KR860001324B1 - Manufacturing method of straight angle insulation wire - Google Patents

Abstract

A flat type insulated wire(2') is made by rolling a round shape insulated wire(2), applying a solvent which swells the insulating coating of the insulated wire and subjecting the insulated wire to an annealing treatment. Prior to the application of the solvent to the insulating coating, the rolled flat insulated wire is subjected to annealing treatment to remove the residual stress produced by the rolling treatment. The insulating coating consists of polyamideimide or polyester.

Description

Method of manufacturing flat insulated wire

1 is an explanatory diagram of a method of manufacturing a flat insulated wire according to the present invention.

2 is a cross-sectional view of a cross-sectional annular insulated wire before rolling in the manufacturing method according to the present invention.

3 is a cross-sectional view of a flat insulated wire after rolling in the manufacturing method according to the present invention.

4 is a cross-sectional view of a flat insulated wire manufactured by the manufacturing method according to the present invention.

The present invention relates to a method of manufacturing a flat insulated wire. More specifically, the present invention relates to a method for producing a flat insulated wire by rolling an insulated wire coated with a coating on a conductor. The flat insulated cable has the advantage that the device can be miniaturized because the wire occupancy in a certain space is good compared to the insulated wire.

However, if the edge film is thin, the breakdown voltage is lowered and the reliability of the coil is lowered, which in turn shortens the life of the device and lowers the reliability of the whole device.

Conventional flat insulated wires have been produced by coating paint on the flat conductor once or several times, but it is difficult to obtain a flat film having an even film thickness at the edge of the flat body diagram by this manufacturing method.

For example, even if the paint can be applied to the edge, the fluidity increases with the temperature of the paint at the time of baking, and only a thin coating film is attached to the edge of the baking. For this reason, there have been various difficulties in the method of taking the curvature of the edge portion of the flat conductor, the properties of the paint, or the method of baking.

However, flat insulated wires, especially thin three flat insulated wires, or very thin flat insulated wires, which are used as coils for acoustic equipment, for example, are thin thin insulated wires and the edges of these slightly thicker flat conductors are equal to the plane. It is almost impossible to cover with a uniform coating.

It is a main object of the present invention to solve these problems. That is, the manufacturing method of the flat insulated wire which concerns on this invention is characterized by rolling and heat-processing the insulated wire which apply | coated and apply | coated the paint to the conductor, and apply | coating and baking a paint further. In addition, the method according to the present invention is characterized by rolling the insulated wire into a plurality of times to make a flat, then heat-treated and then coating the coating.

In addition, the method of the present invention is a method of manufacturing a flat insulated wire by rolling a heat insulated wire and heat-treating the coating, and then obtaining a ratio of a predetermined thickness and width by a plurality of rollings. At least one heat treatment of the insulated wire rolled between the last rolling.

Another object of the present invention is to provide a method for producing a flat insulated wire having a very high degree of accuracy.

In other words, the manufacturing method according to the present invention is a method of manufacturing a flat insulated wire by rolling the insulated wire to a flat angle and then heat-treating the coating and then coating the coating, wherein the reverse tensile load is applied to give 0.2% -5% elongation at the time of rolling. It is characterized by giving.

Furthermore, the method according to the invention presses the insulated wire which is baked and coated with a conductor. In the method for producing a flat insulated wire, the method is characterized by rolling in a heated state, post-heat treatment, and application of a post-figure diagram.

Hereinafter, the present invention will be described in more detail.

In the present invention, the thin or very thin flat insulated wire as described above is made by rolling the insulated wire so that the thickness of the coating film at the edge portion is made to be a little flat, and the coating portion is coated.

Rolling the insulated wire causes the work hardening of the conductor to elongate and change the tensile strength.

That is, since it hardens to the extent that a coil cannot be processed as it is, the process of softening the flat insulated wire after rolling is needed. That is, as the rolling force increases the tensile strength to 30-35kg / mm 2 and the stretching decreases to about 1-5%, it is necessary to heat the conductor to soften.

