Abstract: A method of manufacturing an aluminum power transmission rail product with a metallurgically bonded stainless steel cap comprises providing molten aluminum in a tundish; providing a roll formed stainless steel wear cap; pretreating and preheating the stainless steel cap, then introducing that cap into the tundish; co-casting the aluminum and cap through one or more dies; and tensioning the stainless steel cap at an exit of the casting die and rapidly cooling the same. An aluminum-stainless composite product is also disclosed.

Abstract: An object of the present invention is to make it possible to provide a cord, in particular, a cord for reinforcing a rubber article in which rubber permeation properties are improved by coating filaments as constituents of the cord with rubber in a reliable and stable manner. The cord of the present invention is produced by, when the metal filament is guided to an extruder and extruded together with rubber from a mouthpiece of the extruder so that the metal filament is coated with the rubber, juxtaposing plural metal filaments in the mouthpiece and extruding the metal filaments together with rubber.

Abstract: Co-extruded materials and methods for forming co-extruded materials that include images are disclosed. The method may include co-extruding two materials together to form a co-extruded workpiece. The first material may be a base material and the second material may be a graphic material used to form one or more images in a cross-section of the workpiece. One or more cross sectional parts that include the one or more images may then be generated by cutting, slicing or otherwise forming cross-sectional parts from the workpiece.

Abstract: Method of manufacturing a metal cable having two layers (Ci, Ce) of construction M+N, comprising an inner layer (Ci) having M wires of diameter d1 wound together in a helix at a pitch p1, M varying from 2 to 4, and an outer layer (Ce) of N wires of diameter d2, wound together in a helix at a pitch p2 around the inner layer (Ci), the method comprising the following steps performed in line: a step of assembling the M core wires by twisting to form the inner layer (Ci) at a point of assembling; downstream of the point of assembling of the M core wires, a step of sheathing the inner layer (Ci) with a diene rubber composition called “filling rubber”, in the raw state; a step of assembling the N wires of the outer layer (Ce) by twisting around the inner layer (Ci) thus sheathed; and a step of twist balancing. Also disclosed is a device for implementing such a method.

Abstract: A method, for the production of profiles (16) of a light metal material, in particular a magnesium material, by means of extrusion with a hydrostatic extrusion device (10), is disclosed. A volume of material (15) is pressed through a die (14), having the form of the desired profile (16) in order to form the profile (16). A grain refiner is added to the light metal material to form the material volume (15) used in the extrusion process.

Abstract: A metal alloy for use in a wire included in an electrochemical cell is disclosed having an amorphous structure, microcrystalline grains, or grains that are sized less than about one micron. In various embodiments, the microcrystalline grains are not generally longitudinally oriented, are variably oriented, or are randomly oriented. In some embodiments, the microcrystalline grains lack uniform grain size or are variably sized. In some embodiments, the microcrystalline grains have an average grain size of less than or equal to 5 microns. In some embodiments, the metal alloy lacks long-range crystalline order among the microcrystalline grains. In some embodiments, the wire is used in a substrate used in the electrochemical cell. In some embodiments, the metal alloy is formed using a co-extrusion process comprising warming up the metallic alloy and applying pressure and simultaneously passing a core material through a die to obtain a composite structure.

Abstract: A multi-layered heat transfer tube for use in a carburetor for a liquefied gas, comprising an inner tube which is equipped with a passage through which a liquefied gas can pass and an outer tube which covers the outer peripheral surface of the inner tube, wherein each of the inner tube and the outer tube has multiple fins that extend in the direction of the length of the multi-layered heat transfer tube and are arranged along the direction of the circumference of the multi-layered heat transfer tube, at least the outer tube is composed of a fully dense material, and the outer tube covers the entire outer surface of the inner tube and is bound to the inner tube via a metallic bond.

