JPS63168255A - Method and apparatus for producing fine metallic wire - Google Patents

Abstract

PURPOSE:To obtain a fine metallic wire having fixed shape and quality by reciprocately moving a molten metal injection nozzle toward width direction of a drum while keeping distance between inclined liquid coolant layer surface and the molten metal injection nozzle at constant. CONSTITUTION:An axial line direction servomotor 40 is fitted to an axial line direction slide mechanism 42 and a radius direction slide mechanism 44 is driven toward the axial line direction. A radius direction servomotor 46 is fitted to the radius direction slide mechanism 44 and the molten metal injection apparatus 26 composing of heating coil 48 and molten metal injection nozzle 30 is driven toward radius direction. A rotating axial line direction servomotor 40 and the radius direction servo motor 46 are connected with a controller 52, to enable to operate a programming numerical control. While keeping the distance between the molten metal injection nozzle 30 and liquid coolant surface 24a at the constant distance by the program, the molten metal is injected from the nozzle 30.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a method and apparatus for producing thin metal wires, and in particular to an improvement in a spinning submerged spinning method, in which a drum is rotated horizontally. METHODS AND APPARATUS.

[Prior Art] The method of obtaining fine metal wire directly from molten metal has been developed from the viewpoint of energy saving by omitting intermediate steps such as cap blooming and rolling, or the development of metal materials with new properties obtained by rapid solidification. It has received particular attention in recent years. The excellent properties obtained by rapid solidification include ultra-fine crystal grains, non-segregation, homogenization, expansion of the solid solubility limit, and strength, corrosion resistance, electrical and magnetic properties due to amorphization, etc.1 For example, amorphous structure Amorphous metal wires, or amorphous fibers, exhibit high strength and toughness that cannot be obtained with conventional crystalline metals, so they are being considered for application as high-strength materials, and they also have unique magnetic properties. , its application as a fi-capable material can be considered.

Conventional methods for obtaining thin metal wires directly from molten metal, expressed as yfP, can be roughly divided into the following four methods.

1) Extrusion method 2) Rotating liquid spinning method 3) I) DME method 4) 'l'aylor method 1) The extrusion method uses a melt molten in an inert gas as a fluid with a viscosity comparable to that of molten metal. In this method, the jet stream is stabilized by injecting it into the interior of the fiber, thereby forming fibers.

The spinning method in rotating liquid (2) is a method in which a cooling liquid layer is formed in a rotating drum by centrifugal force, and molten metal is injected into this cooling liquid to form fibers.

3) PT) ME method is Pendant Drop Me
It is an abbreviation for the ltE xtraation method, which is a method in which pendant-shaped metal droplets are attached to the side of a disk rotating at high speed, and then pulled out and solidified.

The Taylor method (4) is a method in which metal placed in a glass tube is heated and melted, the glass tube softened by heating is pulled out together with the melt inside, and a drum is wound up.

A conventional apparatus used in the rotating liquid spinning method is shown in FIG. 4 as a front view and FIG. 5 as a side sectional view. In FIG. Coolant outflow prevention plate 1 having a circular opening 14 in the center
6 and a closing plate 18 that covers the entire surface of the other side of the cylindrical part 12, and a motor 20 is installed at the center of the closing plate 18.
The output shaft 22 of is fixed, and the drum 10 rotates at high speed.

Cooling liquid is supplied to the inner periphery of the drum 10 rotating at high speed, and the cooling liquid forms a cooling liquid layer 24 due to centrifugal force. The molten metal injection device 26 includes a vertical molten metal heating furnace 28 , a molten metal injection nozzle 30 attached downward to the lower end of the molten metal heating furnace 28 , and a molten metal pressurizing pipe 32 attached to the upper part of the molten metal heating furnace 28 . The opening 1 of the drum 10
4 and can move in the axial direction of the drum 10. In order to obtain a thin metal wire using this rotating liquid submerged spinning device, the drum 10 is rotated and a cooling liquid is supplied to form a rotating cooling liquid layer 24 on the inner circumference of the drum 10.Then, the drum 10 is rotated and a cooling liquid is supplied to form a rotating cooling liquid layer 24 on the inner circumference of the drum 10. The inserted master alloy is melted to form a molten alloy 34, and the molten metal injection device F26 is connected to the drum 10.
The molten metal injection nozzle 30 is positioned above the inlet end 25a of the cooling liquid tank 25. Next, inert gas is fed into the molten metal pressurizing pipe 32 to cool the molten metal 3.
4 from the molten metal injection nozzle 30, and at the same time, the molten metal injection device 26
It moves slowly from m toward the far end 25b. The injected molten alloy jet stream 36 is injected into the cooling liquid layer 24 and rapidly cooled to become a metal aa 38. By this method,
The thin film 38 is continuously formed and stored in a rotating cooling liquid bath 25 within the drum 10.

