JPH0469498B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a continuous track type continuous casting machine that can reliably prevent leakage of molten metal from the sides of a mold space.

[Prior Art] A conventional example of an endless track type continuous casting machine will be explained with reference to FIG. 9. A mold space 3 is formed by vertically combining molds 2 formed by connecting a large number of block molds 1 in an endless track shape. A tundish nozzle 5 is inserted into one opening of the mold space 3 and protrudes forward from the lower part of the tundish 4. In the figure, 6 is a drive roll, 7 is an idle roll, and 8 is a slab.

In the above continuous casting machine, tundish nozzle 4
The molten metal injected into the block mold 1 is supplied from the tundish nozzle 5 to the mold space 3 formed between the upper and lower molds 2, which are being moved by the drive roll 6 and the idle roll 7, and is cooled by the block mold 1. It is solidified and taken out of the machine as a slab 8.

An example of the side dam applied to the above continuous casting machine will be explained with reference to FIG. 10. The side dam 9 is as follows.
For example, as shown in Japanese Patent Publication No. 58-23181, a endless track is formed by a large number of side dam blocks 10 through which flexible endless metal bands are inserted, and the block is wound between the front and rear rolls 11 and 12, and the upper side is inserted into both ends of the mold space 3 in the slab width direction so as to be held between the block molds 1, 1 and driven, and a plurality of rollers 13 arranged protrudingly at the bottom of the side dam 9 provide a pressing force. A applying device 14 is provided.

In the side dam 9, the lower central part of the side dam 9 is lifted upward by the pressing force applying device 14, thereby creating a wedge-shaped space between the side dam blocks 10, 10 along the protruding curve above the pressing force applying device 14, This allows the side dam block 1 along the loop of the side dam block 10 to
Cumulatively absorbs 〓 between 0 and 10, mold space 3
Adjacent side dam blocks 10 are brought into close contact with each other along the mold space 3 to prevent the molten metal in the mold space 3 from leaking to the sides.

On the other hand, in the track type continuous casting machine shown in Fig. 9, the cooling zone is only the return area of the mold 2 and is relatively short, so even when the mold 2 returns from the slab outlet side to the molten metal input side, the block mold 1 is still not cooled,
Therefore, there is a possibility that casting may not be possible.

Therefore, in recent years, the applicant of the present application has devised a continuous casting machine as shown in Figs. 5 to 8 as an endless track type continuous casting machine that has a sufficient cooling zone.

That is, a mold 2 formed by connecting a large number of block molds 1 in an endless track shape is assembled vertically to form a mold space 3, and the mold space 3 has slopes at the front and rear thereof as shown in FIG. cooling zone 15,
Three relatively long cooling zones are provided: a horizontal cooling zone 16 and a vertical cooling zone 17. Further, the mold 2 is rotated by a gear 18 attached to the drive device, and a brake can be applied to the mold 2 on the downstream side of the mold space 3 via a gear 19. The reason why the brake is applied to the mold 2 in this manner is to prevent gaps from forming between the block molds 1 and 1 in the mold space 3 and from leaking molten metal.

As shown in FIGS. 6 to 8, the block mold 1 is fixed to a carrier 20, and racks 21 with which the gears 18 and 19 mesh are attached to both sides of each carrier 20. are provided with two wheels 22 on each side.

One of the two wheels 22 on one side is pivotally supported on the carrier 20 via a shaft 23, and the other wheel 22 is attached to a groove in the carrier 20 so that it can slide in the direction of movement of the block mold 1. It is pivotally supported via a shaft 23 to an axle box 25 fitted to a shaft 24 .

The shaft 23 directly attached to the carrier 20 has a
An axle box 25 having the same structure as the axle box 25 described above is attached, and the axle box 25 fits into the groove 24 of the front or rear carrier 20 adjacent to the carrier 20, and is connected to the carrier 20 through the axle box 25. The attached shaft 23 is directly attached to the rear or front carrier 20 adjacent to the carrier 20, and the block molds 1 are connected by sequentially connecting the carriers 20 in this way. Further, the frame 26 is provided with an endless track 30, and the wheels 22 are fitted onto the endless track 30 so as to be able to roll freely.

In FIGS. 6 and 7, 27 is an electric motor for driving the mold, 28 is a brake, and 29 is a side that is inserted between the upper and lower block molds 1 and can be moved in synchronization with the block mold 1. It's Dambrock.

During casting, the gear 18 is driven by the electric motor 27.
The block mold 1 is driven through the rack 21 and the side dam block 29 is also driven together with the block mold 1, and the brake 28 drives the adjacent block molds in the mold space 3 forming part through the gear 19 and the rack 21. 1. The brakes are applied so that there is no pause, and the work is carried out. On this occasion,
Since the wheels 22 roll along the endless track 30, the mold 2 is smoothly driven.

The molten metal in the tundish 4 is supplied to the mold space 3 from the tundish nozzle 5, cooled and solidified by the block mold 1, and taken out of the machine as a slab. While moving, the mold 2 is cooled by appropriate means in each cooling zone 15, 16, 17, and then returns to the molten metal injection section.

As described above, since the continuous casting machine shown in FIGS. 6 to 8 has relatively long cooling zones 15, 16, and 17, the block mold 1 is sufficiently cooled before returning to the molten metal injection section, and therefore the casting There will be no hindrance to this.

