Abstract: A porous metal foam body obtainable by applying one or more layers of molten metal to an open-pore non-metallic substrate and allowing the molten metal to penetrate into the open pores of said non-metallic substrate to form a metal foam body whose metal component has at least partially penetrated into said open-pore non-metallic substrate. Said open-pore metal foam body is prepared by a process in which an open-pore non-metallic substrate is provided and coated with a molten metal, and the molten metal penetrates into the open pores of the open-pore non-metallic substrate. The metal foam bodies can be employed in many fields of technology.

Abstract: Motor vehicle pipeline comprising a metal tube with an aluminum layer is applied to the outer surface of the metal tube. An aluminum oxide layer is present on the outer surface of the aluminum layer. The aluminum oxide layer forms the outer layer of the motor vehicle pipeline. A method of making the motor vehicle pipeline is disclosed.

Abstract: A method for diffusing titanium and nitride into a base material having a coating thereon using conventional surface treatments or coatings. The method generally includes the steps of providing a base material having a coating thereon; providing a salt bath which includes sodium dioxide and a salt selected from the group consisting of sodium cyanate and potassium cyanate; dispersing metallic titanium formed by electrolysis of a titanium compound in the bath; heating the salt bath to a temperature ranging from about 430° C. to about 670° C.; and soaking the base material in the salt bath for a time of from about 10 minutes to about 24 hours. In accordance with another aspect of the present invention, titanium and nitride may be diffused into a base material without a coating. The treated base material may further be treated with conventional surface treatments or coatings.

Abstract: The inventions refer to method of product surface treatment, technological line and device for hot applying the coating on lengthy products. Line for applying the coating on lengthy product comprising supplying device, product surface preparing unit, devise for continuous applying the coating, cooling camera and final product acceptance unit. Device for applying the coating comprises camera (13) for applying the coating, fixed above the tank (14) with melt. In cover (16) of camera (13) there is an outlet 19 for creating pressure discharge, and in cover (21) of tank (14) there is an inlet (22). Camera (13) is provided with intake vertical passage (20) plunged into the melt of the tank. In the walls of camera (13) there are passages (23) and (24) for product (2) transporting. In working state the melt in the tank (14) and in the camera (13) occupies levels (25) and (26) correspondingly.

Abstract: A molten metal submergence device includes a submergence chamber, an inlet pipe, and a vortex breaker. The submergence chamber is defined by a side wall and includes an inlet in communication with an associated molten metal bath and an outlet in communication with the associated molten metal bath. The inlet is positioned in relation to the side wall such that material passing through the inlet is introduced at least substantially tangentially to the side wall. The inlet pipe is in communication with the inlet of the submergence chamber. The inlet pipe is configured to depend from a wall of the submergence chamber within the confines of the side wall. The vortex breaker is disposed in the submergence chamber between the inlet and the outlet.

Abstract: A method of producing a metal-graphite foam composite, and particularly, the utilization thereof in connection with a cooling apparatus. Also provided is a cooling apparatus, such as a liquid cooler or alternatively, a heat sink for electronic heat-generating components, which employ the metal-graphite foam composite.

Abstract: A method for depositing a copper seed layer onto a semiconductor substrate comprises applying a SCuD plating bath onto a surface of a substrate, rinsing the surface with an organic solvent, applying a co-reactant bath to the surface, and again rinsing the surface with an organic solvent. The SCuD plating bath is non-aqueous and comprises a copper precursor that is dissolved into an organic solvent. The co-reactant bath is also non-aqueous and comprises a co-reactant dissolved into an organic solvent. The SCuD plating bath may be heated before being applied to the substrate surface.

Abstract: A process of converting an outer layer of an object made of a refractory metal, such as titanium, into a carbide of the refractory metal. A molten metal, such as molten lithium, is placed adjacent the outer surface of the object. The lithium does not react with the titanium, nor is it soluble within the titanium to any significant extent at the temperatures involved. The molten lithium contains elemental carbon, that is, free carbon atoms. At high temperature, the carbon diffuses into the titanium, and reacts with titanium atoms to form titanium carbide in an outer layer. Significantly, no other atoms are present, such as hydrogen or oxygen, which can cause problems, because they are blocked by the molten lithium.

