Abstract: A core tie having a varying cross sectional diameter, a component including such a core tie, and a method of casting a hot gas path component for a turbomachine are provided herein. In an embodiment, the core tie includes a tie member having an axial length; and a cross sectional diameter which varies along the axial length of the tie member. A variation in the cross sectional diameter of the tie member positively secures a position of the core tie relative to the core.

Abstract: A component casting apparatus includes a mold to receive a molten solid for casting a component. The mold includes a first sacrificial layer to define a housing of the component and a second sacrificial layer to form at least one core passage of the component in response to contact from the molten solid. The component casting apparatus further includes a trusset disposed against an outer surface of the second sacrificial layer and formed from metal to support the second sacrificial layer.

Abstract: A device and method for retaining the position of a core in a casting mold, such as a vehicle cylinder head casting mold. The core may be a port core, such as an exhaust port core. A plunger assembly is arranged in the mold to produce a substantially unidirectional pressing force against a supported end of the core. Due to the shape of the core and its orientation and arrangement with respect to the mold, the substantially unidirectional force exerted by the pin also creates a moment that results in an additional pressing force component that is substantially perpendicular to the direction of the pressing force exerted by the pin. This second force component presses contacting ends at the other end of the core into tight contact with an associated molding surface. Consequently, the plunger assembly produces a retention force on the core in two directions.

Abstract: A method of manufacture of a wax model of an annular bladed turbomachine stator assembly includes in succession the positioning, in a mold, of a core intended to form the impression of a cavity of a blade of the assembly, the injection of a wax in the mold, and the removal of the wax model fitted with the core from the mold. The core is manufactured in metal and is positioned such that its radially internal end is housed in the portion of the mold defining the blade including the cavity, away from the radially internal end of this portion of the mold.

Abstract: The object of the invention is to provide an apparatus for setting a core, a molding machine, and a method for setting a core where the configuration of the apparatus and the machine is simplified and the accuracy of the core-setting is high.

Abstract: These inventions provide a method and an apparatus for setting a core used in a molding apparatus that produces flaskless molds, wherein the core-setting apparatus has a simple structure and the accuracy of the positioning of the core while setting it on the lower mold is improved. The inventions comprise: moving a first carrier 52 carrying a core-handling tool 51 which is holding the core 70 toward the cope flask 2 by means of a second carrier 53 when the cope flask 2 is located at the mold-stripping mechanism 12 being lifted to a lifted position by means of a flask-rotation mechanism 13; transferring the first carrier and the core-handling tool to the cope flask which is at the lifted position; lowering the cope flask 2, the core-handling tool 51, and the first carrier 52 by means of the flask-rotation mechanism 13 so that the core 70 comes close to or contacts the lower mold; and releasing the core 70 from the core-handling tool 51 to set the core on the lower mold.

Abstract: A core-setting apparatus and a method for setting the core in a lower mold used in a molding apparatus, wherein the core-setting apparatus has a simple structure and can maintain the core in the mold in a highly accurate position. The core-setting apparatus to set a core in the lower mold while the upper and the lower mold and a match plate are separated from each other after molding the upper and lower mold in a cope and drag flask includes a handling tool having a holding device and a rotatable rod, wherein the handling tool is rotatably supported by the rod, a carrier for transferring the handling tool, wherein the carrier supports the rotatable rod and is moved to or from a location above the lower mold, and an actuator for lowering and lifting the cope flask together with the carrier and the handling tool which are located above the drag flask, the actuator being mounted on the main body of the molding apparatus.

Abstract: The disclosure relates to an industrial die cast component comprising a first side, a second side, said second side having a second side surface, an aperture opening at said second side and through said second side surface, said aperture having a respective first arcuate surface bounding a central portion of the aperture and said aperture having a respective second surface bounding a projecting portion of the aperture, said projecting portion having a closed end and an open end, said open end forming a gap in said first arcuate surface and said projecting portion closed end extending radially beyond said first arcuate surface, wherein said first arcuate surface is constructed to be engaged by a fastener.

