Abstract: The present invention provides a method of forming a flow restriction in a tube to be used as a capillary in a refrigeration system. The method includes providing at least one longitudinally disposed groove in the internal wall of the tube, shaping the tube longitudinally to a preselected configuration, and then squeezing a section of the tube while directing a fluid therethrough until the fluid reaches a preselected pressure.

Abstract: The upper structure of an aluminum melting furnace is constructed with supporting structure for a fossil fuel burner and supporting structure for electrically operated heating elements. The furnace may thus be operated with alternate heating systems, one system using fossil fuel and the other electricity.

Abstract: A metastable mullite phase is formed in the physical structure of investment casting molds by employing alumina flour of a particle size less than 100 microns.

Abstract: An adjustable crimp die assembly adapted to be mounted in a press for crimping a plurality of terminals onto stripped insulated wire leads. The crimp die assembly includes a base with a terminal supporting structure having a crimp station whereat a terminal is crimped onto a wire lead, punch asssembly opposite the crimp station, and a terminal feed assembly associated between the punch assembly and the terminals for feeding the terminals one at a time to the crimp station in response to the movement of the punch assembly. The crimp die assembly has an adjustable terminal feed assembly including a pawl member and a cam assembly operably associated between the punch assembly and the pawl member for moving the pawl member in response to the movement of the punch assembly whereby the terminals are fed to the crimp station. The cam assembly is changeable so as to change the distance the pawl member feeds the terminals to the crimp station.

Abstract: A tire mold and method for producing vent holes therein comprising placing metal tubing in the desired locations on a female core for producing the tire mold, which after the casting metal is poured onto the core, encompasses the metal tubing leaving a vent hole in the metal of the tire mold at the respective tubing, after which the core material is removed. This eliminates conventional practice of drilling vent holes in a tire mold and provides for vent holes in areas heretofore inaccessible.

Abstract: In a plant a carrier for withdrawing an ingot is a drum, rotatably mounted about the horizontal axis thereof, adjacent to the side of a mould near its wall shaping the internal surface of the ingot and coaxial with the wall, with a base plate having a dummy bar and an electrode holder being fastened to the drum shell; the electrode holder being electrically insulated from the drum and carrying at least one electrode curvilinear in shape and encompassing a part of the drum and having a clearance therewith to preclude electrical contact between the drum and the electrode; the drum, while turning, serving also as a mechanism for feeding the electrode into the mould melting space.

Abstract: The disclosed horizontally divisible furnace shell comprises a spherically shaped bottom section and truncated cone cover-like shaped middle and top wall sections stacked upon the bottom section, the form of the middle and top sections resulting in barrel-shaped shell walls. Each of the three modular sections has a metal casing with a refractory lining which may be made of firebrick or fireclay. Each wall section has an inwardly projecting ledge at its lower end for supporting the refractory lining. For interconnecting and aligning the sections, tapered locating pins and sockets are provided between all sections. Water-cooled flanges are preferably provided at the upper and lower ends of the top wall section. The joint between the middle and top wall sections is stepped upwardly adjacent the pouring spout so that such joint will be above the level of the molten metal, even when the furnace is tilted to pour out the metal.

Abstract: A pattern representing the airfoil section of a stator vane is located on a supporting block adapted to be received in a casting fixture. A locating block is also provided in the casting fixture in spaced relation to the airfoil pattern on the supporting block. The angle of the airfoil pattern is adjusted within the casting fixture chamber relative to the locating block. A fixed mold is adapted to mate with the mold formed in the adjustable cast fixture and the two molds are placed on a lathe by means of the locating block set in one of the molds so that the surfaces for receiving the inner and outer shroud mold cavities can be formed. The molds are then matched with the inner and outer shroud cavities, and the wax or plastic pattern material is injected into the so-formed mold cavity for forming the investment pattern. When it is necessary to produce a new vane casting with modified stagger angle, it is necessary to re-orient the half airfoil pattern in the casting fixture relative to the locating block.

Abstract: A preheater for uniformly heating the refractory lining of a ladle, ingot mold or the like. A concave, refractory lined cover is provided with one or more flues for exhausting noxious fumes and products of combustion. There is also provided an axially extending burner for projecting a flame onto the walls of the ladle refractory lining. Fluid operated means are provided for vertically tilting the boom which pivotally supports the ladle cover to enable the cover to be laid, with a tight fit, on the mouth portion of the ladle, - also to enable lifting of the cover and lateral swinging thereof from the closed position. A modification, particularly suitable for large ladles, is to provide a plurality of burners which emit flames substantially tangentially inwardly of the cover to uniformly heat the ladle lining.

