JP3047109B2 - Method and apparatus for manufacturing thin metal wires - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing thin metal wires by jetting molten metal into a flowing liquid.

[Conventional technology]

As a method of injecting a molten metal jet stream (hereinafter referred to as “metal jet stream”) into a flowing liquid to form a fine metal wire (in-liquid spinning method), Japanese Patent Publication No. 59-26685 and Japanese Patent Publication No.
No. 0-38228 is known.

Japanese Patent Publication No. 59-26685 is a method of producing a metal fine wire by injecting a metal jet stream into a cooling liquid flowing down in the same direction and at the same speed as the jet stream (hereinafter referred to as "falling-flow method"). The method of flowing the cooling liquid by the falling flow method is to install a pipe below the liquid level of the cooling liquid, overflow the cooling liquid into the pipe, or install an inclined plate in the cooling tank, The method utilizes the natural fall of the cooling liquid, in which the cooling liquid flows down along the inclined plate.

Japanese Patent Publication No. 60-38228 discloses a method for producing a thin metal wire by forming a liquid layer on the drum wall by centrifugal force in a rotating drum and injecting a jet of metal into the liquid layer (hereinafter referred to as a "rotating drum method"). "). This does not make the coolant flow, but rotates the drum itself containing the coolant.

[Problems to be solved by the invention]

In general, in the submerged spinning method, unless the flow rate of the cooling liquid and the flow rate of the jet stream of the metal are substantially the same, the metal solidified in the cooling liquid becomes uneven like a rosary or becomes small pieces. In the submerged spinning method, the wire diameter of the metal is adjusted according to the size of the nozzle diameter from which the molten metal is ejected, but when manufacturing a thin wire diameter, that is, when the nozzle diameter is reduced, the pressure of the metal melting tank is reduced. If it is not raised, the molten metal does not flow out. Therefore, when a thin metal wire is manufactured by the submerged spinning method, the metal jet flow becomes faster.

By the way, in the falling flow method, the cooling liquid flows naturally in the pipe or down the inclined plate, so the speed of the metal jet flow must be adjusted to the speed of the cooling liquid. Met. For this reason, the nozzle diameter of the metal jet flow is limited in the falling flow method, and the types of metal wires that can be manufactured are also reduced.

In the rotating drum method, when the drum is rotated at a high speed, the layer of the cooling liquid is wavy due to the resistance of the air because the surface of the cooling liquid is in contact with the air. When a jet stream of a metal is injected into a wavy cooling liquid, the metal wire becomes uneven or cut, and a uniform and long metal wire cannot be obtained. In addition, since the metal wires are stored in the drum, when the metal wires are manufactured in large quantities and continuously, the manufactured metal wires are accumulated in the drum, and when the metal wires are deposited, the metal wires finally reach the liquid level. It will come out and cooling will not be possible. For this reason, the position of the nozzle of the metal jet stream is moved in the drum so that the metal wire does not collect in one place. However, there is still a limit, and a large amount of metal wire cannot be manufactured. Furthermore, in the rotating drum method, the metal wire housed in the drum must be taken out of the drum and rewound on the reel, but at this time, the thin metal wire may become entangled,
Often it was cut.

According to the present invention, even if the speed of the jet stream of the metal is changed, the speed of the cooling liquid can be adjusted to the speed, and not only the metal wire of any wire diameter can be easily manufactured, but also the finished metal wire can be directly used as it is. An object of the present invention is to provide a method of manufacturing a thin metal wire which can be wound around a winding frame and an apparatus therefor.

[Means for solving the problem]

The present inventors have completed the present invention by noting that the speed of a liquid can be adjusted in any manner by using a pump.

The present invention is directed to a method in which a coolant is caused to flow in an arc-shaped pipe with a flow rate adjusted by a pump, and a molten metal jet placed above a molten metal injection portion formed at the other end of the pipe. A method for producing a thin metal wire, characterized in that a molten metal is ejected from a nozzle, and the molten metal is injected into a flowing cooling liquid and rapidly cooled to form a continuous wire, and a pump is installed at one end. Arc-shaped pipe, a molten metal injection section formed at the other end of the pipe, a molten metal ejection nozzle installed above the injection section, and a recovery tank for collecting a coolant flowing out of the injection section. An apparatus for manufacturing a thin metal wire.