Abstract: The present invention relates to a method of manufacturing a seamless multilayer composite pipe, an apparatus for manufacturing a seamless multilayer composite pipe, and a seamless multilayer composite pipe. The method of manufacturing a seamless multilayer composite pipe comprises the steps of a) providing a seamless metal pipe with at least one continuous layer covering its inner surface, and b) passing the seamless metal pipe through a unit in order to reduce the diameter of the seamless metal pipe by cold working. An apparatus for manufacturing a seamless multilayer composite pipe comprises a unit for providing a seamless metal pipe with at least one continuous layer covering its inner surface, and a unit for reducing the diameter of the seamless metal pipe by cold working.

Abstract: The disclosed electrode terminal, which is used with batteries of which a positive output terminal and a negative output terminal are formed from metals dissimilar to each other, has excellent mechanical strength and can suppress electrical resistance while preventing galvanic corrosion. The electrode terminal (1) for power output is used with batteries (2) of which a pair of output terminals are each formed from a different metal, and has: a solid cylindrical shaft (10) that attaches to one output terminal and that is formed from the same metal as the one output terminal; and an outer cylinder (11) that connects with the cylindrical shaft (10) and that is formed from the same metal as the other output terminal. The shaft (10) and the outer cylinder (11) are unified by means of metallic bonding.

Abstract: Apparatus for continuous extrusion of an aluminum sheathing on to a core cable includes a rotatable wheel formed with two identical circumferential grooves outwardly bounded by arcuate tooling discharging through radial exit apertures to an extrusion chamber positioned around a portal mandrel. A powered pay-off reel is arranged continuously to supply core cable through the mandrel while aluminum sheathing is extruded as a loose fit from extrusion chamber around the core cable. The extruded cable is discharged through cooling device to roller corrugator including a rotating frame mounted on carriage freely moveable axially of the cable and provided with a rotational drive having a roller arranged to form a continuous helical indentation in the sheathing. Pneumatic actuating cylinders positioned on the carriage provide a constant, low magnitude, tension on the portion of the sheath intermediate the extrusion chamber and roller corrugator and limit forces tending to distort the uncooled sheath.

Abstract: The present invention provides a magnesium-based composite material that can achieve excellent performance such as high tensile strength not only at ordinary temperature but also at high temperature. The magnesium-based composite material of the present invention is Al2Ca-containing magnesium-based composite material, wherein said composite material is obtained by a solid-phase reaction of an aluminum-containing magnesium alloy and an additive, said additive being calcium oxide, and said composite material contains Al2Ca formed in the solid-phase reaction. In the magnesium-based composite material, CaO, in combination with Al2Ca, can be dispersed.

Abstract: A method is provided for producing a support structure, preferably a support structure for a vehicle seat having at least one seat shell for the seat part and/or the backrest of the vehicle seat, having the following method steps of producing a metal semi-finished product and reshaping it into an essentially flat plate, detaching a plate part from the plate, and deforming the plate part, the production of the metal semi-finished product being performed by extrusion. The semi-finished product may be already formed into a flat plate by the extrusion or the extrusion is performed with production of a curved plate, which is subsequently reshaped into a flat plate.

Abstract: A method for manufacturing a component of a vehicle structure or vehicle seat structure is provided that includes, but is not limited to pressing a starting material through a die in order to produce an extruded product, separating a section from the extruded product, and forming the separated section into the component. A varying wall thickness of the separated section is produced during the pressing through the die.

Abstract: The invention relates to a new preparation technique of composites, in details, i.e. a method of producing laminated composite materials of different alloys. In the preparation method, the bi-layer or multi-layer composites are prepared by means of the equal channel angular extrusion/pressure (ECAE/ECAP). Firstly, the appropriate alloys pairs or groups are selected, and the rational arrangements are carried out after pre-treating surfaces; then, the clad process is performed by extrusion and shear deformation in ECAE die; finally, the composite material is produced after one single pass or multiple passes clad extrusion. The annealing treatment can be performed subsequently to enhance the interfacial bonding strength by diffusion after the clad extrusion, and the heat treatment parameters consist of annealing temperature and holding time, which are chosen carefully to meet the demands of the refining microstructures and good properties for both the interfaces and individual component metals.

