Abstract: A holding structure for a continuous casting long stopper includes a continuous casting long stopper including a shaft insertion hole formed in an upper end thereof, a protrusion insertion groove contiguous to and axially opposed to the shaft insertion hole, and a horizontal engagement groove contiguous to a lower end of the protrusion insertion groove, and a holding rod including a shaft inserted into the shaft insertion hole, the shaft having a lower end on which a radially protruding locking protrusion is formed. In the structure, after the shaft of the holding rod is inserted into the shaft insertion hole such that the locking protrusion reaches the protrusion insertion groove, the locking protrusion is caused to engage the engagement groove by rotation of either the shaft of the holding rod or the long stopper relative to the other.

Abstract: A stopper for continuous casting comprising a stopper rod and a spindle for actuating the stopper rod, wherein the stopper rod includes a joining nut integrally formed therewith, an upper end surface of the stopper rod being formed so as to be smooth, and a pin hole being provided in the upper end surface so as to prevent from rotating, while the spindle includes a gas introduction route, a male screw provided in a tip portion thereof for being engaged with the joining nut, a male screw provided in an upper portion thereof for being engaged with a fastening nut for fixing the spindle to the stopper rod, and a flange tightly adhered to the upper end surface of the stopper rod and provided with a hole, into which a pin for preventing rotation is inserted. The spindle is fixed to the stopper rod by the joining nut. The flange is fixed to the upper end surface of the stopper rod by the fastening nut so as to be hermetically sealed.

Abstract: An immersion nozzle for continuous casting includes a body having a hollow interior and an open end and a bottom, the body including a peripheral wall and having a plurality of discharge holes formed through the peripheral wall so as to communicate with the interior of the body and so as to be located near one of the ends thereof, and a partition wall formed integrally on the bottom of the body so as to partition a sectional area of the body substantially in equal parts according to the number of discharge holes so that amounts of a molten metal discharged out of the respective discharge holes are substantially equalized, the partition wall having an upper end located above the discharge holes and below a meniscus of the molten metal.

Abstract: A stopper for continuous casting comprising a stopper rod and a spindle for actuating the stopper rod, wherein the stopper rod includes a joining nut integrally formed therewith, an upper end surface of the stopper rod being formed so as to be smooth, and a pin hole being provided in the upper end surface so as to prevent from rotating, while the spindle includes a gas introduction route, a male screw provided in a tip portion thereof for being engaged with the joining nut, a male screw provided in an upper portion thereof for being engaged with a fastening nut for fixing the spindle to the stopper rod, and a flange tightly adhered to the upper end surface of the stopper rod and provided with a hole, into which a pin for preventing rotation is inserted. The spindle is fixed to the stopper rod by the joining nut. The flange is fixed to the upper end surface of the stopper rod by the fastening nut so as to be hermetically sealed.

Abstract: A sliding nozzle for a molten steel receiving vessel, which comprises: an upper nozzle (22) made of a refractory inserted vertically into a bottom wall of a molten steel receiving vessel; a fixed plate (23) made of a refractory secured horizontally and stationarily to a lower end of the upper nozzle; a horizontally and reciprocally movable sliding plate (24) made of a refractory arranged below the fixed plate; a lower nozzle (25) made of a refractory secured vertically and stationarily below the sliding plate, the lower nozzle comprising a nozzle body (27) and a metallic frame (28) fitted to a flange (27A) at an upper end of the nozzle body, the lower nozzle having a length sufficient to cause a lower end portion thereof to be immersed into molten steel in a mold; a fitting device (30) for pressing the lower nozzle (25) against the lower end of the upper nozzle (22) through the sliding nozzle (24) and the fixed plate (23); and a driving unit (26) for causing the sliding plate ( 24) to slide horizontally and r

Abstract: A pressure-casting machine that contains a delivery system, which comprises: a molten metal pouring pipe made of a refractory, having a length of at least 4 m and an outside diameter of at least 350 mm, and arranged such that an upper end thereof is attached substantially vertically from below to an opening in a bottom wall of a mold for a pressure-casting machine, and a lower end thereof extends through a lid of a closed vessel arranged below the mold and is immersed into molten metal received in a ladle arranged in the closed vessel. The molten metal pouring pipe comprises at least two pipe sections connected to each other in series and in a liquid-tight manner by means of a threaded joint, tapered surfaces provided with screw threads of which have an inclination angle within a range of from 2.0.degree. to 15.0.degree. relative to the center axis of the molten metal pouring pipe.