JPS6116217B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing linear or strip-shaped metal fibers or foil pieces directly from molten metal.

Conventionally, as a method for directly manufacturing linear or band-shaped fibers from molten metal,
As described in Japanese Patent No. 22898, a hanging method (pendant drop method) is known in which a metal wire is melted and brought into contact with the outer circumferential protrusion of the disk to solidify the metal on the outer circumferential protrusion surface.

However, the disadvantage of the hanging method using such strands is that the productivity is low.Generally, the strands used in the hanging method are supplied from a coil winding supply source through a straightening machine, and the handling of the strands The maximum diameter is 5 to 6 mm, and if the diameter is larger than this, it is difficult to straighten with a normal straightening machine and the straightening work is dangerous. When melting a wire of the same diameter, the molten droplet becomes spherical, and the number of protrusions or ridges on the disk with which the lower end can come into contact is limited, making it possible to produce fibers with four or more threads from a single wire. Moreover, it is necessary to adjust the feeding speed of the wire by slowing it down, and as a result, the production volume is the same as when the feeding speed of the conventional wire with a diameter of 5 mm is increased. It was hot.

The present invention was made in view of the above points, and
The purpose is to improve fiber production by supplying multiple strands side by side.

The present invention will be described below with reference to embodiments shown in the drawings.

In the drawings, reference numeral 1 indicates a disc-shaped or cylindrical rotating tool (herein referred to as a disk) made of copper, steel, or other metal with good thermal conductivity.
As is known, a large number of protrusions or protrusions 2 are provided on the outer periphery, either continuously or with an appropriate length in the circumferential direction, corresponding to the desired fiber length, and cooling water is passed through the inside through a cooling water pipe 3. It is constructed as such and is rotated by a suitable motor 4.

Reference numerals 5 and 6 denote metal wires to be melted, and in the illustrated example, they are heated at an appropriate angle α ₁ ( 0° < α ₁ < 60° (especially preferably 15°), and α ₂ (0° < α ₂ <
The strands are fed at an angle of 30° (particularly preferably 10° to 15°), and the tips of the strands, that is, the feeding ends are positioned above the disk 1.

A torch 10 and a wall ground 11 are provided at opposing positions on both sides of the supply ends of the wires 5 and 6. The torch 10 is made of tungsten with a diameter of 3.2 mm, for example, and is supplied with an impurity such as argon through a tube 12. The torch 10 is structured to supply active gas, and the torch 10 is connected to the negative electrode of the melting power source 13. Also, torch 10
The tip is configured to be able to vibrate or move back and forth vertically and horizontally with respect to the supply end where the wires 5 and 6 are lined up, whereby one torch 10 melts both wires and forms two spherical molten droplets. The molten droplets are brought into contact with a large number of protrusions 2 in the form of rugby ball-shaped molten droplets.

The wall ground 11 surrounds the copper plate 14 with a monolithic refractory 15 so that cooling water can circulate therein, and is connected to the positive electrode of the melting power source 13. This positive electrode is connected to the wires 5, 6 at points 16, 17 at a suitable distance from the supply ends of the wires 5, 6, as shown in the drawing.

In the illustrated example, the two wires 5 and 6 are fed at an appropriate angle so as to converge at the feeding end.
It is also possible to supply a plurality of strands, such as two or three.

According to the above-mentioned configuration, the wires 5 and 6 are continuously fed out, and the torch 10 is vibrated or reciprocated with respect to the supply end, so that the wires 5 and 6 are fed out from the torch 10.
An arc is generated at the supply end of the disk 1 to melt both the wires, and as mentioned above, the rugby ball-shaped molten droplets extending laterally are brought into contact with several protrusions 2 on the disk 1, and these protrusions 2 A continuous or predetermined length of fiber 18 is manufactured as shown in the figure.

FIG. 2 shows an example in which one torch 10 is provided for each of the wires 5 and 6.

Example 1 Element wire SUS304 5.5mmφ Wire feeding speed 220mm/min 2 disk peripheral speed 10m/sec Arc (20V) 90 amperes 3.2mmφ electrode Argon 15/min Fiber diameter 50 to 70μφ According to the present invention, 3 to 6mm diameter By using a plurality of strands of wire, the molten metal can be spread laterally, and for example, 10 to 20 fibers can be manufactured at the same time, making it easy to handle and increasing production volume.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment according to the present invention, and FIG. 2 is a schematic diagram showing another embodiment. 1...Disc, 2...Protrusion, 3...Cooling water pipe, 5,
6... Element wire, 7, 8... Straightening roller, 10... Torch,
11...Wall ground, 13...Dissolving power source, 18...Fiber.

Claims (1)

[Claims] 1. A method of manufacturing a fiber by melting a metal wire, bringing the molten metal into contact with the outer periphery of a disk rotating at high speed, and cooling and solidifying the metal,
Multiple strands of wire are lined up and fed above the casting tool,
1. A method for producing metal fiber, which comprises melting a wire by an arc between a torch and a torch.