A metallic article can include a cast metallic body and at least one metallic element. The cast metallic body defines at least one first space. The least one metallic element is received in the cast metallic body and seamless with the cast metallic body. The at least one metallic element is exposed from the at least one first space. A heat conductivity of the cast metallic body is lower than that of the at least one metallic element. The present disclosure further provides a method for manufacturing metallic article.

A multi-cylinder head casting device includes a casting mold and a port core. The casting mold includes dies that define a cavity corresponding to an outer shape of a cylinder head. The port core includes body parts for forming the ports, and a base part connecting the body parts. A lower die has intake and exhaust hole formation surfaces on the combustion chamber side of the port, and a port core support surface corresponding to the mounting surface of the cylinder head. Side dies have a port core pressing surface that faces the port core support surface. The port core is supported inside the cavity by distal ends of the body parts contacting the air intake and exhaust hole formation surfaces. A lower surface of the base part contacts the port core support surface, and an upper surface of the base part contacts the port core pressing surface.

A method of forming a component having an internal passage defined therein includes selectively positioning a lattice structure at least partially within a cavity of a mold. The lattice structure is formed from a first material, and a core is positioned in a channel defined through the lattice structure, such that at least a portion of the core extends within the cavity. The method also includes introducing a component material in a molten state into the cavity, such that the component material in the molten state at least partially absorbs the first material from the lattice structure. The method further includes cooling the component material in the cavity to form the component, wherein at least the portion of the core defines the internal passage within the component.

A core for an airfoil casting, including: a cantilevered core section; and a boss extending from the cantilevered core section to an outer profile of the core.

The present disclosure generally relates to methods and apparatuses for forming cast parts having cast in features aligned with a casting core. The part is cast around a casting core within a casting shell. The casting core has a first feature that creates a corresponding second feature of the cast part. The casting core includes a third alignment feature that creates a corresponding fourth feature of the cast part spaced apart from the second feature of the cast part. A machining tool is aligned with the second feature of the cast part based on the fourth feature of the cast part. The machining tools machines the cast part to create the at least one passageway aligned with the second feature.

A mold assembly for use in forming a component having an internal passage defined therein is provided. The component is formed from a component material. The mold assembly includes a mold that defines a mold cavity therein. The mold assembly also includes a lattice structure selectively positioned at least partially within the mold cavity. The lattice structure is formed from a first material that has a selectively altered composition in at least one region of the lattice structure. A channel is defined through the lattice structure, and a core is positioned in the channel such that at least a portion of the core extends within the mold cavity and defines the internal passage when the component is formed in the mold assembly.

An airfoil includes leading and trailing edges; first and second sides extending from the leading edge to the trailing edge, each side having an exterior surface; a core passage located between the first and second sides and the leading and trailing edges; and a wall structure located between the core passage and the exterior surface of the first side. The wall structure includes a plurality of cooling fluid inlets communicating with the core passage for receiving cooling fluid from the core passage, a plurality of cooling fluid outlets on the exterior surface of the first side for expelling cooling fluid and forming a cooling film along the exterior surface of the first side, and a plurality of cooling passages communicating with the plurality of cooling fluid inlets and the plurality of cooling fluid outlets. At least a portion of one cooling passage extends between adjacent cooling fluid outlets.

A method locates and maintains a core in fixed space relationship within the interior of a shell mold. The method provides at least one pin extending into the core with at least one axial end of the pin protruding from the core. A wax pattern having an outer surface is formed by encasing the core and at least one protruding axial end of the pin in wax such that at least one protruding axial end of the pin terminates at the outer surface of the wax pattern. A shell mold is formed around the wax pattern such that, upon removal of the wax pattern, and in a subsequent casting process for production of hollow metal components, at least one protruding axial end of the pin abuts the shell mold, thus fixing the pin and maintaining a position of the core relative to the mold. The protruding axial end of the pin has an enlarged head.

A method locates and maintains a core in fixed space relationship within the interior of a shell mould. The method provides at least one pin extending into the core with at least one axial end of the pin protruding from the core. A wax pattern having an outer surface is formed by encasing the core and at least one protruding axial end of the pin in wax such that at least one protruding axial end of the pin terminates at the outer surface of the wax pattern. A shell mould is formed around the wax pattern such that, upon removal of the wax pattern, and in a subsequent casting process for production of hollow metal components, at least one protruding axial end of the pin abuts the shell mould, thus fixing the pin and maintaining a position of the core relative to the mould. The protruding axial end of the pin has an enlarged head.

A core grasping apparatus according to the present disclosure grasps a core including a core main body and a core print provided at one end of the core main body. The core grasping apparatus includes: a first holding device and a second holding device respectively including expandable and contractible first and second holding parts; and a turning suppression part configured to suppress the core from turning upon the core print being grasped by the first holding device and the second holding device. The first holding device and the second holding device grasp the core print by respectively expanding the first holding part and the second holding part, and the turning suppression part applies a force that suppresses a turning moment acting on the core to the core print.