Abstract: To produce a structural element that withstands corrosive and/or abrasive flows of hot gas during a predetermined service life and, on the other hand, can be advantageously produced, it is proposed that the structural element comprises a fiber-ceramic main body, in that the main body is formed by a C/C shaped body having a fiber-ceramic structure converted with Si to C/C—SiC in a volume region bordering on an upper side of the main body, and in that a coating comprising a metal is applied to at least a partial region of the upper side of the main body.

Abstract: Process for applying integrated pretreatment layers to metallic surfaces, particularly the surfaces of coil metals, by treatment with a composition comprising at least one binder, crosslinker, a finely divided inorganic filler, and compounds containing at least two thioamide groups or containing one thioamide group and at least one functional group. Integrated pretreatment layer obtainable by the process.

Abstract: The invention relates to a method for manufacturing a hot-dip plated metal strip comprising the steps of: introducing a metal strip into a molten metal bath of plating metal to adhere the molten metal onto the surface of the metal strip; taking out the metal strip, after turning the running direction of the metal strip, from the molten metal bath without applying external force from outside the surface of the metal strip; adjusting the plating weight of the molten metal adhered onto the metal strip; and controlling the shape of the metal strip using magnetic force in non-contact state directly before or after the step of adjusting the coating weight. The invention prevents adhesion of dross to the metal strip without degrading the productivity, and thus manufactures a high quality hot-dip plated metal strip.

Abstract: This invention relates to a method for forming on a metal substrate a surface treating film excelling in corrosion resistance and stability of film-forming agent, by applying a film-forming agent by a multistage electrification system comprising at least two stages.

Abstract: The insulating layer formation step of forming an insulating layer 24-1 on a base for resin application 20 by applying polymeric material, which has been diluted with a solvent, filled with inorganic filler to the base for resin application and by drying the base for resin application; the circuit formation portion forming step of creating a circuit formation portion and a via hole 25 in insulating layer 24-1 that has been formed in the above described insulating layer formation step by means of a laser treatment; and the circuit formation step of forming a circuit 23-1 by plating the circuit formation portion and via hole 25 that have been created in the above described circuit formation portion forming step are provided and the insulating layer formation step, the circuit formation portion forming step and the circuit formation step are repeated a plurality of times in this order and, thereby, a circuit formation part (multi-layered substrate) is manufactured.

Abstract: A superabrasive particle coated with a solidified coating of a molten braze alloy that is chemically bonded to the superabrasive particle is disclosed and described. In one aspect, the reactive metal alloy may be chemically bonded to at least about 80% of an outer surface of the superabrasive particle. Various methods for making and using such a coated superabrasive particle are additionally disclosed and described.

Abstract: A method of coating of steel products such as plate and sheet using an aluminum-zinc coating alloy includes modifying the coating bath with a particulate compound constituent in effective amounts to control the spangle facet size of the coated product, improve tension bend rust stain performance, and improve coated product paintability. Constituents include borides such as titanium boride and aluminum borides, carbides such as titanium carbide, and aluminides such as titanium aluminide. The method produces a coated steel product that does not require temper rolling for painting.

Abstract: A salt mixture used for chemical strengthening of data recording disks is subjected to sub-micron filtration prior to use to remove certain impurities. Preferably, glass disks are chemically strengthened by ion exchange in a bath of molten sodium nitrate and potassium nitrate. A salt fresh mixture is prepared by starting with high-grade bulk salt in the intended proportions, melting the salt, and filtering the salt in a stainless steel filter, which is preferably approximately 2 micron or smaller. Filtration removes trace amounts of certain contaminants. The salt mixture thus prepared is then used for chemical strengthening of disks in the conventional manner.

Abstract: A method for obtaining a ferrous alloy part that supports a very high seizure load with very low dispersion includes steps of covering the part with an iron sulphide coating having an appropriate thickness and Fe/S ratio, where the coating is selected from among those with surfaces having a fractal dimension that is at least equal to 2.6.

Abstract: Collecting rods are pre-greased for use with a rotorod sampler. Multiple collecting rods are molded in one piece with a header to form a group. The collecting rods are attached to the header by thin gates so that they can be easily broken off for use. Multiple groups are combined into an assembly that is adhered to a container lid and dipped into a pre-greasing suspension to pre-grease the collecting rods. The container lid is attached to the rest of the container to enclose the pre-greased collecting rods for shipment.

