JP2530707B2 - Method for manufacturing composite wire of synthetic resin and metal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention comprises a plurality of thin metal wires that are twisted together to form a stranded wire, and the stranded wire is coated with a synthetic resin. The present invention relates to a method for manufacturing a composite wire of resin and metal. The present invention is suitable for a composite wire used for fishing lines, and will be described below as an example.

[Conventional technology]

BACKGROUND ART Conventionally, a synthetic resin wire made of polyamide, polyester, polyvinylidene fluoride resin, or the like, or a metal wire made of piano steel wire, stainless steel wire, tungsten steel wire, or the like has been used as a fishing line for fishing. In such a fishing line, different characteristics are required depending on the type of fish to be caught and the fishing method, so the above materials are selected according to the required characteristics. For example, in the case of companion fishing for sweetfish, because the fishing method is to pull out at the same time as mating in a fast-flowing river, one with low draining resistance, good sensitivity to hits, and high tensile strength against impact force should be used. Required. Therefore, a twisted metal wire formed by twisting a plurality of thin metal wires having a tensile strength higher than that of a synthetic resin wire is used as a fishing line for ayu fishing. Further, since the metal twisted wire alone causes problems such as rust due to deterioration in water and is inferior in knot strength when, for example, threads are tied together, the above twisted wire coated with a synthetic resin is used.

In the case of producing such a fishing line, conventionally, for example, a metal thin wire having a wire diameter of 100 μm or less is formed by cold wire drawing, and for example, seven strands are twisted into a stranded wire, and then the stranded wire is made of a synthetic resin ( A method of coating with polyester, polyamide, etc. is adopted. The resin coating method is a dip coating method in which an emulsion solution of a synthetic resin or an organic solvent dissolving bath is used, or an electric wire coating in which a synthetic resin is melted by heat and applied to a stranded wire while passing through a die. The method has been adopted.

[Problems to be solved by the invention]

However, the conventional fishing line manufacturing method described above has the following problems.

The metal twisted wire produced by the above-mentioned conventional method is inferior in stability of the twisted structure, and for example, depending on the magnitude of the tensile load, the twist is returned to cause plastic deformation. When such an unstable twisted structure is used as the fishing line, the fishing line is generally subjected to repeated impact forces, and therefore the twisting tends to return each time and the line tends to stretch, resulting in curling. This curling means that a wavy curl is generated in the length direction of the fishing line. If this curling is large, the tensile strength will decrease, so it is important to minimize this curl in order to improve the life of the fishing line. Becomes As a means for improving the stability of the twisted structure and for preventing curling, synthetic resin coating has been conventionally used, but the curling reduction effect cannot be obtained so much.

The present invention has been made in view of the above-mentioned conventional circumstances, the twist return that occurs during twisting, the residual strain is removed to stabilize the twist structure, and it is possible to prevent elongation against impact force,
Consequently, it is an object of the present invention to provide a method for producing a stranded metal wire which can reduce the occurrence of curling.

[Means for solving problems]

Therefore, the present invention is to form a stranded wire by twisting a plurality of metal ultrafine wires having a tensile strength of 300 kg / mm ² or more with an electric Ni plating coating formed thereon, and then forming a stranded wire in the stranded wire at 300 to 500 ° C. in an unoxidized atmosphere. It is characterized in that it is subjected to a stabilizer treatment in which it is held for a predetermined time, and is further coated with a synthetic resin film to form a perfect circular composite wire.

Here, a piano wire, a stainless wire, a tungsten wire, an amorphous wire, or the like can be adopted as the thin metal wire of the present invention.

Further, as the corrosion resistant metal, a metal having general corrosion resistance such as Ni, Cu, Zn, Al, Cr and Ti or a noble metal such as Ag and Au can be adopted. As these coating methods, commonly used means such as wet plating methods such as electroplating and hot dipping, and dry plating such as sputtering can be adopted.

