Abstract: Provided is a twin-roll casting machine capable of suppressing irregularities in crosswise thickness distribution of a strip. The twin-roll casting machine comprises chilled rolls, side weirs, and nozzle pieces. A plurality of openings for supply of molten metal to between the chilled rolls are formed alternately on portions of each of the nozzle pieces adjacent to the one and the other rolls, respectively, and are spaced apart from each other axially of the rolls.

Abstract: A casting system for pouring nonferrous metal molten masses, in particular copper or copper alloys, has a tundish and a submerged pipe feeding into a molten bath inside a thin-slab mold. Trouble-free discharge of the melt into the mold and degassing at the exposed surface of the mold is ensured. The submerged pipe leading from the tundish along a pre-defined pouring angle has first and second sections. The latter is a tip nozzle that submerses into the molten bath. It has at its wall facing the mold bottom one or more discharge openings effecting a change in the flow direction of the molten mass. A lip at the tip nozzle is spaced so as to overlap the discharge opening, to cause a second flow direction change and lateral distribution. The discharge opening and the lip are disposed inside the mold bath, below a bath surface, during operation.

Abstract: A magnesium-alloy plate manufactured by completely melting a magnesium-alloy material received in a hermetic type melting furnace; transferring the molten magnesium-alloy into a hermetic type heat insulation furnace through a hermetic type transfer runner; discharging the molten magnesium-alloy received in the heat insulation furnace into a recessed portion of a casting wheel through a casting runner, to which a mixed gas containing SF6 is injected by ignition-suppression gas injection tubes; and continuously casting the molten magnesium-alloy entered into the recessed portion of the casting wheel into a magnesium-alloy plate using a casting band circulating around the casting wheel while coming into contact with an upper portion of the recessed portion.

Abstract: A continuous extrusion machine has a chassis (1) supporting a wheel (2) for rotation by a motor. An endless groove (7) extends around the periphery of the wheel (2). A shoe (3) is mounted in the chassis (1) and has an enveloping surface shaped to closely envelop an arc of the wheel (2) periphery so that the groove (7) co-operates with the shoe (3) to form a passage. An abutment is mounted on the shoe (3) to extend into the passage at a downstream end. Tooling is mounted in the shoe (3) including a die such that a material such as aluminium or copper bar fed into the groove (7) is extruded through the die as a consequence of the energy transfer via friction from the rotating wheel (2). A gap (12) exists between the enveloping surface and the wheel (2). The gap (12) is used to provide the orifice of a sonic gap (12) sensor whereby the size of the gap (12) can be accurately and directly measured.

Abstract: A method and apparatus are provided for rapid production of high-strength metal structures. A computerized model of the structure is created, then the model is sliced into horizontal layers. A computer-controlled gantry controls the location of a roller in at least three axes (x, y, and z), the roller depending from the gantry. An electron or laser beam melts the end of a metal wire, forming a puddle of molten metal near the roller. Coordinates defining each layer of the model of the component are sent to the gantry, which moves the roller over the puddle to create a uniform-thickness layer, the wire feeding additional metal to be melted by the beam as the gantry moves. The puddle is narrow, typically requiring multiple narrow strips to be laid adjacent each other to form a complete layer. When a layer is completed, additional layers are formed on the first layer, and this process repeats until the structure is completed.

Abstract: Process and apparatus for continuous casting of metal strip in which a layer of liquid parting agent, and any solid detritus contained therein, is completely removed from a casting surface of a rotating belt after contact with the metal, and in which a new layer of liquid parting agent is applied to the casting surface thereafter and prior to renewed contact with the molten metal. The removal of used parting agent and the application of fresh helps to present the formation of surface blemishes and defects on the cast metal strip product. Such blemishes and defects can also be minimized by using an injector having a flexible tip used to inject the molten metal onto the casting surface and preferably one or more spacers to create a gap between the tip and the casting surface itself. The spacer is preferably a screen of wire strands orientated to minimize disruption of the new layer of liquid parting agent applied to the casting surface.

Abstract: Apparatus for continuously casting strip material comprising a casting drum rotatable about a first axis, a pair of cheek members including portions slidably engageable with sides of the casting drum mounted for rotation about a second axis spaced from said first axis and a casting belt wrapped around a portion of the cheek members together defining a converging casting arc. The cheek members include peripheral surfaces engageable by marginal edges of the casting belt which maintain a variable casting gap between a casting surface on the belt and a casting surface on the drum. The eccentric mounting of the cheek members with respect to the casting drum cause the spacing between the belt and the drum to decrease as the end of the casting arc is reached. The cheek members each include tapered side surfaces which together with the casting drum define ear receiving recesses that increase in a radial direction as the end of the casting arc is approached.

