JPH09308947A - Width change device for continuous casting mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend the change range of long side width of a mold in a limited strand interval by dividing mold supporting frame in the existing two-strand slab continuous caster into the width direction of the cast slab, interposing an expanding devices in the dividing parts and making shiftable of the mold in the long side direction of the cast slab. SOLUTION: The mold supporting frame 4 arranged to face oppositely with the center line 11 of the continuous caster between, is divided in the width direction of the cast slab and the expanding devices 5 composed of a jack or a cylinder, etc., are set in the divided parts. Then, this frame is made movable in the width direction of the long side 1 of the mold under condition of fitting the conventional jacks or the cylinders 3 for moving the short sides 9. By this constitution, the casting width of the cast slab can be changed in the wide range without changing the distance from the strand center to the center of the continuous caster. Further, four pieces of the expanding devices 5 are wholly made equal to keep the strand center to the constant, and it is desirable to set wheels, etc., so as to smoothly shift the supporting frames of the short sides of the mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a width changing device for a continuous casting mold.

[0002]

2. Description of the Related Art An outline of a conventional mold width changing device is shown in FIGS. 3 is a plan view in which the width of the mold is maximized, and FIG. 4 is a plan view in which the width of the mold is minimized. The jack or cylinder 3 fixed to the mold support frame 4 expands and contracts to move the short side mold 2 of the mold to change the width of the mold. Each of the long-side mold 1 and the short-side mold 2 of the mold has a structure in which a cooling box 8 is provided on the back surface of a copper plate 9.

[0003]

In a continuous casting machine having two strands, the mold support frame 4 cannot be expanded because there are molds on the left and right with the center 11 of the continuous casting machine as the axis of symmetry. Therefore, if the stroke of the jack or cylinder 3 attached to the mold support frame 4 for moving the short-side mold 2 is increased, the maximum slab width is restricted. In other words, when trying to set a wide casting width from the ridge width to the wide width, if it is adjusted to the wide width, it is necessary to shorten the overall length of the jack or the cylinder, and the width adjustment range becomes rather small. If combined, the total length of the jack or cylinder becomes long, and it is not possible to deal with wide widths.

This is because the distance between the center of the strand and the center of the continuous casting machine is limited, and this problem can be solved by increasing this distance. If the equipment is modified, it will be a big work and difficult. It is an object of the present invention to provide a technique for expanding the range of changing the width of a slab of a slab continuous casting machine having two strands by a simple means.

[0005]

DISCLOSURE OF THE INVENTION The present invention makes it possible to produce a slab slab having a wide width from a ridge width to a wide width in a slab continuous casting machine having a limited strand interval. The present invention realizes a wide range of casting width changes by expanding and contracting in the width direction the mold support frame itself that fixes the jack or cylinder for moving the short piece without changing the distance from the center of the strand to the center of the continuous casting machine. It was done.

That is, according to the present invention, in a slab continuous casting machine having two strands, the mold supporting frame is divided in the width direction of the slab, and an expanding / contracting device is interposed in the divided portion to adjust the moving range of the short side of the mold. It is a device for changing the width of a mold for continuous casting, which is characterized by being enlarged.

[0007]

1 and 2 are plan views of a mold width changing device according to the present invention. FIG. 1 shows the maximum width of the mold, and FIG. 2 shows the minimum width. According to the present invention, the conventional mold support frame 4 is divided in the width direction of the slab, and the expansion / contraction device 5 including a jack or a cylinder is installed in the divided portion. Then, even with the same distance from the center of the strand to the center of the continuous casting machine and the same jack or cylinder as in the conventional case, a wider range of casting width (in this case, ridge width) can be realized. FIG. 2 shows a state in which the mold support frame 4 is moved in the direction of arrow 6 by contracting the expansion / contraction device 5.

In the embodiment, since the cooling box 8 of the long side mold 1 and the mold supporting frame 4 are fixed to each other by the fixing member 7, the expansion / contraction device 5 is placed outside the fixing member 7 of the cooling box 8 of the long side mold 1. Installed in. In order to keep the center of the strands at a fixed position, all of the expansion / contraction devices 5 are usually the same, and the number is four per strand. Further, in the embodiment, the mold support frame on the short side moves, but it is more preferable to install wheels or the like in order to make the operation smooth.

As a steel type, medium carbon material, low carbon material, and ultra low carbon material are cast, and the slab size is 215 mm (thickness) × 1600 to 1600.
Slab continuous casting machine with 2400 mm (width) (casting speed: v
_c = 0.95 m / min, specific water amount: 1.2 liter / k
g) was improved as shown in FIG. Conventionally, the adjustment range of the casting width was 1.6 to 2.4 m, but it can be adjusted to 1.0 to 2.4 m.

[0010]

According to the present invention, it is possible to expand the range of movement of the short side of the two-strand continuous casting mold without significantly changing the equipment.

[Brief description of drawings]

FIG. 1 is a plan view of a width changing device for a continuous casting mold according to an embodiment.

FIG. 2 is a plan view of a width changing device for a continuous casting mold according to an embodiment.

FIG. 3 is a plan view of a conventional width change device for a continuous casting mold.

FIG. 4 is a plan view of a width changing device for a continuous casting mold according to a conventional example.

[Explanation of symbols]

 1 long side mold 2 short side mold 3 jack or cylinder 4 mold support frame 5 expansion / contraction device 6 arrow 7 fixing member 8 cooling box 9 copper plate 11 center of continuous casting machine

Claims (1)

[Claims] 1. In a slab continuous casting machine having two strands, a mold supporting frame is divided in the width direction of the slab,
An apparatus for changing the width of a mold for continuous casting, characterized in that an expansion device is interposed in the divided portion to expand a moving range of the short side of the mold.