JPH09161564A - Manufacture of self fusion aggregate wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a baking furnace and reduce facility cost and manufacturing space by bundling plural self fusion insulation element wires in parallel, passing them through dice while heating, and forcibly fusing them so as to make an integrated aggregate wire. SOLUTION: For self fusion insulation element wires 1, an insulation layer 3 is formed on a conductor 2, and a self fusion layer 4 is formed on the insulation layer 3. Plural element wires continuously supplied are bundled in parallel via a scale plate 6 and a guide die 7, and this aggregate wire 10 is guided in a heating device 8. The aggregate wire 10 is heated in the heating device and is forcibly passed to a dice 5 arranged in the heating device 8. And, a fusion layer 4 of each element wire 1 is mutually fused, and the bundled element wire 1 is wound by means of a winding machine 9 as a self fusion aggregate wire 11 integrated in its specified sectional shape. At this time, the electric wire surface temperature when the dice 5 is passed through ranges from the melting point of a resin component used for the fusion layer 4 to a temperature which is 60 deg.C higher than the temperature.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a high-detail CRT (CRT).
The present invention relates to a method for producing a self-bonding assembly line composed of a so-called straight bundled wire, which is suitable for a coil for a high-frequency device such as a winding of a deflection yoke used for an Atho Ray Tube.

[0002]

2. Description of the Related Art Conventionally, a so-called litz wire formed by twisting a plurality of self-bonding insulating wires has been generally used as a self-bonding assembly wire, but in recent years, a plurality of insulating wires are bundled in parallel. Various proposals have been made in which a self-bonding layer is formed on the outer side of the combined assembly line. These are said that when the Litz wire is wound into a complicated shape such as a deflection yoke coil, protrusion of the insulating wire due to untwisting or the like and breakage of the wire frequently occur, which lowers the yield of the coil. Since there is a problem, a self-fusion layer is further provided on the outside as a countermeasure, and the above-mentioned protrusion and disconnection are suppressed by the fusion force.

However, when a self-fusing layer is formed on the outer side of an assembly wire formed by simply bundling a plurality of insulating wires, a thermoplastic resin is applied and baked on the surface of the assembly wire a plurality of times to obtain a desired thickness. Although the self-bonding layer is used as a self-bonding layer, since the insulation wire will come apart during baking and a self-bonding assembly wire that can withstand practical use as a coil cannot be obtained. You need to do it. Conventionally, as the restraint means, a method of binding the insulating wires to each other by baking a thermosetting resin (Japanese Patent Laid-Open No. 5-250923) or a method of binding the insulating wires to each other by a central interposition of a thermoplastic resin is used. A method (Japanese Patent Laid-Open No. 3-184214) and the like have been proposed.

[0004]

However, in the restraint means using the thermosetting resin, the self-bonding assembly wire obtained by providing the self-bonding layer on the outside is self-bonding to the wire arranged in the center. Since there are no layers, the fusion force does not reach during pressing during coil forming, and the strands in the center tend to come apart, causing thermosetting resin to enter between the insulating strands and harden and solidify as a whole. In addition to the drawback that it becomes a hard wire, at least two baking furnaces are required to form the thermosetting resin layer for restraining the insulating wire group and the self-bonding layer on the outside in the manufacturing process. Also, there is a problem that the maintenance cost increases and the manufacturing space efficiency also deteriorates. On the other hand, in the restraint means by the center interposition of the thermoplastic resin, since the non-conductor center interposition occupies a large cross-sectional area in the assembly line, the resulting self-fusion assembly line has a small conductor cross-sectional area for diameter, There is a problem that the space factor of the coil is deteriorated and the performance is deteriorated.

If a plurality of insulating wires are twisted together and a thermoplastic resin is applied to the outside of the twisted assembly wire and baked to form a self-bonding layer, the self-bonding layer is baked. Although it is possible to prevent time lag, a separate twisting process is required, resulting in a very high equipment cost, and it is not possible to manufacture on one continuous running line, which is a fatal problem that the manufacturing cost rises significantly. There is.

In view of the above situation, the present invention is to manufacture a self-bonding assembly wire having a structure in which a plurality of insulating wires are bundled in parallel. Does not require a step of providing a self-bonding layer on the outer side of the wire, and therefore does not need to restrain the insulating wire group in an aggregated state prior to the formation of the self-bonding layer. In addition, since the baking furnace for forming the outer self-fusing layer is unnecessary, it is an object of the invention to provide an epoch-making method capable of significantly reducing the equipment cost and the manufacturing space.

