JP3336188B2 - Winding method of metal ribbon - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the production of a metal strip by a quenching process using a cooling roll, particularly when the metal strip is peeled from the cooling roll and transported to a take-up reel for winding. It is intended to avoid damage to the belt.

[0002] In recent years, development relating to the production of metal ribbons by a quenching process using a cooling roll has been promoted.
In the industrialization, when a rapidly solidified metal ribbon (hereinafter, referred to as a ribbon) is peeled from a cooling roll, and then transported to a take-up reel and wound into a coil on the reel,
If the tension applied to the ribbon becomes excessive, the ribbon will break,
It is important to apply an appropriate tension to the ribbon.

[0003]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 6-182508 discloses an apparatus for conveying a ribbon to a take-up reel while applying tension to the ribbon, using a permeable conveyor belt with two or more pulleys. There is disclosed a suction type conveyor which holds and rotates and suctions air from a suction box provided inside the conveyor via a conveyor belt. By operating the belt of the suction type conveyor at a speed higher than the ribbon speed immediately after the belt is separated from the cooling roll, that is, at a speed higher than the plate making speed, the tension is applied to the ribbon by the frictional force generated between the belt and the ribbon. The transfer while applying is realized.

As the belt of the suction type conveyor, a nylon mesh belt used in the papermaking industry or the like or a stainless steel mesh belt used for a timing belt, which can withstand high-speed rotation, is generally used. It is a target.

[0005]

By the way, in the papermaking industry and the like, a nylon mesh belt for transporting paper is used in a wet type in which water constantly flows on the belt surface, so that the coefficient of friction becomes very small. In addition, the paper can be conveyed without excessive tension acting on the paper. However, since the transport of the ribbon is a dry type and the belt temperature rises to about 100 ° C., a nylon belt with low heat resistance has a problem.
Since the ribbon and the belt are in a state close to welding, the coefficient of friction increases, and the tension acting on the ribbon tends to be excessive. As a result, the ribbon often breaks.

On the other hand, stainless steel mesh belts have a low coefficient of friction even when used in a dry condition and at a belt temperature of about 100 ° C. Becomes

An object of the present invention is to advantageously solve the above-mentioned problems, and it is an object of the present invention to propose a method for winding a ribbon which can reduce the tension applied to the ribbon during transportation. And

[0008]

According to the present invention, a molten metal is poured onto the surface of a cooling roll rotating at high speed, rapidly solidified to form a metal ribbon, and then gas is blown substantially in a tangential direction of the cooling roll. The metal strip is peeled off from the cooling roll, and then the stripped metal strip is sucked by a suction conveyor arranged near the cooling roll, and the belt of the suction conveyor is operated in this suction state to wind up the metal strip. When the belt is wound on the take-up reel while applying tension to the metal ribbon by transporting it to the reel, the tension applied to the metal ribbon by the conveyor using a suction conveyor coated with a fluororesin on the surface of the belt. This is a method for winding a thin metal ribbon, characterized by reducing the amount of the metal ribbon.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an apparatus for manufacturing a ribbon used in the method of the present invention. In the drawing, reference numeral 1 denotes a cooling roll rotating at a high speed, and a molten metal 3 is poured out from a nozzle 2 having a slit-shaped opening on the cooling roll 1 and the molten metal 3 is rapidly cooled and solidified on the cooling roll 1. Then, the ribbon 4 is formed.

Next, the ribbon 4 is peeled off from the cooling roll 1 by blowing air, for example, compressed air, in a substantially tangential direction of the roll 1 with an air nozzle 5 having a slit-shaped opening for blowing the compressed air. At the beginning of the suction conveyor 6 installed below the peeling point, the leading end of the ribbon 4 is adsorbed, and the conveyor belt is operated while the ribbon 4 is adsorbed to convey the ribbon 4 to the take-up reel 7 side. Then, the ribbon 4 is wound around the take-up reel 7 using a pressing roll or the like, and the ribbon is wound with a tension required for winding. Reference numeral 8 denotes a device for guiding and crushing the leading end of the low-quality ribbon manufactured before the plate making operation reaches a steady state. Wrap around.

The suction conveyor has a structure that sucks air by using a magnet in addition to the above structure that sucks air. Further, the number of suction conveyors installed is not limited to one, and a plurality of suction conveyors can be used.

The present invention is characterized in that the tension applied to the ribbon conveyed by the suction conveyor 6 is reduced in the above-described ribbon winding step. Therefore, in the present invention, as a result of intensive studies on the belt of the suction conveyor 6, the surface of the belt has high heat resistance,
In addition, they have found that a thin-film tension can be reduced with a suction conveyor coated with a fluororesin, which has excellent self-lubricating properties even at high temperatures.