Abstract: A hardenable steel workpiece having two regions is first hardened so that both regions are of generally the same low ductility. Then only one of the regions is hot coated so as to increase the ductility of the one region while not heating and changing the ductility of the other region. The workpiece can be hardened by hot working or tempering. The hot coating can be done by dipping the one region in molten zinc.

Abstract: The invention relates to a layered structure comprising a plastic substrate, at least one intermediate metallic layer on top of this plastic substrate and a metal or metal alloy layer on top of this intermediate metallic layer. The metal or metal alloy layer is applied from the melt of a metal or metal alloy. The invention further relates to a method of manufacturing such a layered structure.

Abstract: Disclosed is an alloy coating which can be advantageously applied to members for high temperature apparatuses so as to prolong the service life of the members. The alloy coating comprises an alloy. This alloy comprises: at least one member, as a base, selected from the group consisting of Re, Ir, Nb, Ta, Mo, and W; and at least one alloying element for imparting corrosion resistance. A method for forming the alloy coating, and a member for high temperature apparatuses, to which the alloy coating has been applied, are also disclosed.

Abstract: A method for making a field emission cold cathode for use in vacuum tubes. A carbon velvet material is coated with a low work function cesiated salt and bonded to a cathode surface. Alternatively, the carbon velvet material is bonded to the cathode surface before being coated with the cesiated salt. The coating may be applied by spraying the carbon velvet material with a cesiated salt solution, or by dipping the material into a crucible of molten cesiated salt. This abstract is provided to comply with the rules requiring an abstract, and is intended to allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning the claims.

Abstract: The invention concerns a method and a device for coating the surface of elongated metal products (1) in particular strips or wires, by applying a metal coating material (2), the product (1) requiring to be coated being continuously passed through a bath (3) containing a molten liquid coating material (2). The invention aims at enhancing the productivity of such a coating device. Therefor, the inventive method consists in: a) measuring the thickness (dIst) of the coating material layer (2) applied on the product (1) after it has passed in the bath (3); b) comparing the measured thickness (dIst) with a predefined value of the layer thickness (dsoll) and in determining the difference (&Dgr;) between the two values: and, c) influencing or modifying at least one parameter (P) of the coating process on the basis of the determined difference (&Dgr;) so as to be closer to the measured value (dIst) of the predefined value (dsoll).

Abstract: In a process of hot dip coating of metal strips, in particular, of a hot rolled steel strip, in which the metal strip is transformed into a continuous strip in an unwinding station with an adjoining welding machine, and then the continuous strip is subjected to a downstream modifying process including primary and secondary prickling and, in the final treatment step; in the hot dip coating section, guiding the continuous strip through a melt bath, a variable coating process with reduced costs becomes possible when the continuous strip, in a first treatment step, is directly transported into a pickling installation. In a suitable installation for effecting the process, the primary pickling installation is located in the entry section which is separated from the hot dip coating section by an entry accumulator.

Abstract: A steel composition, in which, Si content is regulated to a given range and Nb and Cu or Ni, Mo are compositively added, and a recrystallization annealing is carried out to form an internal oxide layer just beneath a surface of a steel sheet and a surface oxide simultaneously formed on the surface of the steel sheet is removed by pickling. As a result, the formation of oxides of Si, Mn and the like is considerably decreased on the surface of the steel sheet in a subsequent heating before plating because the above internal oxide layer acts as a diffusion barrier. Thus, there can be obtained high tensile strength hot-dipped steel sheets having a considerably excellent plating property.

Abstract: A production method for an aluminum alloy coated steel sheet. The aluminum alloy coated steel sheet is improved in appearance, corrosion resistance and workability resulting from dipping a base steel sheet into an aluminum alloy coating bath with a Si content of 7 to 15 parts by weight, a Cr content of 0.5 to 1.5 parts by weight and a Mg content of 0.46 to 3.0 parts by weight. Because of excellent workability, peeling of a coating layer and cracks of a coating film are reduced upon press working, thereby corrosion resistance being improved even after working. As a result, car mufflers, heat resistant home electric appliances, etc. having improved corrosion resistance can be produced.

Abstract: A method and apparatus for manufacturing composite materials are provided. In a first embodiment, a binding material is placed on a heat-resistant filter that is placed on hollow particles in a pressurizable container. Under pressure and heat, the binding material flows through the filter and infiltrates the spaces between the hollow particles. In a further embodiment, composite material wire is produced by coating the surfaces of inorganic fiber bundles with a metal oxide by dipping in a solution of a hydrolyzable organic metal compound and hydrolyzing and heat-treating prior to continuous infiltration under pressure.

