Abstract: Apparatus for the countergravity casting of molten metal by immersing of gas-permeable multi-piece mold in an underlying pot of molten metal includes a motor actuated plunger for pressing the pieces into sealing engagement with each other without the need for glue therebetween and for resisting destructive flexure of the mold incident to the application of casting vacuum thereto.

Abstract: An apparatus for lost-wax castings wherein metal is melted in a vacuum vessel, and wherein there are provided vacuum pumps for producing a higher degree of vacuum around the mold during the casting of the molten metal.

Abstract: Apparatus for the shaping of metal in a bottom-gated mold by the vacuum-induced countergravity casting method including an upstanding levee on the periphery of the drag and circumscribing the chamber-to-mold joint and/or the cope-to-drag joint for isolating such joint(s) when the mold is immersed in an underlying melt.

Abstract: Apparatus for the vacuum, countergravity casting of metal in shell molds including a gas-permeable shell mold secured to the mouth of a vacuum box by a plurality of threadable mounting sites atop the mold engaged by self-tapping threads on the ends of rotatable shafts reciprocably slidable through the ceiling of the vacuum box.The mounting sites may comprise upstanding lugs atop the mold.

Abstract: A casting apparatus having a casting chamber which may be sealingly closed is provided. The casting chamber is evacuated and then an inert gas or a reducing gas is introduced prior to the casting operation. A ladle for containing a one-shot molten metal is disposed on the casting chamber to be evacuated simultaneously with the evacuation of the casting chamber and then surrounded by an inert or reducing gas atmosphere during the casting operation.

Abstract: Apparatus for the vacuum countergravity casting of metal including an elastomeric sealing gasket substantially thermally insulated, conduction-wise, from the underlying melt's heat by the mold-forming material and shielded from the melt's radiant heat by a surrounding skirt depending from the vacuum box.

Abstract: Cold-hearth melt-spinning apparatus for adapted improved continuous casting of refractory and reactive alloys possesses (1) a cold crucible having a selectively grooved surface operative to reduce both melt "freezing" at the melt/crucible interface and input heating power requirements, and (2) a replaceable nozzle of a refractory material that is friction-fit in an aperture provided therefor in the crucible. The confronting nozzle/crucible walls define a thermally impeding interface which maintains the nozzle at a temperature sufficient to substantially eliminate melt "freezing" in and across the nozzle orifice. The melt is ejected as a molten jet from the crucible by pressure, rapidly quenched on a suitably configured spinning disk into either filaments or flakes, and passed to an environmentally protected processing compartment. Arc heating of the melt is provided by a water-cooled and selectively movable electrode.

Abstract: A fiber reinforced metal is made by introducing an array of fibers into a die, charging the die with molten metal by vacuum infiltration and then applying pressure by means of an inert gas to improve the penetration of the molten metal into the fiber array. Apparatus for producing a reinforced metal cylinder comprises a cylindrical former (2) onto which a composite fiber (3) of boron, silicon and carbon is wound. The former (2) forms an inner closure member for the die defining a cylindrical die cavity (8) with an outer die body (4). A central cavity (15) within the former (2) is for insertion of a heating element to facilitate the flow of metal through the cavity (8). The die cavity is evacuated via conduit (16) and molten metal is then drawn into the cavity via the passage (7). After charging the die with molten metal the conduit (16) is connected to a source of high pressure nitrogen.

Abstract: An arc furnace and investment casting apparatus includes a copper base with an integrally formed crucible having a passage therethrough. A vacuum chamber is positioned on the top of the copper crucible with a non-consumable cathode projecting into the chamber to effect melting of metal placed in the crucible. A vacuum chamber is also suspended beneath the crucible for support of a mold to receive molten metal flowing through the passage.

Abstract: An apparatus for rapid solidification casting of molten high temperature and/or reactive metallic alloys has a heat extraction crucible for containing the alloy in liquid form. A nozzle forms an integral part of the crucible and allows for ejection of a stream of molten metal. The heat extracting crucible and nozzle are protected from the molten alloy by a shell of the alloy which has solidified and prevents reaction between the molten metal and the heat extracting crucible.