[Operation] According to the method for producing a twisted metal wire according to the present invention, the metal thin wire is twisted and then subjected to the stabilizing treatment. Therefore, residual stress and processing strain generated by twisting the metal thin wire are removed. The stability of the twisted structure can be improved. Further, since the metal ultrafine wire is coated with the Ni plating film, the adhesion of the resin film to the stranded wire is improved, and thus the stranded structure can be stabilized. Since the stabilizer treatment is performed in the non-oxidizing atmosphere, the Ni plating film can be prevented from being oxidized, and the adhesiveness of the resin film can be improved also from this point. Therefore, when a tensile load is applied to the metal stranded wire, the amount of elongation due to the return of the stranded wire can be reduced. Therefore, when adopted as fishing line, the occurrence of curling due to impact force can be reduced, and the life can be improved accordingly.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 are views for explaining a method for manufacturing a metal strand according to an embodiment of the present invention. In the present invention, a case of manufacturing a fishing line will be described as an example.

First, a process of manufacturing the thin metal wire used in this embodiment will be described.

This thin metal wire is made by subjecting a steel wire rod to strong working by cold drawing, and ultrafine cells of 5 to 100 Å generated by the strong working are arranged in a fiber in one direction, and the fiber interval is 50 to 1000.
Å A low carbon dual phase steel wire with a fiber diameter of 100 μm or less and a tensile strength of 300 to 600 kgf / mm ² , which contains fine fibrous metal.
This low-carbon two-phase structure is a completely new metallic structure which has been unknown by the applicant of the present invention.

When manufacturing such thin metal wires, first,
C: 0.01-0.5%, Si: 3.0% or less, Mn: 5.0% or less, balance Fe
And 700 wire rods consisting of inevitable impurities with a diameter of 3.5 mm or less.
After heating to a temperature in the range of ~ 1100 ° C, cooling (this heating and cooling may be performed multiple times), and from martensite, bainite or a mixed structure thereof, which may partially contain retained austenite A wire rod having a composite structure in which the low-temperature transformation forming phase is uniformly dispersed in the ferrite phase in a volume ratio of 15 to 75% is manufactured. In addition,
Such a manufacturing method is described in JP-A-62-20824.

Next, the composite structure wire thus obtained is subjected to a strong working to a working strain of 4 or more, preferably 5 or more by cold wire drawing, and the ferrite phase and the low temperature transformation forming phase are compounded to obtain a metal structure. As a result, a fine fibrous structure extending continuously in one direction is formed. By increasing the degree of processing in this way, the fibrous structure is further miniaturized and the fiber spacing is narrowed, and finally the cell size and fiber spacing produced by processing as described above are 5 to 100Å, 50 to It has a fine fibrous microstructure of 1000Å. As a result, the wire diameter is 100 μm
The following thin metal wires are obtained (step S1).

Next, the thin metal wire is electroplated with Ni (step S2) and wound on each bobbin 6 as shown in FIG. Then, the seven thin metal wires 5 are twisted by the pulley 7 (step S3) to form the twisted wire 3. As shown in FIGS. 3 and 4, the twist pitch P of the twisted wire 3 is preferably 13 to 20 times the circumscribed circle diameter D of the twisted wire 3.

Next, the stranded wire 3 is subjected to a stabilizing process (step S4). In this stabilizing process, the inside of the processing furnace 9 is kept in an unoxidized atmosphere and heated and maintained at an appropriate temperature of 300 to 500 ° C., and the stranded wire 3 is kept in the processing furnace 9 for about 10 hours.
It is done by letting it pass in seconds. The atmosphere gas may be Ar, N ₂ , CO, or the like, and may be vacuum. In short, the Ni plating should not be oxidized. This removes the residual stress and strain generated by the twisting process.