Abstract: An apparatus and method is provided for injection molding an ophthalmic lens mold section having an optical surface and a non-optical surface opposite the optical surface. The apparatus includes a non-optical tool assembly for forming the non-optical surface of the ophthalmic lens mold section. An optical tool assembly is in opposed relation to the non-optical tool assembly and together therewith forms a mold cavity for forming the ophthalmic lens mold section. In the preferred embodiment, the optical tool assembly includes a rotatably mounted core member and an optical insert removably secured the core member. The optical insert has an optical molding surface for forming an optical surface of the ophthalmic lens mold section opposite the non-optical surface thereof. A locking mechanism having, in a preferred embodiment, a locking pin selectively movable between a first position wherein the pin allows rotation of the core member and a second position wherein the pin prevents the core member from rotation.

Abstract: A casting core for a turbine blade includes a plurality of rods extending above a shank. The rods define internal cooling channels in the airfoil of the blade, and the shank defines an inlet channel in the dovetail of the blade. A plurality of stubs are clustered together at a bulb joined to the shank and radiate outwardly to integrally join different ones of the rods for increasing strength of the core.

Abstract: The disclosure relates to an industrial die cast component comprising a first side, a second side, said second side having a second side surface, an aperture opening at said second side and through said second side surface, said aperture having a respective first accurate surface bounding a central portion of the aperture and said aperture having a respective second accurate surface bounding a projecting portion of the aperture, said projecting portion having a closed end and an open end, said open end forming a gap in said first accurate surface and said projecting portion closed end extending radially beyond said first accurate surface, wherein said first accurate surface is constructed to be engaged by a fastener.

Abstract: A turbine engine blade has an attachment root, a platform outboard of the attachment root, and an airfoil extending from the platform. The airfoil has pressure and suction sides extending between leading and trailing edges. An internal cooling passageway network includes at least one inlet in the root and a plurality of outlets along the airfoil. The passageway network includes a leading spanwise cavity fed by a first trunk. A streamwise cavity is inboard of a tip of the airfoil. A spanwise feed cavity feeds the streamwise cavity absent down-pass. A second trunk feeds the spanwise feed cavity.

Abstract: According to the prior art, through-holes in components are often introduced after the production (casting) of the component. This entails additional outlay in terms of time and equipment. The time required can be considerably shortened if a casting mold is designed in such a way that the through-hole is at least in part formed by corresponding projections being formed on the inner wall and/or the outer wall of the casting mold.

Abstract: A sacrificial core for forming an interior space of a part includes a ceramic core element and a first core element including a refractory metal element. The ceramic core element may be molded over the first core element or molded with assembly features permitting assembly with the first core element.

Abstract: A method for casting an airfoil for a turbine engine is provided. The method includes forming a casting core to define a hollow portion in the airfoil and forming a print out region at one end of the casting core. The method also includes coupling the casting core to the print out region with at least one frusto-conical member to facilitate structurally supporting the casting core.

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 device for casting a workpiece, especially a turbine blade with inner cooling, includes a casting cavity in which casting cores which produce channels that pass through the workpiece are provided. There are no poorly cooled areas present in the workpiece. To this end, the casting cores are placed in the casting cavity in such a way that they rest against each other loosely.

Abstract: Concepts for fabricating improved cores for investment casting are described. The cores are composite which include refractory metal elements and ceramic elements. The refractory metal elements are provided to enhance the mechanical properties of the core and/or to permit the fabrication of cores having shapes and geometries that could not otherwise be achieved. In one embodiment, the entire core may be made of refractory metal components. The cores may be used to investment cast gas turbine superalloy components.

Abstract: The invention relates to a device for manufacturing a metallic hollow body (1) having at least one hollow space (3, 5, 17) and a wall encompassing the hollow space, comprising an exterior casting mold which has at least one inside core (33, 35, 47) serving to form the hollow space. The exterior casting mold is separable into at least two exterior members (29A, 29B) and the inside core (33, 35, 47) is connected via at least one connecting element (53), which serves to form a through-opening (25) in the wall (23) into the hollow space (3, 5, 7), with an exterior member (29A, 29B) of the exterior casting mold.