In this conventional rotating liquid spinning method, the continuously produced metal wire &a38 is not collected from the drum 10,
As it accumulates more and more in the cooling liquid tank 25 of the drum 10, when the drum 10 is stopped and the thin metal wire 38 is taken out, the gold Btm wire 3 stuck to the inside of the drum due to centrifugal force is removed.
8 loses centrifugal force and falls down into a ball-like shape, which has the disadvantage that it is very difficult to disentangle and recover the entangled metal side [38].

Therefore, there is a method to prevent this by rotating the drum horizontally. However, when the drum is rotated horizontally, the surface of the cooling liquid layer is inclined due to the influence of gravity. Since the distance between the two changes, there is a problem that a fine metal wire of constant quality cannot be obtained.

[Problems to be Solved by the Invention] The present invention was made in view of the above-mentioned problems when the drum is rotated horizontally in the rotating liquid spinning method.
It is an object of the present invention to provide a method for manufacturing a thin metal wire and an apparatus therefor, in which a thin metal wire of constant quality can be obtained even when a drum is rotated horizontally.

[Means for Solving the Problems] In the method for producing metal mRNA of the present invention, a cooling liquid outflow prevention plate is formed on the side surface of a cylindrical drum, and the cooling liquid is applied to the inner peripheral surface of the drum by centrifugal force by rotating the drum. A method for manufacturing gold E4 fine wire by reciprocating the injection nozzle of a molten metal injection device in the direction of the rotational axis of the drum to form a layer and inject a molten metal jet onto the cooling liquid layer, the method comprising: The gist is to rotate the cooling liquid horizontally and to inject molten metal from the molten metal injection nozzle while maintaining a constant distance between the surface of the cooling liquid layer, which is inclined due to the gravity of the cooling liquid, and the molten metal injection nozzle. .

In addition, the metal #I wire manufacturing apparatus of the present invention includes a cooling liquid outflow prevention plate formed on the side surface of the cylindrical drum, the drum being rotated to form a cooling liquid layer on the inner peripheral surface of the drum by centrifugal force, and the cooling liquid layer being formed on the inner circumferential surface of the drum. An apparatus for manufacturing metal, 1111, by reciprocating the injection nozzle of a molten metal injection device in the direction of the rotational axis of the drum, which injects a molten metal jet into a liquid layer, the drum being horizontally rotated, and the molten metal injection device rotational axis direction driving means for driving the nozzle in the rotational axis direction of the drum;
radial drive means for driving the molten metal injection nozzle in the radial direction of the drum; and control for controlling the axial drive means and the radial drive means in accordance with a pre-calculated surface shape of the cooling liquid layer. The gist is to inject molten metal from the molten metal injection nozzle while maintaining a constant distance between the surface of the cooling liquid layer and the tip of the molten metal injection nozzle.

[Function] In the method for producing a thin metal wire of the present invention, the distance between the surface of the inclined cooling liquid layer and the molten metal injection nozzle is kept constant, so this is one of the most important factors in obtaining a thin metal wire. The time from when a certain molten metal is injected as a molten metal jet from an injection nozzle until it is cooled is constant, and a fine metal wire of constant quality can be obtained.

Further, in the thin metal wire manufacturing apparatus of the present invention, the molten metal injection nozzle is driven by an axial drive means and a radial drive means, and these drive means are controlled by following the pre-calculated surface shape of the cooling liquid layer. The molten metal injection nozzle reciprocates in the axial direction while maintaining a constant distance from the surface of the cooling liquid layer. The cross-sectional shape of the cooling liquid layer formed by centrifugal force in a horizontally rotating drum is determined by the following equation from the balance between gravity and centrifugal force, where the y-axis is in the direction of the drum's rotation axis and the X-axis is in the radial direction of the drum's rotation. Calculated by

y=((rR/30)”/2g)x”+c・HHH(1
) In the above formula, π: Pi, R: Drum rotation speed, C
;Constant determined by the internal volume of the drum, amount of cooling water, etc.;
g: acceleration of gravity.

