JPH07144260A - Method and device for casting metal strip - Google Patents

Abstract

PURPOSE: To make it possible to produce plural metallic strips from a single pouring basin by suppressing the solidification of molten metal in the circumferential belt-like part in the required position in the transverse direction of one casting roll. CONSTITUTION: A pair of the casting rolls 16 and 16 are rotated in directions opposite to each other and the molten metal is introduced therebetween from a nozzle 19. The casting rolls 16 are cooled and are brought into contact with the molten metal to solidify the molten metal. Metallic shells are mated in the roll gap to form the metallic strips 20. An applicator 90 having an oil tank 91 and a nozzle 85 injects oil 92 in the circumferential belt-like part in the required position in the transverse direction of at least the casting roll 16 to suppress the solidification of the molten metal. The metallic strips 20 divided to a plurality in the transverse direction in the required position in the transverse direction of the roll 16 are thus produced in the gap of the rolls 16 and 16. As a result, the metallic strips of various sizes may be produced from one unit of the casting apparatus.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to a method and apparatus for casting metal strip. In particular, but not exclusively, for casting ferrous metal strips.

[0002]

2. Description of the Related Art Conventionally, a twin roll casting apparatus has been used for casting non-ferrous metals such as aluminum, but recently, the twin roll casting apparatus has been applied to continuous casting of ferrous metal strip. In a twin roll casting machine, a molten metal is introduced between a pair of horizontal casting rolls which are cooled and rotated in opposite directions, so that a solidified metal shell is formed on the surface of the moving casting roll and is fitted in the roll gap. Produces a metal strip at the roll gap exit. In this specification, the term “roll gap” generally refers to a region where rolls are closest to each other. Molten metal is guided between the rolls by a supply nozzle that produces a smooth metal flow across the width of the roll gap, and a pair of closing plates, commonly called "side dams," creates a casting sump defined in the roll gap. .

[0003]

Recent developments in twin roll casting equipment have made it possible to produce wide metal strips from a single casting sump using very wide casting rolls. As such a wide metal strip, for example, one having a width far exceeding 1 m, for example, conventionally, it is necessary to cut the metal strip into a narrow metal strip after casting the metal strip. It had the drawback of being inefficient.

In view of the above situation, the present invention can divide a metal strip in the width direction when forming the metal strip, and can produce a plurality of metal strips from a single casting pool. The metal strip cutting operation can be eliminated altogether, which dramatically increases the flexibility of the metal strip casting operation, especially from a single casting machine to various sizes of metal strip without significant equipment changes. It is intended to provide a metal strip casting method and apparatus capable of manufacturing a metal strip and enhancing manufacturing efficiency.

[0005]

According to the present invention, molten metal is introduced between a pair of casting rolls 16 which rotate in mutually opposite directions, the casting roll 16 is cooled, and the molten metal is brought into sufficient contact with them. In the metal strip casting method, in which the metal shells are solidified, and the metal shells are combined in the roll gap to form the metal strip 20, in at least one casting roll 16 is melted in a circumferential band portion at a required position in the roll width direction. According to the metal strip casting method, the metal strip 20 divided into a plurality of pieces in the width direction at the roll width direction required position is manufactured in a roll gap by suppressing the solidification of the metal.

In the above metal strip casting method, the solidification of the molten metal may be suppressed by supplying a substance that suppresses the solidification of the molten metal to a circumferential band portion of the casting roll 16 at a required position in the roll width direction. .

It is also possible to suppress the solidification of the molten metal by preventing the heat transfer from the molten metal to the circumferential strip portion at the required position in the roll width direction of the casting roll 16.

The substance that suppresses the solidification of the molten metal is a substance having fluidity, and the casting roll 16 is rotated by dropping or injecting the substance onto the circumferential band portion of the casting roll 16 at a required position in the roll width direction. As such, the substance may be applied to the surface of the casting roll 16.

It is desirable that the substance that suppresses the solidification of the molten metal is oil.