[0007]

According to a first aspect of the present invention, there is provided a self-bonding assembly wire manufacturing method, wherein an insulating layer 3 and a self-bonding layer 4 are sequentially formed on a conductor 2. By passing a plurality of the wires 1 in a state of bundling them in parallel while passing them through a die 5, the self-bonding layers 4 of these wires 1 are forcibly fused to each other to form an integrated assembly wire 11. It is characterized by doing. Therefore, the self-bonding assembly wire 11 obtained by this method bears the self-bonding property of the entire assembly wire due to the self-bonding layer 4 of the wire 1 itself, and thus the insulation wires are bundled as in the conventional case. It is not necessary to newly provide a self-bonding layer on the outer side of the assembly wire, and since the self-bonding layer 4 is present around all the wire strands 1, the whole wire wire 1 is pressed at the time of pressing during coil forming. There is no possibility of the fusion force acting to cause popping out, and there is no deterioration of the coil space factor due to the reduction of the conductor cross-sectional area as in the case of using the central interposition of thermoplastic resin, resulting in high performance and high quality.

Further, according to this method, it is only necessary to pass the strands 1 bundled in parallel to each other through the die 5, and it is not necessary to newly provide a self-welding layer on the outside of the assembly line. In addition to dramatically improving the production efficiency of the self-bonding assembly line, the baking furnace for forming the outer self-bonding layer can be omitted,
Therefore, equipment cost and manufacturing space can be significantly reduced.

According to a second aspect of the present invention, in the method for producing a self-bonding assembly wire according to the first aspect, the diameter of the conductor 2 of the self-bonding insulating strand 1 is 0.1 to 0.3 mm, and Since the coating thickness on one side of the fusing layer 4 is set to 5 to 30 μm, the obtained self-fusing assembly line 11 has a sufficient conductor cross-sectional area and good self-fusing property.

According to a third aspect of the present invention, in the method for producing a self-bonding assembly wire according to the first or second aspect, the surface temperature of the electric wire when passing through the die is used as the resin component used for the self-bonding layer of the self-bonding insulating wire. Since the temperature is set to a temperature equal to or higher than the melting point and higher than the melting point by 60 ° C., the wire 1
The self-bonding layers 4 of ... Are reliably fused together, and the self-bonding assembly wire 11 obtained is such that the wires are firmly integrated with each other and the strands 1 are less likely to come apart during use.

According to a fourth aspect of the present invention, in the method for producing a self-bonding assembly wire according to any one of claims 1 to 3, the maximum diameter of the assembly wire 10 of the bundled self-bonding insulating wires 1 ... A, where Pn is the total thickness of the self-bonding layers 4 in this maximum diameter A, and D is the die diameter, (A-2 / 3)
・ Pn) ≦ D ≦ (A-1 / 3 · Pn) is set, so that the resin of the self-bonding layer 4 scraped when passing through the die 5 accumulates in the die 5 and is transferred to the surface of the wire. It is possible to surely avoid the occurrence of bumps and the collapse of the aggregate shape of the aggregate wire 10 due to the passage of the die 5, and thus it is possible to stably obtain the self-melting aggregate wire 11 having an excellent appearance and cross-sectional shape.

According to a fifth aspect of the present invention, in the method for producing a self-bonding assembly wire according to any of the first to fourth aspects, the insulating layer 3 and the self-bonding layer 4 are sequentially formed on the continuously running conductor 2 by coating and baking. Self-bonding strand 1 obtained following the forming step
While running continuously, bundle a plurality of them in parallel,
Since the integrated wire 10 is passed through the die 5 under heating to form the integrated wire 10, the production of the self-bonding element wire 1 to the production of the self-bonding assembly wire 11 can be performed in one continuous process, and the manufacturing efficiency is further improved. In addition, the manufacturing cost is further reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a cross section of a self-bonding insulating strand 1 used in the manufacturing method of the present invention. In this self-bonding insulating strand 1, an insulating layer 3 is formed on a conductor 2 and a self-bonding layer 4 is further formed on the insulating layer 3. Annealed copper wire having a diameter of about 0.1 to 0.3 mm is used for the conductor 2, polyurethane, polyester resin, polyesterimide resin, etc. are used for the insulating layer 3, and polyamide is used for the self-bonding layer 4.
A thermoplastic epoxy resin or the like is used, respectively.

