JPS6213246A - Apparatus for producing thin metallic strip - Google Patents

Abstract

PURPOSE:To improve productivity by fashioning a molten metal ejection nozzle to a separate part divided from a molten metal supply pipe so that the exchange or repair of the molten metal ejection nozzle is allowed. CONSTITUTION:The molten metal ejection nozzle 25 provided toward a cooling rotating body 21 is attachably and detachably fitted into a moving stand 23. A slit part 26 is formed to the bottom end of the nozzle 25 and the molten metal supply pipe 27 extending upward and downward faces the top end. The nozzle 25 is exchanged by raising the pipe 27 and horizontally moving the stand 23 when the slit part 26 is worn or deformed. The stand 23 is then returned to the home position and the pipe 27 is lowered. The wear and deformation of the slit part 26 are thus easily dealt with by exchanging the nozzle 25 with the simple operation.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metal ribbon manufacturing device, and in particular, to obtain a wide amorphous metal ribbon used for parts for electronic devices, power transformer cores, etc. The present invention relates to a metal ribbon manufacturing apparatus suitable for.

[Conventional technology]

Recently, there is an apparatus that produces a metal ribbon by jetting molten metal alloy toward the circumferential surface of a full-rotation cooling body and rapidly solidifying it.

A conventional device of this kind includes a molten metal supply pipe 1 made of a heat-resistant material, as shown in an example in FIG. The molten metal supply pipe 1 has a molten metal spouting nozzle 2″f at its tip. A slit portion 4 is formed at the tip of the molten metal spouting nozzle 2.

A top end 5 of a top and bottom holding device is connected to the upper end of the molten metal supply pipe 1 by a mounting member 6.

Raw metal (not shown) is introduced into the molten metal supply pipe 1 from above the tip 5 of the upper and lower holding device. The raw metal fed into the molten metal supply pipe 1 is as follows.

The molten metal is completely melted by the heater 8 provided around the outer periphery of the molten metal supply pipe 1. As a result, molten metal 10 is obtained.

The molten metal supply pipe 1 is lowered by an air piston (not shown) or the like to a predetermined position where the slit portion 4 of the molten metal spouting nozzle 2 faces the circumferential surface of the rotary cooling body 12 with a small gap, and at that time, the molten metal is An inert gas such as argon gas is added to the molten metal 10 inside the supply pipe 1 at high pressure. The pressurized molten metal 10 is directed to the 9-turn cooling body 12 through the slit portion 4.
The liquid is ejected from the air and comes into contact with the circumferential surface of the rotating cooling body 12, which is rotating at high speed. At the same time, the molten metal 10 is rapidly cooled and solidified by the rotary cooling body 12, and as a result, a thin metal ribbon 15 is produced.

Note that the inner wall of the slit portion 4 is heated to a temperature almost equal to the temperature of the molten metal 10. (For example, Tokuko Sho 57-542
See No. 27. ) [Problems to be Solved by the Invention] By the way, the dimensions of the slit portion 4 of the molten metal supply pipe 1 are extremely important in order to define the dimensions of the metal ribbon 15. Therefore, it is necessary to keep track of the dimensions of the slit portion 4 at all times.

However, there is a problem in that the slit portion 4 of the molten metal supply pipe 1 is worn or deformed by the jet of molten metal.

Therefore, after the metal raw material has been melted and jetted a predetermined number of times, it is necessary to replace the molten metal supply pipe with a new molten metal supply pipe of the same metal size, or to repair it and reuse it. However, since the molten metal supply pipe 1 is generally made of quartz material, it requires skill in processing techniques to obtain the defined slit portion 4, and therefore has the problem of being expensive. Further, the molten metal supply pipe 1 is made of industrial quartz and is itself expensive. Therefore, these factors also affect the product cost of the obtained metal ribbon 15, making the metal ribbon 15 expensive.

Therefore, the object of the present invention is to provide a molten metal part that experiences relatively little wear and a part that experiences severe wear and shape changes.

Moreover, it is an object of the present invention to provide an apparatus for manufacturing a metal ribbon in which the molten metal jet portion, which requires precision in processing technology, is divided into parts, so that the molten metal jet portion has a minimum structure and can be replaced.