In the metal strip casting method, the circumferential band-like portion of the casting roll 16 at a required position in the roll width direction is recessed to form a circumferential groove 110. Solidification of the molten metal in the circumferential strip at the position may be suppressed.

A substance that suppresses metal solidification is supplied to the circumferential groove 110 formed in the circumferential band portion of the casting roll 16 at the required position in the roll width direction so that the circumferential band portion of the casting roll 16 at the required position in the roll width direction is formed. It is also possible to enhance the suppression of metal solidification.

The substance that suppresses the solidification of the molten metal is a substance having fluidity, and the substance is injected into the circumferential groove 110 formed in the circumferential band portion at a required position in the roll width direction of the casting roll 16 and the molten metal is injected. May be prevented from being transferred to the circumferential strip-shaped portion of the casting roll 16 at a required position in the roll width direction.

Further, according to the present invention, a pair of casting rolls 16 forming a roll gap therebetween, roll driving means 41 for rotating the casting rolls 16 in opposite directions, and the casting roll 1
Molten metal feeding means 17, 1 for feeding molten metal between 6
8, 19 and cooling means 4 for cooling the casting roll 16
2 and 43, the molten metal is brought into contact with the casting roll 16 to solidify into a metal shell, and the metal strip 2
In a metal strip casting apparatus for forming 0 in a roll gap, means 90 or 110 for suppressing solidification of molten metal is provided in a circumferential band-shaped portion at a required position in the roll width direction of at least one casting roll 16. The present invention relates to a metal strip casting device that does this.

In the metal strip casting apparatus, the means for suppressing the solidification of the molten metal supplies an applicator 90 for supplying the substance 92 for suppressing the solidification of the molten metal to the circumferential strip portion of the casting roll 16 at a required position in the roll width direction. It may be configured by.

The applicator 90 receives a tank 91 of a liquid substance 92 for suppressing solidification of molten metal, and receives the liquid substance 92 from the tank 91 to form a liquid substance on a circumferential strip portion of the casting roll 16 at a required position in the roll width direction. It may also be configured with a nozzle 95 for ejecting 92.

In the metal strip casting apparatus, the means for suppressing the solidification of the molten metal is constituted by a circumferential groove 110 formed by denting a circumferential strip portion at a required position in the roll width direction of the casting roll 16. May be.

The means for suppressing the solidification of the molten metal may be further constituted by an applicator 90 for adding the substance 92 for suppressing the solidification of the molten metal to the circumferential groove 110 of the casting roll 16.

An applicator 90 holds a tank 91 of a liquid substance 92 for suppressing solidification of molten metal, and a circumferential groove 110 of the casting roll 16 which receives the liquid substance 92 from the tank 91.
And a nozzle 95 for ejecting the liquid substance 92.

[0019]

In the metal strip casting method of the present invention,
Molten metal is introduced between a pair of casting rolls 16 rotating in mutually opposite directions, the casting roll 16 is cooled, and the molten metal is brought into sufficient contact with them to solidify into a metal shell, and the metal shell is rolled. When the metal strips 20 are formed together by the gaps, the solidification of the molten metal is suppressed at the circumferential band-shaped portion of at least one of the casting rolls 16 at the required position in the roll width direction, whereby the width at the required position in the roll width direction is reduced. A metal strip 20 divided in a plurality of directions
Are produced in the roll gap.

When a substance that suppresses the solidification of the molten metal is supplied to the circumferential strip portion of the casting roll 16 at the required position in the roll width direction, the solidification of the molten metal is suppressed. The metal strip 20 divided into a plurality of parts is manufactured in the roll gap.

A substance that suppresses the solidification of the molten metal is supplied to the circumferential band-shaped portion of the casting roll 16 at the required position in the roll width direction, and the molten metal is supplied to the circumferential band-shaped portion at the required position of the casting roll 16 in the roll width direction. When the heat transfer is blocked, the solidification of the molten metal is suppressed, and the metal strip 20 divided into a plurality in the width direction at the required position in the width direction of the roll is manufactured in the roll gap, as described above.