Abstract: A mould structure for producing metal castings by solidifying molten metal, in particular for producing a light-alloy engine crank-case, which includes a plurality of cores defining a mould cavity and a primary inlet aperture for feeding the molten metal into the bottom region of the mould cavity through the walls of one of the said cores, which includes: a metal containment structure, open at the top, with a bottom wall and side walls having a plurality of reference elements which have surface portions which complement surface portions of the said cores, the said cores being assembled inside the containment structure so that they are engaged with each other and with the said reference elements, and being shaped so as to define interstices between their surfaces facing outwardly of the mould cavity and the walls of the containment structure; and at least one cover element made of a highly heat-conductive material, supported by the side walls of the containment structure and by some of the said cores and servi

Abstract: Method and apparatus for providing a plurality of locator elements on a ceramic core involves placing a ceramic core in a die cavity of die, positioning a plurality of pins in the die cavity with each pin having a locator-forming cavity on an inner end facing a surface of the core, and introducing melted wax into each locator-forming cavity to form a plurality of locator elements on the surface of the core.

Abstract: Apparatus for forming a pour hole and main sprue in an investment mold for lost wax casting. A sprue having a flared base, a base member adapted to receive the flared base of the sprue for vertically supporting the sprue, and a flask for containing investment material immersing the sprue, define the casting apparatus of the present invention. The present investment casting sprue apparatus forms a pour hole in the hardened investment material suitable for smoothly introducing liquid metals into the cavity formed by the sprue, thereby reducing the number of casting defects related to turbulent filling. This is accomplished as a result of the flared base of the sprue, which forms a gentle transition into the sprue. The current practice, by contrast, uses a sprue having a cylindrical base which is simply inserted into a hole in a finger or button formed in the supporting base member for the sprue without regard to this smooth transition.

Abstract: Apparatus for forming a pour hole and main sprue in an investment mold for lost wax casting. A sprue having a flared base, a base member adapted to receive the flared base of the sprue for vertically supporting the sprue, and a flask for containing investment material immersing the sprue, define the casting apparatus of the present invention. The present investment casting sprue apparatus forms a pour hole in the hardened investment material suitable for smoothly introducing liquid metals into the cavity formed by the sprue, thereby reducing the number of casting defects related to turbulent filling. This is accomplished as a result of the flared base of the sprue, which forms a gentle transition into the sprue. The current practice, by contrast, uses a sprue having a cylindrical base which is simply inserted into a hole in a finger or button formed in the supporting base member for the sprue without regard to this smooth transition.

Abstract: A solid high silicon cast iron elongated anode has a midpoint electrical connection keeping the connection as far as possible from the ends to combat the deleterious pencil effect. The anode is made by casting using a hollow or shell core to form a small axial hole extending from one end. The sand or foundry material of the core is removed and the wall of the hole at the blind end of the hole is at least partially finished to receive a diagonally split slug to which a lead wire is connected. Alternatively the hole is formed by a steel pipe which is left in place as a hole liner. The pipe may be supported by one or more chaplets. The slug is fastened in the blind end of the hole by a driving tool rotating a threaded headed bolt with both axial and rotational force to hold the connection in the blind end of the hole as it is secured in place. The hole is filled with a potting compound sealing the connection in the center of the solid cast iron anode.

Abstract: The invention is directed to a golf club head and, more specifically, to a putter. In addition, the invention is directed to a method of manufacturing a golf club head. The putter head includes a first body element made of a high density first material, constituting at least the heel portion, the toe portion and a major portion of the surface of the sole, and a second body element intimately linked to the first element, the second element being made of a second metallic material of lower density, the second element covering the remainder of the head including at least the central portion of the striking face thereof.

Abstract: A die cast mould apparatus having a base for supporting a mould body partially defining a mould cavity. A mould body insert is insertable in the partially defined mould cavity and may be locked in this position to complete the mould cavity. The mould body insert is mounted on a retainer which is mounted in a channel, in a support extending from the base. The retainer may be locked to the support in the channel by way of interlocking wedges on the retainer and wedge receptors in the channel walls of the support, thereby locking the insert in the position to complete the mould cavity.

Abstract: A cast abrasion resistant hollow ball is formed with a hollow ceramic core that generates no gas during the casting operation. Solid ceramic bars or supports hold the hollow ceramic core in a fixed location at the center of the cast ball during the casting process. There are no open holes or openings in the ceramic supports due to the fact that the hollow ceramic sphere is composed of an inert refractory material which eliminates any gases being generated during the pouring and solidification of the liquid metal in the casting process.

Abstract: A pressure casting system including a core having self-cleaning core prints. The core prints are spaced from the bottom wall of the pockets with which they mate, and include channels for admitting molten metal into the print-pocket space so provided.