[Advantages of Embodiments] According to the first embodiment of the apparatus of the present invention, there is provided an apparatus for manufacturing thin metal wires in which the inner wall of the drum is inclined to match the surface shape of the cooling liquid layer. Since the depth of the layer can be made constant, there is an advantage that fine metal wires of even better quality can be obtained.

Further, according to a second embodiment of the apparatus of the present invention, there is provided an apparatus for manufacturing fine metal wire, in which an annular member having a side wall inclined in accordance with the surface shape of the cooling liquid layer is detachably attached to the inner wall of the drum. According to this embodiment, it is only necessary to fit an annular member that is parallel to the coolant surface at that time depending on the rotational speed of the drum, so there is no need to rebuild the drum each time the rotational speed of the drum is changed. It has the advantage of being economical.

Furthermore, the third embodiment of the device of the present invention 9. According to the above, there is provided an apparatus for manufacturing a thin metal wire in which a large number of fine wires made of visible wire rods are implanted on the inclined side surface of an annular member, and according to this embodiment, the cast thin metal wire is a fine wire. Since the thin metal wire is gripped by the holding amount, the thin metal wire does not separate from the inner wall of the drum even when the rotation of the drum is stopped, and there is an advantage that the thin metal wire can be collected extremely smoothly from the final end of casting of the thin metal wire.

[Example] Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of one embodiment of the present invention. drum 1
0 is made of stainless steel (SUS304) and has a drum inner diameter of 60 mm.
cm, the inner width of the drum is 20 cm+, and the inner diameter of the cooling liquid outflow prevention plate 16 is 56 cm. The rotational speed of this drum 10 was set to 300 rpm, and cooling water was added to the extent that it slightly overflowed. Therefore, the distance from the center of rotation of the upper part of the cooling water surface is the same as the inner diameter of the cooling liquid outflow prevention plate 16. The axis of rotation of the drum 10 is the y-axis, the x-axis is the radial direction of the drum 10, the origin is the point where the y-axis and the bottom of the drum intersect, and the cross-sectional curve of the water surface is determined using equation (1), y
=<<xR/30)”/2g)(x2-23”)+20
...(2) It is expressed as follows.

Next, a mechanism in which the molten metal injection nozzle 30 reciprocates while maintaining a constant distance from the liquid surface based on the coolant surface cross-sectional curve determined by equation (2) will be described. In FIG. 1, the axial servo motor 40 is connected to the axial slide mechanism 4.
2, the radial slide 81 ellipse 44 lI
& Drive in the linear direction.

The radial servo motor 46 is a radial slide machine f11
A zero rotation axial servo motor 110 and a radial servo motor 46 are connected to a controller 52 and are connected to a controller 52 to radially drive a molten metal injector 26 consisting of a heating coil 48 and a molten metal injection nozzle 30. control is possible.

Therefore, in order to maintain the distance between the molten metal injection nozzle 30 and the cooling liquid surface 24a at 0.3et* in the radial direction of the drum, a program may be written to match the following equation (3).

y= ((πR/ 30 )2/ 2 g)((x+
0.3 )"-23"D 20 (3) Also, calculated from the coolant surface cross-sectional curve obtained from equation (2), the depth from the water surface to the bottom of the coolant liquid Nl24 is 1.
5 am, the removable annular member 54 is attached to the drum 1.
It was installed on the inner surface of 0. The surface shape of the annular member 54 is shown by equation (4) when installed on the inner peripheral surface of the drum 10. The inner surface shape of the drum 10 is as shown in FIG.
It may be processed at a shop that says (A s=←1.- , ;, -!t J-1 S m1Flit Jld ! +, -.

y= ((r R/ 30 )”/ 2 g) ((x
-1,5)"-23")+20...(4) Using the device of this embodiment having the above configuration, F
eyis LoB Ii was melted under the following conditions and a thin metal wire was cast.

Drum rotation speed: 300 rpm Injection pressure: 4.5 kgf/am” Distance II between nozzle and cooling liquid level: 0.3 cm Molten metal temperature: 1250°C Nozzle diameter: 0.15 m-φ As a result, the rotation speed of the drum after casting Even when the drum is decelerated and stopped, the wires do not form into lumps and are deposited on the bottom of the drum.
A gold R thin wire of 00 m was obtained.