The film thickness on one side of the self-bonding layer 4 of each strand 1 is set to be relatively thick, 5 to 30 μm. Then
If the thickness of this one-side coating is less than 5 μm, the self-bonding property of the finally obtained self-bonding assembly wire and the binding force between the wires 1 ... become insufficient, and when used for forming a coil, the wires are pressed during pressing. It becomes easy to cause the separation of 1 and the pop-out. On the other hand, if the thickness of the coating on one side exceeds 30 μm, the space factor of the coil using the self-bonding assembly line deteriorates due to the reduction of the conductor cross-sectional area, and the absolute amount of the fusion-bonding resin increases. The wire becomes stiff. The thickness of the insulating layer 3 is JIS C320.
It is set to correspond to 0 to 2 kinds of enamel wire in 2.

FIG. 2 shows an example of the construction of a method for producing a self-bonding assembly wire according to the present invention. In this case, a plurality of self-bonding insulating strands 1, ..., Which are continuously supplied, are bundled in parallel via the eye plate 6 and the guide die 7, and the bundled assembly line 10 is continuously compacted. By being introduced into a heating device 8 such as an electric furnace, heated, and forcedly passed through a die 5 arranged in the heating device 8, the self-bonding layers 4 of the individual wires 1 are fused to each other. The strands of wire 1, which are attached and are thus bundled in parallel, are wound up by a winder 9 as a self-bonding assembly line 11 integrated into a predetermined cross-sectional shape.

Here, the heating by the heating device 8 is preferably carried out to such an extent that the self-bonding layer 4 of the self-bonding insulating wire is semi-melted, and more preferably the surface temperature of the wire when passing through the die 5. It is preferable to set the melting point of the resin component used for the self-bonding layer 4 to a temperature 60 ° C. higher than the melting point. If this temperature is lower than the above melting point, the self-bonding layers 4 are not sufficiently joined to each other, and the obtained self-bonding assembly wire 11 is loosely bonded to the strands 1 ... Injuries are likely to occur. Further, the temperature is 6 above the melting point.
When the temperature exceeds 0 ° C. higher, the self-bonding layer 4 becomes excessively melted, and the assembly shape collapses when passing through the die 5, resulting in deterioration of the appearance and cross-sectional shape of the self-bonding assembly line 11. In a remarkable case, the resin of the self-bonding layer 4 in a molten state may be squeezed out by the die 5.

The diameter of the die 5 is such that, when the assembly wire 10 in which the self-bonding insulating wires 1 are bundled together, the wires 1 are forcibly brought into close contact with each other, and the self-bonding layer 4 is semi-melted by heating. …
Are set so as to be fused and integrated with each other without being scraped off by the die 4. Specifically, when the maximum diameter of the assembly line 10 before passing through the die is A, the total thickness of the self-fusing layer 4 occupying within the maximum diameter A is Pn, and the die diameter is D, (A-2 / 3 · Pn) ≦ D ≦ (A-1 / 3 · Pn) is preferably set. That is, D <(A-
In the case of 2/3 · Pn), the resin of the self-bonding layer 4 is easily scraped off when passing through the die 5 and easily accumulates in the die 5, and this is transferred to the surface of the electric wire to cause lumps, resulting in the self-bonding. The appearance of the assembly line 11 is deteriorated. In addition, D> (A-1 /
In the case of 3.Pn), the wire 1 is passed when passing through the die 5.
Of the self-bonding assembly wire 11 is deteriorated, and the binding force between the wires 1 ...

For example, when the target self-bonding assembly wire 11 is seven assembly wires, the assembly wire 10 before passing through the die 5 has seven self-bonding insulating wires 1 ... Arranged as shown in FIG. Therefore, the maximum diameter A of the assembly wire 10 is the sum of the diameters of the three strands 1, and a total of 6 layers of the self-bonding layer 4 (one strand 1 (Two layers on both sides in the radial direction)
Will be included. Here, if the finishing outer diameter of the wire 1 is a and the one-side coating thickness of the self-bonding layer 4 is P,
Total thickness Pn of self-bonding layer 4 = 6P, maximum diameter A = 3a
Therefore, the die diameter D is (3a-4P) to (3a-2
It may be set in the range of P).

