Abstract: A pressure die casting process and its machine are described to produce a highly efficient copper rotor for AC induction motors widely used in various industries. The pressure die casting process and the machine facilitate improvement in efficiency and performance of AC induction motors by providing maximum filling of copper with minimum porosity. Thus, a compact and convenient method is provided to cast a wide range of copper rotors of various extensive length.

Abstract: A rotor with a pressure-deviation generating assembly includes a main body having a plurality of tunnels extending longitudinally, a first pressure-deviation generating assembly, and a second pressure-deviation generating assembly. The first pressure-deviation generating assembly generates a plurality of first high-pressure regions and first low-pressure regions. The second pressure-deviation generating assembly generates a plurality of second high-pressure regions and second low-pressure regions. At least one first flow flows through some of the tunnels from the first high-pressure regions to the second low-pressure regions, and at least one second flow flows through the rest of the tunnels from the second high-pressure regions to the first low-pressure regions. Thereupon, a bi-directional air flow pattern inside the tunnels can be built to promote the heat dissipation of the rotor.

Abstract: Housing vent techniques are described. In one or more implementations, a molding process is used to form a housing of a computing device that includes a plurality of ribs disposed within an internal surface of the housing. A cutting operation is performed to an outer surface of the housing that is opposite to the internal surface to remove material of the housing between the plurality of ribs to form one or more vents that are configured to permit air to pass between an interior and exterior of the housing.

Abstract: The present invention is concerned with a method of manufacturing an aluminum-containing composition, wherein the composition having substantially 0.4 wt % silicon, 0.7 wt % iron, 0.2 wt % copper, 0.1 wt % manganese, 1.1-1.8 wt % magnesium, 0.1 wt % chromium, 0.25 wt % zinc and 96.45-97.15 wt % aluminum, or being Aluminum 5050 as defined by the International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys of the Aluminum Association. The method comprises a casting step, an extrusion step, and an anodizing step.

Abstract: A method of making an article adapted for use as a wear resistant working surface of a roll includes positioning hard elements in predetermined positions on a bottom surface of a mold. The hard elements comprise a first end and an opposed second end. The second end of each hard element rests on the bottom surface, partially filling a void space and defining an unoccupied volume in the mold. Inorganic particles are added to the mold to at least partially fill the unoccupied volume and provide a remainder space. The hard elements and the inorganic particles are heated to an infiltrating temperature and infiltrated with a matrix material. The matrix material is cooled and solidified and binds the hard elements and the inorganic particles in the article.

Abstract: A method for manufacturing a bolster of a railway car truck includes providing a drag portion and a cope portion of a mold. In a main body section of the mold, a parting line that separates the drag portion from the cope portion is substantially centered between portions of the mold that define brake window openings in sides of the bolster. One or more cores are inserted into the mold and a molten material is poured into the mold to thereby case the bolster.

Abstract: A method of manufacturing a side frame mold for casting a side frame of a railway car truck includes forming a drag and a cope portion of a mold from a casting material to define an exterior surface of a drag portion and cope portion, respectively, of the side frame. The mold includes a portion for casting the pedestal jaw of the side frame. The drag and the cope portions are then cured.

Abstract: A magnetic sputtering target which contains B and is obtained by a melting and casting method, wherein the B content is 10 at % or more and 50 at % or less, and the remainder is one or more elements selected from Co, Fe, and Ni. Based on the method of the present invention, the sputtering target, in which gaseous impurities are few, there are no cracks and fractures, and segregation of its main constituent elements is minimal, is obtained. Consequently, when sputtered with a magnetron sputtering device comprising a DC power supply, this sputtering target yields a significant effect of being able to inhibit the generation of particles during sputtering, and improve the production yield upon forming thin films.

Abstract: The present invention relates to an implant, in particular an intraluminal endoprosthesis, the body of which comprises at least predominantly a material with iron as the main constituent. For accelerating the degradation, the material comprises sulfur as first minor constituent with a concentration of more than 0.2% by weight and not more than 1% by weight, preferably not more than 0.5% by weight, and comprises as second minor constituent at least one element of the group which comprises calcium, manganese and magnesium. Furthermore, a method for producing such an implant is described.

Abstract: A set of dies are composed in order to remove excess metal from a casting with a press. A method of removing the excess metal from the casting includes the steps of attaching a cutter to one of the stationary die side or the movable die side; setting a work on the other side; and punching excess metal of the work into a recess shape by one punching motion of the movable die with a plurality of blades from the first blade, which is smaller, to the final blade, which is larger and protruded, when the excess metal of the work is removed by a punching motion of the movable die conducted on the stationary die. A cutter includes a row of blades in which a plurality of blades are arranged step-wise having a change in the form from the first blade, which is smaller than the final shape of the excess metal to be punched, to the final blade, the shape of which is the same as the final shape.

