JPS62207539A - Nozzle fixing method for shifting mold type continuous caster - Google Patents

Abstract

PURPOSE:To prevent breakage of a nozzle part by contact or vibration of block molds and to enable controlling of a gap of the nozzle part so as to minimize by fixing flexibly the tundish nozzle to a tundish in a shifting mold type continuous caster. CONSTITUTION:The tundish nozzle 7 is fixed flexibly through a heat resistant porous cushioning material 6, such as ceramic fiber, etc., at a spout 5 of the tundish 4 arranged at one side inlet of the mold space 3, and the nozzle 7 is inserted with necessary gap to the mold space 3. In this way, even if the upper or the lower block mold 1 is brought into contact with the nozzle 7, an impact at the time of contacting with the block mold 1 is absorbed into the heat resistant porous cushioning material 6, and the nozzle 7 is prevented from breakage by only a little change of its direction.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a nozzle fixing method for a mold type continuous casting machine in which the tundish nozzle is made flexible and the gap at the tip of the nozzle can be easily managed.

[Prior Art] Generally, as shown in Fig. 2, a moving mold type continuous casting machine forms a mold by connecting a large number of block molds a in an endless track.
A mold space C is created by combining the molds vertically, a tundish nozzle d is inserted into one opening in the mold space C, and molten metal e is supplied from the tundish nozzle d,
Further, casting is performed continuously by moving the mold and the solidified slab f toward the other open end.

[Problems to be Solved by the Invention] In order to prevent molten metal leakage at the insertion part of the tundish nozzle d, it is necessary to make the gap as small as possible, but the tundish nozzle d is made of a heat-resistant material such as ceramics. Since the nozzle is firmly fixed to the tundish nozzle e, the vibration caused by the movement of the heavy mold nozzle eliminates the gap, and the mold comes into contact with the tundish nozzle d and is likely to be damaged. Furthermore, since there are variations in the accuracy of each block mold a of the mold, it has been difficult to manage the gap.

Therefore, if the moving speed of the mold is slow, the static pressure of the molten metal will cause the molten metal to enter the gap between the tundish nozzle d and the mold, causing triple point problems and nozzle damage due to insertion.
Problems such as block mold malfunction may occur.

[Means for Solving the Problems] In order to solve the above-mentioned conventional problems, the present invention uses a continuous track mold in which a large number of block molds are connected and wound around rolls separated by a required interval. The endless track-shaped molds are arranged one above the other so that their opposing surfaces move in the same direction to form a mold space, and the molten metal is supplied through a tundish nozzle inserted into the mold space to form a block. In moving mold type continuous casting in which molten metal is cooled and solidified using a mold to cast slabs, the tundish nozzle is flexibly fixed to the tundish.

[Function] Since the tundish nozzle is flexibly fixed to the tundish, it will not be damaged even if the block mold comes into contact with the tundish nozzle or is subjected to vibration during movement of the block mold. The gap between the nozzle parts can be managed to a minimum.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an example of an apparatus used for carrying out the present invention, in which an endless track-shaped mold 2 formed by connecting a large number of block molds 1 and winding them around rolls spaced apart from each other is placed in the opposite direction of the molds 2. A heat-resistant porous buffer material such as ceramic fiber is placed in the pouring spout 5 of the tundish 4 installed at one entrance of the mold space 3, which is arranged one above the other so that the surfaces thereof move in the same direction to form a mold space 3. 6 to flexibly fix the tundish nozzle 1 to the tundish nozzle 7.
is inserted into the mold space 3 with a required gap.

Therefore, since the tundish nozzle 7 is flexibly fixed via the heat-resistant porous buffer material 6, even if either the upper or lower block mold 1 contacts the tundish nozzle 7, the contact between the block mold 1 The impact is absorbed by the heat-resistant porous buffer material 6, and the direction of the tundish nozzle 7 changes slightly, but the tundish nozzle 7 is not damaged.

Therefore, the gap between the tundish nozzle 7 and the block mold 1 can be reduced, and the gap can be easily managed.

It should be noted that the nozzle fixing method for a moving mold type continuous casting machine of the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As explained above, according to the present invention, since the tundish nozzle is flexibly fixed to the tundish,
Even if the block mold comes into contact with the tundish nozzle, the tundish nozzle will not be damaged, and various excellent effects such as ease of gap management of the nozzle portion will be exhibited.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an example of an apparatus used to carry out the method of the present invention, and FIG. 2 is an explanatory diagram showing an example of a conventional moving mold type continuous casting machine. 1 is a block mold, 2 is a mold, 3 is a mold space, 4 is a tundish, 6 is a heat-resistant porous buffer material, and 7 is a tundish nozzle.

Claims (1)

[Claims] 1) A large number of block molds are connected and wound around rolls separated by a required interval to form an endless track mold, and the endless track molds are arranged one above the other so that their opposing surfaces move in the same direction. In a moving mold type continuous casting machine that forms a mold space, supplies molten metal through a tundish nozzle inserted into the mold space, cools and solidifies the molten metal using a block mold, and casts a slab, the tundish nozzle A method for fixing a nozzle of a moving mold type continuous casting machine, which is characterized in that the nozzle is flexibly fixed to a tundish.