JPH0478383B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for continuously manufacturing thin metal wires.

In recent years, a so-called rotating liquid spinning method has been proposed as a method for producing thin metal wires having a circular cross section from molten metal, and the establishment of this technology is progressing rapidly.
That is, JP-A-56-165016, JP-A-57-52550,
There are Japanese Patent Application Laid-open No. 57-79052, etc. The characteristics of these technologies are that a liquid layer is formed by centrifugal force on the inner peripheral surface of a rotating cylindrical drum, a molten metal jet is ejected into the liquid layer, and the molten metal is rapidly solidified to produce thin metal wires. This method can easily obtain thin metal wires with a circular cross section and excellent properties, and can significantly increase the cooling rate compared to conventional methods. It is known that it is particularly suitable for manufacturing thin metal wires made of metals contained therein. The inventors,
Although we have continued to conduct intensive research into the development of manufacturing equipment and manufacturing technology for spinning in a rotating liquid as disclosed in the above-mentioned disclosure, we have now come across a major obstacle. That is, in the rotating liquid spinning method, a cooling liquid layer is formed on the inner peripheral surface of a rotating cylindrical drum by centrifugal force, and by keeping the surface and inside of this cooling liquid layer stable, the molten metal ejected as a jet is Allowing the cooling liquid to stably enter the cooling liquid layer without turbulence,
In addition, after the molten metal flow is rapidly solidified, it is stably wound around the inner wall of a cylindrical drum by centrifugal force to form a desired thin metal wire.
Therefore, the procedure for manufacturing thin metal wires by the conventional spin-in-spinning method is as shown in FIG. The metal is heated and melted to become a molten metal 3 and waits to be ejected from a nozzle 4 having a predetermined hole diameter attached to the tip of the melting furnace 2. Next, the cylindrical drum 5 is rotated at a predetermined number of rotations, and a predetermined amount of cooling liquid 6 is supplied from a supply device (not shown). Subsequently, the melting furnace system (heating device 1 and melting furnace 2) is set at a predetermined position in the space inside the cylindrical drum 5 as shown in the figure. Thereafter, an inert gas is introduced at a predetermined pressure through a pipe 7 communicating with the melting furnace 2 to apply pressure to the molten metal, and the molten metal is ejected as a jet 8 from the nozzle 4. The jet 8 enters the rotating cooling liquid, rapidly solidifies and becomes a thin metal wire 9 (cross section shown), which is wound around the inner wall of the cylindrical drum 5. Usually, it is necessary to wind up a certain length of thin metal wire, so the melting furnace system [heating device 1 and melting furnace 2] is traversed in the width direction of the cylindrical drum 5 [in the direction of arrow 10]. After all of the initially charged master alloy has been ejected, the melting furnace system is moved from the inside of the cylindrical drum 5 to the outside, and then the rotation of the cylindrical drum 5 is stopped, and the falling cooling liquid is collected in a receiver (not shown). After being received in a container, the produced bundle of thin metal wires is taken out.
A batch-type production method in which the above-described steps are performed in one cycle has been the conventional spinning solution spinning method.
Therefore, as can be easily surmised, the amount of thin metal wire per batch is limited due to constraints imposed by the size of the machinery and equipment, and preparatory and post-processing operations for each batch require time. For these reasons, the drawback of the conventional rotating liquid spinning method is that the productivity is extremely low, and the reality is that it cannot be commercialized at all.

The present inventors have overcome the above-mentioned obstacles, and have provided a method and apparatus for continuously manufacturing fine metal wires with high productivity and low processing costs, which take advantage of the basic characteristics of the spinning method. .

Embodiments of the present invention will be described below based on the drawings. FIG. 2 is a schematic diagram showing the principle of the present invention. In the figure, 11 is a metal melting furnace system;
2 is a molten metal jet flow spouted from a nozzle attached to the tip of the melting system 11; 13 is a molten metal jet flow 13a;
3b and 13c, which run in a spiral trajectory, and have a structure in which, for example, grooves are bored in a rubber belt and can hold a cooling liquid layer of a certain shape. 14
is a nozzle that supplies liquid to the water channel 13, and the amount of liquid supplied can be adjusted depending on conditions such as the speed and shape of the water channel 13 running. As shown in the diagram,
The molten metal jet stream 12 ejected in the loop 13b is rapidly solidified in the cooling liquid layer that runs along a rotating orbit along with the water channel 13, and is drawn to the bottom of the water channel 13 by the action of centrifugal force. It becomes a thin metal wire, passes through the loop 13c, separates from the liquid layer at one end 13d of the water channel 13, and is wound up by the winder 15. The rubber belt forming the water channel 13 changes direction and returns to the other end position 13e, which endlessly supplies liquid to the water channel 13. As a method for making the waterway 13 draw a spiral trajectory, for example, a fixed rail that draws a spiral trajectory is created by connecting rail units 16 as shown in FIG. 3A, and a shape as shown in FIG. 3B is formed on the rail. There is a method of wearing an endless belt 17 having the following. Here, when the belt 17 runs on the fixed rail, in order to reduce frictional resistance and make the run smooth, compressed air is guided to the rail through the introduction pipe 18 and applied to the sliding surface between the rail and the belt 17. There is a method that uses a so-called air bearing method that forms an air layer. It is also possible to adopt a traveling system using wheels 19 as shown in FIGS. 4A and 4B, or a traveling system using electromagnets 20 and 21 as shown in FIGS. 5A and 5B. Although FIG. 2 shows the water channel 13 having three loop portions 13a to 13c, this is not necessarily the case; for example, the loops necessary for stabilizing the liquid layer when the running speed of the water channel 13 is fast. The number of rail units can be selected arbitrarily, and the device can be easily manufactured by combining the above-mentioned rail units.