Abstract: Method of manufacturing consumable filler metal wire, rod, or stick, and the like, of predetermined length and cross-section for use in welding, including: providing an ingot of a first metal and one or more different further metals; forming composite product by providing the ingot of the first metal with one or more hollow cores in substantially parallel relation to each other and locating in the hollow cores the different further metal or metals; applying pressure to the composite product to reduce its cross-section to a predetermined cross-section to form feedstock. Optionally further deforming the feedstock by mechanical pressure to form wire, rod or stick, of final cross-section so ultimate alloying of the first metal with the different further metal or metals occurs when the wire, rod or stick is used as filler material or consumable electrode during welding. Using this filler metal for welding an assembly of aluminium members.

Abstract: The method has a first material of lesser hardness acting as a rod-shaped carrier for a second material of greater hardness, each materials formed within a respective extrusion press tool and the plastic mass flow of the greater hardness material fed to the extrusion press tool for the lesser hardness material for providing a common plastic mass flow in the form of a rod-shaped body with a core and an outer region. An Independent claim for a device for manufacture of a hard metal workpiece is also included.

Abstract: A method for forming metal-cladded metal matrix composite wires. The method associates a ductile metal cladding to the exterior surface of a metal matrix composite wire comprising a plurality of continuous, longitudinally positioned fibers in a metal matrix.

Abstract: The invention includes a method of forming an aluminum-comprising physical vapor deposition target. An aluminum-comprising mass is deformed by equal channel angular extrusion. The mass is at least 99.99% aluminum and further comprises less than or equal to about 1,000 ppm of one or more dopant materials comprising elements selected from the group consisting of Ac, Ag, As, B, Ba, Be, Bi, C, Ca, Cd, Ce, Co, Cr, Cu, Dy, Er, Eu, Fe, Ga, Gd, Ge, Hf, Ho, In, Ir, La, Lu, Mg, Mn, Mo, N, Nb, Nd, Ni, O, Os, P, Pb, Pd, Pm, Po, Pr, Pt, Pu, Ra, Rf, Rh, Ru, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Ta, Tb, Te, Ti, Tl, Tm, V, W, Y, Yb, Zn and Zr. After the aluminum-comprising mass is deformed, the mass is shaped into at least a portion of a sputtering target.

Abstract: A clad billet 120 has a core material 122 of which outer surface is coated by a coating material 124. A circular front plate 126 is provided at the head of the clad billet 120. The front plate 126 is made of the same material as the coating material 124. As the clad billet 120 is extruded, the front plate 126 first flows out. Accordingly, instead of the core material 122, the front plate 126 forms dead metal. Moreover, since this front plate 126 is made of the same material as the coating material 124, a defective clad such as a three layer clad are not formed. Also, since a billet thrusting face 102a is tapered toward an axis A of a die at an angle of 55-85 degrees, the volume of dead metal itself is reduced, and therefore it is possible to flow out the defective clad, even if it is generated, at an early stage of extrusion.

Abstract: A clad billet 120 has a core material 122 of which outer surface is coated by a coating material 124. A circular front plate 126 is provided at the head of the clad billet 120. The front plate 126 is made of the same material as the coating material 124. As the clad billet 120 is extruded, the front plate 126 first flows out. Accordingly, instead of the core material 122, the front plate 126 forms dead metal. Moreover, since this front plate 126 is made of the same material as the coating material 124, a defective clad such as a three layer clad are not formed. Also, since a billet thrusting face 102a is tapered toward an axis A of a die at an angle of 55-85 degrees, the volume of dead metal itself is reduced, and therefore it is possible to flow out the defective clad, even if it is generated, at an early stage of extrusion.