The substance that suppresses the solidification of the molten metal is a substance having fluidity, and the substance is dropped or injected into the circumferential strip at a required position in the roll width direction, so that the casting roll 16 rotates. Accordingly, even if the substance is applied to the surface of the casting roll 16, the solidification of the molten metal is suppressed, and similarly to the above, the metal strip 20 divided into a plurality in the width direction at the required position in the roll width direction.
Are produced in the roll gap.

If the substance that suppresses the solidification of the molten metal is oil, heat transfer from the molten metal to the circumferential strip portion at the required position in the roll width direction of the casting roll 16 is blocked, and the solidification of the molten metal is sufficiently suppressed. Similarly to the above, the metal strip 20 divided into a plurality in the width direction at the required position in the roll width direction is manufactured in the roll gap.

The circumferential band-shaped portion of the casting roll 16 at the required position in the roll width direction is recessed to form a circumferential groove 110, and the circumferential groove 110 forms a circumferential band at the required position in the roll width direction of the casting roll 16. Even if the solidification of the molten metal is suppressed, the metal strip 2 divided into a plurality of parts in the width direction at the required position in the roll width direction, as described above.
0 is produced in the roll gap.

When a substance that suppresses metal solidification is supplied to the circumferential groove 110 formed in the circumferential band portion of the casting roll 16 at the required position in the roll width direction, the circumferential band portion of the casting roll 16 at the required position in the roll width direction is formed. The metal solidification control is further enhanced, and the metal strip 20 divided into a plurality of pieces in the width direction at the required position in the width direction of the roll is manufactured in the roll gap.

A substance that suppresses the solidification of the molten metal is a substance having fluidity, and the substance is formed in a circumferential band portion at a required position in the roll width direction of the casting roll 16 in the circumferential groove 1.
10 to prevent heat transfer from the molten metal to the circumferential strip at a required position in the roll width direction of the casting roll 16, solidification of the molten metal is sufficiently suppressed, and the roll is the same as described above. The metal strip 20 divided into a plurality in the width direction at the required position in the width direction is manufactured in the roll gap.

Further, in the metal strip casting apparatus of the present invention, the molten metal feeding means 17, 18, 19 from the molten metal feeding means 17, 18, 19 are provided between the pair of casting rolls 16 which are rotated in opposite directions by the driving of the roll driving means 41. Is introduced, the casting roll 16 is cooled by cooling means 42 and 43, and the molten metal is sufficiently brought into contact with them to solidify into a metal shell, and the metal shell is aligned in a roll gap to form a metal strip 20. At this time, the solidification of the molten metal is suppressed by the means 90 or 110 for suppressing the solidification of the molten metal, which is provided in the circumferential band-shaped portion at a required position in the roll width direction of at least one of the casting rolls 16. The metal strip 20 divided into a plurality of pieces in the width direction at the position required in the direction is manufactured in the roll gap.

The means for suppressing the solidification of the molten metal is constituted by an applicator 90 for supplying the substance 92 for suppressing the solidification of the molten metal to the circumferential strip portion of the casting roll 16 at a required position in the roll width direction. In this case, when the substance 92 is supplied from the applicator 90 to the circumferential strip portion at the roll width direction required position of the casting roll 16, the solidification of the molten metal is suppressed by the substance 92, and as described above,
The metal strip 20 divided into a plurality of pieces in the width direction at the required position in the width direction of the roll is manufactured in the roll gap.

The applicator 90 receives a liquid substance 92 from the tank 91 for suppressing solidification of molten metal, and receives the liquid substance 92 from the tank 91 to form a liquid substance on a circumferential strip portion at a required position in the roll width direction of the casting roll 16. When it is configured with the nozzle 95 for injecting 92, the tank 9
When the liquid substance 92 in 1 is jetted from the nozzle 95 to the circumferential band portion of the casting roll 16 at the required position in the roll width direction, solidification of the molten metal is suppressed by the liquid substance 92, and as in the above, at the required position in the roll width direction. The metal strip 20 divided into a plurality in the width direction is manufactured in the roll gap.