[Means for solving problems]

According to the present invention, there is provided a rotary cooling body that rotates around a single axis, and a molten metal spouting nozzle made of a heat-resistant material and arranged to face the circumferential surface of the rotary cooling body.

A molten metal supply pipe that is made separately from the molten metal spouting nozzle and receives raw metal to be supplied to the molten metal spouting nozzle, and a heater that heats the metal raw material introduced into the molten metal supply pipe to obtain molten metal. When the molten metal is spouted, the upper part of the molten metal spouting nozzle and the lower part of the molten metal come into contact with each other, and the molten metal is spouted from the molten metal supply pipe through the molten metal spouting nozzle and onto the rotary cooling body due to the pressure from the upper part. An apparatus for manufacturing a metal ribbon characterized by the following is obtained.

〔Example〕

FIG. 1 shows an embodiment of a metal ribbon manufacturing apparatus according to the present invention.

The illustrated metal ribbon manufacturing apparatus includes a cooling rotary body 21 that rotates at high speed around the entire horizontal axis;
It has a movable stand that can be moved linearly in the horizontal direction above the stand. A molten metal spouting nozzle 5 provided toward the cooling rotating body 21 is removably fitted into the movable frame. The molten metal spouting nozzle 5 has a slit portion 26 formed at its lower end. A molten metal supply pipe n extending vertically is opposed to the upper end of the molten metal spouting nozzle 5. The molten metal supply pipe 27 is vertically movable, and raw metal (not shown) is introduced into the pipe. The molten metal supply pipe n has a heater 30 for heating and melting the raw material metal inside the pipe n to obtain molten metal 29.
are provided along its outer periphery. At the upper end of the molten metal supply pipe 27, the tip part 32 of the vertical insertion device is attached to the member 33.
connected by. Furthermore, a heat-resistant plate 35 with all holes is disposed at the lower end of the interior of the molten metal supply pipe n.

When manufacturing a metal ribbon, the position of the movable frame is adjusted so that the molten metal spouting nozzle 25 is positioned directly below the heater I. Next, the molten metal supply pipe 27 is lowered from the upper part of the heater 3o and brought into contact with the upper end of the molten metal spouting nozzle 5, and a constant pressure (about 10 KNcm) is applied to the tip 32 of the upper cone mechanism.
2) Pressurize. Thereafter, raw metal is introduced into the molten metal supply pipe 27.

In this state, the raw material metal (eg, Fe-Co-B-8i ferromagnetic alloy) is heated by the heater 30 and melted.

The molten metal 4 obtained by melting is ejected through the slit portion 26 by an inert gas such as argon gas that is pressurized into the molten metal supply pipe n from above. The material of the molten metal spouting nozzle B is, for example, Si3N. Also, slit part 2
The dimensions of 6 are, for example, 0.3 circles x 50 circles.

The molten metal 29 spewing out from the slit portion 26 has an ORP of approximately 230
It is rapidly solidified by the rotary cooling body 21 rotating at M, and as a result, it has a thickness of 0.02 mm, a width of 50 pieces, a length of 150 pieces,
An amorphous metal ribbon of 200 nm is obtained.

When the slit section becomes worn or deformed.

As shown in FIG. 2, raise the molten metal supply pipe 27.

After the movable pedestal 23 is moved horizontally and the molten metal spouting nozzle 25 is replaced, the movable pedestal 23 is returned to its original position and the molten metal supply pipe 27 is lowered. In this way, the molten metal spout nozzle 2
By replacing 5 with a simple operation, the slit part 26
Can easily cope with wear and deformation.

In addition, it is preferable to interpose a cotton-like heat-resistant material on the joint surface between the molten metal spouting nozzle 5 and the molten metal supply pipe 27 in order to prevent leakage of the molten metal 29, thereby obtaining an even better leakage prevention effect.

Further, the shape of the tip of the molten metal spouting nozzle 5 may be arm-shaped, flat plate-shaped, or rectangular.

FIG. 3 shows another embodiment in which the metal ribbon manufacturing apparatus shown in FIGS. 1 and 2 is completely improved.

