A method of casting an annular member is provided. The method includes preparing a sand mold. The method further includes clamping the sand mold between at least two plates. The method further includes rotating the sand mold. The method further includes introducing molten cast material into the sand mold during rotation of the sand mold.

A cooling device (21) includes radiation thermometers (51 to 55), a plurality of nozzle parts, a plurality of electromagnetic valves (V.sub.1 to V.sub.5), and a control device (60). The radiation thermometers detect pre-cooling temperatures that are temperatures at a plurality of places on the mold before cooling water is sprayed from the plurality of nozzle parts to the mold. The control device individually sets a cooling time to each of the plurality of places on the mold based on a deviation between the pre-cooling temperature at the place on the mold and a target temperature and controls the electromagnetic valves based on the cooling times individually set to the plurality of respective places on the mold.

The invention relates to a method of producing elongate metal strands or fibres with a crucible, the method comprising the steps of; directing molten metal through a nozzle having a nozzle direction in a deposition direction at a regulated pressure difference between the inside and the outside of the crucible; depositing said molten metal from said nozzle on a rotating planar surface having an axis of rotation; entraining said molten metal in one plane via said rotating planar surface to form elongate metal strands, wherein said rotating surface is aligned at an alignment angle, to the deposition direction during the entraining of the molten metal; cooling said elongate metal strands to form solidified metal strands; and guiding said metal strands to collecting means to collect the solidified metal strands formed on the rotating planar surface.

A water-cooled centrifugal pipe casting machine includes a sector ladle tilting system, a pouring runner, a pipe mold and a pipe removing device. The pipe mold is provided to a travel system, and rotation of the pipe mold is controlled by a pipe mold rotating system. By using a servo motor driving the sector ladle tilting system, by using a parallel four-bar linkage structure tilting a sector ladle, and by using a variable frequency motor controlling the movements of a rack and a gear of a travel driving system, a constant amount of hot metal flowing out of the sector ladle per unit time can be ensured and a constant traveling speed of the centrifugal pipe casting machine are achieved. As such, uniformity of the wall thickness of the casting pipes can be ensured, the quality thereof can be improved, and materials required can be saved.

The invention relates to a method of producing elongate metal strands or fibres with a crucible, the method comprising the steps of; directing molten metal through a nozzle having a nozzle direction in a deposition direction at a regulated pressure difference between the inside and the outside of the crucible; depositing said molten metal from said nozzle on a rotating planar surface having an axis of rotation; entraining said molten metal in one plane via said rotating planar surface to form elongate metal strands, wherein said rotating surface is aligned at an alignment angle, to the deposition direction during the entraining of the molten metal; cooling said elongate metal strands to form solidified metal strands; and guiding said metal strands to collecting means to collect the solidified metal strands formed on the rotating planar surface.

A water-cooled centrifugal pipe casting machine includes a sector ladle tilting system, a pouring runner, a pipe mold and a pipe removing device. The pipe mold is provided to a travel system, and rotation of the pipe mold is controlled by a pipe mold rotating system. By using a servo motor driving the sector ladle tilting system, by using a parallel four-bar linkage structure tilting a sector ladle, and by using a variable frequency motor controlling the movements of a rack and a gear of a travel driving system, a constant amount of hot metal flowing out of the sector ladle per unit time can be ensured and a constant traveling speed of the centrifugal pipe casting machine are achieved. As such, uniformity of the wall thickness of the casting pipes can be ensured, the quality thereof can be improved, and materials required can be saved.

A water cooling apparatus for cooling centrifugal casting equipment that includes an upper mold and a lower mold rotating together includes a rotating shaft in which a first cooling passage is formed and to which a nozzle is provided at an end portion of the rotating shaft, and a collecting portion which surrounds a side surface of the lower mold and is installed apart from the lower mold. The lower mold is connected to the rotating shaft and includes a chamber separated from a mold space formed between the upper and lower molds in order to store cooling water injected to the nozzle. The lower mold includes at least one second cooling passage extended from the chamber toward an outer circumference surface direction, and the collecting portion receives the cooling water discharged through the second cooling passage.

A molten metal pouring device is configured to pour molten metal into a mold cavity formed between an upper mold and a lower mold of a centrifugal casting machine. The molten metal pouring device includes a pouring unit including an end formed with a pouring hole, through which the molten metal is poured into the mold cavity, the end of the pouring unit being inserted into a riser formed along a rotation axis of the upper mold and being drawn out of the riser as the molten metal is poured, a stopper inserted into the pouring unit to open and close the pouring hole so as to adjust the flow of the molten metal, and a base unit, to which the pouring unit is mounted, the base unit being configured to lift the pouring unit up and down.

A cooling device (21) includes radiation thermometers (51 to 55), a plurality of nozzle parts, a plurality of electromagnetic valves (V.sub.1 to V.sub.5), and a control device (60). The radiation thermometers detect pre-cooling temperatures that are temperatures at a plurality of places on the mold before cooling water is sprayed from the plurality of nozzle parts to the mold. The control device individually sets a cooling time to each of the plurality of places on the mold based on a deviation between the pre-cooling temperature at the place on the mold and a target temperature and controls the electromagnetic valves based on the cooling times individually set to the plurality of respective places on the mold.