Although not shown in FIG. 2, each strand 1 to be supplied to the eye plate 7 is obtained by molding the insulating layer 3 and the self-bonding layer 4 on the conductor 2 once. It may be constructed such that it is wound on a bobbin or the like and continuously fed out from this wound state.
It is possible to perform the production of 1 in a continuous process of 1 line. That is, following the step of sequentially forming the insulating layer 3 and the self-bonding layer 4 by coating and baking the coating material on the conductor 2 that runs continuously, the obtained self-bonding element wire 1 is continuously run and the eye plate 7 is formed. If the self-bonding assembly wire 11 is integrated by bundling it through the die and passing it through the die 5 under heating, the production efficiency can be further remarkably improved and the production cost can be further reduced.

The self-welding assembly line 11 thus obtained is
For example, as shown in FIG. 4, the self-bonding layers 4 of the individual wires 1 ... Fuse each other to cover the outer circumference of the assembly wire 11 and fill the spaces between the wires 1 ,. Are in a tightly integrated state. Therefore, when the self-welding assembly wire 11 is used for forming a coil, the self-bonding layer 4 exerts a welding force on all the wires ... In particular, high suitability is exhibited especially for winding of complicated shape such as a deflection yoke coil.
Although the number of the self-bonding insulating strands 1 is 7 in the figure, it is selected in the range of 3 to 61 depending on the application.

[0021]

EXAMPLE As shown in FIG. 1, an insulating layer 3 made of a polyester imide resin having a coating thickness of 20 μm on one side and a polyamide resin having a thickness shown in Table 1 below are self-fused on a conductor 2 made of an annealed copper wire having a diameter of 0.13 mm. The layer 4 is formed by coating and baking a resin, respectively, and the seven self-bonding insulating wires 1 ... Obtained are continuously run at a rate of 30 m / min from the manufacturing process thereof, as shown in FIG. As shown, they are bundled in parallel through the eye plate 6 and the guide die 7 to form an assembly line 10, and the assembly line 10 is introduced into a heating device 8 composed of a pipe-type electric furnace having a length of about 1.5 m. Die 5 while heating
In the method in which the wires 1 are forcibly pressed into contact with each other by passing through the wire, and are wound by the winding machine 15 as the integrated wire 11 in which the wires 1 are integrated, as shown in Table 1 below, The self-bonding assembly wire was manufactured by setting the film thickness on one side of the self-bonding layer 4, the surface temperature of the wire when passing through the die 5, and the diameter D of the die 5 to various values.

With respect to each self-fusion-bonded assembly wire obtained by the above method, the surface condition, the cross-sectional shape, the binding property of the wire, and the applicability (degree of loosening) to the deflection yoke coil were examined. The results are shown in Table 1 below.

[0023]

[Table 1]

From the above table, in the assembled wire (manufacturing No. 1) in which the film thickness on one side of the self-bonding layer 4 of the wire 1 is less than 5 μm (manufacturing No. 1), the bonding property between the wires is inferior and the cross-section collapses. , If the wire surface temperature is too low when passing through the die 5, (manufacturing No.
In the case of 8), the coil winding property is poor because the cross-section is significantly broken due to the poor binding between the wires, and the temperature is too high (manufacturing N
o. In the case of 9), the surface appearance deteriorates due to excessive melting of the self-bonding layer, and when the die diameter D is larger than the above-mentioned range (Production No. 7), the binding property between the wires is poor and the cross section It can be seen that the deterioration of the shape is caused, and when the die diameter D is too smaller than the above range (Production No. 3), the electric wire surface has a lump and the appearance becomes poor.

[0025]

According to the first aspect of the present invention, when manufacturing a self-welding assembly wire having a structure in which a plurality of insulating wires are bundled in parallel, a self-bonding insulation wire group in an assembled state is heated. A self-bonding assembly wire can be obtained by simply passing it through a die below, and it does not require the step of providing a self-bonding layer on the outside of the polymerized wire that bundles the insulation wires as in the conventional method However, the manufacturing efficiency of the self-bonding assembly line is dramatically improved, and the baking furnace for forming the outer self-bonding layer can be omitted,
Therefore, equipment cost and manufacturing space can be significantly reduced. Moreover, the resulting self-bonding assembly wire is in a state where the self-bonding layer exists around all the wires, so there is no risk of the wires coming off during pressing during coil forming, In addition, there is no deterioration of the coil space factor due to the reduction of the conductor cross-sectional area as in the case of using the center interposition of thermoplastic resin, high performance and high quality, especially the winding of the shape such as the deflection yoke coil. It has excellent suitability for use.