Abstract: A tool for chip-forming machining is made by passing first and second compounds through first and second coaxial dies, respectively, whereby the first material forms a center core of the tool, and the second material forms an outer rod of the material. The material of the core is tougher and less wear-resistant than the material of the outer rod. The coaxial first and second compounds are passed through a shaping die and then through a flute-forming structure which forms chip flutes in the outer rod.

Abstract: A composite piston and method for forming such a piston for a reciprocating machine such as an internal combustion engine. A blank is formed from a pair of dissimilar alloys, one of which has substantially greater properties such as strength or abrasion resistance. The blank is formed by a process whereby he two materials are initially bonded and extruded into a composite blank. The blank is forged into a piston in such a way that the two materials are bonded together in the forging process. The higher strength and/or abrasion resistance material forms at least a part of the outer surface of the piston in areas where the better properties are required. The other material backs up the higher strength or hardness material in necessary areas so as to provide an integral structure that has lightweight, low costs and nevertheless the desired properties.

Abstract: A method is proposed for producing a metal tube (1) with one or several optical fibers (2) extending therethrough. Metal (10) applied to the surface of a frictional wheel (11) is conveyed to a retaining space (12) by applying pressure and temperature. The metal (10) subsequently exits from the retaining space (12) through the annular exit opening (16) of a forming nozzle (17) in a direction which is approximately tangential to the circumference of the wheel, and solidifies to form the metal tube (1). The optical fibers (2) are passed through a feed opening (19) disposed in the center of the forming nozzle (17), with all sides of the optical fibers spaced apart from the exit opening (16). The tube forming process is repeated to form an outer metal tube (4) on the metal tube (1) with the optical fibers (2) disposed therein.

Abstract: An extrusion process is described where a reinforcing element is fed into an extrusion matrix while the reinforcing element is under sufficient tension to elastically elongate the reinforcing element. When the extruded matrix is hardened (e.g., by cooling after extrusion), the reinforcing element remains inserted within the body of the extruded article in a pre-stressed form. A reinforced extruded article according to the present invention includes the extruded material and at least one embedded element under elongated tension. In a preferred embodiment of the invention, the embedded element has a higher tensile than that of the extruded material. The reinforcing member is able to elastically stretch or lengthen under a load. A preferred embodiment of the invention uses wire rope (twined, braided, cabled, woven, non-woven, or mixtures thereof) with different, varying or larger angles (as with larger helix angles) to give the extruded material a larger surface area with which to grip the extrusion.

Abstract: A method of forming a closed-end vessel by backward extrusion comprises providing an extrusion billet having a front surface with an axial recess and a body of an extrudable material positioned in the recess. Backward extrusion results in the formation of a closed-ended vessel, for example a pressurized gas cylinder, composed of the material of the extrusion billet with a weld bonded inner surface lining of the extrudable material.

Abstract: A method for manufacturing an airfoil is provided which includes the steps of: a) providing a billet of discontinuously reinforced aluminum having at least 10 volume percent of silicon carbide as a reinforcing element, and no more than 30 volume percent of silicon carbide as the reinforcing element; 2) extruding the billet into an airfoil shaped geometry from a die, wherein the geometry includes a first wall, a second wall disposed opposite the first wall, a leading edge, a trailing edge disposed opposite the leading edge, and a first cavity disposed between the first and second walls, and the leading and trailing edges.

Abstract: An extruder for extrusion manufacturing a rod of hard metal or ceramic with at least one helical inner bore. A plasticized mass of hard metal or ceramic is simultaneously forced through a die and twisted. Either the mass is twisted uniformly over the cross-section of the billet by a spinner immersed in the mass or the spinner is rotated by the mass. The mass emerges either subject to torsion or entirely or mostly without torsion from a smooth downstream channel through the die. A filament-shaped material extends or is injected into the mass to produce the inner bore or bores.

Abstract: A compound electrode, in particular an electrode for a spark plug, has a core composed of a first electrically conductive material, and a casing deformed to surround the core and composed of a second electrically conductive material. The casing is formed in a single extrusion molding step that also shapes the core and simultaneously forms the cross-sectional profile of the electrode.