Regarding softening after rolling, as the insulated wire coated with an insulated wire having low heat resistance, the coating may cause heat shock and cracks may occur when the conductor is softened. In addition, the electrical properties of the insulating coating are often extremely reduced with rolling. For example, when the ratio of thickness and width after rolling exceeds 1: 5, the breakdown voltage falls to about 5-6% 1: of the breakdown voltage value of the insulated wire before rolling.

In the present invention, after the heat treatment of the insulated wire after rolling, coating and coating are applied in order to recover electrical characteristics degraded by rolling.

As described above, the coating is applied to the flat insulating film after rolling as many times as necessary, but in this case, the coating of the flat insulating wire is sufficiently subjected to micro-brown movement with heating and the temperature and time for recovering the processing deterioration caused by rolling are applied. It is preferable to give, and in such a case, it is possible to recover the deterioration due to processing and to obtain a reliable flat insulated wire, in particular, in such a case.

In addition, the main purpose of coating and baking the coating after the above-mentioned rolling is to cover the deterioration of the coating by processing and to improve the coating characteristics.

In addition, it is possible to improve the heat resistance when coating the flat insulated wire and coating other coating, and to improve the mechanical strength or the chemical resistance and solvent resistance. You can get a sex flat insulated wire. Another purpose of applying such paints after rolling is thermal deterioration of an insulating film having low heat resistance, for example, when the polyvinyl formal wire is rolled and heat treated, no cracking occurs in the coating, but the coating is subjected to thermal curing. Flexibility may fall.

By using the method according to the invention it is possible to prevent such deterioration.

The method for producing a flat insulated wire according to the present invention can be applied to almost all insulated wires regardless of heat resistance, high or high shock resistance.

The insulated wire may be a polyester wire, a polyvinyl formal wire, a polyurethane wire, a polyester imide wire, a polyamide amide wire, a polyimide wire, a polyhydrin phosphorus wire, or an insulated wire of a multi-structure coating in which these insulating films are combined.

Moreover, as a coating material apply | coated after rolling, various coating materials, such as polyester, polyvinyl formal, polyurelan, polyesterimide, polyamideimide, polyimide, and polyhydrane, can be used.

In addition, since the self-fusion function is brought to the flat insulated wire, various self-sealing paints such as epoxy, polypinylbutyltal, polysulfone, and polysulfone ether can be used.

Here, the number of coating spots of the paint can be changed according to the final target properties (elongation, tensile strength, breakdown voltage, pinhole, etc.) of the flat wire. In other words, the coating may be applied to a place where the stranded wire has a tensile strength suitable for coil processing and the processing deterioration of the film received by rolling is recovered.

In the present invention, in the method of coating and baking the coating after rolling and heat-treating the insulated wire, a ratio of thickness and width of at least 1: 5 can be finally obtained by rolling in a plurality of times. It is possible to produce an insulated wire which is good in appearance without cracking or peeling. In order to obtain a predetermined thickness and width ratio in one roll, the film cannot be subjected to the deformation rate of the conductor and the film is likely to be cut during rolling. For example, even if it can be rolled without cutting | disconnecting, it will generate a heat shock at the time of heat processing of a next process, and will produce a film crack.

It is considered that when one or more rolls are rolled in a single rolling, the strain rate varies depending on the rolling place, the strain rate is large, and as a result, the place where the deformation amount is large is hit by the shock and cracks are formed in the film.

In the multiple times of rolling, the film is rolled so that the unevenness in the magnitude of the deformation amount due to each place is small compared with the one time rolling in accordance with the one conductor deformation speed.

It is considered that the coating did not enter cracks due to heat shock, as well as during heat treatment. In addition, in the rolling of the metal, a plurality of rollings are performed, but in this case, a plurality of rollings are used in order to obtain a metal shape with good dimensional accuracy by repeating the rolling sequentially or when rolling a very wary metal material. The object is completely different from the invention.

