JPS6221445A - Belt type continuous casting machine - Google Patents

Abstract

PURPOSE:To avert sheet breakage and to smooth the flow of a molten metal by forming a molten metal pool of moving type right and left side seals of a continuous casting machine and the peripheral surfaces of moving molds thereof and bringing the bottom nozzle of a molten metal pail to the position lower than the surface of the molten metal pool from above the moving molds then pouring a molten metal. CONSTITUTION:The molten metal M1 in the molten metal pail 12 is continuously supplied from a nozzle 13 into the molten metal pool P enclosed of a pair of the moving molds 1, 2 one of which is constituted of an endless belt 3 and the side seals 11. The surface of the pool P is maintained lower than the virtual horizontal plane H in contact with the top surface of the molds 1, 2. The pool P, therefore, dams up the molten metal M1 with the peripheral surfaces of the molds 1, 2 as the wall surfaces, thereby averting the sheet breakage arising from the presence of triple points. The pail 12 guides the flow direction of the molten metal M1 toward the moving direction of the molds 1, 2.

Description

Detailed Description of the Invention [Industrial Application Field] This invention is equipped with a pair of movable molds that circulate in opposite directions in a vertical plane, and at least one of the movable molds is constituted by an endless belt. A belt-type continuous casting machine that continuously casts a thin plate by pouring molten metal between a pair of moving molds from the opposite direction, cooling and solidifying the molten metal between the moving molds, and rolling it. It is related to.

[Prior Art] This type of continuous casting machine is equipped with a pair of movable molds 1.2 that circulate in opposite directions A and B in a vertical plane, as shown in Fig. 6. There is. In this figure,
Both movable molds 1, 2 are constituted by an endless belt 3. Zunaichi, these mobile type 1.2 roll 4
．． Endless belts 3 are passed between the rollers 5 and their corresponding guide rolls (not shown), and these endless belts 3 are circulated in the directions of arrows A and B. Then, molten metal M1 is poured into the molten metal pool P between these movable molds 1.2 from one nozzle (not shown).
molten metal to form a reservoir, which is placed on the circumferential surface 1 of the movable mold 1.2.
- gradually cooled and solidified ul and their dead solid shells M,
is rolled between moving molds 1 and 2 to continuously cast a thin plate M3.

Conventionally, in order to form the molten metal pool P, a side seal was placed between the ends of the movable mold 1.2 to cover that part, and a side seal was placed between the two ends of the movable mold 1.2, as shown in FIG. Each lower end is provided with a molten metal bucket seal 6 which is in contact with the circumferential surface of the movable molds 1 and 2.

A molten metal pool P is formed in the area surrounded by these side seals and the knoll 6, and within the molten metal pool P (the surface of the molten metal M1 in the J filter is
It is located above the top surface of.

[Problems to be Solved by the Invention] -1- In the conventional continuous casting machine described above, the lower end of the seal 6 forming the molten metal pool 1) and the circumferential surface of the movable die 1.2,
Point C where molten metal M1 contacts (hereinafter referred to as point 13-1)
exists long along the width direction of the moving mold 1.2]. This triple point C causes the following problem. In other words, a solidified shell of the molten metal M1, which is about to stop at the triple point 0, grows and enters the thin plate M3. In addition, the solidified shell acts as a resistance to pull both ends of the thin plate M3, causing the thin plate M3 to break.Also, the molten metal boule I is formed relatively large.
] There was a problem in that drifting occurred in the molten metal M1, which hindered the smooth flow of the molten metal M1.

1) A belt-type continuous casting machine according to the present invention is equipped with a pair of movable types that circulate in opposite directions in a vertical plane. - The moving type is constituted by the end heald; The thin plate was cooled and solidified between the molds, rolled in 9 pieces, and then placed in a continuous caster (4-held type continuous casting machine). A molten metal pool is formed between the f3 movable molds by the circumferential surfaces of the movable molds, and a molten metal pail into which molten metal is poured is placed above between the movable molds and separated from the circumferential surface of each movable mold. The bottom of the molten metal bucket extends below the imaginary horizontal plane that touches the surface of one of the moving molds, and the molten metal in the molten metal bucket is poured into the bottom of the molten metal bucket between the moving molds. It is characterized by a nozzle.

[Function] The heald type continuous casting machine of the present invention does not create a triple point in the width direction of a pair of moving dies, but instead creates a molten metal pool that is in contact with the circumferential surface of the moving dies below an imaginary horizontal plane. By pouring molten metal from the nozzle at the bottom of the molten metal pail located at +I-, l, make the flow smooth.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.

FIG. 1 shows an embodiment of the present invention. In this embodiment, of the pair of left and right movable molds 1 and 2, the left movable mold 1 is constituted by an endless belt 3, and the right movable mold 2 is constituted by [1].
- It is constituted by the outer periphery of the rule 5. The endless bell [3 is hooked between the roll 4 and the guide roll 9, 10, and the movable die 2 on the right side is constituted by the outer periphery of the roll 5 having a relatively large diameter. Cytonol 11 covers both ends of this j; moving type +12, and moving type 1.
A molten metal pool P is formed in a portion surrounded by the circumferential surface of 2. This molten metal pool 1] is equipped with a molten metal bucket 12 into which the molten metal M1 is poured. This molten metal bucket 12('' is spaced -1 from the circumferential surface of each movable mold 112, and its bottom extends downward from the imaginary horizontal plane 11 in contact with the -1- plane of the movable mold 1.2. The bottom of the molten metal pail 12 is shaped to follow the circumferential surface of the movable mold 1.2.The bottom of the molten metal pail 12 is designed to collect the molten metal M1 in the molten metal pail I2 into a molten metal pool. Pour out 4-a plurality of nozzles 13 are provided in P1.Next, the operation will be explained.