Abstract: A bright surface structure formed on a member made from metal or resin. A first structure includes: (a) a resin film coated on the member, and (b) a thin metal film formed on the resin film. The thin metal film is made from any one of stainless steel, titanium alloy and nickel alloy. A second structure further includes (c) a clear protective film coated on the thin metal film. A third structure includes: (b′) a thin metal film formed on the resin film of (a), and (c′) a clear colored protective film coated on the thin metal film of (b′). The thin metal film of (b′) is made from any one of stainless steel, titanium alloy, nickel alloy, aluminum, titanium and chromium.

Abstract: A method of producing a metallic coating on an object emerging from a bath of molten metal. The object can for example be a wire or a plate. A magnetic field is created near the point of exit of the object. The object leaves the bath of molten metal via an exit channel containing a meniscus of the bath of molten metal. The thickness of the metallic coating is controlled as a function of the second derivative of the curve of the meniscus and of a capillary number Ca representing the ratio between the viscous forces of the molten metal and the forces of surface tension at the surface of the molten metal.

Abstract: A method for hot dip galvanizing of hot-rolled steel strip, wherein in a first method step, the strip (50) is introduced into a pickling station (10-13) and a layer of scale and reaction products are removed from the strip surface in the pickling station. In another method step, the strip (50) is introduced into a rinsing station (21-23) and residues of the pickle and pickling products are removed from the strip surface in the rinsing station, and subsequently the strip is introduced into a drying station and is dried. And from there, in another method step, the strip is introduced into a furnace (40) and is adjusted to galvanizing temperature under a protective gas atmosphere. In a last method step, the strip is guided through a galvanizing bath and the surface of the (50) is coated with a hot dip galvanizing layer in the galvanizing bath, wherein the strip temperature in the furnace (40) is adjusted at most to 50° K. above immersion temperature of the strip (50) into the zinc bath.

Abstract: A multi-layer solid structure and method for forming a thermal interface between a microelectronic component package and a heat sink so that the structure has a total thermal resistance of no greater than about 0.03° C.-in2/W at a pressure of less than 100 psi. The structure comprises at least two metallic layers each of high thermal conductivity with one of the two layers having phase change properties for establishing low thermal resistance at the interface junction between the microelectronic component package and the heat sink.

Abstract: A method is disclosed for providing inorganic and/or organic coating compositions onto rotor cores to eliminate soldering during aluminum injection. These coatings can also be applied upon electric motor rotors and/or stators laminates as well as other electronic components such as transformers. The disclosed method provides a coating upon a zinc core (e.g., having threads or holes) that is embedded within a cast metal and in turn removed from the casting in order to define a cavity within the casting. The disclosed method also provides at least one film or layer of a coating composition within channels or bar slots defined by the rotor of the electric motor core/rotor (depending upon the design of the motor the slots can be defined within the rotor or open ended along the longitudinal axis of the rotor). The coating composition is also typically applied upon all exposed surfaces of the rotor, e.g., within the channels and exterior surfaces of the rotor. The coated rotor is then contacted with a molten metal.

Abstract: A method and apparatus for rapid and efficient changing-over the coating molten metal in a continuous steel strip coating line from a first aluminum-based coating composition to a second zinc-based coating comprising a first ceramic-lined tank provided with heating means for controlling the temperature of the molten metal in said first tank and a second smaller removable tank without heating means for containing said second coating molten metal adapted to be placed within said first tank, wherein the wall of the second removable tank is effectively heat conductive and preferably has a wall downwardly converging so that its positioning within the first tank is facilitated and damage to its ceramic lining is avoided. The weight of the second tank is mostly supported by the floating forces of the molten bath in said first tank.

Abstract: The invention relates to the field of chemistry and concerns coated reshaped aluminum semi-finished products and/or components which are coated with a two-step hardening/cross-linking coating agent and a method for the production thereof. The aim of the invention is to disclose and to produce coated reshaped aluminum semi-finished products and/or components which as semi-finished products can still be re-shaped and hardened at high temperatures. The object is attained through coated reshaped aluminum semi-finished products and/or components which are coated with an at least two-step hardening/cross-linking coating agent and at most partially hardened/cross linked, and the formed coating film is elastic.