According to the second aspect of the present invention, in the above manufacturing method, the conductor diameter of the self-bonding insulating element wire and the film thickness on one side of the self-bonding layer are set within specific ranges, so that a sufficient conductor cross-sectional area is provided. Further, there is an advantage that a self-bonding assembly line having a good self-bonding property can be obtained.

According to the third aspect of the invention, in the above manufacturing method, the wire surface temperature when passing through the die is set in a specific range, so that the mutual binding of the wires is strong and the wires do not come apart during use. There is an advantage that a self-bonding assembly line that is less likely to occur can be obtained.

According to the fourth aspect of the invention, in the above manufacturing method, the die diameter is set to a specific range with respect to the maximum diameter of the assembly line before passing through the die, so that the surface has no spots and has a good appearance. There is an advantage that a self-bonding assembly line having an excellent cross-sectional shape can be stably obtained.

According to the fifth aspect of the present invention, in the above manufacturing method, the production of the self-bonding element wire to the production of the self-bonding assembly wire can be performed in one continuous process, so that the production efficiency is further improved. There is an advantage that the manufacturing cost can be further reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a self-bonding insulating strand used in the present invention.

FIG. 2 is a schematic process diagram showing a method for manufacturing a self-bonding assembly wire according to the present invention.

FIG. 3 is a sectional view of an assembly line before passing through a die in the manufacturing method.

FIG. 4 is a sectional view of a self-bonding assembly line obtained by the same manufacturing method.

[Explanation of symbols]

 1 Self-Fusing Insulation Wire 2 Conductor 3 Insulating Layer 4 Self-Fusing Layer 5 Dice 6 Eye Plate 7 Guide Die 8 Heating Device 9 Winding Machine 10 Assembly Line Before Passing Dice 11 Self-Fusing Assembly Line A Before Passing Die Maximum diameter of wire assembly P P one-sided film thickness of self-bonding layer a Finished diameter of wire

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Noriaki Harada 1073 Eda, Shigaraki-cho, Shiga Prefecture Oda Didy Melco Laboratory (72) Inventor Hideo Doshita Inodaji, Amagasaki-shi, Hyogo No. 19-1 Inside the winding technology development department, Daiichi Denko Co., Ltd. (72) Inventor Masahiro Oyano 2-19-1 Inadera, Amagasaki City, Hyogo Prefecture Inside the winding technology development department, Daiichi Denko Corporation (72) Inventor Tetsuo Uchida Niigata 70 Sekigawa Nakagawara, Myokokogen-cho, Nakakubiki-gun, Fukushima Daiichi Denko Corporation Winding Division (72) Inventor Hideo Kimura 3-1-1 Marunouchi, Chiyoda-ku, Tokyo International Building 9F Daiichi Denko Co., Ltd.

Claims (5)

[Claims] 1. A plurality of self-fusing insulating element wires, which are formed by sequentially forming an insulating layer and a self-fusing layer on a conductor, are passed through a die while heating them while being bundled in parallel. A method for producing a self-bonding assembly line, characterized in that the self-bonding layers of the wires are forcibly fused together to form an integral assembly line. 2. The conductor diameter of the self-bonding insulating wire is 0.1 to 10.
0.3 mm, the thickness of one side of the self-bonding layer of the wire is 5
The method for producing a self-bonding assembly line according to claim 1, which has a thickness of 30 μm. 3. The surface temperature of the electric wire when passing through the die is set to a range not lower than the melting point of the resin component used for the self-bonding layer of the self-bonding insulating strand and higher than the melting point by 60 ° C. 1. The method for producing the self-bonding assembly wire according to 1 or 2. 4. A is the maximum diameter of a bundle of self-bonding insulating wires bundled before passing through a die, Pn is the total thickness of the self-bonding layer in the maximum diameter A, and D is the die diameter. Then, (A-2 / 3 · Pn) ≦ D ≦ (A-1 / 3 · P
It sets to n), The manufacturing method of the self-bonding assembly line in any one of Claims 1-3 characterized by the above-mentioned. 5. A self-bonding element wire obtained continuously following a step of sequentially forming an insulating layer and a self-bonding layer by coating and baking a coating material on a conductor that runs continuously, while continuously running a plurality of the self-bonding element wires. The method for producing a self-bonding assembly line according to any one of claims 1 to 4, wherein the assembly lines are bundled in parallel and passed through a die under heating to form an integrated assembly line.