Note that, as shown in FIG. 3, the surface of the annular member 54 is coated with 0.
A large number of stainless steel wire rods with a diameter of 11 and a length of 5 ms were planted with a fine wire retention amount of 56, and under the same conditions Fe, sS i+
When oB +s was cast, all the fine metal wires were held by the amount of fine wire held, and even if the drum stopped rotating, the metal wires remained
The wire did not separate from the surface of the annular member 54. After stopping the rotation of the drum, the thin metal wire was collected from the final casting end of the thin metal wire, and it was collected very smoothly without any tangles.

[Effects of the Invention] As explained above, the present invention has been made in view of the fact that in the rotating liquid spinning method in which a drum is rotated horizontally, the surface of the cooling liquid layer is slanted due to the balance with gravity. A method and apparatus for producing thin gold wire in which a molten metal injection nozzle is reciprocated in the width direction of a drum while maintaining a constant distance between an inclined cooling liquid injection surface and a molten metal injection nozzle. Fine metal wire can be smoothly cast without contact between the injection nozzle and the coolant surface. In addition, since the distance from the tip of the molten metal injection nozzle to the surface of the cooling liquid layer is always kept constant, the molten metal will cool and solidify after a certain period of time after the molten metal injection nozzle is injected.
A thin metal wire with a constant shape and quality can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the present invention in which an annular member is fitted onto the inner surface of the drum, FIGS. 2 and 3 are cross-sectional views of a drum according to other embodiments of the present invention, and FIG. 4 is a conventional drum. FIG. 5 is a front view of the fully bent wire manufacturing apparatus, and FIG. 5 is a side sectional view of FIG. 4. 10... Drum, 16... Coolant outflow prevention plate, 24
...Cooling liquid layer, 2411...Cooling liquid level, 26...
・Melting extra length injection device, 30...melting flying wing injection nozzle,
36... Molten metal jet, 38... Metal thin wire, 4
0... Axial direction servo motor, 42... Axial direction sliding equipment, 44... Radial direction servo motor, 46.
... Radial slide mechanism, 48 ... Heating coil, 5
0...Drum inner surface, 52...Controller, 54.
...Annular member, 56...Thin wire holding bristles 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5

Claims (5)

[Claims] (1) Forming a cooling liquid outflow prevention plate on the side of the cylindrical drum,
Rotating the drum to form a cooling liquid layer on the inner peripheral surface of the drum by centrifugal force, and reciprocating an injection nozzle of a molten metal injection device that injects a molten metal jet onto the cooling liquid layer in the direction of the rotational axis of the drum. A method for producing a thin metal wire, the drum being rotated horizontally and the molten metal being jetted while maintaining a constant distance between the surface of the cooling liquid layer, which is inclined due to the gravity of the cooling liquid, and the molten metal jetting nozzle. A method for producing thin metal wire, which comprises injecting molten metal from a nozzle. (2) A cooling liquid outflow prevention plate is formed on the side surface of a cylindrical drum, the drum is rotated to form a cooling liquid layer on the inner peripheral surface of the drum by centrifugal force, and a molten metal jet is injected into the cooling liquid layer. A device for producing fine metal wire by reciprocating the injection nozzle of the metal injection device in the direction of the rotational axis of the drum, the drum being horizontally rotated and the molten metal injection nozzle being driven in the direction of the rotational axis of the drum. a rotating axial drive means; a radial drive means for driving the molten metal injection nozzle in the radial direction of the drum; A thin metal wire characterized in that the molten metal is injected from the molten metal injection nozzle while maintaining a constant distance between the surface of the cooling liquid layer and the tip of the molten metal injection nozzle by a control means for controlling the driving means and the molten metal injection nozzle. manufacturing equipment. (3) The thin metal wire manufacturing apparatus according to claim 2, wherein the inner wall of the drum is inclined to match the surface shape of the cooling liquid layer. (4) The apparatus for manufacturing fine metal wire according to claim 2 or 3, wherein an annular member having a side wall inclined in accordance with the surface shape of the cooling liquid layer is detachably attached to the inner wall of the drum. (5) The apparatus for manufacturing a thin metal wire according to claim 4, wherein a large number of thin wire holding bristles made of flexible wire are implanted on the side wall of the annular member.