JPS6138742A - Apparatus for producing thin-walled metallic strip - Google Patents

Abstract

PURPOSE:To prevent the cooling of a molten metal and to produce a thin metallic film having uniform material quality in the stage of producing the thin metallic film from the molten metal by a cooling drum under rotation by providing a heater and cap to a gate contg. the molten metal. CONSTITUTION:The cooling drum 1 which rotates toward an arrow direction around the horizontal shaft and is internally cooled with water is installed in proximity to one side face of the gate 2 consisting of side walls 2b, 2c, a bottom wall 2a and a cap 2d at the top wall provided with a nozzle 7 for pouring the molten metal. The molten metal poured from the nozzle 7 into a pouring basin 3 for the molten metal sticks and solidifies in the form of the thin metallic film 4 to the outside circumferential part of the drum 1 under rotation and is thereafter stripped from the drum 1 by a scraper 5, by which the thin metallic film is continuously produced. The heating element 8 such as electric heater is embedded to the side walls 2b, 2c and the bottom wall 2a of the gate 2 in this case by which the heating of the molten metal is made possible. The radiational cooling of the molten metal is prevented by installing the top wall 2b. The thin amorphous or ultrafine crystalline metallic film having always the uniform material quality is thus continuously produced.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a thin metal strip manufacturing apparatus for manufacturing an amorphous or ultrafine crystalline thin metal strip by rapidly cooling molten metal. It is related to.

[Prior art and its problems]

In recent years, amorphous or ultrafine crystalline thin metal strips produced by rapidly cooling molten metal have attracted attention because of their good electromagnetic properties.

As shown in a schematic cross-sectional view in FIG. 2, a manufacturing device for such thin metal strips includes a cooling drum 1 whose axis is horizontal and rotates at a predetermined speed, and a part of the outer circumferential surface of the cooling drum 1. A device is known which consists of a weir 2 provided in close proximity to a cooling drum 1 for forming a molten metal reservoir 3.

When molten metal is supplied into the molten metal reservoir 3 while rotating the cooling drum 1 at a predetermined circumferential speed in the direction shown by the arrow, the molten metal adheres to the outer peripheral surface of the cooling drum 1 and as it rotates. It is taken out from the molten metal reservoir 3 with a predetermined thickness,
It is rapidly cooled by the cooling drum 1 and becomes a thin metal strip 4. The thin metal strip 4 is peeled off from the cooling drum 1 by a scraper 5 and is rolled up by a winding machine (not shown).

In the above-mentioned apparatus, the weir 2 has a bottom wall 2a adjacent to the outer circumferential surface of the cooling roll 1 with a gap that prevents molten metal from leaking, and a gap that prevents molten metal from leaking at both axial ends of the cooling roll 1. It is formed from a pair of side walls 2b adjacent to each other at a distance, a bottom wall 2a, and a pair of side walls 2c connected to the fill wall 2b, and the upper part thereof is open.

As a result, the temperature of the molten metal supplied into the molten metal reservoir 3 is lowered by the bottom wall 2a and side walls 2b, 2c of the weir 2, as well as by heat dissipation from the open top, and further, There was a problem in that the temperature of the molten metal near the contact portion with the cooling roll 1 decreased.

In this way, when the temperature of the molten metal near the bottom wall 2a, side walls 2'b, 2c, and upper part of the weir 2 and near the contact area with the cooling roll l becomes lower than other parts, the cooling roll 1
The quenching start temperature of the molten metal is not uniform, and as a result, it is not possible to manufacture a thin metal strip of uniform material.

[Object of the Invention] From the above-mentioned viewpoint, the object of the present invention is to provide an apparatus capable of producing a thin metal strip of uniform material without causing a local temperature drop in the molten metal in the molten metal reservoir. I am determined to provide it.

[Summary of the invention]

The apparatus of the present invention includes a cooling drum having a horizontal axis that rotates at a predetermined speed, and a cooling drum adjacent to the cooling drum for cooperating with a part of the outer peripheral surface of the cooling drum to form a molten metal reservoir. An apparatus for manufacturing a thin metal strip comprising a weir provided with a weir, wherein a heating element is embedded in the bottom wall, side wall, and top wall of the weir so as not to lower the temperature of the molten metal in contact with the bottom wall and the side wall; The weir is characterized in that the upper part of the weir is covered with a top wall having a nozzle insertion hole for supplying molten metal into the molten metal reservoir.

[Structure of the invention]

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic cross-sectional view of the device of the invention.

The same parts as before will be explained using the same reference numerals. As shown in the drawings, in the device of the present invention, as in the conventional device, there is a cooling drum 1 whose axis is horizontal and rotates at a given circumferential speed, and a part of the outer circumferential surface of the cooling drum 1 cooperates with the cooling drum 1. A weir 2 is provided adjacent to a cooling drum 1 to form a molten metal reservoir 3.

In the device of this invention, the upper part of the weir 2 is covered with a top wall 2d, and the top wall 2d is provided with a hole 6 through which a nozzle 7 for supplying molten metal into the molten metal reservoir 3 is inserted. It is being

And especially the cooling drum 1 on the bottom wall 2a1 bottom m2a of the weir 2
Heating elements 8, such as electric heaters, are embedded at predetermined intervals inside the portion 2e adjacent to the side walls 2b, 2c1, and the top wall 2d. The heating element 8 replenishes an amount of heat 5 corresponding to the amount of temperature drop of the molten metal due to heat dissipated in the molten metal reservoir 3 or the like.

The heating element 8 may be an electric heater or, for example, may be one in which high-temperature gas is blown into a heating hole.

〔Effect of the invention〕

The apparatus of the present invention is constructed as described above, and the bottom wall 2a, side walls 2b, 2c, and top wall 2d of the weir 2 are heated by the heating element 8, so that the molten metal supplied into the molten metal reservoir 3 is heated by the heating element 8. Since the temperature of the portion in contact with the bottom wall 2a, side walls 2b and 2c does not drop, and the upper part of the weir 2 is covered with the top wall 2d having the heating element 8, the molten metal in the molten metal reservoir 3 Furthermore, since the portion 2e of the bottom wall 2a adjacent to the cooling drum 1 is heated by the heating element 8, the temperature of the molten metal near the contact portion with the cooling drum 1 is lowered. There will be no decline.

Therefore, it is possible to ensure that the temperature at which the molten metal in the cooling drum 1 starts to fall rapidly is equal to or higher than a predetermined temperature, and it is possible to manufacture a thin metal strip of uniform material.

As described above, according to the apparatus of the present invention, there is no local temperature drop in the molten metal in the molten metal reservoir, and a thin metal strip of uniform material can be manufactured, which is an excellent industrial effect. is brought about.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of the device of the present invention, and FIG. 2 is a schematic sectional view of a conventional device. In the drawings, 1... cooling drum, 2... weir, 2a... bottom wall,
2b, 2c...Side wall, 2d...Top wall, 2e...Proximity to the cooling roll

Claims (1)

[Scope of Claims] A cooling drum whose axis is horizontal and rotates at a predetermined speed; and a cooling drum adjacent to the cooling drum for forming a molten metal reservoir in cooperation with a portion of the outer circumferential surface of the cooling drum. A thin metal strip manufacturing apparatus comprising a weir provided with a weir, wherein a heating element is embedded in the bottom wall, side wall, and top wall of the weir to prevent a decrease in the temperature of the molten metal in contact with the bottom wall and the side wall; 1. An apparatus for manufacturing a thin metal strip, characterized in that an upper part of a weir is covered with a top wall having a nozzle insertion hole for supplying molten metal into the molten metal reservoir.