Abstract: Gas wiping apparatus and method can reliably prevent edge overcoat and splash, and has face gas wiping nozzles extending widthwise of a strip material, a pair of baffle plates spaced from an edge of the strip material, an edge wiping nozzle disposed between baffle plates at its inner edge and adjacent the strip material edge, all with critical spacings relative to each other.

Abstract: The invention relates to the coloring of ceramics by means of ionic or complex-containing solutions. Solutions preferred for this contain defined concentrations of at least one of the salts or complexes of the rare earth elements or the elements of the subgroups. The invention also relates to a kit, which comprises at least one stock bottle with such a coloring solution, a receptacle for the coloring as well as optionally a screen.

Abstract: The invention relates to a process for the continuous dip-coating of a metal strip (1) in a tank (11) containing a liquid metal bath (12), in which process the metal strip (1) is made to run continuously through a duct (13), the lower part (13a) of which is immersed in the liquid metal bath (12) in order to define with the surface of the said bath a seal (14). A natural flow of the liquid metal from the surface of the liquid seal is set up in an overflow compartment (25) made in the said duct (13) and having an internal wall which extends the duct (13) in its lower part and the level of liquid metal in the said compartment (25) is maintained at a level below the surface of the liquid seal (14).

Abstract: The subject of the invention is a process for the continuous dip-coating of a metal strip (1) in a tank (11) containing a liquid metal bath (12), in which process the metal strip (1) is made to run continuously through a duct (13), the lower part (13a) of which is immersed in the liquid metal bath (12) in order to define with the surface of the said bath a liquid seal (14). A natural flow of the liquid metal from the surface of the liquid seal (14) is set up in two overflow compartments (25, 29) made in the said duct (13) and each having an internal wall which extends the duct (13) in its lower part and the level of liquid metal in the said compartments is maintained at a level below the surface of the liquid seal (14).

Abstract: A method of producing a metal-coated steel strip includes the steps of forming a metal coating on a steel strip and conditioning the surface of the metal-coated steel strip by smoothing the surface of the strip. The method is characterised in that the conditioning step produces residual stress of no more than 100 MPa in the strip.

Abstract: The subject of the invention is a plant for the continuous dip-coating of a metal strip (1), of the type comprising a tank (11) containing a liquid metal bath (12), a duct (13) through which the metal strip (1) runs and the lower end (13a) of which duct (13) is extended by at least two internal walls (20; 22) each located on one side of the strip (1) and directed towards the surface of the metal bath (12) in order to form at least one compartment (21; 23) for recovering the metal oxide particles and intermetallic compound particles. The duct (13) has a fixed upper part (30) and a movable lower part (31) joined together by a deformable element (32) and means (35) for positioning the movable lower part (31) with respect to the metal strip (1).

Abstract: A method of coating of steel products such as plate and sheet using an aluminum-zinc coating alloy includes modifying the coating bath with a particulate compound constituent in effective amounts to control the spangle facet size of the coated product, improve tension bend rust stain performance, and improve coated product paintability. Constituents include borides such as titanium boride and aluminum borides, carbides such as titanium carbide, and aluminides such as titanium aluminide. The method produces a coated steel product that does not require temper rolling for painting.

Abstract: A production method for an aluminum alloy coated steel sheet. The aluminum alloy coated steel sheet is improved in appearance, corrosion resistance and workability resulting from dipping a base steel sheet into an aluminum alloy coating bath with a Si content of 5 to 15 parts by weight, a Cr content of 0.1 to 1.5 parts by weight and a Mg content of 0.01 to 3.0 parts by weight. Because of excellent workability, peeling of a coating layer and cracks of a coating film are reduced upon press working, thereby corrosion resistance being improved even after working. As a result, car mufflers, heat resistant home electric appliances, etc. having improved corrosion resistance can be produced.

Abstract: An aluminum-coated structural member includes an Al—Si—Fe alloy layer formed on a steel substrate layer. The alloy layer includes a softer region having a hardness smaller than or equal to a hardness of the steel substrate layer, extends from the surface of the steel substrate layer toward a surface of the alloy layer, over a depth range greater than or equal to 50% of a thickness of the alloy layer. The Al—Si—Fe alloy layer has an oxide weight smaller than or equal to 500 mg/dm2.