FIG. 2 shows a suction conveyor 6 according to the present invention.
The belt 11 of the conveyor 6 circulating and moving in the vicinity of the suction box 10 has a built-in suction box 10 having an upper surface constituted by a suction plate 9 having an opening ratio of about 20%. Suction is performed by a suction blower 12 installed outside, and the thin strip 4 on the belt 11 is sucked through the suction plate 9 and the belt 11 of the suction box 10. Normally, the belt 11 of the suction conveyor 6 is moving at a speed increased by about 5% with respect to the plate making speed, so that the ribbon 4 is always tensioned by the frictional force with the belt 11. .

According to the present invention, when the surface of the belt 11 is coated with a fluororesin such as Teflon, the frictional force generated between the ribbon 4 and the belt 11 is reduced. The tension applied to the band 4 is also reduced.

FIG. 3 shows the relationship between the belt surface temperature and the friction coefficient of a conventionally used nylon belt and a belt coated with a fluororesin according to the present invention. From the figure, it can be seen that the friction coefficient of the nylon belt increases as the surface temperature of the belt increases, whereas the belt coated with the fluororesin has a constant value regardless of the belt temperature.

The thickness of the fluororesin coated on the belt is preferably about 20 to 30 μm. If it is too thick, surface cracks and the like are likely to occur, and if it is too thin, the durability is reduced.

The base material of the belt of the suction conveyor is as follows:
Although there is no particular limitation, it is recommended that conventional nylon can be easily used, and that aramid fibers such as Kevlar that can withstand high tension be used.

[0018]

EXAMPLE C: 0.5 at using the manufacturing equipment shown in FIG.
%, Si: 9 at% and B: 11.5 at%, and after maintaining the molten metal substantially composed of iron at a temperature of 1300 ° C., the nozzle 2 is rotated at a peripheral speed of 30 m / s at a high speed. It was poured onto the peripheral surface of a cooling roll 1 made of a copper alloy to form a ribbon 4 having a thickness of 25 μm. Next, the ribbon 4 is peeled off from the cooling roll 1 by blowing air from the air nozzle 5, and the leading end of the ribbon 4 is attracted to the belt of the suction conveyor 6 disposed immediately below the cooling roll 1. In this state, the belt of the conveyor 6 is moved at 31.5 m / s (increased by 5% with respect to the peripheral speed of the cooling roll), and the ribbon 4 is conveyed to the take-up reel 7 to crush the unsteady portion of the ribbon tip. After removal by device 8,
After winding the ribbon 4 around the take-up reel 7, the take-up reel 7 took up the ribbon.

Here, the belt 11 of the suction conveyor 6 is
The aramid fiber material is coated with fluorocarbon resin at a thickness of 25 μm.The tension applied to the ribbon during transport is lower than the tension of a conventional suction conveyor using nylon for the belt 11 at the position of the peeling point. Halved.

[0020]

According to the present invention, since the ribbon tension during transport is reduced, it is possible to prevent overtension rupture and to take up the ribbon in a good condition without surface flaws. Was.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a production facility for a ribbon.

FIG. 2 is a diagram showing a structure of a suction conveyor.

FIG. 3 is a diagram showing an influence of a belt surface material on a friction coefficient between a belt and a ribbon.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooling roll 2 Pouring nozzle 3 Molten metal 4 Thin strip 5 Air nozzle 6 Suction conveyor 7 Take-up reel 8 Crusher 9 Suction plate 10 Suction box 11 Belt 12 Suction blower

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tohru Sato 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Corporation Chiba Works (56) References JP-A-7-215432 (JP, A) 7-1091 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22D 11/06 390 B22D 11/06 360 B21C 47/02

Claims (1)

(57) [Claims] 1. A molten metal is poured onto the surface of a high-speed rotating cooling roll, rapidly solidified to form a metal ribbon, and then gas is blown substantially tangentially to the cooling roll to separate the metal ribbon from the cooling roll. Then, the stripped metal ribbon is suctioned by a suction conveyor arranged near a cooling roll, and the belt of the suction conveyor is operated in this suction state to convey the metal ribbon to a take-up reel. In taking up the ribbon with a take-up reel while applying tension to the ribbon, using a suction conveyor coated with a fluororesin on the surface of the belt, reducing the tension applied to the metal ribbon by the conveyor. Winding method for metal ribbon.