When the means for suppressing the solidification of the molten metal is constituted by the circumferential groove 110 formed by denting the circumferential belt-shaped portion at a required position in the roll width direction of the casting roll 16, the circumferential groove is formed. By 110, the solidification of the molten metal in the circumferential band portion at the required position in the roll width direction of the casting roll 16 is suppressed, and similarly to the above, the metal strip 20 divided into a plurality in the width direction at the required position in the roll width direction has the roll gap. Manufactured in.

When the means for suppressing the solidification of the molten metal is further constituted by an applicator 90 for adding the substance 92 for suppressing the solidification of the molten metal to the circumferential groove 110 of the casting roll 16, the roll of the casting roll 16 is When the substance 92 that suppresses metal solidification is supplied from the applicator 90 to the circumferential groove 110 formed in the circumferential band portion at the widthwise required position, the metal solidification of the circumferential band portion at the roll widthwise required position of the casting roll 16 is performed. The suppression is further enhanced, and the metal strip 20 divided into a plurality in the width direction at the required position in the roll width direction is manufactured in the roll gap.

An applicator 90 is provided with a tank 91 of a liquid substance 92 for suppressing solidification of molten metal, and a circumferential groove 110 of the casting roll 16 which receives the liquid substance 92 from the tank 91.
And a nozzle 95 for ejecting the liquid substance 92 to the nozzle 9
When jetting from 5 to the circumferential groove 110 of the casting roll 16,
Solidification of the molten metal is sufficiently suppressed by the circumferential groove 110 and the liquid substance 92, and the metal strip 20 divided into a plurality in the width direction at the required position in the width direction of the roll is manufactured in the roll gap, as described above.

[0033]

Embodiments of the present invention will be described below with reference to the drawings.

The casting apparatus shown in FIGS. 1 to 6 has a factory floor 12
It has a main machine frame 11 rising from The casting roll carriage 13 supported by the main machine frame 11 is horizontally movable between the assembly station 14 and the casting station 15. Molten metal is supplied from a ladle 17 through a tundish 18 and a metal supply nozzle 19 to a pair of parallel casting rolls 16 carried by a casting roll carriage 13 during casting. Since the casting roll 16 is water-cooled, solidified metal shells are formed on the surface of the moving roll and are fitted in the roll gap, and the metal strip 2 is fed at the roll exit.
0 is created.

According to this embodiment, this metal strip 2
The 0 can be split into two separate metal strips 20, both of which can be sent to the main coiler 21 and then to the second coiler 22. The container 23 is the casting station 15
Since it is attached to the main machine frame 11 adjacent to the main machine frame 11, an emergency plug is provided when there is a serious inconvenience during casting such as the molten metal passing through the overflow port 24 of the tundish 18 or the severe deformation of the metal strip 20. By removing 25, it can be released into the container 23.

Since the carriage frame 31 constituting the casting roll carriage 13 is mounted on the rail 33 by the wheel 32 and the rail 33 extends along a part of the main machine frame 11, the entire casting roll carriage 13 moves to the rail 33. It will be listed as possible. The casting roll 16 is rotatably attached to a pair of roll cradle 34 carried by the carriage frame 31. The roll cradle 34 is attached to the carriage frame 31 by interengaging complementary sliding members 35, 36 and moves under the influence of hydraulic cylinder devices 37, 38 to adjust the spacing of the casting rolls 16. A double-acting hydraulic piston cylinder device 39 capable of moving the entire casting roll carriage 13 along the rail 33 is connected between the drive bracket 40 of the casting roll carriage 13 and the main machine frame 11 to move the casting roll carriage 13 It can be moved from the assembly station 14 to the casting station 15 and vice versa.

