JPH04127941A - Production of metal fine wire - Google Patents

Abstract

PURPOSE:To continuously produce a wire rod of the constant quality by injecting a molten metal in a fine stream state from the inner circumferential face side of cooling liquid layer flowing down while circling along the inner circumferential face of a cylindrical body. CONSTITUTION:The cooling liquid injected from a cooling liquid injection hole 4 flows down while revolving along the inner peripheral face of cylindrical body 1, and the cooling liquid layer 5 having the fixed inner diameter is formed with action of centrifugal force of revolving flow. Successively, the prescribed medium is supplied to an injection crucible 6 inserted to the upper part of the cylindrical body 1, and the molten metal 10 in the crucible is injected as the fine stream state from the nozzle hole 8 and allowed to flow in the cooling liquid layer 5. The fine stream-state molten metal is rapidly cooled with the cooling liquid and solidified to make the metal fine wire. This metal fine wire is discharged from opening hole at the lower end of the cylindrical body 1 together with the cooling water for forming the cooling liquid layer 5 and received with a net-body, etc., arranged at the lower part of the cylindrical body 1 to separate and recover the metal fine wire and the cooling liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for directly producing thin metal wires by injecting molten metal into a cooling liquid layer in a trickle.

(Prior Art and Problems) As a preferred method for manufacturing amorphous and high-strength thin metal wires, as disclosed in Japanese Patent Publication No. 60-38228,
There is a method of manufacturing thin metal wires by forming a cooling liquid layer on the inner peripheral surface of a drum rotating at high speed by centrifugal force, injecting a stream of molten metal into the cooling liquid layer, and cooling and solidifying the liquid.

However, the soft soil method requires batch operation, and the rotation of the drum must be stopped each time the wire is taken out from the drum, resulting in poor productivity. In addition, in order to manufacture homogeneous wire, it is necessary to maintain a constant temperature of the cooling liquid layer in the drum, which requires a drum cooling mechanism and a cooling liquid discharge and supply mechanism, making the manufacturing equipment and operations complicated. Become. In addition, there is a problem in that the liquid level of the coolant layer is disturbed when the coolant is discharged and supplied, and the quality of the wire rod is not constant.

The present invention was made in view of such problems, and an object of the present invention is to provide a method that allows continuous production of wire rods of constant quality using a simple device.

(Means for Solving the Problems) In order to achieve the above object, the method for manufacturing thin metal wires of the present invention involves injecting a molten metal in the form of a trickle into a cooling liquid layer moving at high speed, cooling and solidifying the metal. In a method for producing a thin metal wire, a cooling liquid is jetted and supplied along the inner peripheral surface of a cylinder to form a cooling liquid layer that flows down while swirling along the inner peripheral surface of the cylinder. The structure of the invention is to inject the molten metal in a trickle from the inner peripheral surface side.

(Function) The coolant jetted and supplied along the inner circumferential surface of the cylinder 1 flows down while swirling along the inner circumferential surface of the cylinder, and due to the action of the centrifugal force during the swirl, a coolant layer with an approximately constant inner diameter is formed. form 5. Since this cooling liquid layer 5 is always formed by newly supplied cooling liquid, a constant temperature can be easily maintained. Therefore, there is no need to drain or supply cooling liquid from the liquid level for temperature control, and the liquid level is not disturbed and remains in a stable state. Therefore, the molten metal injected into the cooling liquid layer 5 always enters the cooling liquid layer 5 under a constant condition and is cooled and solidified at a constant temperature, so that the quality of the wire rod is stabilized.

Further, the wire rod in the cooling liquid layer 5 flows down while swirling together with the cooling liquid, and is discharged from the lower end of the cylinder 1, so that continuous production of the wire rod is possible.

(Embodiment) Fig. 1 shows the main part of an apparatus for carrying out the present invention, which includes a cylinder 1 whose cross section is circular and whose diameter gradually decreases from the upper part to the lower part. A lid 2 having an appropriately sized insertion hole 3 in the center is attached to the upper end of the lid 1 .

A coolant jet hole 4 is provided on the outer peripheral side of the upper end of the cylinder 1 for jetting and supplying a coolant from a tangential direction along the inner peripheral surface of the cylinder, and is connected to a discharge port of a pump (not shown) through piping. has been done.

