping in order to give the recrystallized shaped component the final shape of the article.

Abstract: An apparatus for dispensing a viscous material includes a removable tank 1 and a device 10 for storing and dispensing the material, whereby the viscous material may be dispensed while an empty tank has been removed for refilling. The apparatus is useful for dispensing a hot-melt material.

Abstract: The present invention relates to a plant and a process for the dispensing of a fluid product (4) held in a tank (3) and supplied to a nozzle (1) via a pipe (2). The product is pressurized by means of a pump (8) and of a cylinder (7) which is connected to a regulator (10) connected to the nozzle via an electronic card (17).

Abstract: A ladle (1) comprising a main portion (5), an outlet (3) and an inductor assembly (2) fitted onto the main portion. The main portion comprises a cavity (13) defined by a refractory lining, provided with at least one opening (21) and shaped so that no pockets of molten metal remain after pouring. Consequently, the metal flows more readily, and hot deslagging and metal temperature measurement are made easier. The ladle is useful for maintaining the temperature of high melting point metals such as steel or superalloys for processes requiring metal sampling.

Abstract: A device including a cavity defined by walls (17) having a feed opening (18) and an outlet (19) for the fluid material (m). The outlet (19) is connected to a nozzle (20). The device is suitable for measuring, controlling and depositing the material (m).

Abstract: A liquid metal casting conduit (1) is shaped as a partial torus and has an inductor (3) embedded in concrete and whose turns are asymmetrical with respect to the axes (XX') and (YY') of the conduit. It is used for to the homogenization of the metal temperature when the conduit is secured to a low pressure casting ladle (7).

Abstract: A device for preheating a metal casting channel (3). The device is positioned in a rapidly removable manner by a frame (1) consisting of a stationary portion (12) and a movable portion (26). The channel (3) comprises a refractory part (5) surrounded by an insulating coating (7), an inductor (8) and refractory concrete (10) within a shell (11). The preheating device includes the inductor (8) and an element (2) made of a refractory and electrically conductive material. Said device is useful for evenly and uniformly preheating a metal casting channel (3).

Abstract: A device for delivering through a pipe a mass of a selected gas close to a selected predetermined mass value m, to a system at a predetermined working pressure P0 substantially greater than 100 bars according to the present invention incorporates a vessel of known volume V0, fitted with an inlet valve and with an outlet valve that is operatively connected to control passage through the pipe. A volume of a selected gas is injected into the vessel until a pressure of the gas in the vessel reaches a predetermined initial high pressure P1 with the initial high pressure P1 being greater than the working pressure P0. A temperature T of the gas in the vessel and the pressure of the gas in the vessel are measured, and a calculated pressure P2 is calculated using a formula: ##EQU1## wherein the volume of the vessel is substantially greater than a volume of the mass m at the working pressure P0 and the initial high pressure P1 is greater than the working pressure P0.

Abstract: Process for the manufacture of a containment element for a fluid heated to a temperature exceeding 850.degree. C. A blank made of a refractory metal alloy is coated with a glass-based adhesive, at least one film made of a glass suitable for the material and the plasticity temperature of the blank is laid down on it, the blank is heated to the plastic temperature and subjected to a first stamping operation to shape the chamber of the containment element, followed by a second stamping operation to form the inner or outer flaps of the chamber. The element is then cooled, and finally, heat-treated.

Abstract: A heating assembly 1 for transferring liquid metal 28 has a closed cross-section and includes a refractory tube 4 wrapped in an insulating layer 5 which is in turn surrounded by an inductor 3 enclosed in refractory concrete within a metal shell, the insulating layer 5 consisting of an insulating refractory concrete layer 5a. The heating assembly 1 may be used in a liquid metal holding furnace 9 provided with a supply of pressurised gas Pr for producing metal parts.

Abstract: A jet of liquid metal 42 is directed onto a fast-moving receiving surface 4 and reciprocal relative motion is caused between the receiving surface 4 and the jet 42 perpendicularly to the moving direction.

Abstract: A fluid tight container 11 defines a conical internal cavity 35, and has an upper feed pipe 12 and a lower outlet opening 14. A cylindrical stirrer 15 is wholly enclosed in the cavity, and is driven in a circular oscillating manner by an external eccentric mechanism coupled to an extension of the stirrer. This arrangement makes it possible to mix products of high viscosity and gas without excessive heating and leakage, by virtue of the exclusive use of static fluid-tightness.

Abstract: A polishing machine comprising a frame 1, a mobile polishing head 2 mounted on the frame, an abrasion tool 10, and a reciprocating slide 7 for causing the tool to polish a contacted object. The tool is mounted on a tool holder 9 fitted with a pneumatic system 36, 38; 50 producing a dual adjustment of the bearing pressure generated by the tool 10 on the object P being polished.

Abstract: A polishing machine comprises a vertical frame 1, a workpiece-carrier plate which is horizontally movable in at least one direction, and a support column 3 vertically movable in relation to the frame and supporting a polishing unit comprising a tool holder 9 carried by a slide 41 driven in translational motion by an eccentric device operated by an electric motor 8. The tool holder thus undergoes an alternating translational or reciprocating motion, and a hydraulic jack 50 is provided to urge the tool holder against the workpiece being polished. The structure for imparting the alternating translational motion is formed by an internal connecting rod-crank assembly 34, 46 mounted in the slide 41.

Abstract: Liquid from a supply tank B flows into a container C via outer and central annular chambers 14, 8 of filling apparatus A. Communication between the chambers is controlled by a flexible diaphragm 5 selectively urged against an annular seat 15 on a wall 10 separating the chambers in response to air pressure supplied to a chamber 23 on an opposite side of the diaphragm.

Abstract: A filling apparatus operating by counterpressure and intended for use on bottling or filling machines for a barrel 1 equipped with an electric sensor 2 for controlling the fill level of the containers, and connected to a solenoid valve E and supply tank B filled with liquid under gaseous pressure, as well as to a detector P that senses the proximity of the container C to be filled. Barrel 1 of filling apparatus A contains a chamber 11 which, when no container C is being applied against the filling apparatus, is divided by two flexible membranes 5, 6-72 into three successive annular chambers 69, 70, 71 separated by the dividing walls 58, 62-621 of the two membranes 5, 6-72.