By the way, the number of times of rolling can be changed depending on the insulating film used. In order to obtain a 1:10 flat insulated wire with a thickness-to-width ratio, it is recommended that the film with poor adhesion with the conductor be rolled 3-5 times, and the film with good adhesion with the conductor should be rolled twice. For example, a polyesterimide wire or a polyimide wire with poor adhesion should have three or more times of rolling, whereas a polyinyl formal line or a polyamide imide wire should have two times of rolling.

The other factor that determines the number of rolls is the conductor diameter. Therefore, it is better to change the number of times of rolling even by the conductor diameter. In other words, the larger the diameter is, the better the rolling count is. In an insulated wire having a conductor diameter of 1.0 mm or more, it is recommended to roll it three times or more if the ratio of thickness and width is 1: 5 or more, or two times or less than 1.0 mm. However, since there is a relationship with the film described above, it is desirable to determine the number of rollings in consideration of the properties of the film and the conductor diameter.

In addition, according to the present invention, it is possible to manufacture high quality flat wire having a ratio of thickness to width of about 1:10.

In addition, as a conductor, aluminum is more flexible than copper, even if the conductor diameter is 1.0 mm or more, sometimes it is sufficient by two rolling and one heat treatment.

In addition, the present invention provides a method for producing a flat insulated wire having a large thickness and width ratio as a heat treatment step is placed in the middle of the rolling step in the method for obtaining a flat insulated wire by a plurality of times of rolling described above.

The purpose of providing this heat treatment step is to soften the work-hardened conductors by rolling and to relieve the residual stress of the film accumulated by the work, but the heat treatment temperature can be changed depending on the main purpose.

In other words, in the case where the main purpose of softening of the conductor is to make the heat treatment temperature 200 ° C. or more, the temperature of 100 ° C. to 200 ° C. may be sufficient in order to mainly reduce the residual stress of the insulating film. If the heat treatment process is placed in the middle of the first and last rolling processes in the multiple rolling, the conductors are softened, so that the next rolling can be carried out at a lower pressure, and the processing deterioration to the coating is reduced.

In addition, the residual stress of the film received by rolling has the advantage that the film is greatly relaxed because the film causes molecular motion due to the heat treatment.

By the way, the number of times of rolling and the heat treatment are changed depending on the conductors used, in particular, hardness (hardness) and insulating coating. For example, when a flat insulated wire having a ratio of thickness to width of about 1:15 is obtained, it is better to complete the film after 3-5 rolling for poor adhesion with conductors, and the number of times of heat treatment should be 2-4 times. In the case of a film having good adhesion with the conductor, it is sufficient to complete it by two rollings, so that the heat treatment is also performed once.

According to the present invention as described above, it is possible to manufacture a flat insulated wire having a ratio of thickness and width up to about 15: 15 to obtain a high quality flat insulated wire compared with the conventional one. In addition, although the present invention has been described for the production of flat insulated wires having a ratio of thickness to width of 1: 5 or more, the present invention is not limited to this but may be less than 1: 5.

In addition, in the present invention, in the method of coating and baking the coating after the insulated wire is rolled and annealed, a flat insulated wire having good dimensional accuracy is produced by rolling the insulated wire in a state of 0.2% -5%. can do.

In addition, when a metal plate or a rod is rolled in the related art, a reverse tensile load is applied during rolling to prevent distortion or to obtain a uniform thickness and width. In this case, it would have been good to roll in consideration of the properties of the metal body only.

In the present invention, for example, when the insulated wire having a conductor diameter of 0.30 mm is rolled to obtain a conductor dimension thickness x width = 0.10 mm x 0.40 mm, such reverse tensile load gives an elongation of less than 0.2% as in the case of metal only. In the case of insulated wire which is easy to be distorted at the time of rolling and coated with a film thickness of 0.020 mm at the conductor size as the reverse tensile load giving elongation of more than 5%, the finished dimension after rolling heat treatment is about ± 0.005 mm in thickness, Only the thing of width 0.06mm was obtained.