In the present invention, since the cooling liquid flows in the pipe, the flowing liquid has little turbulence.However, when the pipe is formed in an arc shape, the cooling liquid flows by pushing the outside of the pipe by centrifugal force and flows. Can be further stabilized.

[Action]

Since the liquid in the pipe is caused to flow by the pump, the flow rate of the liquid can be adjusted to the flow rate of the metal jet stream.

When the coolant is discharged from the pipe, the coolant is brought into an open state unaffected by the surroundings, so that the metal wire in the coolant can be easily taken out.

〔Example〕

 Hereinafter, the present invention will be described with reference to the drawings.

The pipe 1 has a substantially 1/12 arcuate curved shape, and a pump 2 is installed at the upper end. At the lower end of the pipe, the inside of the pipe is open where the slope is about 30 degrees, the outside of the pipe becomes a gutter 3 and the arc continues, and when the slope of the lower end is about 30 degrees, the outside of the gutter is Extends tangentially.

The opening of the pipe is a molten metal injection part 4. Above the injection section 4, a metal melting tank 6 having a nozzle 5 at the bottom
Is installed. The metal melting tank 6 is heated by the heating device 7 to melt the metal inside and to keep the melted metal 8 at a constant temperature. The metal melting tank is configured to apply a pressure (arrow) by a gas pressure source (not shown) to cause the melted metal to flow out of the nozzle 5 at a constant speed. A recovery tank 10 for recovering the cooling liquid 9 flowing out of the pipe 1 is provided in front of the metal injection part 4, that is, in the flowing direction of the cooling liquid. The recovery tank 10 is a circulation pipe 11
Is connected to the pump 2. Above the coolant flowing out of the curved pipe, a winding frame 12 capable of winding a metal wire is provided.

Next, a method for manufacturing a thin metal wire by the above-described apparatus for manufacturing a thin metal wire will be described.

First, the pump 2 is rotated so that the coolant 9 flows in the pipe 1 and flows out from the opening of the pipe. At this time, since the cooling fluid flows under pressure in the curved pipe under the pressure of the pipe, the cooling fluid flows out of the pipe on the gutter 3 outside the pipe without disturbance. A jet stream of the molten metal is injected from the nozzle 5 into the stream without turbulence. The flow rate of this jet stream must be substantially the same as the flow rate of the coolant, but to adapt them, the rotation of the pump is adjusted so that the flow rate of the coolant matches the flow rate of the jet stream. When the jet stream is injected into the flowing cooling liquid, it instantaneously solidifies and becomes a continuous metal wire W, which is immediately wound up by the reel 12 installed in front of the opening. The coolant 9 flowing out of the curved pipe 1 is collected in a collection tank 10 and returned to the pump 2 by a circulation pipe 11.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, since the flow velocity of a cooling liquid can be matched with the flow velocity of a jet flow, a thin metal wire with a uniform wire diameter can be obtained without forming irregularities or short pieces. In addition, since the speed of the cooling liquid can be appropriately adjusted, a nozzle having any diameter can be used, and metal wires having various wire diameters can be manufactured. Furthermore, since the cooling liquid can flow in an open state, the metal wire can be easily taken out, so that it can be wound on a bobbin immediately after production, and problems such as entanglement and disconnection do not occur. It has an excellent effect that is not found.

[Brief description of the drawings]

 FIG. 1 is a schematic view of an apparatus for manufacturing a thin metal wire according to the present invention. DESCRIPTION OF SYMBOLS 1 ... Pipe 2 ... Pump 3 ... Gutter 4 ... Molten metal injection part 5 ... Nozzle 6 ... Metal melting tank 7 ... Heating device 8 ... Molten metal 9 ... Cooling liquid , 10… Coolant recovery tank 11… Circulation pipe, 12… Reel, W… Metal wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B22D 11/01 D01F 9/08 D01D 5/088

Claims (2)

(57) [Claims] A coolant is caused to flow through an arc-shaped pipe with a flow rate adjusted by a pump, and a molten metal jet is provided above a molten metal injection portion formed at the other end of the pipe. A method for producing a thin metal wire, comprising: ejecting a molten metal from a nozzle, injecting the molten metal into a flowing cooling liquid, and quenching the molten metal to form a continuous wire. 2. An arc-shaped pipe having a pump installed at one end, a molten metal injection section formed at the other end of the pipe, a molten metal jet nozzle installed above the injection section, and an injection section. An apparatus for manufacturing a thin metal wire, comprising a recovery tank for recovering the coolant flowing out.