Abstract: A set of dies are composed in order to remove excess metal from a casting with a press. A method of removing the excess metal from the casting includes the steps of attaching a cutter to one of the stationary die side or the movable die side; setting a work on the other side; and punching excess metal of the work into a recess shape by one punching motion of the movable die with a plurality of blades from the first blade, which is smaller, to the final blade, which is larger and protruded, when the excess metal of the work is removed by a punching motion of the movable die conducted on the stationary die. A cutter includes a row of blades in which a plurality of blades are arranged step-wise having a change in the form from the first blade, which is smaller than the final shape of the excess metal to be punched, to the final blade, the shape of which is the same as the final shape.

Abstract: A method for producing a lightweight turbine blade for a gas turbine is disclosed. In an embodiment, the method includes casting of a blade element with a blade wall and at least one cavity enclosed by the blade wall. The blade wall is at least partially reduced in thickness by machining after the casting. This provides a method for producing a blade element, in which the wall thickness of the blade wall can be adapted to the mechanical load of the blade element, and the weight of the blade element can be reduced at the same time.

Abstract: An improved method for manufacturing a vaned diffuser (101) of a turbocharger, preferably from aluminum or an aluminum alloy, where the vaned diffuser possesses at least one axis (115) suitable for separating the vaned diffuser from its rigid mold by translation. Casting of a raw vaned diffuser (407) having an optional central hub (205) and, optionally, ribs on the hub (209), is disclosed in a plaster mold (305). The hub and optional ribs are machine finished from the raw vaned diffuser to yield the finished vaned diffuser (101). The method provides the high degree of dimensional accuracy, and high quality surface finish, required to produce a vaned diffuser of an efficient turbocharger.

Abstract: The present invention relates to a method of removing a gate remnant from a casting comprising the steps of: providing a gating including a casting and a gate remnant, the gate remnant including a riser and at least two in-gates, wherein the at least two in-gates are attached to the riser and to the casting; weakening one of the at least two in-gates; and applying a first force to one of the at least two in-gates, wherein the first force severs the one of the at least two in-gates and thereby urges the riser away from the casting such that the other one of the at least two in-gates is severed, thereby separating the gate remnant from the casting.

Abstract: A truss structure well suited for use as an engine strut on a commercial aircraft. The truss structure is cast as a single piece integrally formed component from a titanium alloy or another suitably lightweight, structurally strong material. The truss structure includes a plurality of integrally formed attachment structures which enable the truss structure to be secured to an element of an aircraft such as a wing. A plurality of attachment areas for an element such as an engine is also formed that allows the element (e.g. jet engine) to be secured to the truss structure. The truss structure includes a plurality of elongated rails and truss elements that are arranged to provide redundant load paths to ensure that a failure of any one truss element or elongated rail will not result in a failure of the overall truss structure to support whatever load is required.

Abstract: To prevent movement of a ceramic core in a ceramic shell for the investment casting of a turbine blade, the free end of the core has one or more pins embedded therein so that the pins project into both the core and the ceramic shell which is applied over a wax layer. After removal of the wax and firing of the shell, molten metal is cast in the space left by the wax between the core and the shell. After hardening of the metal, the outwardly projecting part of the pins are removed during the machining of the surfaces of the turbine blade blank.

Abstract: A reverse break stamp hook assembly and method for breaking a biscuit from a casting. The reverse break stamp hook assembly is mounted to an upper trim die of conventional stamping equipment, and includes a leg that hangs from a pivot attached to a mounting bracket and a counterweight arm that extends from the pivot. The hook includes an angled front portion and a catch portion. As the upper trim die moves toward a lower trim die during the downstroke, the angled front portion of the hook contacts an edge of the biscuit. The contact between the edge of the biscuit and the angled front portion of the hook causes the hook to pivot away from the biscuit until the catch portion passes below the biscuit. The counterweight causes the hook to pivot back toward the biscuit, positioning the catch portion under the biscuit. During the upstroke, the catch portion engages the bottom side of the biscuit and causes the biscuit to break from the part as the upper trim die is raised.

Abstract: An improvement in the after-cast operation of removing the casting gate from an investment casting comprising a formed locator on the gate, the formed locator being capable of locating the casting in a desired position and of being gripped to hold the casting in place while the gate is severed near the casting. An investment casting pattern and gate attached thereto, the pattern gate being distinguished by a locator formation on the gate at a location spaced from the casting pattern.

Abstract: A casting device for metallic product includes a main unit 1 having a pressurizing chamber 14 and casting cavities 16 for accommodating a metallic material M, a pressurizing unit 3 for pressurizing the metallic material M contained in the pressurizing chamber 14 to cause the metallic material to flow into the casting cavities 16 and a blade unit 4 provided between the pressurizing chamber 14 and the casting cavities 16. The blade unit 4 includes a scraper edge 41 for scraping the outer layer of the metallic material M pressurized by the pressurizing unit 3. After the end of the scraping operation for the outer layer M2 of the metallic material M, the blade unit 4 is moved by the first driving unit 51 from the scraping position A1 to a disengaging position. Thereby, the metallic material can be readily separated from the blade unit.