However, when the above-mentioned insulated wire was subjected to rolling with a reverse tensile load giving 0.2% -5% elongation and then heat-treated, the finished dimension was obtained with the thickness of ± 0.003mm and the width of ± 0.03mm, regardless of the metal only. .

As described above, it was found that a good dimensional accuracy is obtained when a reverse tensile load that brings about an extension of an insulated wire is applied.

The reason is also due to the following description.

In the case of the peristaltic wire, the elongation in the elastic crab is about 0.2%, and the elastic crab strength at that time is 8-10 kg / mm 2, while the elastic limit stretching of the insulating film is about 5%, and the elastic crab strength at that time is 4-6 kg / mm 2. In the case of rolling only the interlocking line, if the reverse tension load is applied to prevent slack, the same degree of extension of the conductor as the elastic range or the plastic range is obtained. On the other hand, in the case of the insulating coating, even within 5% of the elastic region, the film is uniformly deformed even when rolling, but when the stretching is over 5%, the coating is rolled after plastic deformation.

However, plastic deformation of the film tends to make the tissue constituting the film non-uniform, and molecular chains are drawn and undrawn. When rolling in such a state, even if a rolling roll etc. improves, the grade will fall very much. In addition, in the case of heat treatment even after rolling as in the present invention, the degree of heterogeneity is considered to be more remarkable depending on the degree of heat treatment.

In the case of an insulated wire coated with a coating on the conductor, the adhesion between the conductor and the skin is firm, and the film seems to be uniformly stretched according to the conductor, but when the film is stretched to undergo plastic deformation, the thickness of the film is uneven. In addition, when rolling in such a state, not only the distribution of stress is uneven in a part of the coating but also the unevenness of the coating affects the conductor and it is considered that only a flat insulated wire having poor dimensional accuracy can be obtained.

When the stretching of the coating gives the same tension as in the elastic band, the stress distribution in the coating is uniform, so that a flat insulated wire having a very good dimensional accuracy after rolling and heat treatment is obtained.

In addition, the present invention provides a method of preventing work deterioration due to the rolling of the film by rolling the insulated wire and rolling the insulated wire in a heated state at the time of rolling in the method of coating and coating the coating water after the heat treatment.

In case of heating the insulated wire at the time of stretching, it is better to heat the glass transition temperature above the insulating film, and the most effective was when it was heated to the temperature showing rubber elasticity 20-40 ℃ higher than the glass transition temperature and rolled at that temperature. All.

At this time, the deterioration of the film was the least.

The glass transition temperature of an insulating film changes with kinds, and in general, it exists in the tendency which becomes so high that it is a thing with good heat resistance. For example, depending on the type of insulating material, it is changed as shown below.

Polyvinyl formal: 110 degreeC, polyester: 130 degreeC, polyurethane: 140 degreeC, polyester imide: 190 degreeC, polyhydrinin: 240 degreeC, polyamideimide: 280 degreeC, polyimide: 350 degreeC.

In all cases, good results are obtained by heating the glass transition temperature or higher.

Here we found another advantage over heating.

In other words, when the recrystallization temperature of a conductor, for example, copper and aluminum, was used as a conductor and rolled in a state heated at a recrystallization temperature of 200 ° C. or higher, for example, even when the insulating film displayed a glass state at that temperature, the characteristic degradation was very small.

This is because the conductor is known to be above the recrystallization temperature and the rolling resistance decreases, so that there is little deterioration in the film properties.

For example, when polyester imide and polyhydrant are copper or aluminum as conductors, they have a glass transition temperature close to the recrystallization temperature of the conductor. Thus, the film shows rubber elasticity when heated to 230 ° -240 ° C. Flexible, the conductors are softened to get the best results.

When rolling the polyvinyl formal wire which has a glass transition temperature lower than the recrystallization temperature of a conductor, it is best to roll to the temperature of 160 degreeC. At this time, the conductor is lower than the recrystallization temperature, but it is considered that the polyvinyl formal follows the conductor deformation at this temperature.

As another example, in the case of the polyamide imide wire, the results may be rolled at a temperature near 250 ° C. lower than the glass transition temperature of the polyamideimide.

