JPH0550191A - Guide carrying device for metal strip - Google Patents

Abstract

PURPOSE:To surely guide a rapidly cooled metal strip from a cooling roll surface and further, to stabilize a pass line for stably carrying to a coiler in order to execute stable metal strip guide under consideration of catching of the metal strip tip, variation of detaching point of the metal strip and characteristic of cooling roll surface in a device for guiding the rapidly cooled metal strip from the cooling roll surface. CONSTITUTION:A first carrying belt set adjacent to the surface of cooling roll and a second carrying belt synchronously moved successively under condition of noncontact with the cooling roll, are arranged. The above carrying belts are arranged according to the following (1)-(5). That is, (1) gap between the cooling roll and an inlet of the first carrying belt: 0.5-10mm, (2) gap between the cooling roll and an outlet of the first carrying belt: 0-3mm, (3) position from a pouring nozzle center to the outlet of the first carrying belt: 1/6-1/4 round, (4) angle of a tangent line of the cooling roll to axis of the second carrying belt: -10 deg.-+10 deg., (5) gap between the second carrying belt and the cooling roll: 0.1-10mm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention uses a synchronous moving belt to uniformly wind a rapidly cooled metal ribbon produced by rapidly solidifying molten metal on the surface of a cooling body,
The present invention relates to a device for deriving and conveying.

[0002]

2. Description of the Related Art As a technique for continuously producing a metal ribbon, there is a technique for directly producing a ribbon by rapidly solidifying molten metal on the surface of a cooling body. In order to manufacture a ribbon having a plate thickness of about 20 to 50 μm by the single roll method by such a metal ribbon manufacturing technique, a cooling rate of about 10 ⁴ to 10 ⁶ ° C./sec is generally required.

That is, in the method for producing a quenched metal strip, it is important to rotate the cooling roll at a constant high speed from the initial stage of pouring, unlike the ordinary sheet rolling method.
Otherwise, the paddle at the tip of the pouring nozzle cannot be stabilized, and it is extremely difficult to manufacture a quenched metal ribbon. Generally, a quenched metal ribbon produced at a high speed winds around the outer peripheral surface of a cooling roll, and various methods have been proposed for separating this from the roll surface. For example, JP-A-59
JP-A-141349 proposes a method in which a thin metal strip wound around a cooling roll is peeled off by a gas jet stream, and is closely wound by a coiler having a magnet or the like. The winding angle varies depending on the properties and material of the metal ribbon, and the metal ribbon cannot be guided stably. Further, Japanese Patent Laid-Open No. 59-43772 proposes a method in which a metal ribbon is sucked and guided by an ejector adjacent to a cooling roll, but a stable peeling point of the metal ribbon is secured for the same reason as above. Without it, the metal ribbon cannot be guided to the ejector suction port, and stable transport of the metal ribbon is difficult. Further, Japanese Patent Application Laid-Open No. 61-82953 proposes a method of improving the properties of a metal ribbon by pressing the metal ribbon against a cooling roll with a metal belt. In this method, it is difficult to guide the metal ribbon between the belts, and the metal ribbon is easily clogged inside the belt. Further, the pressing of the belt causes scratches on the surface of the cooling roll, making it impossible to manufacture a metal ribbon having good properties. In order to solve this problem, Japanese Utility Model Laid-Open No. 57-43772 proposes a method of transporting a metal ribbon by a gas injection guide located on the circumference of a cooling roll. In this method, there is a problem that the metal ribbon is separated from the cooling roll immediately after the leading edge of the metal ribbon is sucked, and the vertical movement of the metal ribbon causes clogging of the metal ribbon in the guide hood.

[0004]

Therefore, it is necessary to stably guide the metal ribbon in consideration of the capture of the tip of the metal ribbon, the variation of the peeling point of the metal ribbon, and the properties of the surface of the cooling roll. .. Therefore, in order to surely pull out the quenched metal ribbon from the surface of the cooling roll and to stably convey it to the winder,
It is an object of the invention to propose a device for stabilizing the pass line.