The casting roll 16 is rotated in opposite directions via the roll drive shaft 41 of the electric motor and the transmission on the carriage frame 31. In the series of water cooling passages formed in the peripheral wall made of copper of the casting roll 16 and extending in the longitudinal direction and spaced in the circumferential direction, the roll end is connected to the water cooling conduit in the roll drive shaft 41 connected to the water cooling hose 42 via the rotating gland 43. Cooling water is supplied through. The typical size of the casting roll 16 is about 500 mm in diameter, and can be several meters when producing multiple metal strips 20 as described below.

The ladle 17 is of conventional construction and is supported from the overhead crane via the yoke 45 and can be moved from the hot metal receiving station into place. By moving the stopper rod 46 attached to the ladle 17 by the servo cylinder, the molten metal can be flowed from the ladle 17 to the tundish 18 through the outlet nozzle 47 and the refractory shroud 48.

The tundish 18 also has a conventional structure and is in the shape of a wide plate made of a refractory material such as magnesium oxide (MgO). One side of the tundish 18 receives the molten metal from the ladle 17, and is provided with the overflow port 24 and the emergency plug 25 described above. The other side of the tundish 18 is provided with a series of longitudinally spaced outlet openings 52. The mounting bracket 53 that carries the lower part of the tundish 18 is for mounting the tundish 18 on the dolly frame 31, and receives the positioning peg 54 of the dolly frame 31 through the opening provided in the mounting bracket 53 to mount the tundish 18 on the trolley frame 31. It is designed for accurate positioning.

The metal supply nozzle 19 is formed as an elongated body made of a refractory material such as alumina graphite, and has a tapered lower portion and is recessed inward and downward. it can. The mounting bracket 60 is provided to support the metal supply nozzle 19 on the dolly frame 31, and a side flange 55 protruding outward is formed on the upper portion of the metal supply nozzle 19 to engage with the mounting bracket 60.

The metal supply nozzle 19 has a series of flow passages which are horizontally separated from each other and extend substantially vertically. The metal supply nozzle 19 produces an appropriate low-rate discharge flow of metal in the width direction of the casting roll 16 to cause initial solidification. Molten metal can be delivered to the nip of the casting roll 16 without directly contacting the 16 surface.
Alternatively, the metal supply nozzle 19 may be formed in the shape of a single long hole to directly feed the low-speed curtain-shaped molten metal into the gap between the casting rolls 16. In either case, the metal supply nozzle 19 may be submerged in the molten metal reservoir.

The molten metal reservoir is defined at the end of the casting roll 16 by a pair of side closure plates 56. The side closure plate 56 is held on the stepped end 57 of the casting roll 16 when the casting roll carriage 13 is at the casting station 15. The side closing plate 56 is made of a strong refractory material such as boron nitride, and has a scallop side end 81 that matches the curved surface of the stepped end 57 of the casting roll 16.
Have. A plate holder 82 to which the side closing plate 56 is attached
Is movable at the casting station 15 by the operation of a pair of hydraulic cylinder devices 83, the side closure plate 56 is engaged with the stepped end 57 of the casting roll 16 and formed on the casting roll 16 during the casting operation. A closed end portion of the molten metal reservoir.

During the casting operation, the stopper rod 46 is actuated so that molten metal is poured from the ladle 17 into the tundish 18 and, via the metal feed nozzle 19, into the casting roll 16.

The metal strip 20 is first guided to the jaw of the main coiler 21 by actuation of the apron table 96. The apron table 96 is suspended from the pivot mounting portion 97 on the main machine frame 11, and can be swung toward the main coiler 21 by the operation of the hydraulic cylinder device 98. The apron table 96 can be operated with respect to the upper strip guide flap 99 operated by the piston cylinder device 101, and the metal strip 20 is guided between a pair of vertical side rolls 102. When the tip of the metal strip 20 is guided by the jaw of the main coiler 21,
The main coiler 21 is rotated to wind up the metal strip 20, causing the apron table 96 to pivot in the opposite direction and return to the inoperative position, away from the metal strip 20 directly wound onto the main coiler 21. It is simply suspended from the main machine frame 11. Metal strip 2
0 becomes the final winding product which is later sent to the second coiler 22 and carried out from the casting apparatus.