In the case of polyamide, the coating was in a glass state at a temperature of 250 ° C., but the conductor was easily deformed beyond the recrystallization temperature, so that the coating was not deteriorated during rolling. As a method of heating an insulated wire, a high frequency induction heating furnace, an electric furnace, a gas furnace, etc. are good, and a roller may be heated in some cases.

By rolling the insulated wire, which is a composite material coated with a polymer film such as an insulated film on the metal, by applying such physical properties of the metal and the film, it is possible to press down the work deterioration of the film and obtain a flat insulated wire having good characteristics. .

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

In the present invention, as shown in FIG. 1, an insulated wire 2 coated with an insulating coating on a conductor is sequentially sent out by a supply rail 1, rolled by a rolling roller 3, and a flat insulated wire 2 '. Then, the coating is applied using the coating device 5 and baked using the baking furnace 4. When repeating application of the paint, it is possible to use the guide rollers 7, 8, 9, 10.

In the present invention, the flat insulated wire can be heat treated using the baking furnace 4 before coating and baking the coating.

The present invention can also heat-treat a flat insulated wire by using a baking furnace 4 after coating and coating the paint.

In addition, the manufacturing method of the present invention may include the step of rolling the insulated wire 2 with the rolling roller 3 and then rolling with the rolling roller 11. The method may further include a step of rolling with the rolling roller 3, followed by heat treatment using the heat treatment furnace 12, and then rolling with the rolling roller 11.

In addition, in the manufacturing method of the present invention, when the insulated wire 2 is rolled, the inverse saddle load can be applied to the insulated wire by the reverse tension load devices 13 and 14.

In addition, before rolling the insulated wire 2, it can pass through the heating apparatus 15 which heats an insulated wire, and can be rolled in the state which heats the insulated wire.

In the present embodiment, all the processes, that is, the rolling process, the heat treatment process, the coating and baking process of the paint, and the process of loading the reverse tensile load are all shown in series, but are not necessarily in series, and the respective processes are separated. You may carry out as a separate process. Especially in the case of plural rolling, in the case of heat treatment in the middle, for example, in the case of three or more rolling, it is not necessary to put the heat treatment process after the first rolling process. What is necessary is just to put a heat processing process between processes.

In Fig. 2, reference numeral 16 denotes a conductor and reference numeral 17 denotes an insulating coating. In Figure 3 and 4, reference numerals 16 'and 17' denote a conductor and an insulating coating after rolling, respectively. . In FIG. 4, (18) has shown the film obtained by apply | coating baking of paint after carrying out the heat treatment of the insulated wire.

The present invention provides a method for producing a high-quality flat insulated wire by rolling an insulated wire and then heat-treating the coating material. A combination of the above-described combinations, that is, the coating part of a plurality of rollings and paints, the step of putting an intermediate heat treatment in a plurality of rollings, the coating part of a paint, the process of loading a reverse tensile load during rolling, the coating part of a paint, hot rolling, It is not limited to the combination of coating parts of the paint, for example, three combinations, plural times, the load of the rolling and reverse tensile load and the coating part of the paint, the hot rolling and multiple rolling and the coating part of the paint, the reverse tensile load Also in load, hot rolling and coating part of paint, etc., it is effective, and in some cases, four combinations, reverse tensile load and multiple times of rolling and coating application part including heat treatment process in the middle, load and hot load in reverse tensioner It is also applied to rolling, plural rolling and coating parts of paints. It is also applicable to five more combinations, plural rolling loads including reverse tensile load and hot rolling and intermediate heat treatment. It can be applied to fabric baking.