The coolant spouted from the coolant jet hole 4 along the inner circumferential surface of the cylinder 1 flows down while swirling along the inner circumferential surface of the cylinder 1, and the coolant has a constant inner diameter due to the centrifugal force of the swirling flow. Layer 5 is formed. The cooling liquid flowing down from the lower end opening of the cylinder body 1 is appropriately collected in a tank and is circulated and supplied to the pump. On this occasion,
A cooler may be appropriately interposed in the tank or in the middle of the circulation path.

Water is used as the cooling liquid.

In addition, the horizontal distance from the center line of the cylinder to the inner circumferential surface of the cooling liquid layer is r
(constant), when the flow rate from the pump is Q and the distance downward from the top of the cylinder is y, the shape of the inner peripheral surface of the cylinder, that is, the horizontal distance R from the center line of the cylinder to the inner peripheral surface is a function of y. is roughly given by the following formula.

However, g is the gravitational acceleration. An injection crucible 6 as a means for supplying molten metal is inserted into the insertion hole 3 of the lid 2, and a heating coil 7 is wound around the outer periphery of the crucible 6, and a nozzle hole in the lower side wall of the crucible 6 is inserted into the insertion hole 3 of the lid 2. 8 have been established. Molten metal or solid metal is supplied to the injection crucible 6, and is kept warm and melted by the heating coil 7. 9 is a pressure medium supply port, and as the pressure medium, an inert gas such as argon gas is usually used. Note that molten metal may be directly injected under pressure as the pressure medium.

To carry out the present invention using the above-mentioned apparatus, first, the pump is operated to form a cooling liquid layer 5 flowing down on the inner circumferential surface of the cylinder 1 while swirling at high speed.

Next, a pressurized medium is supplied to the injection crucible 6 inserted into the upper part of the cylinder 1, and the molten metal 10 in the crucible is ejected in the form of a trickle from the nozzle hole 8 and flows into the cooling liquid layer 5.

The molten metal in the form of a trickle is rapidly cooled by a cooling liquid and solidifies into a thin metal wire. The thin metal wire is discharged from the lower end opening of the cylinder 1 together with the cooling water forming the cooling liquid layer 5, and is stopped by a rope or the like provided below the cylinder 1, separated from the cooling liquid, and collected. .

In the above embodiment, a funnel-shaped cylinder was used as the cylinder l, but
As shown in FIG. 2, it may be cylindrical.

A ring 21 for adjusting the layer thickness of the cooling liquid layer 5 is attached to the inner circumferential surface of the lower end of the cylindrical body 1 via a port 22 so as to be detachable and replaceable.

(Effects of the Invention) As explained above, the method for producing a thin metal wire of the present invention includes jetting and supplying a cooling liquid along the inner circumferential surface of a cylinder, and cooling liquid flowing down while swirling along the inner circumferential surface of the cylinder. Since a liquid layer is formed, the temperature of the cooling liquid layer is easily kept constant, and the liquid level is also kept stable. Therefore, by injecting a trickle of molten metal into the cooling liquid layer, a fine metal wire of constant quality can be easily produced. Further, since the thin metal wire in the coolant layer is discharged from the lower end of the cylinder together with the coolant, continuous production of the thin metal wire is possible, resulting in excellent productivity. Moreover, when carrying out the present invention, an apparatus for carrying out the invention can be easily constructed from a cylinder and a pump, and the equipment cost is also low, making it economical.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of an apparatus for implementing the present invention, and FIG. 2 is a sectional view of a main part of another implementation apparatus. 1... Cylindrical body, 5... Cooling liquid layer.

Claims (1)

[Claims] (1) In the manufacturing method of thin metal wire, in which a thin metal wire is obtained by injecting molten metal in a thin stream into a rapidly moving cooling liquid layer and cooling and solidifying the metal, the cooling liquid is jetted and supplied along the inner circumferential surface of a cylindrical body. 1. A method for producing a thin metal wire, comprising: forming a cooling liquid layer that flows downward while swirling along the inner peripheral surface of a cylinder; and injecting molten metal in a trickle form from the inner peripheral surface side of the cooling liquid layer.