Abstract:
One embodiment includes a method to regenerate a component (10). The method includes additively manufacturing a component (10) to have voids greater than 0 percent but less than approximately 15 percent in a near finished shape. The component (10) is encased in a shell mold (22). The shell mold (22) is cured. The encased component (10) is placed in a furnace and the component (10) is melted. The component (10) is solidified in the shell mold (22). The shell mold (22) is removed from the solidified component (10).
Abstract:
A technique is provided capable of favorably preventing generation of a shrinkage cavity in solidification of molten metal poured into a casting mold, and increasing accuracy of an assembling position of a core to a mold, in casting a caliper. A caliper casting device for casting a caliper for a disc brake including a cylinder into which a piston is fitted, and a rotor housing surface that defines a space for housing a disc rotor, includes: a mold; and a core placed in the mold, the mold having a rotor housing surface forming portion that forms a part of the rotor housing surface after casting, and the core being positioned and held in the rotor housing surface forming portion during casting, and forming a part of the rotor housing surface together with the rotor housing surface forming portion after casting.
Abstract:
A method for casting an article comprises a first region and a second region. The method comprises casting an alloy in a shell, the shell having a casting core protruding from a first metal piece; and deshelling and decoring to remove the shell and core and leave the first region formed by the first piece and the second region formed by the casted alloy.
Abstract:
A method for forming an airfoil includes forming a ceramic core, forming a refractory metal core using additive manufacturing, joining the ceramic core and the refractory metal core to form a hybrid core, and casting the airfoil around the hybrid core. The ceramic core is used to define an internal cavity of the airfoil. The refractory metal core has an upstream end and a downstream end. The upstream end has a lateral thickness greater than a lateral thickness of the downstream end. The refractory metal core is used to define a trailing edge cavity within the airfoil. The trailing edge cavity is in flow communication with the internal cavity of the airfoil and trailing edge slots located on an outer surface of the airfoil near a trailing edge. This method provides for an airfoil having a trailing edge cavity of variably thickness and casting cores used for their manufacture.
Abstract:
A method for manufacturing a railcar coupler knuckle includes, before casting, positioning an external chill within a cope mold portion and a drag mold portion offset from and adjacent internal walls of a pulling face and a throat of the cope and drag mold portions, thus producing a casting with reduced micro-shrinkage in at least the throat, a high-stress section of the casting. Use of subsurface chills produces an improved surface with fewer inclusions when compared to an equivalent surface produced in a process without use of a subsurface chill. The external chill may be a cone chill of a larger size to improve cooling and solidification at and below the surface. The external chill may also be a cylindrical and/or oblong chill with a tapered design that may correspond to the internal walls of the cope and drag mold portions between the pulling face and the throat.
Abstract:
A method of manufacturing a venturi tube (10') having a certain fluid flow direction is provided. The method provides a first core member (11) in a mold. The first core member has a periphery and an end (21) of a certain size. A second core member (17) is provided in the mold upstream of the first core member. The second core member has a periphery and an end (22) with a size that is less than the certain size. At least a portion of the end of the second core member (17) is disposed adjacent to at least a portion of the end of the first core member (11) such that a step is defined between the first and second core members. Material is molded about the peripheries of the first and second core members such that the peripheries define a stepped fluid flow surface of a venturi tube, and so that any resulting flash occurs only in the certain flow direction.
Abstract:
A mold tool includes a slider core, which is movable about a first axis, an auxiliary slider core, which is mounted in the slider core and movable about a second axis that isn't parallel to the first axis, and an auxiliary slider core transport that is movably coupled to both the slider core and the auxiliary slider core. Movement of the auxiliary slider core transport in a direction parallel to the second axis and toward the slider core extends a forming portion from the slider core. A method of forming a casting is also provided.
Abstract:
Vorliegende Erfindung beschreibt ein Metallgussverfahren und ein Kunststoffspritzgussverfahren, bei dem ein Einlegeteil in einer Materialschmelze derart umgossen wird, ohne dass Materialschmelze in das Innere des Einlegeteils eindringt. Bei der Nutzung eines Drahtgewindeeinsatzes als Einlegeteil hat dies den Vorteil, dass beispielsweise in einem Aluminiumgussteil bereits im Rahmen des Gießvorgangs Gewindelöcher hergestellt werden können. Zu diesem Zweck offenbart vorliegende Erfindung die passende Gussform, das Einlegeteil sowie das Gussverfahren.
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.