As the insulated wire used in the present invention, a general insulated wire, i.e., coated and baked a copper, aluminum conductor or other metal, that is, polyvinyl formal, polyester, polyesterimide, polyamideimide, polyimide, etc. Insulated wire coated with insulating paint or multi-structured insulated wire combined with coating parts of these insulating paints, and self-bonding insulated wire coated with self-adhesive paint on the insulated wire, or fired between the insulating film and the conductor An insulated wire having a coating formed by coating and applying a paint in which a linear polymer easily deformed in a solvent, or an insulated wire having an adhesive coating between the insulating coating and the conductor to facilitate adhesion between the conductor and the insulating coating; Insulated wire having a linear polymer film on the insulating film is used. As the self-adhesive paint, epoxy-based paints, phenol-modified epoxy paints, polysulfone paints, polysulfone ether paints, polyvinyl butyral paints and the like can be used according to the purpose. , Polysulfone, polysulfone ether, polyester, polyethylene, polypropylene, phenoxy resin, polyvinyl formal, polyvinyl butyral, polymethyl methacrylate, polyacrylonitrile and the like. As the adhesive, an epoxy adhesive, an epoxy polyamide adhesive, an epoxy polyamine adhesive, an epoxy polysulfide adhesive, an epoxy phenol adhesive, or the like is used. In addition, the insulated wire used for this invention is not limited to what is manufactured using the said insulating paint, self-adhesive paint, linear polymeric adhesive agent, or a combination thereof.

Hereinafter, the present invention will be described by way of examples.

[Comparative Example (1)]

A polyamide-imide insulated wire (film thickness 0.024 mm) having a conductor diameter of 0.55 mm was rolled at a wire speed of 30 / min to obtain a flat insulated wire having a finished thickness x width = 0.25 mm x 1.028 mm. In order to soften the conductor of this flat wire, it is made to pass through a firing furnace (furnace length 2.5m, temperature 420 degreeC) twice at the speed of 30m / min. The characteristics of the flat insulated wire obtained at that time are shown in the first table.

[Comparative Example (2)]

A polyester insulated wire (film thickness 0.023 mm) having a conductor diameter of 0.05 mm was rolled at a line speed of 30 m / min to obtain a flat insulated wire having a completed thickness x width = 0.222 mm x 0.967 mm. In order to soften the conductor of this flat wire, it passed through the inside part (2 m length of furnace, temperature 420 degreeC) twice at the speed of 30 m / min. The characteristics of the flat insulated wire obtained at that time are shown in the first table.

[Comparative Example (3)]

A polyvinyl polyol insulated wire (film thickness 0.023 mm) having a conductor diameter of 0.50 mm ø was rolled at a line speed of 30 m / min to obtain a flat insulated wire having a finished thickness x width = 0.245 mm x 0.960 mm. In order to soften the conductor of this flat electric wire, it passed through the firing furnace (furnace length 2.5m, temperature 420 degreeC) twice at the speed of 40m / min. The characteristics of the flat insulated wire obtained at that time are shown in the 1st table | surface.

[Comparative Example (4)]

A polyester imide insulated wire (film thickness of 0.019 mm) having a conductor diameter of 0.26 mm ø was rolled at a line speed of 40 m / min to obtain a flat insulated wire having a completed thickness x width = 0.130 mm x 0.490 mm. In order to soften the conductor of a biangular wire, it passed through the furnace part (furnace length 2.5m, temperature 420 degreeC) twice at the speed of 40m / min. The characteristics of the flat insulated wire obtained at that time are shown in the first table.

[Comparative Example (5)]

Rolled insulation wire (film thickness 0.022mm) of a double structure film (conductor: polyester terimide, upper surface: polyamideimide) having a conductor diameter of 0.40mmø was rolled at a speed of 35m / min, and finished thickness x width = 0.193mm x 0.803mm A flat insulated wire was obtained. In order to soften the conductor of this flat electric wire, the inside of a firing furnace (furnace length 2.5m, temperature 420 degreeC) was passed twice at the speed of 40m / min. The characteristics of the flat insulated wire obtained at that time are shown in the first table.

[Example (1)]

Except as described below, all are the same as the comparative example (1) mentioned above. In the flat insulated wire obtained by rolling, after softening a conductor, the polyamide-imide coating material was apply-coated by felt. This coating part recovery was performed twice. The characteristics of the insulated wire obtained at that time are shown in the 1st table | surface.

