JPS63273554A - Direct production for direct strand wire - Google Patents

Abstract

PURPOSE:To quicken production speed and to reduce production cost by injecting molten metal into cooling liquid layer from plural nozzles and swinging a molten metal vessel at the verosity fixed by the specific equation. CONSTITUTION:A rotating drum 1 for forming cooling liquid layer 2 in an inner wall by centrifugal force is prepared. The molten metal 5 is injected into the liquid layer 2 from the molten metal vessel 3 having plural nozzles 1 as plural jet flows. The jet flows are immersed into the liquid layer 2 and changed into the jetting state, film boiling state (a), over cooling liquid state (b) and fine wire of solid state (c). Then, as the molten metal vessel 3 is rotated at the fixed verosity Vr showing in the equation I, strand wire having desirable pitch P is formed by the fine wires 11. By this method, the production speed of the strand wire is quickened and the production cost is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method for producing stranded wire directly from molten metal.

[Prior Art] Conventionally, a method has been known in which metals, alloys, etc. are melted and the molten material is jetted into a rotating coolant to obtain a thin wire.

For example, there is a spinning method known in Japanese Patent Application Laid-Open No. 55-641348. Various improvements have been made to this method; for example, in JP-A-61-135457, a drum with a tapered inner wall is used to continuously take out fine wire, and in JP-A-60-152,346, the inner periphery of the drum is removed. A method is disclosed in which a continuous or discontinuous partition plate is provided around the surface so that a long fine line can be obtained with an arbitrarily wide drum. However, although fine metal wires are mostly used with secondary processing such as stranding or weaving rather than being used alone, fine wires that have been subjected to such secondary processing are not used directly from molten metal. There was no manufacturing process.

[Problems to be Solved by the Invention] The present invention provides a method for producing stranded wire with a predetermined pitch controlled directly from a molten metal by spinning in a rotating liquid.

[Means and effects for solving the problem] The present inventors have been concerned with how long and continuous one continuous thin wire can be collected in the longitudinal direction using the conventional manufacturing apparatus of the one-turn submerged spinning method. In contrast, the present invention aims to provide a stranded wire shape that is highly usable as a final product. In order to produce the product more directly, the molten metal container equipped with the nozzle 6 is rotated at a rotation speed determined by the jet speed and the twist pitch so as not to cause eccentricity in the vertical and horizontal directions.

The main content is that a liquid layer 2 is formed by centrifugal force in a cylindrical drum 1 that rotates once, and metal is injected into the liquid layer 2 from a melting container 3 having a nozzle 6 to solidify the molten metal 5. A plurality of nozzles 6 in a method of manufacturing fine metal wire
The molten metal container 3 is rotated at a speed determined by the following formula so that the molten metal 5 ejected from the cooling liquid layer 2 is twisted from the supercooled liquid state B to the solid state C after entering the cooling liquid layer 2. This is a method for producing directly stranded wire.

Vr: Turning speed (rpa+) vj Nijet speed (a/s) P: Twisting pitch (+am) Next, the present invention will be explained with reference to the drawings. FIG. 1 is a diagram schematically showing a situation in which molten metal 5 enters cooling liquid layer 28 through nozzle 6. Multiple jet streams lO
After entering the cooling liquid layer, it changes from liquid → film boiling state a → supercooled liquid state → solid state C. Here, film boiling wA
A is a state in which vaporization occurs from the surface of a thin jet stream, a suitably cooled liquid state is a state in which the disordered atomic arrangement of a liquid state is maintained until below the melting point, and a solid state C is a state in which atoms or molecules Refers to a state where the arrangement relationship of is constant.

At this time, the rotation speed of the molten metal container is controlled so that the twisting process is applied after the molten metal is in an appropriately cooled liquid state.

This control is performed, for example, by rotating the molten metal container 3 itself via the gear 7, as shown in FIG.
If the twisting process is applied in the state of a high-temperature liquid jet or film, the fibers will be scattered due to the collision of the jets and will not form a thin wire shape.

Therefore, the twisting process must be applied in an appropriately cooled liquid state or a solid state.In the appropriately cooled liquid state, it is possible to bond the thin wires to each other, but after they have completely solidified, the thin wires do not bond to each other. .

After manufacturing, a method of applying tension and adhesion must be added.

The number of nozzles 6 is 2 to 10, preferably 3 to 6. It is appropriate to have 3 or more stranded wires, and 1o or more nozzles.
This is not preferable because collisions between the jet streams occur and the cooling effect decreases.

