JPH0478385B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Objective of the Invention) (1) Field of Industrial Application The present invention relates to an improvement of a belt-type continuous metal plate casting apparatus.

(2) Prior art Fig. 3 and Fig. 4 show an example of the conventional technology of a belt-type continuous metal plate casting device. The belts 2, 2 are formed of endless steel plates with a thickness of 1 to 2 mm (the width is appropriately set according to the width of the metal plate (slab) to be cast), and each belt is made of a plurality of steel plates (in the illustrated example, 3) It is stretched around pulley 3. 4 is a tundish for temporarily storing molten steel; 5 is a nozzle of the tundish 4; 6 is the pair of endless belts 2;
A plurality of pairs (in the illustrated example, 6
The back-up rolls 6 are connected to the molten steel pressure between the opposing endless belts 2 (because there is molten steel injected from the nozzle 5 of the tundish 4 between the endless belts 2), the back-up rolls 6 are The static pressure corresponding to that is applied to the opposing endless belts 2). Reference numeral 7 indicates a plurality of pairs of spray nozzles (5 pairs in the illustrated example) arranged between the backup rolls 6 as shown in the figure, and these spray nozzles 7 are connected to a cooling water source (not shown), A spray 8 is applied to the back surface of the belt 2 to cool the molten steel indirectly, and the molten steel is solidified to form the slab 1. Note that 3' is a pinch roll for drawing out the slab. In FIG. 4, 9, 9 slides relative to the endless belts 2, 2 between opposite ends of the endless belts 2, 2 over the entire length of the opposing surfaces of the endless belts 2, 2. A pair of side blocks (closing members) fixed as possible, and a space (mold) surrounded by the inner surfaces of the pair of side blocks 9, 9 and a pair of opposing endless belts 2, 2, The molten steel in the tundish 4 flows into the nozzle 5.
It is designed to be continuously injected through the
The molten steel injected into the space is indirectly cooled by the spray 8 from the spray nozzle 7 via the endless belt 2 to form a solidified shell, and finally becomes the slab 1, which is then removed by the drawing pinch. It is adapted to be pulled out at a predetermined speed by a roll 3'. Reference numeral 10 denotes cooling water passages provided in the side blocks 9, and the cooling water flowing through the passages 10 cools the side blocks 9 and indirectly cools the slab 1.
The sides of the liquid are cooled and solidified.
Reference numeral 11 denotes a presser block that has the role of pressing both ends of the endless belts 2, 2 against the side blocks 9;
As shown in the figure, the holding block 11 is elastically supported by a fixed portion, and is adapted to slidably press both ends of the endless belts 2, 2 toward the side block 9. Then point pulley 3 with the arrow (first
), the pair of endless belts 2, 2 are rotated in accordance with the amount of molten metal poured from the tundish 4 to run synchronously, and
The molten steel poured into the space (mold) surrounded by the pair of side blocks 9 and 9 is indirectly cooled and solidified by the spray 8 from the spray nozzle 7, thereby continuously forming the thin slab 1. It is now being cast. Note that 1' in the figure indicates the upper surface of the molten steel in the mold, that is, the meniscus.

In the above-mentioned conventional belt-type continuous metal plate casting machine,
Since the pair of side blocks 9, 9 are fixed, the following drawbacks arise.

(i) Hot water is poured into the gap between the endless belt and the side block, causing damage to the side block due to so-called burrs.

(ii) When the burr adheres to the side block, the surface of the slab is broken by the burr, causing a breakout phenomenon of the slab.

(iii) As the casting speed increases, the sliding resistance between the slab and the side block increases, causing breakout, so there is a limit to the casting speed.

(3) Problems to be Solved by the Invention The present invention aims to overcome the drawbacks of the above-mentioned conventional techniques, and in particular to realize a belt-type continuous metal sheet casting apparatus capable of high-speed casting of thick plate slabs. This is the problem that they are trying to solve.

(B) (Structure of the Invention) (1) Means for Solving the Problems The present invention is directed to a vertical surface of a predetermined length that is suspended over a plurality of pulleys, driven by a drive source in a predetermined direction at a predetermined speed, and that faces each other. and a pair of closing members that are elastically pressed against both ends of opposing vertical surfaces of the same pair of endless belts and close both sides of the opposing vertical surfaces. In the type metal plate continuous casting equipment,
The pair of closing members are constituted by a pair of short-side endless belts that are driven by a drive source in the same direction synchronously with the pair of endless belts, and each of the short-side endless belts has a plurality of cooling water distribution grooves. A means for solving the problem is a belt-type metal sheet continuous casting apparatus characterized by having a back rib and flexible membranes bonded to both end surfaces of the back rib.

(2) Effect The device of the present invention has the above configuration as a gist,
The closing member that listens to both ends of the opposing vertical surfaces of a pair of endless belts is formed by a pair of short-side endless belts, and the pair of endless belts is synchronized with the other pair of endless belts. Since they are both driven in the same direction, no sliding phenomenon occurs between the slab and the pair of endless belts forming the closing member, as in the conventional example. Further, even if a hot water splash occurs at the contact portion of both endless belts, the burr can be pulled out as it is.