The moving type 1.2 moves cyclically in 77 directions, indicated by the opposite arrow A, and gradually cools and solidifies the molten metal M in the molten metal pool [) at its circumferential surface]. The shell M is rolled to continuously cast a thin plate M3. Inside the molten metal pool P,
The molten metal M1 in the molten metal bucket 12 is continuously supplied from the nozzle 13. Inside the molten metal boule P (the molten metal bucket should be kept below the virtual horizontal plane ■1 that is in contact with the 1-1 surfaces of the movable molds 1 and 2. Therefore, the molten metal pool I) is in the movable mold 1.2. In the axial direction, only the circumferential surface of the movable mold 1.2 is used as a wall surface to hold back the molten metal M1. Therefore, regarding the width direction of the movable mold 1.2, iJ mentioned above 1. There is a triple point like this, and the problem caused by the existence of the triple point, that is, the problem of the solidified shell that grows at the triple point, which causes the thin plate M3 to break, can be avoided. Avoided.

By the way, the molten metal bucket 12 in the molten metal boule P suppresses the drift of the molten metal M1 in the molten metal pool P by its own existence. Also, molten metal bucket 12i, J:.

The flow space of the molten metal M in the molten metal pool I] is created between the bottom of the movable mold 1 and the circumferential surface of the movable mold 1.
2, and the direction of flow of the molten metal M1 is guided in the direction of movement of the movable mold 1.2.

As a result, the molten metal M1 flows smoothly.

FIG. 2 shows the main part of another embodiment of the invention.

In this example, the molten metal bucket 12
The bottom of the mold is in contact with the circumferential surface of one movable mold (movable mold 1 on the left in the case of the figure), and the molten metal pail 12 is placed between the other movable mold (movable mold 2 on the right in the case of the figure). A molten metal pool P is formed. A nozzle 13 is provided on one side of the bottom of the molten metal bucket 12 so as to face the pool P side. Further, in this example, the movable mold 2 is constructed on the outer circumference of a [1-ru] 5 having the same diameter as the roll 4. In the case of this embodiment as well, operation 1. Then, thin plates M3 are continuously cast.

FIG. 3 represents yet another embodiment of the invention.

In this example, the right movable mold 2 in the embodiment shown in FIG. 1 described above is also constituted by an endless belt 3. That is, the endless belt 3 and 11 are passed between the roll 5 and the guide roll I4.

Therefore, both the left and right movable molds 1.2 are constituted by the endless belt 3, and continuous casting is carried out between these movable molds 1.2.

By the way, in each of the embodiments described above, the surfaces of movable molds 1 and 2 are set at the same height, but the upper surfaces of movable molds l and 2 are set to have different heights. In that case, the imaginary horizontal plane in contact with the upper surface of the movable mold on the side where the device is installed is the instep surface 1-1, in other words, the - of the movable mold 1.2. Including the case where the surfaces are at the same height, the plane H may be an imaginary horizontal plane that is in contact with the upper surface of the lower side.

4 and 5 are 5F side views showing different examples of the configuration of the molten metal pool P.

In the one shown in FIG. 4, the side seal 11 and the molten metal bucket I2 are constructed as separate bodies. 0 in Fig. 5 is a structure in which the 1 for Zydonol and the molten metal bucket 12 are integrated. A molten metal pool P is formed by the combination U of 1 and 1.

[Effects of the Invention] As explained above, the present invention provides a belt-type continuous casting machine in which at least one of a pair of movable molds is an endless belt. A molten metal pool is formed by (2) and molten metal is poured into the molten metal pool from a nozzle at the bottom of the molten metal pail located below an imaginary horizontal plane in contact with the top surface of the movable mold. It is possible to form a molten metal pool without creating triple points in the width direction of the molten metal boule, and it is possible to avoid the occurrence of plate breaks due to the presence of the triple points. The tub can prevent the molten metal from drifting and make the flow smooth.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of the present invention, FIG. 2 is a schematic diagram of the main parts of another embodiment of the invention, and FIG. 3 is a schematic diagram of yet another embodiment of the invention. , Figures 4 and 5
The figure is a plan view showing a different example of the configuration of the filter intermediate feed seal and the molten metal bucket (1'), and FIG. 6 is a schematic configuration diagram of the main parts of a conventional belt-type continuous casting machine.1. 2...Movable type, 3...Endless belt, 4.5...Roll, 11...Side seal, 12...Molten metal pail, 13. ···nozzle.

Claims (1)

[Claims] A pair of movable molds that circulate in opposite directions in a vertical plane are equipped, and at least one of the movable molds is constituted by an endless belt, and molten metal is poured from above between the pair of movable molds. In a belt-type continuous casting machine that continuously casts a thin plate by cooling and solidifying the molten metal between the moving molds and rolling it, a side seal that partitions the moving molds on both sides, and a A molten metal pool is formed between the movable molds by the circumferential surface of the mold, and a molten metal bucket into which molten metal is poured is placed above the movable molds apart from the circumferential surface of each movable mold. The bottom of the molten metal bucket extends below an imaginary horizontal plane in contact with the top surface of the movable mold, and a nozzle is provided at the bottom of the molten metal bucket to pour the molten metal in the molten metal between the movable molds. Belt type continuous casting machine.