[0005]

SUMMARY OF THE INVENTION The present invention is an apparatus for drawing out from a cooling roll surface a quenched metal ribbon rapidly solidified on the surface of a cooling roll that rotates at a high speed. And a first conveyor belt that moves at the same speed as the surface speed of the first conveyor belt and captures and conveys the leading end of the quenched metal ribbon, and is disposed downstream of the first conveyor belt and has the same speed as the surface speed of the cooling roll. And a second conveyor belt for conveying the quenched metal ribbon, wherein the first and second conveyor belts are arranged according to the following (1) to (5). The present invention provides an induction transfer device. (1) Dimension of the gap between the cooling roll and the first conveyor belt on the metal ribbon inlet side: 0.5 to 10 mm (2) Dimension of the gap between the cooling roll and the first conveyor belt on the metal ribbon outlet side: 0 ~ 3 mm (3) Position from center of pouring nozzle to outlet of first conveyor belt: 1/6 to 1/4 round (4) Angle formed by axis of second conveyor belt and tangent of cooling roll: -10 ° ~ + 10 ° (5) Gap between the second conveyor belt and the cooling roll: 0.1
10 mm It is preferable that the first conveyor belt and the second conveyor belt are composed of a plurality of narrow belts and are stretched around a common rotating pulley roller and two tension rollers.

[0006]

According to the present invention, the first conveyor belt stably captures the tip of the metal ribbon, and the second conveyor belt stabilizes the metal ribbon in accordance with the variation of the peeling point of the metal ribbon and the surface property of the cooling roll. The guided metal ribbon is guided. Therefore, the metal ribbon can be stably conveyed to the winder, and the pass line can be stabilized.

FIG. 1 shows an apparatus for guiding a quenched metal ribbon according to the present invention. The molten metal poured directly above the cooling roll 2 from the pouring nozzle 1 rapidly solidifies to become a quenched metal ribbon 3. The leading end of the metal ribbon is captured in the first conveyor belt 4 arranged close to the cooling roll. First conveyor belt 4
Removes the metal ribbon from the surface of the cooling roll 2 together with the second conveyor belt 5 arranged on the exit side. In the figure, a doctor blade 7 for removing the metal ribbon attached to the cooling roll is arranged.

The first conveyor belt 4, as shown in FIG.
A guide 6 is installed at the tip of the entrance of the conveyor belt so as to be close to the pouring nozzle 1. The guide 6 facilitates guiding the ribbon to the conveyor belt. Further, in order to apply tension to the metal ribbon in the first conveyor belt 4, the second conveyor belt 5 that is synchronized with the cooling roll is arranged on the outlet side thereof,
The thin ribbon 3 is being smoothly transported.

Conditions for the congestion of the metal ribbon and the tension of the metal ribbon in the guide 6 vary depending on the gap between the first and second conveyor belts and the cooling roll, the position and angle of the conveyor belt, and the like. Further, as shown in FIG. 2, the conveyor belts 4 and 5 are composed of a plurality of narrow belts 8, and are wound around and held by one rotating pulley roll 9 and two tension rolls 10.

The reason for limiting the positional relationship between the first conveyor belt and the second conveyor belt will be described. FIG. 3 is an explanatory diagram of this relational position. (1) Gap L ₁ between the cooling roll and the entrance of the first conveyor belt:
0.5-10 mm It is advisable to bring the inlet of the first conveyor belt 4 as close as possible to the pouring nozzle, but since a splash, a thin metal strip, etc. are scattered, a guide 6 is installed at the inlet. The gap between the cooling roll 2 and the inlet of the first conveyor belt 4 is 0.5 m
If it is less than m, the leading end of the thin metal strip 3 cannot be smoothly guided into the entrance of the conveyor belt 4, and if it exceeds 10 mm, the first
The guide belt 4 cannot sufficiently guide and convey the metal ribbon. (2) Gap L ₂ between the cooling roll and the outlet of the first conveyor belt:
0 to 3 mm The cooling roll 2 and the outlet of the first conveyor belt 4 may come into contact with each other. If the distance between the cooling roll 2 and the outlet of the first conveyor belt exceeds 3 mm, the tension required for the metal ribbon cannot be obtained. , It cannot be smoothly guided to the second conveyor belt. (3) Position θ from the center of the pouring nozzle to the outlet of the first conveyor belt: ⅙ to ¼ circle If less than ⅙ circle, the guide conveyor of the metal ribbon by the first conveyor belt does not sufficiently act. If it exceeds / 4 laps, the peeling force of the metal ribbon from the cooling roll exceeds the tension of the metal ribbon, and the metal hood is clogged in the guide hood, which is not possible. (4) Angle φ between the axis of the second conveyor belt and the tangent of the cooling roll φ: −10 ° to + 10 ° From the point of stability of the pass line of the metal ribbon, the axis of the second conveyor belt and the tangent of the cooling roller are The angle is -10 ° to +1
0 ° is preferred. (5) Gap L ₃ between the second conveyor belt and the cooling roll: 0.
1-10 mm It is desirable that the second conveyor belt 5 and the cooling roll 2 are not in contact with each other,
In particular, if the gap is less than 0.1 mm, clogging of the metal ribbon inside the belt is likely to occur, the surface of the cooling roll is scratched, and a metal ribbon having good properties cannot be manufactured. Further, if it exceeds 10 mm, the conveying force by the second conveyor belt is lost, and the tension for guiding the metal ribbon from the cooling roll and the outlet of the first conveyor belt cannot be applied.

