JPS60234744A - Continuous casting device for thin sheet - Google Patents

Abstract

PURPOSE:To cast continuously a thin sheet having good quality by combining stationary and movable side seals to provide side sealing so that sticking of the solidified material to the side seals and the leakage of the molten metal from the sides can be prevented. CONSTITUTION:The molten metal 12 is poured into a pool 10 formed of the fixed side seals 2 and barrel seals 3 and the molten metal 12 is cooled by internally cooled rolls 1, by which a thin sheet 13 is continuously cast. The movable side seals 5 are inserted into the guide grooves 4 of the seals 2 disposed on both sides of said rolls 1 and move in the casting direction of the sheet 13 at the same speed as the casting speed. The leakage of the molten metal from the side seals 2 is thus prevented and the solidified deposits are not formed to the seals 5 and therefore the thin sheet having good quality is continuously cast.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a thin plate continuous casting apparatus that prevents solidified matter from adhering to side seals and prevents melt from leaking from the sides.

[Conventional technology]

In recent years, a technique for directly casting thin plates from molten metal has been proposed, and various continuous casting apparatuses such as a twin roll type, a twin belt type, and a twin caterpillar type are being put into practical use.

For example, in the case of a twin-roll continuous casting machine, internal cooling rolls (,
), barrel seal (b) and side seal (C)
to form a pool (d) on the internal cooling roll (α),
A thin plate (c) is cast while cooling the molten metal (1) in the pool (d) with an internal cooling roll (a).

However, since the side seal (1) is fixed and has a reinforced frame lined with refractory material, the molten metal (1) in contact with the side seal (c) is easily cooled by the atmosphere, and the side seal (1) is easily cooled by the atmosphere. ) to solidified or semi-solidified deposits (g
) increases, and eventually falls off into the gear G and is incorporated into the slab, resulting in discontinuities in the slab, causing plate breakage, large variations in plate thickness, or side seals ( , ) have disadvantages such as increased wear.

Therefore, as shown in FIGS. 2 and 5, there is a system in which the fixed type side seal (C) is replaced with a caterpillar or belt type all-sided movable side seal (A).

However, since the full-side movable side seal (h) has a structure in which the upper and lower rollers (i) and (j) are rotated to feed endless caterpillars, etc., the adhesion with the side surface of the internal cooling roll (α) is poor. It is difficult to prevent hot water from leaking from the side.

[Problem that the invention seeks to solve]

In view of the above-mentioned conventional situation, it is an object of the present invention to provide a thin plate continuous casting apparatus that can prevent solidified matter from adhering to the side seals and prevent hot water from leaking from the sides.

[Failure to solve the problem]

The present invention is an apparatus that continuously casts thin plates by drawing out the molten metal in a pool formed by fixed side seals and a barrel seal while cooling it. By disposing movable side seals in the respective guide grooves so as to be movable in the casting direction, it is possible to prevent solidified matter from adhering to the side seals and to prevent melt leakage from the sides. The present invention relates to a continuous thin plate casting apparatus that prevents the above.

〔Example〕

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

FIG. 4 to FIG. 6 show an embodiment of the present invention.
1) (1) is an internal cooling roll, (2) is a fixed side seal, and (3) is a barrel seal, and the inner surface of each of the fixed side seals (2) is provided with a guide groove (0 gap width) and a wider width ( 4) are provided in the vertical direction so as to overlap with the gap G, and a movable side seal (5) having approximately the same width as the guide groove (4) is inserted into each of the guide grooves (4). The movable side seal (5) is endless and the upper drive roller (
6) and a lower idler roller (7), and the upper drive roller (6) is driven by a motor (
9) Rotate the movable side seal (5) in the pool α0 so that it moves downward. In the figure, 0
υ is the bearing, (2) is the molten metal, and (to) is the thin plate.

With the above configuration, while pouring molten metal through the nozzle of the tundish, the internal cooling roll (1) is rotated counterclockwise on the right side and clockwise on the left side in Fig. 4 at a constant speed. The molten metal (2) in the pool α0 is cooled and thin plates α are continuously cast out from the gap G. At this time, fixed side seals (2) are installed on both sides of both internal cooling rolls (1).
is installed, so no hot water leaks from the side.

Furthermore, the movable side seal (5) inserted into the guide groove (4) of both fixed side seals (2) is wider than the gap G and moves in the casting direction of the thin plate a3 at approximately the same speed as the casting speed. Therefore, solidified or semi-solidified deposits are not formed on the movable side seal (5), or they are cast out while they are very small, so there is almost no plate breakage or plate thickness variation in the thin plate (2), resulting in good quality. Can continuously cast thin plates.

The thin plate continuous casting apparatus of the present invention is not limited to the above-mentioned embodiments, but can also be applied to a twin belt type as shown in Fig. 7 or a twin caterpillar type as shown in Fig. 8. Of course, various modifications may be made without departing from the spirit of the present invention.

〔Effect of the invention〕

As described above, according to the thin plate continuous casting apparatus of the present invention,
Since the side seal is made by combining a fixed side seal and a movable side seal, the formation of solidified or semi-solidified deposits on the side seal can be greatly reduced, preventing plate breakage and plate thickness fluctuation, and further improving the side seal. Since it is possible to prevent hot water from leaking from the mold, it exhibits various excellent effects such as being able to continuously cast thin sheets of good quality.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of an example of a conventional fixed side seal type thin plate continuous casting machine, Fig. 2 is an explanatory diagram of a conventional all side movable seal type thin plate continuous casting machine, and Fig. 3 is an explanatory diagram of an example of a conventional thin plate continuous casting machine with movable side seals. 4 is an explanatory diagram of an embodiment of the thin plate continuous casting apparatus of the present invention, FIG. 5 is a view as viewed from the ■-■ direction of FIG. 4, and FIG. 6 is a fixed side view in FIG. 4. A perspective view of a seal and a movable side seal, FIG. 7 is an explanatory diagram of another embodiment of the continuous thin plate casting apparatus of the present invention, and FIG. 8 is an explanatory diagram of still another embodiment of the continuous thin plate casting apparatus of the present invention. be. (1) is an internal cooling roll, (2) is a fixed side seal,
(4) is a guide groove, (5) is a movable side seal, (6)
(7) is a drive roller, (7) is an idler roller, (a) is a molten metal, and σ is a thin plate. Patent applicant Ishikawajima-Harima Heavy Industries Co., Ltd.:, J゛-nee i 1・-・j,・:1〕j Figure 2 Figure 3 Figure 6 Figure 7 Figure 8 @

Claims (1)

[Claims] 1) In a device that continuously casts thin plates by cooling and drawing out the molten metal in a pool formed by fixed side seals and barrel seals, guide grooves are cast into thin plates on the inner surfaces of the pools of both fixed side seals. 1. A thin plate continuous casting apparatus characterized in that movable side seals are disposed in each guide groove so as to be movable in the casting direction.