Abstract: Method and apparatus for prolonging the stability (working life) of a ceramic slurry and other aqueous mixture or dispersion containing a liquid silica-bearing or other component as well as the raw liquid silica-bearing component in ambient air over time by providing a gas blanket that reduces exposure to ambient air.

Abstract: Various systems and apparatuses for processing a metal casting are provided.

Abstract: A numbering device is disclosed for marking molded cast parts, the device including a plurality of concentric cylinders having indicia disposed on an end thereof, the cylinders being rotatingly indexable to cause the indicia to move as desired to form the desired mark, the mark is then impressed into a sand mold and subsequently reproduced on the cast part.

Abstract: A diecast machine comprises: a sleeve extending in the vertical direction; a plunger moving upward in the vertical direction inside the sleeve; a mold disposed above an upper side of the sleeve; a case member constituted of a nonconductive member, which covers at least a lower end of the sleeve and forms a closed space including the lower end of the sleeve; a communicating pipe connecting the inside of the closed space to the outside of the closed space; and high-frequency induction coil configured to heat metal material disposed on the plunger from the outside of the case member and melt the metal material.

Abstract: To destructively remove a refractory metal casting core from a cast part the part is exposed to a combination of nitric acid and sulfuric acid.

Abstract: The invention provides die casting systems and methods. A die casting system has two body portions, each having a die insert. A die-insert rack that holds the die inserts thereon and is used for positioning the die inserts between the two body portions is also provided. The rack includes a die-insert-ejection system for pushing the die inserts into the respective body portions. Each body portion may include a plurality of cooling inserts connected in parallel between inlet and outlet channels of a corresponding body portion. One body portion may include a plurality of alignment blocks protruding therefrom, while the other body portion may have a plurality of recesses for respectively receiving the alignment blocks. Each recess may have adjustable sidewalls for adjusting alignment between the body portions.

Abstract: The present invention concerns an element for the casting of a liquid metal, comprising a base body made from a refractory material, said body comprising an outer surface and an inner surface defining a pouring channel for the casting of the liquid metal. This element is characterized in that at least a part of the element inner surface is coated with an insulating coating forming, at the metal liquid contact, a gas impermeable layer. Such an element has an excellent thermal shock resistance which permits its use without preheating. Then a layer reducing advantageously the gas permeability is formed.

Abstract: According to the prior art, through-holes in components are often introduced after the production (casting) of the component. This entails additional outlay in terms of time and equipment. The time required can be considerably shortened if a casting mold is designed in such a way that the through-hole is at least in part formed by corresponding projections being formed on the inner wall and/or the outer wall of the casting mold.

Abstract: A metal flow system, for use in casting aluminium alloy using a pressure casting machine, is provided by a component of a die or mould assembly, for the machine, which defines a die cavity. The component defines at least part of an alloy flow path for the flow of aluminium alloy from a pressurized source of substantially molten aluminium alloy of the machine to the die cavity. The flow path includes at least one runner and a controlled expansion port, referred to also as a CEP, which has an inlet through which the CEP is able to receive aluminium alloy from the runner and an outlet through which aluminium alloy is able to flow from the CEP for filling the die cavity.

Abstract: A ceramic core for use in casting an article such as for example an airfoil, wherein the ceramic core has a pocket located at or near a region of the core that is otherwise associated with occurrence of a localized casting defect in the cast article. A covering is disposed on the core to cover the pocket and provide core outer surface features.

Abstract: Pre-molding of wax or similar sacrificial material over one or more cores facilitates a subsequent molding over a core assembly. Individual cores or groups thereof may be pre-molded in a wax body. One or more such wax bodies may be assembled with other bodies and/or other cores to facilitate a main wax molding of such assembly.

Abstract: A process for the casting of metals includes the steps of providing a mold, delivering a molten metal into the mold, solidifying the molten metal, and removing at least a portion of the mold. The step of removing at least a portion of the mold begins before the step of solidifying the molten metal has been finished. An apparatus to deliver a solvent to a mold is also provided.