As described above, the present invention jets a molten metal jet stream toward a stable liquid layer formed by a spiral motion that is approximately equivalent to a rotational motion, rapidly solidifies the molten metal jet to create a thin metal wire, and forms a liquid layer. By being able to take out the thin metal wire from a part of the waterway, continuous production of the thin metal wire is possible, and the productivity is high and the thin metal wire can be provided at low cost.

Example Using the apparatus shown in FIGS. 2 and 3,
An alloy having a composition of Fe ₇₅ Si ₁₀ B ₁₅ (subscripts are atomic %) was continuously melted at 1320° C. and continuously ejected from a nozzle having a diameter of 0.15 mm by applying a pressure of 4.3 Kgf/cm ² . The belt has a shape of 20 mm wide and 15 mm deep.Water at 5℃ is continuously supplied from the water supply nozzle, and the supply amount is adjusted so that the grooves of the rubber belt are filled, and the rubber belt is moved at a speed of 700 m/min. I ran it with The rubber belt was formed into three spirals with a diameter of approximately 500 mm, and the above-mentioned ejection position was set at the middle of the spirals. The total length of the belt was 25 m. The wound thin metal wire had a diameter of 0.15 mm, a substantially perfect circular cross section, and was substantially amorphous. Furthermore, the continuity of the thin metal wire reached a total wire length of 420,000 m, or 10 hours, excluding forced switching during dotting during winding.

By the way, metals that can be applied to the present invention include pure metals, metals containing trace amounts of impurities, and all kinds of alloys. In particular, alloys that have excellent properties when rapidly solidified, such as amorphous phase The most preferred alloys are alloys that form or alloys that form non-equilibrium crystalline phases. Specific examples of alloys that form the amorphous phase include "Science" No. 8, 1978, pp. 62-72, Bulletin of the Japan Institute of Metals, Vol. 15, No. 3, 1976, pp. 151-206, and "Metals ”
Documents such as the December 1, 1971 issue, pages 73-78, and JP-A-49
−91014, JP-A-1973-101215, JP-A-49-
No. 135820, JP-A-51-3312, JP-A-51-4017
No., JP-A-51-4018, JP-A-51-4019, JP-A-51-65012, JP-A-51-73920, JP-A-51-
No. 73923, JP-A-51-78705, JP-A-51-79613
No. 52-5620, Japanese Patent Application Laid-open No. 114421-1982, Japanese Patent Application Laid-open No. 99035-1984, and many other publications. Among these alloys, Fe-Si-B system, Fe-P-C system, Fe-P-B system, Fe-Si-B system, Fe-P-B system,
type, Co-Si-B system, Ni-Si-B system, etc., but the types include metal-semimetal combination, metal-semi-metal combination,
Needless to say, there are a large number of metal combinations to choose from. Moreover, by taking advantage of its compositional characteristics, it is possible to assemble an alloy with excellent properties that cannot be obtained with conventional crystalline metals. Further, as a specific example of an alloy that forms a non-equilibrium crystalline phase, for example, "Tetsu to Hagane" Vol. 66 (1980) No. 3, 382-389
Page, “Journal of the Japan Institute of Metals,” Vol. 44, No. 3, 1980, 245
~page 254, “TRANSACTION OF THE
JADAN INSTITUTE OF METALS”
VOL.20No.8August1979 pages 468-471, Japan Institute of Metals Autumn Conference General Lecture Summary (October 1979) page 350,
Fe-Cr-Al alloy, Fe-Al-C described on page 351
Mn-Al-C described in the Japan Institute of Metals Autumn Conference General Lecture Abstracts (November 1981) pages 428-425
alloy, Fe-Cr-Al alloy, Fe-Mn-Al-C
Examples include alloys.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing a conventional method, Fig. 2 is a schematic diagram showing an embodiment of the present invention, and Figs.
Figures A and B are schematic perspective views of various examples of waterway devices according to the present invention. 11... Melting furnace system, 12... Molten metal jet flow, 13... Water channel, 13a to 13c... Loop portion in water channel, 14... Liquid supply nozzle, 15...
Winding machine, 16...Rail unit, 17...Belt, 18...Introduction pipe, 19...Wheel, 20, 21
……electromagnet.

Claims (1)

[Claims] 1. Cooling liquid is supplied into the water channel of the endless belt running in the spiral rail unit, and centrifugal force is exerted by applying a motion equivalent to circumferential motion to the cooling liquid, resulting in stable operation. A series of thin metal wires, characterized in that a liquid layer is formed, a molten metal jet flow ejected from a molten system is infiltrated into the liquid layer, and the thin metal wires are taken out from a part of the waterway and taken out by rapid solidification. Production method. 2. An endless belt is installed in a spiral rail unit so that it can run freely, and a nozzle for supplying cooling liquid is provided in a waterway of the endless belt, and a liquid layer formed by the cooling liquid supplied to this waterway is formed in a spiral shape. An apparatus for continuous production of thin metal wire, characterized in that a means for spouting a molten metal jet flow at a suitable position in the loop portion is provided, and a winder is provided for taking out and winding the metal solidified by the liquid layer from a suitable position in the water channel. .