Then, the stranded wire 3 is dipped and passed through the low viscosity resin bath 10 (step S5). In this low viscosity bathtub 10,
The low viscosity resin solution 10a is filled. This resin solution 10a
Is made by adding polyester powder, a dispersant as a coagulation inhibitor, and a surfactant to water. To reduce the viscosity, the addition amount of the polyester powder is reduced and the temperature of the solution is increased (for example, It is configured by setting about 50 ℃). Therefore, the twisted wire 3 that has passed through the low viscosity bath 10
The resin penetrates to the inside, and a thin film of about 1 μm is formed on the surface. Next, a drying oven at 200-250 ℃
Drying and baking are performed in 11 (step S6).

Next, the stranded wire 8 coated with the low viscosity resin is immersed in the high viscosity resin bath 12 (step S7). The high-viscosity bath 12 is filled with a high-viscosity resin solution 12a in which the addition amount is larger than that of the polyester powder in the low-viscosity bath 10 and the temperature is set low, for example, about room temperature.
As a result, a resin having a predetermined thickness t (shown in FIG. 3) adheres to the stranded wire 8 that has passed through the high viscosity bath 12, and the resin thickness t is made uniform by the squeeze roll 13. The resin thickness t is preferably 4 μm or more. Then, in a drying oven 14 at 200 ~ 250 ℃,
It is baked (step S8), and then wound on bobbin 15. As a result, the fishing line 1 of this embodiment is manufactured (step S9).

As described above, the fishing line 1 of this embodiment has seven steel wires 3a coated with the Ni plating 2 as shown in FIGS. 3 and 4.
.About.3 g of the central steel wire 3a is straightened and the outer steel wires 3b to 3g are spirally twisted together to form a stranded wire 3, and the stranded wire 3 is covered with a synthetic resin 4. Further, the twist pitch P is 13 to 20 times the twisted wire diameter D, and the resin thickness t is 4 μm.
Has become.

 Next, the function and effect of this embodiment will be described.

According to the method for manufacturing the fishing line 1 of the present embodiment, since the stabilizer processing is performed after the twisting process, residual stress and residual strain can be removed, and the stability of the twist structure can be improved. As a result, compared to the case where the twist structure is stabilized by solidifying with a conventional synthetic resin, the elongation amount due to the return of the twist when an impact load is applied to the fishing line 1 can be reduced, the occurrence of curling can be reduced, and the life can be shortened accordingly. Can be extended.

After immersing the twisted wire 3 in the low viscosity resin solution 10a,
Since it is immersed in the high-viscosity resin solution 12a, both the adhesion between the twisted wire and the resin and the roundness can be improved at the same time, and the draining resistance can be reduced.

That is, by the low-viscosity resin coating treatment, the resin penetrates into the inside of the twisted wire and a thin resin film is formed on the surface of the twisted wire, whereby the adhesion can be improved.
Then, a resin film having a predetermined thickness is formed on the resin film by a high-viscosity resin coating process, whereby the roundness can be secured. Therefore, in the fishing line, the draining resistance can be reduced and the generation of sound in water can be prevented.

By the way, in the conventional synthetic resin coating method, for example, dip coating, if the resin viscosity is low, the resin adhesion is good but the roundness is difficult to obtain, and the fishing line has a large draining resistance in water. On the other hand, if the viscosity of the resin solvent is increased, it becomes easier to obtain the roundness, but on the contrary, there is a limit to increase the viscosity because the adhesiveness is lowered. further,
In the case of the method of applying the resin liquid, the roundness is easily obtained, but the adhesiveness of the resin is poor, the resin is easily peeled off, and a sound is easily generated in water.

Further, in the present example, as fine metal wires, processing cells of 5 to 100 Å are arranged in a fiber shape, and the fiber spacing is 50 to 10
Since a low-carbon dual-phase steel with a wire diameter of 100 μm or less and a tensile strength of 300 to 600 kgf / mm ² that forms ultra-fine metal fibers of 00 Å is adopted, it is possible to achieve ultra-thinning compared to conventional piano wire, stainless wire, etc. At the same time, higher strength can be realized. Further, by setting the stranded wire pitch P to 13 to 20 times the wire diameter D and setting the resin thickness t to 4 μm or more, curling characteristics and knot strength as fishing line can be further improved.