Abstract: A temperature regulation device for the strip (3) produced in a continuous casting plant with ingot mold (16) comprising a pair of cooled, parallel, counter-rotating rolls (2, 2?), closed by two plates at the axial ends of the rolls, includes a pair of substantially rectangular panels (5) placed symmetrically under the plane of the rolls axis, with its longest dimension substantially parallel to the axis of the rolls. Ducts (6, 8, 8?) are provided which feed a series of jets (7) to spray cooling gas onto the strip surface (3).

Abstract: An automated matchplate molding machine includes a cope flask, a pattern plate and a drag flask for creating formed sand molds. A lock is provided to lock the drag flask to the platen table of the molding machine during desired stages of an individual sand molding sequence. The lock between the drag flask and the platen table may include actuated pins which engage corresponding detent structures such as tapered holes integral with the drag flask and prevent lateral migration of the drag flask relative to the platen table. Additionally, cope flask actuators are provided which vertically support and are operable to raise the cope flask relative to the squeeze head to facilitate release the cope mold from the cope flask.

Abstract: A substrate is coated by applying an essentially pure aluminum first layer to a surface of the substrate. At least a first portion of the first layer is oxidized so as to provide a protective coating of desired properties. The substrate may be a refractory metal-based investment casting core.

Abstract: A substrate is coated by applying a first layer atop the substrate and comprising, in major weight part, a non-refractory first metal. A second layer is applied atop the first layer and comprises, in major weight part, a carbide and/or nitride of a second metal. A third layer is applied atop the second layer and comprises, in major weight part, a ceramic. The substrate may be a refractory metal-based investment casting core.

Abstract: The invention concerns a continuous casting ingot mold equipped with an immersed nozzle (3) provided with lateral outlets (2) opposite the small sides (5) of the ingot mold, and whereof the pattern of molten metal flows can be naturally in single loop or double loop, or even unstable. The invention is characterized in that it consists in using sliding magnetic fields acting, at the nozzle, on the flows of liquid metal reaching the ingot mold through the nozzle orifices, said magnetic fields being generated by polyphase linear electromagnetic field windings (14, 14?, 15, 15?) arranged opposite at least one side of the ingot mold on either side of the nozzle, preferably opposite one large side and advantageously both, so as to set, or stabilizes, a permanent pattern in double loop mode.

Abstract: A mold for the casting of metals including an aggregate comprising a refractory particulate material and a soluble binder which provides for minimal heat transfer between the mold and the molten metal during filling. The aggregate preferably includes at least a proportion of particulate material having a heat diffusivity at least as low as silica sand to reduce the chilling effect of the mold. The mold is removed from the casting the action of a solvent, which simultaneously cools and solidifies the casting at a maximum rate. Processes for forming the mold and the casting of metals using the mold are also disclosed.

Abstract: In a metal molding machine provided having a tilt to a clamping device with an injection unit which is constituted by a liquid metallic material reservoir in which a cylinder having a nozzle portion at the tip portion equipped with a heating device at the outer periphery and an injection plunger having advance or retreat freely in the inside, and the injection cylinder at the rear portion, the metallic material feeding to the above liquid metallic material reservoir is performed in liquid by melt to the temperature of above the liquidus temperature in a melting cylinder standing the liquid metallic material reservoir to liquid metallic material surface from a feeding pipe having a smaller diameter than the inner diameter of the cylinder. The melting and feeding of metallic material is performed at an atmosphere of an inert gas such as argon.

Abstract: A method and strand guide for supporting, guiding and cooling casting strands (1) made of steel, especially preliminary sections (2) for girders, which are cooled by injected water (29) and are drawn, serve to prevent cracks, especially surface cracks, from appearing in the microstructure by adapting the cooling conditions of the surface of the strand in the region of the secondary cooling, and serve to prevent undercooling of the strand shell, wherein in order to avoid an undesirable solidification structure on the upper flange edges or in other cross-sectional areas, the cooling and support of the beam blank format are so adapted to the solidification range that cooling and support are provided exclusively where a crater is formed.