[Problems to be Solved by the Invention] However, if the side dam block 29 of the endless track type continuous casting machine shown in Figs. 5 to 8 is structured to rotate in a vertical plane as shown in Fig. 10, Since the length of the mold of the continuous casting machine itself is long, the length of the side dam is long, and since the vertical part of the mold is long, even if a pressing force applying device as shown in FIG. It is not possible to bring the comrades into close contact with each other in the three parts of the mold space, and therefore,
There is a risk that the molten metal may leak from the sides of the mold space 3.

The present invention has been made in view of the above-mentioned circumstances, and has an object to reliably prevent leakage of molten metal from the sides of the mold space.

[Means for Solving the Problems] The present invention connects a large number of block molds to form an endless track mold, and moves the endless track molds up and down so that opposing surfaces move in the same direction. A dolly is disposed on both sides of the mold in the widthwise direction of the cast strip so as to be movable in the widthwise direction of the cast strip, and a large number of side dam blocks are connected to each other by elastic bodies on both the trolleys. The structure is such that side dams configured in an endless track shape are respectively provided so as to be able to rotate in the horizontal direction.

[Function] The side dam blocks connected in an endless track are brought into close contact with the adjacent side dam blocks by elastic bodies and rotate horizontally together with the block mold, which prevents molten metal from leaking from the sides of the mold space. is definitely prevented.

[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show an embodiment of the present invention.

A carriage 32 that can be moved in the width direction of the slab by a hydraulic cylinder 31 is installed on both sides of the mold 2 in the width direction, which is constructed by connecting a large number of block molds 1.
A frame 34 provided with a horizontal endless track 33 is disposed on the cart 32, and a large number of side dam blocks 35 are connected in a horizontal endless track shape to form a side dam 36, and each A vertical roller 37 is rotatably attached to each side dam block 35, and the vertical roller 37 is rotatably fitted into the horizontal endless track 33 so that the side dam 36 can rotate in a horizontal plane. A horizontal support roller 38 is disposed at the side dam 36, and the side dam 36 is movably supported by the horizontal support roller 38.

The details of the side dam blocks 35 will be explained with reference to FIG. 4. Each side dam block 35 is provided with a hollow hole 39 extending in the longitudinal direction of the side dam 36, and a spiral groove 40 is provided in the hollow hole 39. The coil spring 41 is inserted into the hollow hole 39 in an endless track shape, and the coil spring 41
By screwing a part of into the spiral groove 40,
Connect the side dam blocks 35 in an endless track shape,
Further, tapered portions 42 are provided on the front and rear surfaces of the side dam block 35 so that the side dam 36 can be bent. The track type continuous casting machine itself is the 5th one.
The structure is similar to that shown in FIGS. 8 to 8, and the same parts are denoted by the same reference numerals.

During casting, the carriage 3 is moved by the fluid pressure cylinder 31.
2 in the slab width direction, and insert the left and right side dam blocks 35 between the upper and lower block molds 1, 1 to make the mold space 3 a desired width, and the electric motor 27 shown in FIG. The block mold 1 is driven via the rack 21, and the side dam block 35 is synchronously driven by the frictional force with the block mold 1, and the brake 28 drives the gear 19, and the side dam blocks 35 are adjacent to each other in the mold space 3 forming part via the rack 21. The brake is applied so that there is no gap in the block mold 1, and the work is carried out.

The molten metal in the tundish 4 is supplied to the mold space 3 from the tundish nozzle 5, cooled and solidified by the block mold 1, and taken out of the machine as a slab. At this time, since adjacent portions of the side dam blocks 35 are brought into close contact with each other by the coil springs 41, leakage of molten metal to the sides of the mold space 3 can be reliably prevented. Further, since the side dam 36 rotates within a horizontal plane, its overall length may be short.

It should be noted that 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] According to the endless track type continuous casting machine of the present invention, it is possible to completely prevent leakage of molten metal from the sides of the mold space, and the length of the side dam can be shortened, thereby reducing equipment costs and operation and maintenance costs. It can also produce various excellent effects, such as being cheaper.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of one embodiment of the continuous track type continuous casting machine of the present invention, Fig. 2 is a plan view of the side dam portion of Fig. Fig. 4 is a detailed view of the side dam block used in the present invention, Fig. 5 is an explanatory view of a continuous track type casting machine with a longer cooling zone, which is an improvement over the conventional one, and Fig. 6
The figure is a view taken in the -direction arrow of Fig. 5, Fig. 7 is a view taken in the - direction arrow of Fig. 5, Fig. 8 is a detailed view of the block mold of the endless track type continuous casting machine shown in Fig. 5, and Fig. 9 1 is an explanatory diagram of a conventional endless track type continuous casting machine, and FIG. 10 is an explanatory diagram of an example of a side dam used in the endless track type continuous casting machine of FIG. In the figure, 1 is a block mold, 2 is a mold, 3 is a mold space, 8 is a slab, 32 is a trolley, 33 is a horizontal track, 35 is a side dam block, 36 is a side dam, 37 is a vertical roller, and 38 is a horizontal support. Laura, 4
1 indicates a coil spring.

Claims (1)

[Claims] 1 A large number of block slabs are connected to form an endless track-shaped mold, and 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. Carts are disposed on both sides in the width direction of the slab so that they can move in the width direction of the slab, and a number of side dam blocks are connected on both carts by elastic bodies to form a track-like side dam that moves horizontally. An endless track type continuous casting machine characterized by each being provided so as to be rotatable.