Abstract: A method and device for the manufacture of metal bands, particularly of an amorphous metal alloy is provided. The liquid alloy is deposited on a cooling body having a rapidly moving surface, upon which solidification into a metal band occurs. Concurrent with the cooling body surface movement, the cooling body and the melt stream are moved relative to one another at right angles to the direction of the melt stream. This additional movement allows utilization of the entire cooling body surface and not merely that in the plane of the melt stream.

Abstract: Improvement in apparatus for making metal filament by depositing a stream of molten metal onto the inner surface of an annular chill roll as it is being rotated includes provision of a rotably mounted annular chill roll having an inner surface substantially parallel to its axis of rotation, and means for stripping the metal filament from the inner surface of the chill roll and for guiding the stripped metal filament away from the chill roll.

Abstract: The installation comprises a pressure tight casing with vacuum melting and casting chambers communicating with each other via a pressing chamber. The vacuum melting chamber accommodates an electrode holder arranged above a melting pot. Located under the melting pot is a pouring device with funnels, one of which is inserted into a hole in the shell of the pressing chamber. The vacuum melting chamber incorporates an appliance for cleaning the used funnels and a mechanism for moving the funnels. The pressing chamber communicates with the pressmould. One half of the pressmold is secured on an immovable vertical plate and the other half is mounted on a movable vertical plate. The movable vertical plate travels over horizontal guides.

Abstract: Metal alloy filaments having improved surface characteristics and enhanced mechanical properties are extracted from a source of molten metal alloy using a quenching wheel in a partial vacuum.

Abstract: The present method and apparatus for die casting of metals such as aluminum, is especially suitable for casting under vacuum. The casting is performed under such operating conditions that a contact between the molten metal being cast and the free atmosphere is avoided all the way from the melt to the casting proper. For this purpose, the present casting apparatus includes a closeable and evacuable transport container connected to the casting apparatus proper by a coupling which is also evacuable. The transport container is placed on a filling chamber and the evacuating apparatus is arranged to simultaneously evacuate the filling chamber, the transport container and the coupling between the transport container and the filling chamber proper. The evacuation takes place in a direction opposite to the flow direction of the metal being cast. If desired, further evacuating means may be provided for evacuation of the filling chamber and the die in the direction of the metal flow.

Abstract: Apparatus comprising a crucible, a level-determining tank, a vacuum pump, an injection cylinder, a mould and appropriate interconnecting pipes. Molten metal is kept under vacuum throughout except that in a modification a gas may be deliberately introduced into the mould to provide a surface treatment of the casting.

Abstract: A casting machine including a control circuit which automatically controls ts operation. The casting machine includes a casting chamber which supports an alloy filled open-ended container whose open end faces the sprue hole of an investment casting ring. The control circuit couples a vacuum to the casting chamber while maintaining the casting chamber in its initial upright position. After a first timing interval, the chamber is inverted and the vacuum is decoupled from the casting chamber, and compressed air is applied to the casting chamber. After a second subsequent time interval the casting chamber is automatically returned to its initial upright position, the action of which causes the casting chamber to be automatically vented to the atmosphere.

Abstract: A metal casting apparatus comprising an upright pressurizable housing open at its bottom adapted to receive an upright upwardly open container with a casting mold in a lower part of the container. A molten-metal receptacle is mounted in the container above the mold and undergoes tilting movement about a horizontal axis whereby the receptacle dispenses metal into the casting passage in a tilted position of the receptacle and receives molten metal in an upright position of the receptacle. Means is provided for hermetically sealing the bottom of the housing upon the insertion of the container therein with the receptacle in its upright position, while valve means is connected to the housing for evacuating and pressurizing it.

Abstract: A molding arrangement to produce a die cast of a complicated shape by using an air-evacuated, air-tight work chamber. The chamber has a crucible and a mold, and an inert gas is used. An arc is generated and the electric resistance of the inert gas is broken between a pair of electrodes provided in the chamber by oscillating a high frequency current from a high frequency oscillator circuit connected outside the chamber. The metal material is melted in the crucible by the arc, while supplying the inert gas and using discharging gas generated from the metal. When the metal is melted the injection of inert gas into the chamber is stopped, so as to make the chamber a vacuum. The furnace, which includes the chamber, is rotated and the melt in the crucible is transferred into the mold. The melt is then forced to reach every corner in the mold by the pressure of the inert gas which is injected again into the chamber.