Abstract: A non-carbon, metal-based, high temperature resistant, electrically conductive and electrochemically active anode of a cell for the production of aluminum has a metal-based substrate to which an adherent coating is applied prior to its immersion into the electrolyte and start up of the electrolysis by connection to the positive current supply. The coating is obtainable from one or more layers applied from: a liquid solution, a dispersion in a liquid or a paste, a suspension in a liquid or a paste, and a pasty or non-pasty slurry, and combinations thereof with or without one or more further applied layers, with or without heat treatment between two consecutively applied layers when at least two layers are applied.

Abstract: According to the present invention, there is provided a carbon-based metal composite material comprising a carbonaceous matrix and a metal component dispersed in said carbonaceous matrix, wherein at least 90 volume percent of the pores of the carbonaceous matrix is substituted with said metal component, and the content of said metal component is 35% or less based on the total volume of said carbon-based metal composite material; a method of producing a carbon-based metal composite material wherein impregnation of the carbon formed body with molten metal under pressure is carried out by pre-heating said carbon formed body and then impregnating the open pores of the carbon formed body with molten metal under a pressure of at least 200 kg/cm2 of the cross-sectional area of the plunger; and a substrate-shaped formed body for an electronic component comprising a carbon-based metal composite material.

Abstract: A method and a system for regenerating a metal bath contaminated by mixed crystals, particularly a tin bath (17) in a hot-dip coating process. A partial stream of the tin bath (17) is removed from the coating tank (15) and is first of all heated above its liquidus temperature in a heating unit (24). Subsequently, the tin bath is conducted over a cooling unit (27) and, while flowing through a filter (29), is cleaned of mixed crystals coming down as a result of the cooling. The filter 29 is a ceramic foam filter made of silicon carbide. Subsequently, the regenerated tin bath (17a) is heated in a melting tank to process temperature, and returned from there to the coating tank (15).

Abstract: A method of adjusting the pH of a strengthening melt for use in strengthening glass substrates, e.g., glass disk substrates for use in data storage devices. A non-particle-forming acid is added to the strengthening melt to lower the pH of the strengthening melt to ≦8. The acid is added while the strengthening melt is in a molten state and selected to avoid particle formation. Nitric acid, for example, is non-particle-forming with respect to nitrate based strengthening melts such as potassium nitrate and/or sodium nitrate. A base, e.g., sodium hydroxide, may be added if the pH of the strengthening melt falls below 5. Strengthening melts are subject to pH shift that can cause glass substrates strengthened therein to etch, creating pits on the substrate surface. Glass disk substrates treated in the pH adjusted strengthening melt are essentially free from such pits, as well as contamination caused by particle formation.

Abstract: A method and apparatus for manufacturing composite materials. In a first embodiment, a binding material is placed on a heat-resistant filter that is placed on hollow particles in a pressurizable container. Under pressure and heat, the binding material flows through the filter and infiltrates the spaces between the hollow particles. In a further embodiment, composite material wire is produced by coating the surfaces of inorganic fiber bundles with a metal oxide by dipping in a solution of a hydrolyzable organic metal compound and hydrolyzing and heat-treating prior to continuous infiltration under pressure. In a further embodiment, the apparatus includes orifices with enlarged diameter sections. In a still further embodiment, an apparatus is provided with ultrasonic vibration.

Abstract: A melting and impregnating apparatus includes an impregnating tank having an inlet sealing portion in the bottom portion thereof, an outlet sealing portion in the upper portion thereof and a drawing portion disposed between the sealing portions; a raw-material heating tank allowed to communicate with the impregnating tank through a heating passage; and pressurizing means for maintaining pressurized states of the inside portions of the impregnating tank and the pressurizing means.

Abstract: A molten metal holding apparatus for the continuous hot dip coating of a metal strip includes a vessel that is substantially rectangular in cross section having long sides and short sides and has formed a slot-shaped opening in a bottom surface, the vessel containing molten metal; subsidiary vessels formed following an outer circumference of an upper end of the vessal and for temporarily storing molten metal that overflows from the upper end of the vessel; chambers formed outwardly following long sides a lower end of the vessel and that communicate with the vessel via slit-shaped branch openings formed at a predetermined slant toward the vessel: a plurality of subsidiary tubes comunicating with the subsidiary vessels; and alternating current electromagnets including a core mounted adjacent to outside side surfaces of the vessel and between the subsidiary vessels and the chambers and a coil wound around the core and to wich an alternating current is supplied.