Abstract: In a casting nozzle, tubes are placed between a bar-shaped mouthpiece and a distribution bar, which connect holes in the mouthpiece and the distribution bar to allow for the flow of the melt. Pulling rods which are under tension, are anchored to the mouthpiece and to the distribution bar and press these parts elastically against the ends of the tubes in such a manner that the nozzle components are elastically braced, yet remain flexible and can adjust freely to heat dilatations or inaccuracies which occur in fabrication or assembly. The nozzle components, particularly the tubes, are easy to obtain and to exchange. Due to the fact that the pulling rods enter the mouthpiece from its back side and are anchored therein, the mouthpiece can be very slender, thus allowing for thin casting.

Abstract: A refractory channel connection apparatus transfers molten metal from a metallurgical vessel into a mold of a continuous casting machine formed by a peripheral groove and a casting wheel and a band covering the open side of the groove. The channel connection apparatus includes a refractory pouring tube having an inlet end connected to the discharge nozzle of the metallurgical vessel, an outlet end and a molten metal passage extending from the inlet end to the outlet end. A refractory nozzle extension is provided at the outlet end of the pouring tube, the nozzle extension having therethrough a flow through passage communicating with the passage of the pouring tube, an outer profile dimensioned to extend tangentially into the mold and to define therewith a gas seal slot, and a lower end extending into the mold to a level above the upper level of metal cast therein.

Abstract: Disclosed are method of and apparatus for continuously casting a compound metal bar, the bar comprising a core member encased in a clad member which in combination form a unitary metal matrix. Said compound metal bar is cast by continuously pouring a first molten metal into a casting mold and discharging a second molten metal beneath the surface of the first molten metal beneath the surface of the first molten metal and continuously solidifying both molten metals to form said compound metal bar.

Abstract: Disclosed is an apparatus and method for automatically centering a metering pin in the pouring spout of a molten metal pouring pot.

Abstract: The invention provides an apparatus and method for continuously casting a filament, such as a glassy metal filament, at high speed within a zone of preselected vacuum. A continuous extrusion mechanism and a rapidly moving quench surface are located within a casting module. A vacuum mechanism provides the preselected vacuum in the module as the filament is cast, and a transport mechanism continuously moves the resultant rapidly advancing filament across the boundary between the vacuum in the casting airlock mechanism substantially preserves the module vacuum as the cast filament is transported across the boundary and a passivator mechanism passivates the quench surface to prevent the filament from adhering thereto.

Abstract: A continuous steel casting apparatus includes a casting nozzle, a mold surrounding the casting nozzle and having moving mold walls together defining a rectangular casting cross section and being formed of oppositely located, parallel-extending endless casting belts and oppositely located, parallel-extending endless lateral dams. A sealing assembly provides a seal between the casting nozzle and the mold walls. The sealing assembly includes sealing levers situated between the casting nozzle and the casting belts. The sealing levers are movably mounted on the casting nozzle. Each sealing lever has a sealing face oriented towards a respective casting belt and extending parallel to the width thereof. Further, each sealing lever is resiliently urged into a sealing engagement with the casting belts. Side surfaces of the sealing levers sealingly engage the dams.

Abstract: A continuous flexible metal band surrounding a molding wheel and rotating therewith engages the wheel through an arc less than 180.degree., e.g. 110.degree., and is maintained with a substantial inward radius of curvature throughout its entire length. This permits the employment of bands with cavities therein and having thicknesses several times greater than 0.001 times the diameter of the molding wheel without fatigue and failure of the band.

Abstract: A continuous casting machine in which a groove in the periphery of a wheel closed by a strip forms the mould and a tundish feeds the mould through a spout extending from a first region of the tundish supply vessel proper, the spout making sealing engagement with the wheel, the tundish being supported for movement about a horizontal axis to one side of which the first region lies and to the other side of which lies a second region of the vessel to which a counterweight is applied, and in which region means for applying a vertical force to the tundish are located.

Abstract: A pouring pot for pouring molten metal into a casting mold of a continuous casting apparatus comprises upper and lower pot sections with the upper pot section having a volume sufficiently larger than the effective volume of the lower pot section so as to maintain the molten metal pressure depth and therefore the pressure head substantially constant despite fluctuations in the total amount of molten metal in the pouring pot to thereby effect discharging of the molten metal at a substantially constant flow rate. The upper pot section has a volume at least 20% greater and preferably 20%-40% greater than the effective volume of the lower pot section. The overall volume of the pouring pot is similar to that of conventional low volume pots now in use so that conventional supporting equipment can be used to support the pouring pot.

Abstract: A method and apparatus for of starting the continuous casting of a first metal in the mold of a continuous casting machine, in which a molten second metal having a melting point lower than that of the first metal is first introduced into the mold of the casting machine at a temperature substantially below the melting point of the first metal and in which the introduction of the second metal is discontinued and the casting of the first metal is begun after cooling of the mold has caused the second metal to form a solidified plug within the mold and while the cooling of the mold continues. The apparatus includes means for the sequential casting of the second and first metals in a casting machine while the casting machine is being cooled and the method allows metals of very high melting point, such as steel, to be continuously cast without damaging the mold or creating undue danger to the operator.