In the above embodiments, the case where the present invention is applied to fishing line has been described as an example, but the metal twisted wire of the present invention is not limited to this. For example, reinforcing materials for automobile tires, mini ropes for measuring machines, copying machines, printers, etc.,
Further, it can be applied to a steel wire or the like used when holding the lens on the spectacle frame, and in these cases, the same effect as that of the above embodiment can be obtained.

Further, in the above embodiment, the case where low carbon dual phase steel is adopted as the thin metal wire is taken as an example, but the present invention can be applied to piano wire, stainless wire, tungsten wire or amorphous wire.

FIG. 5 is a characteristic diagram for explaining the results of an experiment conducted to confirm the effect of this embodiment.

In this experiment, a twisted wire having a wire diameter of 75 μ was coated with a synthetic resin having a thickness of 6 μm to prepare a metal twisted wire, and a tensile force was applied to the twisted wire to measure the elastic characteristics of the twisted wire by the manufacturing method of this example. Examined. For comparison, a conventional stranded metal wire which has not been subjected to a stabilizer treatment is also adopted and an experiment is conducted under the same conditions. In the figure, A is the characteristic of the metal strand of this embodiment, and B is
Indicates the characteristics of a metal strand that has not been subjected to the conventional stabilization treatment.

As is clear from the figure, both A and B broke at about 1.25 kgf, but the conventional metal stranded wire B started plastic deformation at about 0.6 kgf (48% of breaking load) and the stranded wire expanded. It can no longer be restored. On the other hand, it can be seen that the metal twisted wire A of the present example begins to undergo plastic deformation at about 1.0 kgf (80% of the breaking load), and the elastic properties are significantly improved.

By the way, in the case of strands before twisting, 85% of breaking load
Since the plastic deformation has started from the vicinity and the stranded wire of the present example has substantially the same elastic characteristics as this strand, it is considered that the twist back hardly occurs. On the other hand, in the conventional twisted wire, it is considered that the twisting back occurs at 0.6 to 1.0 kgf, and thus curling is likely to occur.

〔The invention's effect〕

As described above, according to the twisted metal wire of the present invention, after forming a twisted wire by twisting a plurality of fine metal wires, 300 to 5
Stabilizing treatment is performed for a predetermined time in a non-oxidizing atmosphere at 00 ° C, and a synthetic resin film is formed to cover it.
This has the effect of improving the stability of the twisted structure of the metal twisted wire, and by extension, the elastic properties.

[Brief description of drawings]

1 to 4 are views for explaining a case where the method for manufacturing a metal strand according to one embodiment of the present invention is applied to fishing line, and FIG. 1 is a process diagram showing the manufacturing process, and FIG. FIG. 4 is a schematic configuration diagram thereof, FIG. 3 is a sectional view of the manufactured fishing line, FIG. 4 is a schematic side view thereof, and FIG. 5 is a characteristic diagram showing experimental results of this embodiment. In the figure, 1 is a fishing line (metal twisted wire), 2 is Ni plating (corrosion resistant metal plating), 3a to 3g, 5 are fine metal wires, 3 and 8 are twisted wires, and 9 is a stabilization treatment furnace.

Continuation of the front page (56) Reference JP 62-257331 (JP, A) JP 60-154829 (JP, A) Actual opening 63-116074 (JP, U) Actual opening 62-122570 (JP , U)

Claims (1)

(57) [Claims] 1. A stranded wire is formed by twisting a plurality of metal ultrafine wires coated with an electric Ni plating film and having a tensile strength of 300 kg / mm ² or more to form a stranded wire, and the stranded wire is kept at 300 to 500 ° C. Stabilize for holding for a predetermined time in an oxidizing atmosphere,
A method for producing a composite wire of synthetic resin and metal excellent in curling resistance, which comprises forming a synthetic resin film to form a perfect circular composite wire.