Abstract: Conventionally co-axial cable is made in a continuous extrusion machine by continuously extruding an aluminium tubular cladding (1) through an annular die and simultaneously continuously introducing a core (4), comprised of a conductive wire surrounded by insulation, through an bore in a mandrel (3). A gap is inevitably present between the outer surface of the core (4) and the tubular cladding (1). To eliminate the gap it is necessary to reduce the diameter of the tubular cladding by swagging or drawing step by compacting the insulation of the core before introduction to the mandrel (3). The insulation then gradually expands to recover its original diameter and fill the cladding which has been extruded to its final diameter.

Abstract: A coated wire or other elongated article production system having means to form wire or other elongated article in tandem with an extruder of substantially solvent-free polymer in tubular form around the wire or article. The tubular polymer is applied to the wire or article with the aid of a vacuum, and the froming speed relative to the rate of polymer extrusion is controlled to thin the tubular polymer between its extrusion and its contact with the wire or article.

Abstract: The present invention relates to the control of grain structure in unalloyed zirconium metal and, more particularly, to the control of grain structure in zirconium metals containing less than 300 parts per million Fe.

Abstract: A process and a device for manufacturing an extruded section of an aluminum alloy containing additions of boron or compounds thereof are intended to simplify the manufacture of aluminum alloy sections for use in nuclear science and technology. Using a boron-containing aluminum-based raw material a section is to be formed such that its design ensures adequate stability and at the same time the necessary screening properties. To this end a billet having a core of aluminum alloy with additions of boron or the like and a mantel surrounding the same is manufactured and hot formed by extrusion, such that, using the molten metal route or powder metallurgy, a blank of aluminum alloy of particular alloy groups with additions of boron or its compounds at a concentration of 0.05 to 50 wt % is taken as the starting basis.

Abstract: A process of making round tubes covered on the inside with a sleeve of a thickness on the order of 20 to 30% of the total thickness of the tubes. The components of the tube consist of steel of strong mechanical characteristics and of an interior of stainless steel or a noble alloy. Both components are united by means of metallurgic cohesion, the result of which is a single tube, in effect. The making of the combined tube is achieved by reforming, piercing and extrusion at the same temperature.

Abstract: A method of producing bimetal electrodes is disclosed in which a core of one metal is positioned within a cup of another metal so that the core is recessed back from the open end of the cup. In two embodiments, where the core is fully encapsulated, the open end of the cup is initially bottled or bent inward and subsequently the assembly is pressed through an extrusion die with a tool having a nose with an area substantially equal to the area of the core. In one such embodiment, a weld lug is produced by said tool during the extrusion. Such tool completes the closing of the open end of the cup to fully encapsulate the core and applies the principal extrusion force through the closed end to the core and from the core to the forward end or originally closed end of the cup. Subsequently, the extruded part is trimmed and additionally worked as required. In another embodiment, similar tooling is provided to produce an electrode in which the core is not fully encapsulated.

Abstract: A method for producing a composite spark plug electrode is disclosed. The method comprises forming a first metal into a cup having an open end, a closed end and a wall surrounding a central opening which extends a distance z from the closed end to the open end. The method also comprises forming, from a second and different metal, a right circular cylindrical core sized to be received in the central opening in close fitting relationship with the wall therearound, and extending from the closed end toward the open end a distance less than z, and positioning the core in the central opening, thereby forming a composite billet having first and second ends corresponding, respectively, with the open and closed ends of the cup. Finally, a portion of the composite billet is extruded, second end first, through an extrusion orifice of a die with a force applied to the first end of the composite billet by an end of a tool.

