JPS5848272B2 - Mold in continuous casting equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a mold in continuous casting equipment.

As shown in FIG. 1, the mold in conventional continuous casting equipment includes a regulating frame 3 that contacts the molten metal 1 to form the molten metal 1 into a slab 2 of a predetermined shape, and a regulating frame 3 for cooling the regulating frame 3. It consists of a water cooling box 4.

The regulating frame 3 is used to promote heat dissipation of the molten metal 1, but as is well known, copper has poor wear resistance and wears out quickly due to friction with the slab 2. There is a risk of leakage of cooling water due to this, and it is expensive.

The present invention provides a mold for continuous casting equipment that solves these problems.

Hereinafter, one embodiment of the present invention will be explained based on FIG. 2 and the following figures.

That is, the small regulation frame 10 of the molten metal 1 and the small regulation frame 10
The mold is constituted by an endless belt-shaped cooling body 12 consisting of a large number of cooling boxes 11 rotatably provided below the cooling body.

The small regulating frame 10 is made of copper as before, but its height (h) is less than 1/2 of the conventional one.

13 is a water cooling box for cooling the small regulation frame 10.

The cooling body 12 is wound between a pair of sprocket wheel-shaped rotating bodies 14, and one rotating body 14 is connected to the rotating shaft 1.
The cooling body 12 is forcibly rotated in the direction of movement of the slab 2 by a drive motor (not shown) via the cooling body 5 at an appropriate speed.

Each cooling box 11 has a pipe 16 projecting from it, and the cooling box 11 and the pipe 16 constitute a so-called heat pipe.

That is, the cooling box 11 and the pipe 16 communicate with each other, have a vacuum inside, and are filled with a heat medium such as water or an organic compound.

Therefore, the heat medium in the cooling box 11 is evaporated by the heat of the molten metal 1 and enters the pipe 16, where it is water-cooled or air-cooled from the outside and condensed to release heat. Go back inside 11 and return to cooling box 1
Take away the heat of 1.

By the way, since a large number of narrow grooves 17 are formed on the inner surface of the cooling box 11, the condensed liquid spreads over the entire inner surface of the cooling box 11 due to capillary action, thereby cooling the cooling box 11 efficiently.

In the figure, 18 is a large number of heat dissipation fins protruding from the outer surface of the pipe 16, and 19 is a hinge connecting each of the cooling boxes 11.

The operation of the above configuration will be explained.

First, insert the dummy bar head (not shown in Figure 1) into the small regulating frame 10, inject the solution 1, and pull out the dummy bar downwards, so that the molten metal part in contact with the small regulating frame 10 solidifies. to form a shell 2a, and the shell 2a
Each cooling box 11 of the cooling body 12 comes into contact with the cooling body 12 .

In this state, the rotating body 14 is rotated in the direction of arrow (4) in synchronization with pinch rolls (not shown) for drawing out the slab.

Then, each cooling box 11 contacts the shell 2a from beyond the upper rotating body 14, moves downward at the same speed as this shell 2a, and separates from the shell 2a when it reaches the lower rotating body 14. .

Therefore, each cooling box 11 comes into contact with the shell 2a only half the way during one round, and does not rub against each other.

Note that the narrow grooves 17 formed on the inner surface of the cooling box 11 may be triangular grooves, square grooves, semicircular grooves, etc., and the approximate dimensions are approximately 0.25 to 0.5 mm deep and 0.5 mm wide. The angle should be around 60 to 90' when it is triangular.

According to the mold in the continuous casting equipment of the present invention described above, the endless belt-shaped cooling body surrounding the lower part of the mold can be rotated at the same speed as the slab, and the cooling body can be rotated by the action of the heat pipe. Since each of the constituent cooling boxes is cooled, the slab contact surface of the cooling body is less likely to be worn away by the slab, and the life of the cooling body can be maintained for a long time.

Furthermore, since a large number of narrow grooves are formed on the inner surface of each cooling box, the condensed liquid spreads over the entire inner surface of the cooling box due to the capillary effect, and the cooling box can be efficiently cooled.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical sectional view showing a conventional example, FIGS. 2 to 4 show an embodiment of the present invention, FIG. 2 is a front view of the main part, and FIG.
The figure is a cross-sectional view taken along the line ■--■ in FIG. 2, and FIG. 4 is a cross-sectional view of the cooling box 11 and pipe 16 that constitute the heat pipe. 1... Molten metal, 2... Slab, 2a...
...Shell, 10...Small regulation frame, 11...
...Cooling box, 12...Cooling body, 14...
...Rotating body, 16...Pipe.

Claims (1)

[Claims] 1. The mold is controlled by a small molten metal regulating frame and an endless belt-shaped cooling body consisting of a number of cooling boxes rotatably provided below the small regulating frame, and the cooling body is used to cool the slab. A driving device that rotates at an appropriate speed in the moving direction is provided, a pipe is provided protruding from each of the cooling boxes, and each cooling box and the pipe constitute a heat pipe, and a large number of thin grooves are formed on the inner surface of each cooling box. A mold in continuous casting equipment characterized by forming.