[Example (2)]

All are the same as the comparative example (2) except having described below. In the flat insulated wire obtained by rolling, after softening a conductor, the polyamide-imide coating material was apply-coated by felt. This coating part recovery was performed twice. The characteristics of the insulated wire obtained at that time are shown in the 1st table | surface.

[Example (3)]

It is the same as that of the comparative example (3) which mentioned all except the following. In the flat insulated wire obtained by rolling, after softening a conductor, the epoxy coating of self-adhesive paint was apply | coated and baked. This coating part recovery was performed four times. The characteristics of the insulated wire obtained at that time are shown in the 1st table | surface.

[Example (4)]

All are the same as the said comparative example (4) except having described below. In the flat insulated wire obtained by rolling, after softening a conductor, the polyamide-imide paint was apply | coated and felt part by felt. This coating part recovery was performed twice. The characteristics of the insulated wire obtained at that time are shown in the 1st table | surface.

[Example (5)]

Except as described below, all are the same as the said comparative example (5). In the flat insulated wire obtained by rolling, after softening a conductor, the polyvinyl butyral paint which is a self-adhesive paint was apply | coated part. This coating part recovery was performed four times. The characteristics of the insulated wire obtained at that time are shown in the 1st table | surface.

[Example (6)]

Conductor paper is made of 0.55mm polyamide insulated wire (film thickness: 0.024mm) with a flat insulated wire having a thickness x width = 0.550mm x 1.028mm completed by the first rolling, followed by rolling a second time. A flat insulated wire having a thickness x width = 0.188 mm x 1.340 mm was obtained. Then, after heat-processing through a heat processing furnace (furnace length 1.5m, temperature 500 degreeC), the polyamide coating material was apply | coated with the felt and baked by the baking furnace (furnace length 2.5m temperature 450 degreeC). This coating part was recovered twice. Moreover, the ship speed was 30 m / min in final winding. The properties of the flat insulated wire obtained at that time are shown in the second table.

[Example (7)]

All are the same as Example (6) except having described below. After the insulated wire was obtained by rolling a single material, a flat insulated wire having a thickness × width = 0.25 mm × 1.028 mm was obtained, and then heat-treated by passing through a heat treatment furnace (furnace length of 1.5 m and a temperature of 530 ° C.), followed by the second rolling. To obtain a flat insulated wire having a finished thickness x width = 0.99 mm x 1.552 mm. Thereafter, the polyamide-imide paint was applied with felt and baked in a baking furnace (furnace length 2.5 m temperature 450 ° C.).

This coating part was collected three times. Moreover, the ship speed was 32 m / min in final winding. The properties of the flat insulated wire obtained at that time are shown in the second table.

[Example (8)]

It is the same as that of the comparative example (1) except having described below. The insulated wire used in Comparative Example (1) was rolled under a load of 11 kg / mm 2 so as to have a drawing length of 2% before rolling to obtain a flat insulated wire having a thickness × width = 0.55 mm x 1.030 mm. The epoxy paint of the adhesive coating was passed through the coating element section (furnace length 2.5 m, furnace temperature 420 ° C.) using a felt to cope with it. The number of isotopes was collected twice. The wire characteristic obtained at that time was shown to the 2nd table | surface.

[Comparative Example (6)]

All are the same as Example (8) except having described below.

The insulated wire was rolled under a load of 5 kg / mm 2 so as to have a draw ratio of 0.1% before rolling. The wire characteristics of the flat insulated wire obtained at that time are shown in the first table.

[Comparative Example (7)]

All are the same as Example (8) except having described below.

The insulated wire was rolled with a reverse tensile load of 18 kg / mm 2 so that the elongation before rolling was 6%. The wire characteristics of the flat insulated wire obtained at that time are shown in the first table.