In this embodiment, the casting apparatus is provided with an oil applicator 90, as schematically shown in FIG. The oil applicator 90 constitutes the oil tank 9 in which the oil 92 is stored.
1, and by pressurizing this through the pressurizing line 93, the oil 92 is finely injected to the intermediate position between the roll ends of the one casting roll 16 through the valve 94 and the nozzle 95. As the casting roll 16 rotates, oil is applied to the narrow circumferential strip portion of the roll surface at the intermediate position.

The present inventor applies any kind of oil to the surface of the roll in this manner, thereby suppressing the heat transfer between the molten metal and the oil-coated band on the surface of the roll. It was measured. By suppressing the heat transfer, the solidification of the molten metal is sufficiently suppressed, and the metal strip 20 exiting the roll gap can be divided in the width direction of the metal strip. In this way, the metal strip 20 formed from a single casting sump can be laterally divided into a plurality of metal strips 20, the width of which is determined by the positioning of the nozzle 95 of the oil applicator 90.

As shown in FIG. 6, the metal strip 20 may be divided in the middle of the entire width of the metal strip to form a pair of metal strips 20 having the same width, but the oil applicator 90 is moved to move the metal strip 20 at different positions in the width direction. It can also be divided into Furthermore, an additional oil applicator 90 is added to the casting roll 1
By providing the metal strips 20 at the required positions in the width direction, the dividing positions of the metal strips 20 are increased, and the desired number of metal strips 2
It can also be effectively divided into zeros.

The divided metal strips 20 can be wound on a single main coiler 21, but they can be separated on separate main coilers 2.
You may wind up with 1. If a separate main coiler 21 is provided, the separated metal strips 20 can be guided to different main coilers 21 either above or below the main coiler 21 for the other metal strips 20. Alternatively, the two metal strips 20 after exiting the casting roll 16 are directed in opposite directions and passed through a main coiler 21 provided separately on each side of the casting apparatus. In this case, two apron tables (not shown) can be provided to orient the metal strips 20 in opposite directions.

It has been found that the application of the oil 92 is sufficient to divide the metal strip 20 in the width direction with only one of the casting rolls 16. However, in some cases, a pair or a plurality of pairs of oil applicators 90 are disposed at appropriate positions along the width direction of both casting rolls 16 and oil 92 is applied to suppress metal solidification in both rolls 16. It is also possible to provide very sharply defined widthwise split edges.

Oil has been found to be most suitable for supplying metal to the surface of the casting roll 16 to suppress solidification of the metal, but other materials may be used to suppress solidification. By injecting a liquid or powdery flowable substance onto the roll surface and acting as a barrier for heat transfer to the roll surface,
It is also possible to select a substance that suppresses metal solidification or that suppresses solidification by reacting with molten metal to affect the solidification.

The substance that suppresses solidification of the metal may be, for example, a substance that exothermically reacts with the molten metal to suppress the solidification, or may have an effect on heat transfer to the casting roll 16 and an exothermic reaction with the molten metal. A mixture that suppresses metal solidification by both may be used. For example, when casting ferrous metal strips, the material added to inhibit metal solidification may include powdered aluminum, silicon, calcium, or other elements that exothermically react with molten steel or dissolved oxygen in the steel, Such components can be supported on an oil base to improve fluidity and adhesion to the casting roll 16 and provide a barrier to heat transfer to the roll surface. The manner of deposition, application, etc. can vary considerably depending on the material used.

It has also been found that heat transfer and metal solidification can be suppressed at the groove positions by providing circumferential grooves on one or both of the casting rolls 16. This suppression may be sufficient to allow the metal strip 20 to be divided in the width direction without applying or applying a substance that suppresses metal solidification. Further, by adhering and applying a substance that suppresses metal coagulation to the groove, the metal coagulation suppressing effect can be enhanced, and the metal strip 20 having sharply defined divided ends can be obtained.

