JPS636965B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for anticorrosion treatment of stranded metal wires such as copper, aluminum, steel, etc., and its purpose is to form a uniform anticorrosion treatment layer to the inside of the strands. Conventionally, corrosion protection treatment of stranded metal wires such as copper, aluminum, steel, etc. is carried out on single wires or after forming into stranded wires. However, in the case of single wire treatment, the anti-corrosion treatment layer is destroyed by rubbing against various parts of the manufacturing equipment during subsequent processing steps. On the other hand, when anti-corrosion treatment is applied after forming a stranded wire, it is difficult for the treatment liquid to penetrate into the inside of the stranded wire, and the treatment liquid does not penetrate into the contact area between the strands, resulting in uneven treatment. . In particular, when stranded wires are exposed to a corrosive environment, corrosion is most likely to occur at the contact areas between the strands, and it is well known that a phenomenon called crevice corrosion occurs there. In view of the current situation, the inventor of the present application investigated the best treatment method throughout the entire manufacturing process and found that it is most effective to perform anti-corrosion treatment on the single wire and at each twisting end of the wire twisting machine. , invented a method that can be applied in practice. Hereinafter, the effects will be explained in detail using examples. Embodiment In FIG. 1, which shows an apparatus suitable for implementing the present invention, a central wire 1 is a copper wire having a thickness of 2.6 mm, for example, and is drawn out from a bobbin 2 in the direction of the arrow. 3 is an inner layer stranded wire cage, through which the strand 1 passes through the center of rotation.
Element wires 4 (copper wires 2.6 mm) for forming the inner layer are pulled out from six bobbins (not shown) in the cage 3 and supplied to the drawing die 5. 6 is a twisted wire in which six strands 4 are twisted around a central strand 1. Reference numeral 7 denotes an outer layer stranded wire cage, through which the stranded wire 6 passes through the center of rotation, and is provided with, for example, 12 bobbins inside, and from each bobbin a wire 8 for forming the outer layer is supplied to a drawing die 9. Reference numeral 10 denotes a stranded wire in which an outer layer consisting of 12 strands 8 is formed around a stranded wire 6, and this stranded wire 10 is passed through a dryer 11 and wound onto a winding drum 12. 14, 15, and 16 are anticorrosive treatment devices, each having a treatment liquid reservoir 17, a liquid receiver 18,
It is composed of a return pipe 20 having a pump 19 in the middle for returning the liquid in the liquid receiver 18 to the processing liquid reservoir 17, and a ventilation duct 21. The processing liquid reservoir 17 is equipped with a shower nozzle 22 at the lower end, and the duct 21 A blower may be placed in the middle of the road as necessary. Processing liquid reservoir 17
The processing liquid inside may be dripped from the nozzle 22, or may be pressurized by the pump 19 and then forcibly sprayed onto the strands or strands. The center strand 1 is placed in the cage 3 for inner layer stranding in the state of strand.
Immediately before this, the anticorrosive agent is dripped from the nozzle 22 of the anticorrosive treatment device 14 for treatment. The anticorrosive agent adheres to the entire outer periphery of the wire 1. The inner layer strands are treated by dropping a corrosive agent at the point where the strands 4 are gathered just before the drawing die 5. That is, the anticorrosive agent is dripped from the nozzle 22 of the processing device 15 and adheres to the entire outer peripheral surface of all the wires 4. As with the inner layer strands, the outer layer strands are treated by dropping an anticorrosive agent just before the drawing die 9, and also immediately after passing through the drawing die 9, the anticorrosive agent is dropped from the nozzle 22' of the treatment liquid tank 17'. It is then dried by a dryer 11 and wound up by a drum 12. In addition, as the anticorrosive agent to be applied, for example, the following can be used. For copper stranded wire; Thiazole, 1,2,3-benzotriazole, imidazole, benzimidazole, Milicon oil, etc. For aluminum stranded wire; Tolutriazole, silicone oil, etc. For steel stranded wire; Comparison of machine oil, grease, etc. Example 1 Wires are twisted together after being subjected to anti-corrosion treatment. Comparative Example 2 Wires were subjected to anti-corrosion treatment all at once after being twisted. The results of the anticorrosion performance test of the stranded wires manufactured in Examples and Comparative Examples 1 and 2 are shown in the table. This test is long
Each sample of the 30 cm Example and Comparative Example was exposed to a high temperature, high humidity environment of 70° C. and 95% humidity for 10 days, and then disassembled and investigated.

【table】

[Table] As shown in the table, it can be seen that the anticorrosion performance is improved by performing the anticorrosion treatment using the method of the example, compared to the conventional method shown in the comparative example. As explained above, according to the present invention, a metal stranded wire consisting of multiple layers is formed by twisting a plurality of strands around a central strand in multiple stages using a plurality of sets of stranding cages and drawing dies. When doing so, apply an anticorrosive agent to the entire surface of the center wire just before the cage for stranded wire in the first stage, and apply the anticorrosive agent to the entire surface of all the wires in each stage just before the drawing die of each stage. Therefore, the anticorrosive agent can be applied to the entire surface of the central strand and each strand, and therefore the contact area between the strands can be coated with anticorrosion agent, unlike the conventional method where anticorrosion treatment is applied after forming the strand into a stranded wire. Since the anticorrosive agent does not penetrate, interstitial corrosion does not occur. Furthermore, since the anticorrosive agent is applied to each strand immediately before twisting the strands together, there is no possibility that the anticorrosive agent layer will be destroyed during the processing process, unlike in conventional single wire processing. Furthermore, since the anticorrosive agent is applied to the entire surface of the stranded wire immediately after the drawing die in the final stage, the anticorrosion treatment becomes even more complete. That is, in the present invention, during the manufacturing process of metal stranded wire, first, an anticorrosive agent is applied to the entire surface of the central strand,
Next, when each layer is twisted, the anticorrosive agent is applied to the entire surface of each strand by dropping or spraying it on each strand at a point when the strands do not touch each other,
Further, when the twisting of all stages is completed, an anticorrosive agent is applied to the entire surface of the stranded wire, and as described above, a stranded metal wire having extremely high anticorrosion performance can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic longitudinal side view of an apparatus suitable for carrying out the invention. 1... Center strand, 3... Cage for inner layer stranded wire, 7... Cage for outer layer stranded wire, 14,1
5, 16... Corrosion prevention treatment equipment.

Claims (1)

[Claims] 1. When forming a metal stranded wire consisting of multiple layers by twisting multiple strands around a central strand in multiple stages using multiple sets of stranded wire cages and drawing dies, immediately before the first stage stranded wire cage. Apply anti-corrosion agent to the entire surface of the center strand at the step, apply anti-corrosion agent to the entire surface of all the strands in each stage immediately before the drawing die of each stage, and then apply the anti-corrosion agent to the entire surface of the strands of wire in each stage immediately before the drawing die of the final stage. A method for anticorrosion treatment of stranded metal wire, characterized by applying an anticorrosion agent to the entire surface of the wire.