The rotation speed Vr of the molten metal container 3 is determined by the jet speed Vj (
m/5ec) and the desired twisting pitch P(-1), it is defined by the following formula.

j Vr=6X10'-X-(rp@)-=... (1) Here, the jet speed is 3 to 10 m/sac, preferably 5 to 8 m/see. Below 3 m/sac, the laminar jet flow is particularly undesirable; above 10 m/sac, the pressurizing force becomes too large and the molten metal container will be damaged if it is not strong, which is undesirable, and the twist pitch is 1 for practical reasons. ~50 meters, preferably 5 to 20 meters.

A Vr of less than lam or more than 50 ag+ is not practical as a stranded wire, and is 3,600 to 60,000 rpm based on the above conditions and the general motor rotation speed.

With such a method and apparatus, by directly twisting the molten metal into a stranded wire shape at a desired pitch, it is possible to obtain a fine wire with high added value.

The operation of the apparatus will be explained below using one embodiment of the apparatus of the present invention.

FIG. 2 is a longitudinal sectional view for explaining one embodiment of the present invention. Here, a rotating drum 1 is used, in which a liquid layer 2 is formed on the inner wall by centrifugal force. In this liquid layer 2, the molten metal 5 is passed through the molten metal container 3 or 63 nozzles 6.
into the liquid layer 2 as three jet streams. After entering from the cooled liquid surface, the jet flow changes from a jet state to a film boiling state a to a supercooled liquid state to a thin line of solid state C.

The molten metal container 3 is rotated at a constant speed via a gear 7 to produce a stranded wire with a desired pitch directly from the molten metal.

[Example] 1. A cooling liquid was formed in a rotating drum with a drum diameter of 600 mm by applying Ar gas pressure to a molten Fe-5i-B alloy (amorphous component) through a three-hole nozzle with holes of 0.1 ma+ diameter. The layer was jetted at an angle of incidence of 45°. Peripheral speed of drum 5 m/see, speed of jet flow 5 m/see
sac.

At a crucible rotation speed of 30,000 rpm, it was possible to obtain 200 g of stranded wire with a pitch of approximately 1 cm (third time).

2. Charge the molten Fa-3i-B alloy, co-5i-8 alloy, and Pd-Cu-Si alloy separately into three crucibles with holes of 0.1 mm diameter, and At from the nozzle
By gas pressure.

The coolant was jetted at an incident angle of 45° into a cooling liquid layer formed in a rotating drum with a drum diameter of 300 mm. The three crucibles were fixed on the same base at the top and rotated at a constant speed. Circumferential speed of drum 3m/sac, speed of jet flow 3m/s
ee, approximately 5I at crucible base rotation speed of 36,000 rpm
I was able to obtain a stranded wire with 11 pitches.

(Figure 41).

[Effects of the Invention] As is clear from the above examples, the present invention provides a method for spinning molten metal equipped with 2 to 10 nozzles in a rotating liquid spinning method in which fine wire is directly produced from molten metal through a nozzle. The industrial effect is extremely large in that a stranded wire with a desired pitch can be produced directly from molten metal at low cost and quickly by rotating the container at a constant speed.

[Brief explanation of the drawing]

Figure 1: From the molten metal container through the nozzle. A schematic diagram of the part where the metal jet enters the cooling liquid layer. Figure 2 is a longitudinal cross-sectional view of the equipment as an example of realizing this process. Figures 3 and 4 are the drums expanded into a flat surface. FIG. 2 is a diagram schematically showing the intrusion path of a jet and the state of the twisted wires formed. 1: drum, 2: liquid layer, 3: molten metal container. 4: heating device, 5: molten metal, 6: nozzle, 7: gear,
8 Ni drum rotation motor, 9: Frame, lO Nijit flow, 11: Jllm, a: n! a88 state, b = supercooled liquid state, c: solid state, d: high temperature jet stream.

Claims (1)

[Claims] A molten metal container 3 in which a liquid layer 2 is formed in a rotating cylindrical drum 1 by centrifugal force, and a nozzle 6 is provided in the liquid layer 2.
In the method of manufacturing a fine metal wire by injecting metal from a plurality of nozzles 6 and solidifying the molten metal 5, the molten metal 5 injected from a plurality of nozzles 6 enters the cooling liquid layer 2 and then changes from a supercooled liquid state B to a solid state C. A method for producing a directly stranded wire, characterized in that the molten metal container 3 described above is rotated at a speed determined by the following formula so that the stranding process is applied at . Vr=6×10^4 (Vj/P) Vr: Turning speed (rpm) Vj: Jet speed (m/
s) P: Twisting pitch (mm)