FIG. 7 shows a modified example of the apparatus shown in FIGS. 1 to 6, in which the metal strip 20 is divided into casting rolls 1.
This is achieved only by the solidification suppressing effect of providing the circumferential groove 110 on one side of No. 6, and the nozzle 95 of the oil applicator 90 can be eliminated. It has been found that even a groove having a width of 1 mm or less and a depth of 1 mm or less can divide the metal strip 20 satisfactorily without any other influence on the metal strip forming method.

FIG. 8 shows a further modification,
The circumferential groove 110 of the casting roll 16 is fitted with the oil applicator 90.
The oil applicator 90 is positioned so that oil can be injected into the circumferential groove 110. In this case, the circumferential groove 110 serves to confine the oil so that it does not spread to the roll surface and to suppress heat transfer from the molten metal, thereby providing a particularly sharp and sharply defined metal strip edge. .

With some waste of material, this embodiment can be used to trim the ends of metal strips. That is, the main metal strip can be formed between two narrow outer metal strips and the outer metal strip can be delivered to the scrap bin via the shearing device without winding.

The metal strip casting method and apparatus of the present invention are not limited to the above-mentioned embodiments,
Needless to say, various changes can be made without departing from the scope of the present invention.

[0057]

As described above, according to the metal strip casting method and apparatus of the present invention, the metal strip can be divided in the width direction when the metal strip is formed,
Can produce multiple metal strips from a single casting sump,
The metal strip cutting operation after casting can be completely eliminated, which dramatically increases the flexibility of the metal strip casting operation, especially from a single casting machine without major equipment changes. It is possible to produce metal strips of various sizes, and it is possible to exert an excellent effect that the production efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a metal strip casting apparatus configured to operate in accordance with the present invention by using metal solidification suppressing means on one of the casting rolls.

FIG. 2 is a side view of the metal strip casting apparatus shown in FIG.

FIG. 3 is a vertical sectional view taken along the line III-III in FIG.

FIG. 4 is a vertical sectional view taken along the line IV-IV of FIG.

5 is a vertical cross-sectional view taken along line VV of FIG.

FIG. 6 shows how to make a plurality of separate metal strips divided by a metal strip casting device.

FIG. 7 is a view showing a modified example in which one or both of the casting rolls is grooved so that the metal strip is divided.

FIG. 8 is a diagram showing a further modified example in which the metal strip is divided by grooving the casting roll and applying / applying a substance that suppresses metal solidification.

[Explanation of symbols]

16 Casting roll 17 Ladle (molten metal feeding means) 18 Tundish (molten metal feeding means) 19 Metal supply nozzle (molten metal feeding means) 20 Metal strip 41 Roll drive shaft (roll driving means) 42 Water cooling hose ( Cooling means) 43 Rotating gland (cooling means) 90 Oil applicator (means for suppressing solidification of molten metal) (Applicator) 91 Oil tank (tank) 92 Oil (substance, liquid substance) 95 Nozzle 110 Circumferential groove (melting) (Means to suppress solidification of metal)

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Hisahiko Fukase 1-1-501-501 Meguro, Meguro-ku, Tokyo (72) Inventor Robert Melville Hobbs Australia 2500 New South Wales Keilaville Zips Road 360 (72) Inventor Walter Bledge Australia 2519 New South Wales Borgone Ryanth Treat 9

Claims (14)

