JPH0636969B2 - Belt-type continuous casting machine with variable width - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a belt-type continuous casting device capable of freely changing the width of a metal ribbon to be manufactured.

[Prior art] Recently, from molten metal such as molten steel, several mm to several tens of millimeters close to the final shape
A continuous casting method for directly producing a metal ribbon having only about mm has attracted attention. According to this method, the rolling process in multiple stages as in the prior art can be omitted, so that the process and equipment can be simplified. In addition, since the step of heating the material to the processing temperature between each step is essentially unnecessary, an energy saving effect can be expected. One of such continuous castings is a twin belt system.

FIG. 3 is a diagram showing an outline of this twin belt type continuous casting machine. In this continuous casting machine, the molten metal in the tundish 1 is supplied from the nozzle 2 to the casting space. This casting space is formed by partitioning opposite sides of a pair of belts 4 made of a heat resistant material such as steel running around the pulley 3 with short side molds 5 (see FIG. 4). Has been done. The molten metal poured into this casting space is cooled and solidified by the cooling box 6 and is carried out as the metal ribbon 7.

At this time, if there is a gap between the belt 4 and the short-sided mold 5, the molten metal will be inserted there, and a casting burr will be generated. Therefore, it is necessary to press the short side mold 5 against the belt 4.

A structure as shown in FIG. 4 is shown in Japanese Patent Application No. 59-218618 (Japanese Patent Laid-Open No. 61-99541) as a pressing mechanism for the short-side mold 5. In this device, the short side mold 5
Are arranged so as to be movable along the width direction of the belt 4, and short side pressing blocks 9 are arranged inside the cooling box 6 outside the short side pressing blocks 8 on both sides of the cooling box 6. The short side pressing block 9 is movable forward and backward with respect to the belt 4 by transmitting the driving force of the pushing device 11 via the rod 10. By providing a plurality of such short side pressing blocks 9 in the width direction of the cooling box 6, the width of the thin metal film 7 to be manufactured can be changed.

That is, when the metal strip 7 having the maximum width is manufactured, both sides of the casting space are partitioned by the outer short side pressing blocks 8.
At this time, the refrigerant is supplied over the entire gap between the belt 4 and the cooling box 6. When manufacturing the thin metal strip 7 having a small width, the short side mold 5 is moved to, for example, the position shown by the alternate long and short dash line in FIG. 4, and the short side pressing block 9 at that position is pressed against the belt 4. Form a casting space. Then, the coolant is supplied between the belt 4 and the cooling box 6 inside the short side pressing block 9 in the width direction of the belt 4, and the supply of the coolant to the outside gap is stopped. A plurality of ribs 12 are provided on the surface of the cooling box 6 facing the belt 4 so as to prevent the belt 4 from coming too close to the cooling box 6 due to the static pressure of the molten metal. This is for ensuring the refrigerant flow path.

By making the short-side pressing block 9 movable in this way, it becomes possible to manufacture the metal ribbon 7 having a required width by the same continuous casting apparatus.

[Problems to be solved by the invention]

When the short-side press block 9 is made movable as described above, if the press is not performed reliably, a gap is created between the short-side press block 9 and the belt 4, and the above-mentioned hot water is poured into the gap. Occurs, and casting burrs are generated. In this regard, in the pressing mechanism of FIG. 4, the short side pressing block 9
Since the length of the belt 4 in the width direction is made substantially equal to the length of the short side mold 5, it is difficult to maintain the short side mold 5 in a stable pressed state. For example, in FIG. 4, there is no problem if the short side casting mold 5 is located at a position exactly matching the short side holding block 9, but if the short side casting mold 5 is continuously moved, one of the left and right sides is moved. There may be a case where it protrudes to the outside. At this time, the short-side mold 5 is in a cantilever state, and the pressing of the short-side mold 5 against the belt 4 becomes insufficient.

Therefore, the present invention, when trying to move the short-side mold continuously, even if the short-side pressing block is not at the position where the short-side mold matches, surely pressing the short-side mold, The purpose is to prevent the formation of a gap that causes hot water between the belt and the short side mold.

[Means for solving problems]

In order to achieve the object, the belt type continuous casting device of the present invention cools and solidifies the molten metal injected into the molten metal pool part having both ends partitioned by a short side mold between a pair of belts to form a metal ribbon. In the belt-type continuous casting machine to be manufactured, the short side mold is movably arranged along the width direction of the belt, and a plurality of holding blocks for pressing the short side mold are provided in a cooling box provided on each back surface of the belt. And the length of the short side mold in the belt width direction is larger than the length of the contact surface of the pressing block in the belt width direction.

〔Example〕

Hereinafter, the features of the present invention will be specifically described by way of examples with reference to the drawings.