Abstract: A device for manufacturing a laminated semifinished material by indirect extrusion of a sintered-bond blank consisting of layers of metal, metal alloys, metal mixtures or mixtures of metals and nonmetals comprises a vessel with a rectangular cutout or extrusion chamber and a one- or multipart extrusion die with one or several cutouts. A surface of the die facing the blank is profiled in the form of one or more roof gables, the surfaces of which gable forms extend perpendicularly towards the cutout from a sliding surface of the extrusion die.

Abstract: A core blank made of a material lighter than that of the piston is placed into a blind hollow of a barrel-shaped piston blank. The composite blank of the piston, thus formed, is subjected to a direct cold straight-through extrusion through a die. A piston is produced wherein the entire surface of the core is congruent with the internal surface of the piston and is in a clearanceless preloaded contact therewith.

Abstract: An inner stainless-steel tube having an outer frustoconical faying surface is fitted into an outer carbon-steel tube having a matching inner frustoconical faying surface, and these tubes are friction welded over their entire faying surfaces by pressing the tubes together in their axial direction to obtain a high contact pressure due to a wedge action and, at the same time, imparting rotation thereto relative to each other thereby to obtain an integrally bonded, laminated, tubular blank, which is then extended by a suitable process such as rolling into a clad steel tube. The tubular blank can also be slit in its axial direction and flattened into a laminated flat blank, which can be rolled into a clad steel plate. The inner tube may be replaced by a solid core metal. In this case, an integrally bonded blank made up of the inner core metal and the outer tube is extended into a clad steel tube or into a clad steel shape.

Abstract: A process allows the production of composite sections made of at least two component parts such as conductor rails or the like having a beam-like section with a facing in the form of a conductive metal strip. The process makes use of an extrusion die whereby at least one of the components of the composite section is fed to the die by means of frictional force on a face which moves continuously towards the die.

Abstract: A method of providing a member having a metal core with a nonferrous coating wherein the metal core affords strength and rigidity while the nonferrous outer coating, or cladding, provides a non-corrodible surface and wherein the cladding is of such uniform thickness that final forming of the member may be performed without penetrating or breaking the coating, or exposing the core. The cladding is applied by extruding the nonferrous material in a cross-axis die where it reaches a plastic state and passing the metal core through the plastic non-ferrous metal in the die with the high extrusion pressure creating heat to render the nonferrous metal in a plastic state and further extruding the nonferrous metal around the metal core as it exits from the die, whereby to obtain a wrought structure of the clad coating, without reducing the cross-sectional area of the core during the extrusion operations.

Abstract: A composite section comprises a beam-like section which may in particular be made of a light-weight metal, and a facing of at least a part of at least one face of the beam-like section made of another metal. The beam-like part is produced by extruding a billet of metal through a die, and at the same time the facing strip is fed through the shape-giving opening in the die. Inside the die there is provided at least one moving face which may e.g. be in the form of a wheel, over which the facing strip passes in being fed to the die opening. Also the strip can be deformed during feeding or extrusion to provide a variety of shapes. The wheels can be shaped to effect the shaping of the strip. They also reduce friction and wear in the die. Measures are taken to allow easy access to such wheels for ease of repair or for changing the wheels.

Abstract: A bi-metal resistance welding electrode has a dispersion strengthened copper tip and a high conductivity copper shank. The electrode is made by forming a tip member in two successive upsetting operations to produce a tip member having a coating of high conductivity copper covering substantially all of one end thereof. A solid, high conductivity copper, cylindrical billet is formed and brazed to the tip member at its coated end to form an extrusion blank. The extrusion blank is back extruded with the high conductivity copper material being worked substantially, while only partially back extruding the tip portion of the extrusion blank.