Abstract: In a casting core for the water jacket of a cylinder block in a multicylinder, reciprocating-piston internal combustion engine, whose cylinders are arranged in line and are cast in one piece linked by cylinder webs, these webs are provided with rectangular plates of a ceramics material--preferably sintered oxide ceramics--, which are used as supports for two core halves, in which they are anchored in such a way as to present a one-piece casting core. The supports are removed during the core cleaning process, leaving passages for the cooling water.

Abstract: An automatic core setting machine having a movable mask with pockets for holding foundry cores until the mask is brought into face-to-face abutment with a mold, and a vacuum system comprising a body member integral with the pocketed mask and defining an interior suction chamber, the body member comprising a first wall having means defining a plurality of inlet ports terminating on the interior surface of the first wall in a plurality of injector nozzles, a second wall parallel to the first wall and having means defining a plurality of outlet ports terminating on the interior surface of the second wall in a plurality of ejector nozzles, each of the plurality of outlet ports being axially aligned with one of the plurality of inlet ports, and side walls rigidly connecting the first wall and the second wall and defining a space therebetween; means defining a suction opening through at least one of the side walls, the suction opening communicating with the interior suction chamber of the body member; means for con

Abstract: The pins which are used for the support of a core in a lost wax casing process are provided with caps. The caps provide sufficient surface area for encapsulation by ceramic slurry. Heat loss from the metal melt via the pins is thus obviated along with undesirable grain nucleation.

Abstract: An article is molded in a mold cavity where the article has a profiled bore extending axially therethrough which has a precisely centered small diameter bore section at one end thereof. A mold cavity is defined by lower and upper mold halves and has a cavity axis, and a core pin having a precisely centered needle-like tip section at the upper end extends upwardly from the lower mold half coaxially through the mold cavity. Its needle-like tip section extends into a precisely centered small diameter bore of a nose piece at the upper end of the mold cavity when the mold halves are closed. The nose piece can be adjusted vertically within the upper mold half to vary the distance the core pin tip extends thereinto to vary the length of the forward end of the molded article.

Abstract: An improved core is adapted to extend axially through the central portion of a mold cavity in which an airfoil or other article is formed. The core is used to form cooling passages as the airfoil is cast in the mold cavity. The core has an elongated cantilevered center section which is disposed within a main or base section. A metallic pin member extends from a free end portion of the cantilevered center section of the core to the main section of the core to hold the free end portion of the cantilevered center section against movement relative to the main section.

Abstract: A process is provided for pressure casting a piston with a crown insert and a cavity. The process comprises casting crown down in a mould and, before casting, placing in the mould means for forming a crown insert and a soluble salt core forming a cavity in the piston. The salt core is held by the crown insert means to position the salt core in the mould so preventing the salt core moving during pressure casting.

Abstract: A plurality of supporting elements for providing a separation between adjacent casting molds are interconnected by a web or band. The interconnecting element allows the supporting elements to be easily placed on a mold surface, and requires securing only selected ones of the supporting elements to the mold surface. The remainder of the supporting elements are held in place by the action of the interconnecting element.

Abstract: The method of casting a plate type recuperative heat exchange envelope that encloses a hollow space therein in a single casting operation. A sand core with a heat sensitive binder therein defines the hollow space within the envelope. The sand core is supported by end extensions and lateral protuberances which rest on the sides of a sand mold to provide a space therebetween that is subsequently filled with molten metal to comprise an envelope casting. Lateral openings through the envelope casting produced by the lateral protuberances and end openings produced by the end extensions provide passageways for venting gases produced within the sand core during the casting operation, and after completion of the casting operation the same openings in the envelope assist in the removal of the sand core therefrom. The lateral openings are subsequently plugged while the end openings are maintained open to direct the flow of fluid therethrough.

Abstract: A light alloy piston having an annular cooling passage in its head portion is prepared by a process wherein a permanent mold, preferably having a steel shell and a water cooled bottom, is filled with the molten piston alloy. Thereafter, core elements, particularly a salt core for forming the cooling passage are introduced into the molten material by means of a holder and the permanent mold is held at an elevated temperature by external heating. The permanent mold is then lowered into a water bath for a given period of time. The soluble core, which has a specific gravity lower than that of the molten light alloy, is forced into the molten material to the desired position and depth using a holding device. The holding device is withdrawn from the remaining molten material when the solidification of the molten material has proceeded to the underside of the core.