In the embodiment of FIG. 3, the movable cradle n is rotatably mounted about a vertical axis and can be rotated as required. Therefore, it is necessary that the molten metal spouting nozzle 5 is firmly fitted into the movable frame n so that it does not wobble even when rotated. In some cases, a preheater (not shown) for warming each molten metal spouting nozzle 25 is built into the movable frame n.

A plurality of melt supply pipes 27 that are movable in the vertical direction are provided above the movable frame B. The number of molten metal supply pipes 27 may be the same as or different from the number of molten metal spouting nozzles 5. Also, make sure that the molten metal supply pipes γ do not touch each other.
It is placed at a position that forms an angle.

Molten metal 29f: Before spouting, a predetermined molten metal spouting nozzle 5
The molten metal supply pipe 27 is made to face the molten metal supply pipe 27, and the molten metal supply pipe 27 is lowered to come into contact with the upper end of the molten metal spouting nozzle B. Thereafter, the molten metal 29 heated and melted by the heater (9) is ejected from the slit portion toward the circumferential surface of the cooling rotating body 21, similarly to the embodiments shown in FIGS. 1 and 2.

Inside the molten metal supply pipe n, an integrated or separate heat-resistant plate 35 having porous holes is provided at its lower part, so that when no pressure is applied to the upper part of the molten metal 4, the molten metal 35 is heated to its own surface. It is held inside the molten metal supply pipe n by tension. Now, when pressure is applied to the inside of the molten metal supply pipe n from above with an inert gas, the molten metal 29 is ejected from the holes of the heat-resistant plate 35 into the molten metal spouting nozzle 5, and further from the slit portion 26 to the circumferential surface of the cooling rotary body 21. erupts towards.

According to the embodiment shown in FIG. 3, while the raw metal is being melted in one molten metal supply pipe, the molten metal 29 can be spouted out through another molten metal supply pipe τ. Then, the movable pedestal 23 is appropriately rotated, and the molten metal spouting nozzle 5 and the molten metal supply pipe 27 used for spouting the molten metal 4 are replaced. Therefore, it is possible to improve work efficiency. Also.

Needless to say, in the event that the molten metal spouting nozzle 5 is damaged, work such as replacement can be carried out quickly.

〔Effect of the invention〕

As explained above, according to the metal ribbon manufacturing apparatus of the present invention, the molten metal spouting nozzle, which is subject to heavy wear, is separated from the molten metal supply pipe and made as a separate component, so only the molten metal spouting nozzle can be replaced. This can be repaired and therefore productivity can be improved.

Below margin

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a schematic configuration of an embodiment of a metal ribbon manufacturing apparatus according to the present invention, and FIG. 2 shows a state in which the molten metal spouting nozzle in FIG. 1 has been moved to a position offset from the molten metal supply pipe. FIG. 3 is a sectional view showing a schematic configuration of another embodiment of the present invention. FIG. 4 is a sectional view showing a schematic configuration of a conventional metal ribbon manufacturing apparatus. 1: Molten metal supply pipe, 2: Molten metal spouting nozzle, 4 Nislit part, 8: Heater, 10: Molten metal, 12: Cooling rotating body, 21;
Cooling rotating body, 23: moving frame, 25: molten metal spouting nozzle,
26; slit part, 27: molten metal supply pipe, 29; molten metal, 3
0: heater, 35: metal ribbon. Figure 4 Procedural amendment (voluntary) Showaro/October 2015

Claims (1)

[Claims] 1. A rotary cooling body that rotates around a single axis, a molten metal spouting nozzle made of a heat-resistant material arranged to face the circumferential surface of the rotary cooling body, and a molten metal spouting nozzle that is made separately from the molten metal spouting nozzle. It includes a molten metal supply pipe that receives raw metal to be supplied to the molten metal spouting nozzle, and a heater that heats the metal raw material introduced into the molten metal supply pipe to obtain molten metal, and when spouting the molten metal, the upper part of the molten metal spouting nozzle and a lower part of the molten metal are in contact with each other, and the molten metal is jetted from the molten metal supply pipe through a molten metal spouting nozzle and onto the rotary cooling body by pressure from the upper part.