When the adhesive strength to the cooling roll surface is high depending on the type of the ribbon, the ribbon is peeled off by using an air knife or a doctor blade whose gas ejection port is directed in the opposite direction to the rotation of the cooling roll. Is effective for stably transporting the ribbon. Air, nitrogen, argon gas or the like can be used as the type of gas, and heat resistant rubber, metal belt or the like is used as the belt.

[0012]

EXAMPLE A mother alloy having a composition of 75Fe-20Cr-5Al (wt%) was melted using the apparatus of the embodiment of the present invention shown in FIGS. 1 and 2, and a melt was formed using a pouring nozzle made of silicon nitride. Diameter 8
It was injected onto the surface of a cooling roll made of a Cu alloy having an internal water cooling mechanism of 00 mm to produce a metal ribbon. The ribbon 3 was peeled off from the surface of the cooling roll 2 and guided by the first conveyor belt 4 arranged in the vicinity of the pouring nozzle and the second conveyor belt 5 arranged subsequently. The conditions and results are shown in Tables 1 and 2.

[0013]

[Table 1]

[0014]

[Table 2]

From the above examples, the front end of the quenched metal ribbon is captured at the entrance of the first conveyor belt which is arranged close to the surface of the cooling roll according to the conditions of the present invention, and is passed through the inside of the first conveyor belt. , Then, by guiding between the second conveyor belt arranged on the exit side of the first conveyor belt and the cooling roll, it becomes possible to stably and easily capture the leading end of the metal ribbon.
It was possible to stably guide the metal ribbon depending on the variation of the peeling point of the metal ribbon and the property of the surface of the cooling roll. Furthermore, it was possible to stabilize the pass line for stable conveyance to the winder.

[0016]

According to the present invention, in manufacturing a quenched metal ribbon, the first and second conveyor belts are provided to surely pull out the quenched metal ribbon from the surface of the cooling roll, and to stably wind the coiler. Can be transported.

[Brief description of drawings]

FIG. 1 is a schematic view of a guide transport device of the present invention.

FIG. 2 is a detailed view of a conveyor belt.

FIG. 3 is an explanatory diagram showing a positional relationship of a transport belt.

[Explanation of symbols]

1 Nozzle 2 Cooling Roll 3 Metal Strip 4 First Conveyor Belt 5 Second Conveyor Belt 6 Guide 7 Doctor Blade 8 Narrow Belt 9 Rotating Pulley Roll 10 Tension Roll 11 Pushing Cylinder 12 Guide Roller 13 Tundish 14 Spring Spring for Reduction

Claims (2)

[Claims] 1. A device for extracting a quenched metal ribbon rapidly solidified on the surface of a chill roll that rotates at a high speed from the surface of the chill roll, the device being disposed close to the surface of the chill roll and having the same speed as the surface speed of the chill roll. A first conveyor belt that moves and captures and conveys the front end of the quenched metal ribbon, and is disposed downstream of the first conveyor belt, and moves at the same speed as the surface speed of the cooling roll to cool the quenched metal foil. A guide transporting device for a thin metal strip, comprising: a second transporting belt for transporting the strip, wherein the transporting belt is arranged according to the following (1) to (5). (1) Dimension of the gap between the cooling roll and the first conveyor belt on the metal ribbon inlet side: 0.5 to 10 mm (2) Dimension of the gap between the cooling roll and the first conveyor belt on the metal ribbon outlet side: 0 ~ 3 mm (3) Position from center of pouring nozzle to outlet of first conveyor belt: 1/6 to 1/4 round (4) Angle formed by axis of second conveyor belt and tangent of cooling roll: -10 ° ~ + 10 ° (5) Gap between the second conveyor belt and the cooling roll: 0.1
10 mm 2. The first and second conveyor belts are composed of a plurality of narrow belts, and are stretched by a common one rotating pulley roll and two common tension rolls. The guiding and transporting device for the metal ribbon described.