Abstract: Apparatus for the continuous forming of material by extrusion and having a rotatable wheel member with an endless groove therein, a stationary shoe member overlying part of the length of the groove and having a portion which projects into said part of the length of the groove and is of a width substantially equal to that of the groove so as to form a passageway therewith, a stationary abutment member associated with the shoe member and projecting into the groove so as to block the downstream end of the passageway, is characterized by the improvement that the wheel member has one or more endless grooves in its periphery, arranged in parallel planes where more than one groove is provided, the shoe member has as many projecting portions as grooves, the or each projecting portion engages the or the respective groove, a duct leads from the passageway formed by the shoe member with the or each groove, through the or the respective projecting portion into a single chamber formed in the shoe member, and one or more d

Abstract: An improved method for manufacturing a composite metal wire including a core metal wire having extruded therearound a coating metal layer which is different in material from the core metal wire, includes feeding the coating metal into a narrow passageway which is defined between a circumferential groove formed on the outer edge of a rotary wheel and a close fitting surface of a fixed shoe block, carrying the coating metal towards an outlet end of the passageway by frictional drag with the surface of the passageway in accordance with the rotation of the wheel, and passing a core metal wire harder in material than the coating metal through a covering chamber of a larger cross sectional area which is provided with a die and a nipple at the front and rear portions, respectively, whereby the core metal wire is covered with the coating metal in the covering chamber so that a predetermined construction of a composite metal wire is extruded through the die.

Abstract: A process and device for manufacturing composite sections by means of extrusion are described. The composite sections comprise at least two components, one of which is fed into the stream of metal being extruded and is securely joined to the face of the product without coming into contact with the face of the extrusion die.

Abstract: A process allows the production of composite sections made of at least two component parts such as conductor rails or the like having a beam like section with a facing in the form of a conductive metal strip. The process makes use of an extrusion die whereby at least one of the components of the composite section is fed to the die by means of frictional force on a face which moves continuously towards the die.

Abstract: A process and device for carrying out the process allows for the extrustion of composite sections comprising a beam-like section made of a light metal and at least one insert made of another metal which provides a facing on at least one surface of the beam-like section. The beam-like section, which may be a conductor rail, is produced by extruding through a shape-giving die whereby at least two composite sections are produced simultaneously and the facing strips are positioned pairwise between opposite lying parts of the beam-like sections. The present invention allows the facing strips to be introduced into the extrusion device without the extreme bending previously experienced. Brittle materials which could not withstand the extreme bending experienced heretofore can now be used for facing material.

Abstract: A method for manufacturing a base of a semiconductor device is made up of the steps of silver soldering a metal ring of weldable and extrudable material on a metal blank of thermally and electrically conductive material to thereby form a base body; and thereafter extruding the base body so as to form a generally complete base. When the base body is extruded, a raised portion for mounting a semiconductor pellet thereon and a stud to be threaded are formed on the upper and lower surfaces of the base body, respectively and at the same time, an annular projection, which is used as a projection to weld to the upper surface of the base a shell to cover the semiconductor pellet, is formed on the upper surface of the metal ring.

Abstract: Apparatus for manufacturing a composite metal wire including a core metal wire having extruded therearound a coating metal layer which is different in material from the core metal wire. The coating metal is fed into a narrow passageway which is defined between a circumferential groove formed on the outer edge of a rotary wheel and a close fitting surface of a fixed shoe block, the cross-sectional area therebetween decreasing for half the distance between entry and discharge and thereafter increasing until discharge. The coating metal is carried towards an outlet end of the passageway by frictional drag with the surface of the passageway in accordance with the rotation of the wheel.

Abstract: An improved method for manufacturing a composite metal wire including a core metal wire having extruded therearound a coating metal layer which is different in material from the core metal wire, includes feeding the coating metal into a narrow passageway which is defined between a circumferential groove formed on the outer edge of a rotary wheel and a close fitting surface of a fixed shoe block, carrying the coating metal towards an outlet end of the passageway by frictional drag with the surface of the passageway in accordance with the rotation of the wheel, and passing a core metal wire harder in material than the coating metal through a covering chamber of a larger cross sectional area which is provided with a die and a nipple at the front and rear portions, respectively, whereby the core metal wire is covered with the coating metal in the covering chamber so that a predetermined construction of a composite metal wire is extruded through the die.