[Example (9)]

All are the same as the comparative example (1) except having described below. Before rolling the insulated wire used in Comparative Example (1), the temperature of the rolled roll electric field of the insulated wire was changed to 250 ° C through a heat treatment furnace (furnace length 1.5m, temperature 400 ° C) and rolled to complete thickness width 0.220mm × 1.05mm After obtaining the flat insulated wire of, polyamide-imide paint was applied using a felt, followed by baking through a baking furnace (furnace length 2.5 m, furnace temperature 420 ° C.). The number of isotopes was collected twice. The wire characteristics obtained at that time are shown in the second table.

Example (10)

The polyamide-imide insulated wire having a conductor diameter of 0.40 mm (thickness of 0.022 mm) was subjected to a reverse tensile load before the rolling roll and rolled under tension so that the insulated wire was stretched 0.5%, and the thickness × width completed by the first rolling After obtaining a flat insulated wire of = 0.18mm × 0.790mm, heat treatment was performed by passing through a heat treatment furnace (furnace length 1.5m, furnace temperature 530 ° C.). Further, rolling was performed for the second time while stretching 0.3% of the flat insulated wire by the reverse tensile load to obtain a flat insulated wire having the completed thickness x width = 0.1222 mm x 1.090 mm. Then, the epoxy coating which is a self-adhesive coating was apply | coated using a felt, and it baked by passing through the baking furnace (furnace length 2.5m, furnace temperature 450 degreeC).

This coating part recovery was performed twice. The ship speed was 25 m / min by the final winding. The characteristics of the self-adhesive insulated wire obtained at that time are shown in the 2nd table | surface.

Example 11

Except as described below, all are the same as Example (10).

Before rolling an insulated wire, it passed through the heat processing furnace (furnace length 1.5m, temperature 400 degreeC), and made the temperature before the rolling roll of an insulated wire into 260 degreeC. The characteristics of the self-adhesive insulated wire obtained at that time are shown in the 2nd table | surface.

[Example (12)]

Before rolling the polyamide-imide insulated wire having a conductor diameter of 0.40 mm (thickness 0.022 mm), it is passed through a heat treatment furnace (furnace length 1.5 m, temperature of 400 ° C.) to make the temperature before rolling the insulated wire 260 ° C. After rolling, a flat insulated wire having a finished thickness x width = 0.191 mm x 0.795 mm was obtained, and then heat-treated by passing through a heat treatment furnace (furnace length 1.5 m, furnace temperature 530 占 폚). The second rolling was performed to obtain a flat insulated wire having a finished thickness x width = 0,122 mm x 1.098 mm, and then coated with felt using a phenol-modified epoxy paint, which is a self-adhesive paint, and used as a small part (25 m length). Furnace temperature 450 degreeC), and it baked. This coating part recovery was performed twice. Ship speed was 25 m / min in the final winding. The characteristics of the self-adhesive insulated wire obtained at this time are shown in the second table.

[Example (13)]

Heat-treatment furnace (length 1.5) using a polyester imide insulated wire having a conductor diameter of 1.0 mm (film thickness of 0.035 mm) and a flat insulated wire having a thickness × width = 0.51 mm x 1.55 mm completed by the first rolling. m, a temperature of 500 DEG C), and then subjected to heat treatment, followed by the second rolling to obtain a flat insulated wire having a completed thickness x width = 0.330 mm x 2.230 mm. After heat treatment by passing through a heat treatment furnace (furnace length of 1.5 m, temperature of 500 ° C.), the third rolling was performed to obtain a flat insulated wire having a completed thickness × width = 0.06 mm × 2.702 mm. Next, the polyamide-imide coating material was applied using a felt, and then the middle part was passed through at a speed of 25 m / min. This coating part recovery was performed twice. The properties of the flat insulated wire obtained at that time are shown in the second table.

[Table 1]

Flat insulated wire

Measurement of breakdown voltage: Two flat insulated wires were superimposed with + letters, loaded at 50 g, and measured at a boosting speed of 70 V / sec.

Measurement of pinhole: According to JIS C 3003.

Claims (1)

A method of manufacturing a flat insulated wire by rolling and heat-treating an insulated wire coated with an insulating paint on a conductor. Way.

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