The present invention relates to a core for hollow product manufacture including a multilayer filling material, which may be used in forming a cooling water circulation channel through which a fluid such as cooling water may pass, and a method of manufacturing a hollow product using the core, and the core includes a pipe, having a hollow formed in the pipe and an opening formed at both ends of the pipe so that the hollow is exposed to the outside through the opening, a first support member, being disposed inside the hollow and having a space formed in the first support member, a second support member, being disposed in the space, and a melting bar, passing through the second support member in a longitudinal direction of the melting bar, wherein the melting bar melts and forms a space in the second support member when the melting bar is heated.

A method of manufacturing a hollow product using a draft angle is disclosed. A method of manufacturing a hollow product using a draft angle refers to a method of manufacturing a hollow product using a core having a draft angle. The core is formed to protrude in one direction and has an outer surface at a perimeter of a protruding portion of the core, the outer surface of the core forms a slope with respect to the one direction, and a cross-sectional area of the core decreases as the core goes toward a protruding direction. The method comprises disposing a mold to be spaced apart from the outer surface of the core, disposing a hollow tube between the core and the mold, injecting a molten metal into a space between the core and the mold, and removing the core when the molten metal is solidified and the hollow product is molded.

A method of manufacturing a hollow product using a draft angle is disclosed. A method of manufacturing a hollow product using a draft angle refers to a method of manufacturing a hollow product using a core having a draft angle. The core is formed to protrude in one direction and has an outer surface at a perimeter of a protruding portion of the core, the outer surface of the core forms a slope with respect to the one direction, and a cross-sectional area of the core decreases as the core goes toward a protruding direction. The method comprises disposing a mold to be spaced apart from the outer surface of the core, disposing a hollow tube between the core and the mold, injecting a molten metal into a space between the core and the mold, and removing the core when the molten metal is solidified and the hollow product is molded.

A hybrid casting process for structural components uses a re-usable metallic mold rather than a sand mold to produce more consistent cast components. The hybrid casting process uses a metallic mold coupled to a core mold to produce the near net shape of the cast component. Machining operations are performed on the near net shape cast component to produce a final component that meets tolerances and other specifications of the structural component.

A method for producing iron metal castings, wherein an expendable mold having a cavity for holding casting material is inserted into an opened multi-part permanent mold, the permanent mold is closed, the cavity is filled with casting material, wherein a supporting device partially protruding into the cavity is partially overcast, the expendable mold is cooled in the permanent mold after the filling, the permanent mold is opened during the cooling, after the liquidus temperature has been fallen below at the earliest, and the expendable mold is nondestructively removed from the permanent mold together with the casting, the expendable mold is further cooled together with the solidified casting while hanging on the supporting device, at least until the microstructure formation of the casting is concluded, the casting is demolded by removing the expendable mold.

Provided is a titanium casting product made of titanium alloy, the titanium casting product being produced by electron-beam remelting or plasma arc remelting, comprising: a melted and resolidified layer in a range of 1 mm or more in depth at a surface serving as a surface to be rolled, the melted and resolidified layer being obtained by adding one or more kinds of β stabilizer elements to the surface and melting and resolidifying the surface. An average value of β stabilizer element concentration in a range of within 1 mm in depth is higher than β stabilizer element concentration in a base material by, in mass %, equal to or more than 0.08 mass % and equal to or less than 1.50 mass %. As the material containing the β stabilizer element, powder, a chip, wire, or foil is used. As means for melting a surface layer, electron-beam heating and plasma arc heating are used.

A low-pressure casting device is provided with a holding furnace, a stoke, a pressure control device and a molten-metal level sensor. The holding furnace holds molten metal. The stoke supplies molten metal into a casting mold via a sprue. The pressure control device moves the molten metal in the stoke and fills the molten metal in the casting mold. The molten-metal level sensor detects a surface level of the molten-metal in the stoke. The stoke has a lower end immersed in the molten metal in the holding furnace. The low-pressure casting device is configured to correct filling of the molten metal in the casting mold in a next casting based on the height of the molten metal surface detected by the molten-metal level sensor.

A furnace for removing a molybdenum-alloy refractory metal core through sublimation comprising a retort furnace having an interior; a sublimation fixture insertable within the interior of the retort furnace, the sublimation fixture configured to receive at least one turbine blade having the molybdenum-alloy refractory metal core; a flow passage thermally coupled to the retort furnace configured to heat a fluid flowing through the flow passage and deliver the fluid to the molybdenum-alloy refractory metal core causing sublimation of the molybdenum-alloy refractory metal core.

An autoclave system comprises an autoclave vessel 210, for performing a leaching operation on sacrificial ceramic cores (not shown) and a storage vessel 220 for containing caustic leaching fluid 230. Interposed in a fluid flow path between the vessel 210 and the tank 220 is a heat exchange unit 240, comprising a body 250 containing a thermal exchange medium, in the form of water 260, and first and second thermal exchange conduits represented at 270 and 280. A thermal exchange medium inlet pipe 290a and a thermal exchange medium outlet pipe 290b are provided to the body so that the medium 260 can be replenished, preferably substantially continuously, to optimize thermal transfer efficiency.

Provided is a method for manufacturing a cooling device and a motor housing cooling device manufactured using same, the method including the steps of: making a cooling pipe and forming the cooling pipe to a shape capable of being buried in a housing body; filling the cooling pipe with a support material; making a portion divided from the housing body as a jig body so as to support the cooling pipe against the jib body in an injection mold of the housing body; locating the cooling pipe in the injection mold of the housing body in such a manner as to be supported against the jig body and injection-molding the housing body; and after the injection molding, removing the support material from the cooling pipe.