[Claims] 1. A metal shell in which molten metal is introduced between a pair of casting rolls (16) which rotate in mutually opposite directions, the casting roll (16) is cooled, and the molten metal is sufficiently brought into contact with them. In a metal strip casting method of forming a metal strip (20) by coagulating the metal shells in a roll gap to form a metal strip (20), at least one casting roll (16) is melted at a circumferential band portion at a required position in the roll width direction. A method for casting a metal strip, characterized in that a metal strip (20) divided into a plurality in the width direction at a required position in the roll width direction is manufactured in a roll gap by suppressing solidification of metal. 2. The metal strip according to claim 1, wherein the solidification of the molten metal is suppressed by supplying a substance that suppresses the solidification of the molten metal to a circumferential strip-shaped portion of the casting roll at a required position in the roll width direction. Casting method. 3. The method for casting a metal strip according to claim 2, wherein solidification of the molten metal is suppressed by preventing heat transfer from the molten metal to a circumferential strip portion at a required position in the roll width direction of the casting roll (16). . 4. A material that suppresses solidification of molten metal is a fluid material, and the material is cast by dropping or injecting the material onto a circumferential strip portion at a required position in the roll width direction of a casting roll (16). Method according to claim 2 or 3, characterized in that the substance is applied to the surface of the casting roll (16) as the roll (16) rotates. 5. The metal strip casting method according to claim 3, wherein the substance that suppresses the solidification of the molten metal is oil. 6. A circumferential groove (11) is formed by recessing a circumferential strip portion at a required position in the roll width direction of a casting roll (16).
0) is formed, and the solidification of the molten metal at the circumferential band-shaped portion of the casting roll (16) at the roll width direction required position is suppressed by the circumferential groove (110). 7. A circumferential groove (11) formed in a circumferential strip portion of a casting roll (16) at a required position in the roll width direction.
7. The metal strip casting method according to claim 6, wherein a substance for suppressing metal solidification is supplied to 0) to enhance the metal solidification suppression of the circumferential strip portion at a required position in the roll width direction of the casting roll (16). 8. A circumferential groove (110) formed in a circumferential strip portion of a casting roll (16) at a required position in the roll width direction, wherein the substance that suppresses the solidification of the molten metal is a fluid substance. The method for casting a metal strip according to claim 7, wherein the heat is transferred from the molten metal to a circumferential strip portion of the casting roll (16) at a required position in the roll width direction. 9. A pair of casting rolls (16) forming a roll gap therebetween, roll driving means (41) for rotating the casting rolls (16) in opposite directions, and melting between the casting rolls (16). Molten metal feeding means (1) for feeding metal
7) (18) (19) and cooling means (42) (43) for cooling the casting roll (16), and the molten metal is brought into contact with the casting roll (16) to solidify into a metal shell. In the metal strip casting apparatus for forming the metal strip (20) in the roll gap, a means (90) for suppressing solidification of the molten metal in at least one of the casting rolls (16) at a circumferential band-shaped portion at a required position in the roll width direction. ) Or (110) is provided, The metal strip casting apparatus characterized by the above-mentioned. 10. The means for suppressing the solidification of the molten metal comprises a casting roll (1) containing a substance (92) for suppressing the solidification of the molten metal.
10. An applicator (90) for supplying to a circumferential strip-shaped portion at a required position in the roll width direction of 6).
The described metal strip casting apparatus. 11. An applicator (90) comprises a tank (91) of a liquid substance (92) for inhibiting the solidification of molten metal,
A nozzle (95) for receiving a liquid substance (92) from the tank (91) and injecting the liquid substance (92) to a circumferential strip at a required position in the roll width direction of the casting roll (16). Item 10. The metal strip casting apparatus according to Item 10. 12. The means for suppressing solidification of molten metal comprises a circumferential groove (110) formed by denting a circumferential strip portion at a required position in the roll width direction of a casting roll (16). 10. The metal strip casting apparatus according to item 10. 13. A means for suppressing solidification of molten metal, wherein a substance (92) for suppressing solidification of molten metal is used as a casting roll (1).
6) Applicator (9) added to the circumferential groove (110)
13. The metal strip casting apparatus according to claim 12, further comprising 0). 14. The applicator (90) comprises a tank (91) of a liquid substance (92) for suppressing the solidification of molten metal,
Upon receiving the liquid substance (92) from the tank (91), the liquid substance (92) is placed in the circumferential groove (110) of the casting roll (16).
13. A nozzle (95) for injecting
The described metal strip casting apparatus.