FIG. 1 shows a short side mold holding mechanism in the embodiment of the present invention. In FIG. 1, components corresponding to those shown in FIG. 4 are designated by the same reference numerals, and the description thereof is omitted.

A pressing mechanism is arranged between the plurality of ribs 12 provided on the surface of the cooling box 6 facing the belt 4. As in the case of FIG. 4, this pressing mechanism has a short side pressing block 9,
The rod 10 and the pushing device 11 are provided. Here, the length L of the short side mold 5 in the width direction of the belt 4 is made larger than the length 1 of the short side pressing block 9 in the width direction.

As a result, even when the center of the short side press block 9 in the width direction does not coincide with the center of the short side mold 5 in the width direction, the entire area of the short side press block 9 is used for pressing. It is also possible to press the short-side mold 5 while being bridged to the adjacent short-side pressing block 9. As described above, by utilizing the entire surface of the short-side press block 9 for pressing, the short-side mold 5 can be reliably held, and the gap caused by the biased pressing force between the short-side mold 5 and the belt 4. Are prevented from occurring.

The relationship between the lengths L and l is preferably L / l = 1.5-
Set to 2. When the length ratio L / l is in this range, the short-side mold 5 can be more reliably held down. When the length ratio L / l is less than 1.5 and the short side mold 5 is to be expanded rightward from the position of FIG. 2 (b), after the left side of the short side mold 5 is in the range of the void c. , Immediately retract the short side presser block 9c,
Refrigerant must be supplied to the void c. At this time, the contact length between the short side mold 5 and the short side pressing block 9b becomes insufficient, and the pressing force becomes unstable. On the other hand, the length ratio L / l is 2
If the short side presser block is made of a material such as copper, the short side mold 5
It is also not preferable in terms of rigidity.

FIG. 2 is a diagram for explaining the operation of this pressing mechanism. FIG. 6A shows a state in which the short side casting mold 5 is pressed by the short side holding blocks 9a and 9b to produce a wide metal ribbon. At this time, there are gaps c and d defined by the ribs 12 between the short side pressing blocks 9c and 9d and the belt 4, and the refrigerant is supplied thereto. On the other hand, the short side pressing block 9 outside the short side pressing block 9 in the belt 4 width direction
The belts a and 9b are pressed against the belt 4, and the refrigerant is not supplied thereto. Therefore, the left side of the short side mold 5 becomes the casting space, and the metal ribbon corresponding to the casting space is manufactured.

When trying to change the width of this metal ribbon to a small one,
The short side mold 5 is moved in the direction of the arrow. In the state shown in FIG. 2 (b), the short side presser block 9c is also attached to the belt 4
And is used to press the short side mold 5.
And, the gap d between the short side presser block 9d and the belt 4
Only, the refrigerant is supplied.

It should be noted that each of the short-side press blocks 9a to 9d moves back and forth as the short-side mold 5 moves, and the belt 4 to the short-side press block 9a to
The supply of the refrigerant to the space between 9d and the stop thereof can be automatically controlled based on the measurement result by measuring the position of the short side mold 5.

When it is desired to change from a narrow metal ribbon to a large metal ribbon, the operation from FIG. 2 (b) to FIG. 2 (a) is performed.

〔The invention's effect〕

As described above, in the belt-type continuous casting device of the present invention, since the belt width direction length of the short side mold is made larger than the width direction length of the short side holding block, the short side by the short side holding block The mold is securely held. Therefore, when continuously moving the short-side mold, even if the center of each short-side pressing block and the center of the short-side mold do not match, biased pressing force acts on the short-side mold. Instead, the short side mold is pressed parallel to the surface of the belt. As a result, it is possible to continuously change the short side mold, and it is possible to produce a metal ribbon having excellent shape characteristics without forming a gap that causes a water bath between the belt and the short side mold. became.

[Brief description of drawings]

FIG. 1 shows a presser mechanism according to an embodiment of the present invention.
The figure is a view for explaining the operation of the pressing mechanism, and FIG. 3 schematically shows the entire twin-belt type continuous casting apparatus to which the pressing mechanism is applied. Further, FIG. 4 shows a conventional pressing mechanism.

Claims (1)

[Claims] 1. A belt-type continuous casting machine for manufacturing a thin metal strip by cooling and solidifying a molten metal injected into a molten metal pool part having a short side mold between both ends of a pair of belts. The mold is arranged so as to be movable along the width direction of the belt, and a plurality of holding blocks for holding the short side mold are arranged in cooling boxes provided on the respective back surfaces of the belt, and the contact surface of the holding block is The belt-type continuous casting device with variable width, wherein the length of the short side mold in the belt width direction is larger than the length of the belt in the belt width direction.