Abstract: A part of outer circumference of an extruded article that is difficult to be cooled is selectively pre-cooled by a pre-cooler (18) and is cooled by a cooling fan (17) by forcible air-cooling and the temperature of the portion that is difficult to be cooled becomes lower than the other portion, so that the outer circumference is not cooled in an imbalanced manner during subsequent forcible air-cooling process, thereby avoiding bent of the extruded article.

Abstract: A cooling mold having first and second water cooling jackets which are provided inside the mold, a primary cooling water jetting mouth which is located at a distance of 15 to 40 mm from a meniscus of the molten metal, and a secondary cooling water jetting mouth which is located at a position with an interval of 20 to 45 mm between a contact point of a primary jet of cooling water and another contact point of a secondary jet of cooling water on an ingot.

Abstract: A cooling mold has first and second water cooling jackets provided inside the mold. A primary cooling water jetting mouth is located at a distance between 15 and 40 mm from the meniscus of the molten metal. A secondary cooling water jetting mouth is located at an interval of 20 to 45 mm between a contact point of a primary jet of cooling water and another contact point of a secondary jet of cooling water on an ingot. The primary and secondary cooling water jetting mouths are respectively set at an angle of 15 to 30 degrees and of 30 to 60 degrees relative to the ingot surface. The primary jet of cooling water from the primary mouth impinges on the molten metal cooled in the cooling mold at a distance from the meniscus to establish a transition boiling zone and a film boiling zone. The secondary jet of cooling water impinges on initial zones of the transition boiling zone and the film boiling zone to break-out a vapor film.

Abstract: A cast starting method in horizontal continuous casting, including the steps of locating an orifice plate having an orifice between a molten metal outlet of a tundish and a mold, the orifice plate being formed on its front side with a recess expanded in a range surrounding an outlet of the orifice, locating a starting block in the mold to let a rear end surface of the starting block contact a front surface of the orifice plate to define a closed space by the recess, locating a starting pin in the closed space at a position not aligned to the outlet of the orifice, letting a molten metal flow from the tundish through the orifice into the closed space, and drawing the starting block with the molten metal after solidified out of the mold.

Abstract: A horizontal continuous casting device including a mold horizontally mounted through an orifice plate on a front side of a tundish. A front portion of the orifice plate is exposed into the mold. A horizontally extending small gap is formed between an outer circumferential surface of the front portion of the orifice plate and an inner circumferential surface of the mold. A facing surface between the mold and the orifice plate is provided with an annular lubricating oil passage and a given number of radial grooves communicated from the lubricating oil passage to the gap.

Abstract: A secondary cooling device for a horizontal continuous casting apparatus, comprising (1) a support rod horizontally disposed before a tundish and above a cooling mold, (2) a holder slidably mounted on the support rod and incorporating a worm and a pair of worm gears engageable with each other, (3) an arm extending downwardly from the end of each of the worm gears, (4) half-annular shaped cooling water pipes secured onto the lower ends of the respective arms, said half-annular shaped cooling water pipes being so designed as to form an annular shape when brought together, (5) half-annular shaped wipers secured to the respective cooling water pipes on the side facing the tundish, the wipers being positioned concentrically with respect to said resulting ingot and having a inner diameter smaller than the diameter of the resulting ingot and (6) cooling water nozzles secured to the cooling water pipes on the side away from the tundish.

Abstract: The shut-off device includes (1) a stopper capable of blocking a stream of melt flowing in the guide conduit which introduces the melt from a furnace into a tundish therethrough, if the occasion arises, and (2) a receiving plate disposed below a cooling mold so as to receive a leakage melt and having a heat sensor, the heat sensor being adapted to detect the heat of the leakage melt and communicating with a converter for transmitting an operation signals to the stopper. In such a specially designed structure, if the melt breaks out of the cooling mold, the leaked melt is received by the receiving plate and its heat is detected by the heat sensor. According to the detection of the heat, corresponding electric signals are instantly transmitted from the converter to the stopper and thereby the stopper is actuated so as to block the melt flow in the guide conduit.