Abstract: Ball rounding apparatus includes a rotatable inner rolling die and a stationary outer die. Forged steel balls travel through an arcuate path between the dies for final rounding. The stationary outer die is made up from a plurality of segments known as die shoes. A plurality of circumferentially-spaced die shoe tension take up devices bias the die shoes toward the inner die. The die shoe tension take up devices include a one-piece plunger having an enlarged head with a flat outer surface engaging the die shoes. An integral smaller diameter shaft extends from the head of the plunger, and a small radius is formed between the shaft and head. The plunger shaft is guided for longitudinal movement through a guide sleeve, and a coil spring is positioned between the plunger head and guide sleeve for urging the head into engagement with the die shoes. The guide sleeve is adjustable for varying the distance between such sleeve and the plunger head to vary the force exerted by the coil spring.

Abstract: A method of die casting high melting point metals such as ferrous metals by introducing a shot of molten metal under pressure into a die cavity in which the molten metal for each shot is produced by melting a slug in an induction furnace and wherein the melting is done in two stages in the first stage there being applied a relatively great heat input to the charge at a relatively high rate and in the second stage there being applied a reduced heat input to the charge at a reduced rate.

Abstract: A process is provided by determining the castability of a metallic composition comprising a metal matrix containing secondary solid and discrete degenerate dendrites. The composition is heated and a calibrated probe is contacted under force to the surface of the composition and a parameter of distance the probe travels into the composition as a function of the force is determined. The composition is castable when the parameter measured corresponds to the condition when at least about 50 wt. % of the secondary solid is liquified and between about 25 and 90 wt. % of the total composition is liquified.

Abstract: A high efficiency aluminum scrap melting system is provided in which a portion of the hot combustion gases employed to melt the aluminum in a hearth is recycled through scrap-receiving preheat compartments to preheat scrap and volatilize contaminants as the scrap is fed to the hearth, the remainder of the hot combustion gases leaving the hearth as hot exhaust gases being optionally employed through a recuperator to preheat air which is fed to a combustion burner system used to burn hydrocarbon fuel and provide heat for the overall system. Energy available in the contaminants also supplements the energy supply to the system.

Abstract: The mold for continuous casting is prepared by lining the wall with glass either by pasting a glass fiber mesh thereon or by coating it with a mixture of glass powder and adhesive.

Abstract: A method of and device for forming vacuum sealed molds, in which suction is applied to a charging material charged into a flask to remove the charging material adjacent the top of a sprue or a communicating passage thereby forming a cup-shaped pouring basin for the sprue or a funnel-shaped concave for the passage in a mold, thereafter a shielding film is applied over the upper surface of the flask, and a suction is applied to the charging material within the flask.

Abstract: A method of inserting a core in a sand mold wherein the sand mold is provided with a cavity for receiving the core, and, during the insertion of the core in the cavity, the sand around the core is compressed by an element or, if the core print is provided with a retaining projection, a further projection on the core print is provided for compressing the sand around the cavity in the sand mold which receives the retaining projection.

Abstract: A method of and apparatus for casting steel into a continuous casting mold, wherein the steel is introduced into the casting head to a point beneath the liquid metal pool and the steel, prior to its departure out of a pouring tube, is treated with an inert gas while forming small gas bubbles. The resultant steel-gas mixture during its outflow into the metal pool in the form of a thin, coherent fan or pattern is simultaneously introduced downwardly as well as also laterally. The pouring tube possesses an outlet opening in the form of a downwardly and laterally extending slot and a gas infeed means above such outlet opening.

Abstract: A ball sizing machine for sizing an internal passage in a workpiece in which pressure is employed to force a sizing ball through the passage against a fluid counter-pressure. The opposite ends of a passage to be sized are sealed at each end with a tapered ram plug with the sizing ball within the head end of the passage. The passage is filled with a fluid, such as oil, from the tail end of the passage. When passsage has been filled from the tail end to a predetermined pressure, the system is conditioned to permit a metered flow of fluid out of the tail end when pressure is applied to the head end of the passage in front of the ball to force the ball through the passage.

Abstract: A method characterized in that the material for a tube product is a Thermit mixture in powder form incorporating at least one metal oxide and its reducer, wherein the mixture is ignited while a cylindrical part is set spinning, which is continued until a liquid melt of the mixture is separated into a metal layer and a layer of corundum which eventually crystallize so that a twin-layer tube product is formed. The invention suggests a number of additional, optional method steps.

Abstract: A system for continuously quench-pickling cast rod from a continuous casting machine wherein molten metal is poured into a mold of a casting device and cooled and solidified into a continuous solid bar, the bar is elongated and reduced in its cross-sectional area to form continuous rod, and the rod is arranged in a coil. The surface of the hot rod from the rolling mill is contacted with a pickling fluid, such as a citric acid solution, after the rod leaves the rolling mill and before the rod is arranged in a coil, to simultaneously quench and pickle the rod.