(3) Examples Hereinafter, the present invention will be specifically explained using examples shown in FIGS. 1 and 2. The present invention differs from the conventional belt-type metal plate continuous casting apparatus in that the construction and operation of the members are the same as in the conventional belt-type metal plate continuous casting apparatus, except that a pair of short-side endless belts 12 are used in place of the pair of side blocks 9, 9. Since they are exactly the same as those described above, explanations of these members will be omitted.

In FIG. 1, reference numeral 12 denotes an endless belt on the short side, and both ends of ribs 13 are glued to the back of the endless belt 12 at equal intervals, and between the back of the endless belt 12 on the short side and the ribs 13. A cooling water circulation groove 16 is formed in the. (See Figure 2)
The short-side endless belt 12 has its upper and lower ends wrapped around guide rolls 15 to form an endless belt. (However, only the lower end is shown in the figure.) The short side endless belt 12 is made of a material having the same material and thickness as the endless belt 2, and its width and the length of the upper and lower vertical planes are ,
A desired mold is formed in a space that is set to have the same dimensions as the side block 9 and is surrounded by the vertical surfaces of the pair of short-side endless belts 12 and the vertical surfaces of the pair of opposing endless belts 2. It is becoming more and more common. 14 is a flexible membrane made of materials such as synthetic rubber and heat-resistant plastic;
The flexible membrane 14 is adhered to both end surfaces of the short-side endless belt 12 and to both end surfaces of the ribs 13. (However, in the figure, only one end surface is shown.) This flexible film 14 is sprayed onto the back side of the short side endless belt 12 by a cooling water injection device (not shown), and the short side endless belt It has the role of preventing the cooling water for cooling 12 from entering the mold side (molten steel side).

The pair of short-side endless belts 12 having the above configuration are as follows:
It is driven by a drive source (not shown) and runs in the same direction synchronously with the pair of endless belts 2 while being guided by guide rolls 15. In this case, the pair of short side endless Both end portions of the opposing vertical surfaces of the belt 12 are pressed against both end portions of the opposing vertical surfaces of the pair of endless belts 2 by presser blocks 11 to form a mold between the opposing vertical surfaces. It's becoming like that.

One embodiment of the device of the present invention is configured as described above, and when the device starts operating, the pair of endless belts 2 and the pair of short-side endless belts 12 synchronously move in the same direction. Although it runs,
At the same time, molten steel is continuously supplied from the nozzle 5 of the tundish 4 into the mold formed between the opposing vertical surfaces of the endless belts 2 and 12. The molten steel is indirectly cooled by spray from a spray nozzle to form a solidified shell, and finally becomes a slab 1 and is pulled out at a predetermined speed by a drawing pinch roll 3'. In this case, since the pair of short-side endless belts 12 move synchronously and in the same direction as the pair of endless belts 2, a sliding phenomenon occurs between the pair of short-side endless belts 12 and the slab 1. It doesn't happen. Therefore, damage to the short-side endless belt 12 and breakout of the slab do not occur. Further, even if, for example, a hot water drop occurs at the contact portion between the endless belt 2 and the short-side endless belt 12, the burr is pulled out together with the short-side endless belt 12 while remaining intact. Furthermore, the rib 1 attached to the back side of the short side endless belt 12
3 imparts sufficient compressive strength to the short-side endless belt 12, thereby ensuring the dimensional accuracy of the mold. Furthermore, since the short-side endless belt 12 has the flexible membrane 14, there is no fear that cooling water will infiltrate into the mold side.

C (Effects of the Invention) Since the apparatus of the present invention has the above-described configuration and operation, the present invention eliminates all the drawbacks of the above-mentioned conventional techniques and enables high-speed casting of thick plate slabs. The practical effect is that it is possible to realize a belt-type continuous metal plate casting device that is capable of

[Brief explanation of the drawing]

1 and 2 are schematic illustrations of essential parts of an embodiment of the present invention, with FIG. 1 being a partial perspective view, FIG. 2 being a partially enlarged view of FIG. 1, and FIG. 3 being a partially enlarged view of FIG. and Fig. 4 are schematic explanatory diagrams of a conventional example, Fig. 3 is a vertical cross-sectional view perpendicular to the long side of the slab, and Fig. 4 is a view taken along the line F--F in Fig. 3. . 1: Slab, 2, 2: Pair of endless belts, 3: Pulley, 4: Tundish, 5: Nozzle, 6: Backup roll, 7: Spray nozzle, 8: Spray, 11: Presser block, 12: Short side Side endless belt, 13: rib, 14: flexible membrane, 15: guide roll.

Claims (1)

[Claims] 1 A pair of endless belts that are stretched over a plurality of pulleys, driven by a drive source in a predetermined direction at a predetermined speed, and have vertical surfaces of a predetermined length facing each other; In a belt-type metal plate continuous casting apparatus comprising a pair of closing members that are elastically pressed against both end portions and close both side portions of the opposing vertical surfaces, the pair of closing members include:
It consists of a pair of short-side endless belts that are driven by a drive source in the same direction synchronously with the pair of endless belts, and the short-side endless belt has a plurality of back ribs having cooling water circulation grooves and the same back side. A belt-type continuous metal plate casting apparatus characterized in that a flexible membrane is attached to both end surfaces of the rib.