JPS59129762A - Production of thickly plated metallic wire by molten metal - Google Patents

Abstract

PURPOSE:To obtain a thickly plated metallic wire having a smooth surface by inserting a metallic wire advanced into a molten metal into the hole formed between two grooved and water-cooled rolls and adhering the solidified metal thereon. CONSTITUTION:Two water cooled rolls 6, 6 are pressed to each other and are disposed in a tank 1 filled therein with a molten metal 2, in such a way that the line connecting the central axes thereof is positioned on the liquid surface. A groove 8 having a semicircular sectional shape is provided circumferentially on the outside circumferential surface of each roll, and a circular hole part 7 is formed in each contact part. A metallic wire 3 having the m.p. higher than the m.p. of the metal 2 is advanced into the metal 2 and is conducted, via a guide roll 5, to the inserting hole part 7 between the rolls 6 and 6. The metal 2 solidifies and grows along the groove 8 according to the rotation of the rolls 6, 6, and the solidified metals and the wire 3 are adhered to each other near the inserting hole and the metallic wire is pulled up as a plated metallic wire 4. A thick plating film is easily formed by the above-mentioned method.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing thick plated metal wire using molten metal.

Generally, the hot-dip plating method using molten metal involves introducing a metal wire 3 into the molten metal in a tank 1 in the direction of the arrow and adhering the molten metal to the metal wire via a guide roll 5, as shown in FIG. A plated metal wire 4 was obtained by forming a plated layer.

However, in this method, the surface of the plated layer of the plated metal wire obtained is not smooth because it solidifies freely.
Since the molten metal falls when the metal wire is pulled up, more than a certain amount is not plated, making it difficult to obtain a thick plating film.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a thickly plated metal wire, which eliminates the drawbacks of the prior art described above and provides a thick plated coating with a smooth surface on the metal wire.

That is, the gist of the present invention is to use two water-cooled rolls with grooves, to insert the metal wire that has entered the molten metal between the holes formed by the contact between the two rolls, and to cool the metal wire. The point is that plating is performed while adhering solidified molten metal to the surrounding area using each roll.

Embodiments of the present invention will be described in detail below with reference to the drawings. In FIG. 2, a tank 1 is filled with molten metal 2. Two water-cooled rolls 6.6 each having a groove 8 with a semicircular cross section in the circumferential direction on one-sided circumferential surfaces are in contact with each other to form a circular hole 7. The rolls are arranged so that the line connecting center #4 (1) is located at the liquid level of the molten metal. 5 indicates a guide roll, and metal wire 3
It is set at an appropriate position so as to guide the water into the hole between the water-cooled rolls 6.6.

In the above configuration, a metal wire 3 having a higher melting point than the molten metal, that is, having different characteristics, is attached to the molten metal in the tank 1. Subsequently, the metal wire is introduced through the guide roll 5 into the insertion hole between the water-cooled rolls.

Since the water-cooled roll is still rotating in the direction of the arrow, the molten metal solidifies and grows along the grooves of the roll, and the solidified metal and the metal wire are bonded to each other at the point of contact between the rolls, that is, near the insertion hole, and the plated metal flows upward. When it becomes line 5 and is pulled up, it becomes ＼.

At this time, it is possible to obtain a plating film of any thickness by changing the roll rotation speed, amount of water cooling, and hole diameter.

In addition, the water-cooled roll uses a highly thermally conductive metal only in the grooves 8 to make it easier to solidify, and by using heat insulating material on the other roll surfaces, a plating film can be formed in accordance with the hole shape. is possible.

However, the solidification of the molten metal is usually formed below the area where the roll surface contacts, and some rolling is also performed at the area where the roll surface contacts, resulting in good adhesion between the metal wire and the molten metal.

Further, the plated wire thus obtained may be rolled or drawn to form a fine wire. At this time, diffusion heating may be performed to further strengthen the adhesion.

Incidentally, in the above embodiment, the wire to be plated is a round wire, but this is not necessarily the case, and the shape may be any shape, and the shape after plating can be changed arbitrarily by changing the shape of the groove. I can do it.

As described above, according to the present invention, a thick plating film can be easily obtained, and for example, a Zn-plated #1 wire can be peeled off with a dramatic improvement in corrosion resistance. In addition, since the present invention has a mechanism that solidifies molten metal on the metal wire roll, plated wire can be manufactured by heating and drawing the material after making the material, even in combinations where conventional hot-dip plating had poor adhesion. It is also possible to do so.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of an apparatus showing a conventional hot-dip plating method. FIG. 2 is a sectional view of an apparatus showing an embodiment of the present invention. FIG. 3 is a cross-sectional view of the water-cooled roll shown in FIG. 2 in the liquid surface direction. Symbol in the diagram

Claims (1)

[Claims] A metal insertion hole is formed by bringing two water-cooled rolls having grooves along the circumferential direction of their outer peripheral surfaces into contact with each other, and a line connecting the central axes of both rolls is located near the liquid surface of the molten metal. A dissimilar metal wire guided into the molten metal is passed through the insertion hole, and the molten metal is solidified around the metal wire while moving the metal wire as the water cooling roll rotates to form a thick plating film. A method for producing thick plated metal wire using molten metal, characterized by: