JP2002289042A - Self adhesive insulated electric wire and multi-core parallel insulated electric wire using the same, and their manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self adhesive insulated electric wire having superb adhesiveness to a material adhered to, to provide a multi-core parallel insulated electric wire such as a ribbon wire and a flat cable with greatly enhances the productivity, and to provide their manufacturing apparatus. SOLUTION: The rough surface portion 13 is placed around the inner periphery of the exit of a nozzle of an extruder which manufactures a self adhesive electric wire. By contacting the melt resin 15 to the rough surface, roughness is formed on the surface skin 5a of the adhesive layer 5 placed on the outer periphery of the insulating wire core 4. The contacting layer 5 therefore has the enlarged surface area and becomes readily softened by heating to give adhesiveness required to enhance the productivity, when a multi-core insulated electric wire such as a ribbon wire and a flat cable is manufactured by adhering a plural number of the adhesive electric wires aligned parallel in a bundle. The rough surface skin 5a eliminates technical cares of selecting the material and composition of the adhesive layer 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-adhesive insulated wire excellent in adhesiveness, and a ribbon wire, a flat cable and the like obtained by bonding a plurality of such self-adhesive insulated wires side by side and in parallel. The present invention relates to a multi-core parallel insulated electric wire and an apparatus for manufacturing the same.

[0002]

2. Description of the Related Art A self-adhesive insulated wire is formed by extruding and covering an insulator such as a vinyl chloride resin on a conductor such as a copper stranded wire to form an insulated core, and an adhesive provided on the outer periphery of the insulated core. Heating and softening the layer facilitates adhesion to the member to be bonded. A conventional example of this type of self-adhesive insulated wire is disclosed in Japanese Patent No. 2890279.

A multi-core parallel insulated electric wire such as a ribbon electric wire or a flat cable is obtained by bundling a plurality of such self-adhesive insulated electric wires side by side in parallel and bonding them together with an adhesive layer. A conventional example is disclosed in Japanese Patent Application Laid-Open No. 5-144323.

[0004]

In the case of the conventional self-adhesive insulated wires and multi-core parallel insulated wires described above, since the surface of the adhesive layer provided on the outer periphery thereof is smooth, they are softened by heating and bonded. Sufficient adhesiveness may not be obtained at the time of work to adhere to a partner member or at the time of production, and there is a problem in workability and manufacturability. In addition, in order to enhance the adhesiveness of such an adhesive layer, material selection and composition are devised,
There is a problem that these techniques are difficult, and that the improvement and review of the existing equipment are required every time the material is changed, so that the development cost is soared.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a self-adhesive insulated wire having excellent adhesion to a member to be bonded and an apparatus for manufacturing the same. It is an object of the present invention to provide a multi-core parallel insulated wire and a device for manufacturing the same.

[0006]

In order to achieve the above object, a self-adhesive insulated wire according to the present invention according to the first aspect of the present invention comprises an insulated wire formed by extruding and covering an insulator 3 on a conductor 2. An adhesive layer 5 having a roughened surface is provided on the outer periphery of the substrate 4.

With the above configuration, the surface area of the adhesive layer 5 is increased as much as the surface of the adhesive layer 5 is roughened, and the heat is efficiently transmitted when heated in the post-processing, so that an effective adhesive property is obtained by softening. As a result, when performing wiring work such as bonding to a member to be bonded, such as the equipment panel surface, along the wiring route, bonding is easier and more efficient than conventional self-adhesive insulated wires having a smooth adhesive layer. Is further enhanced.

[0008] The apparatus for manufacturing a self-adhesive insulated wire according to the second aspect of the present invention includes a cylindrical extrusion die 10 through which an insulating core 4 formed by extruding and covering an insulator 3 on a conductor 2 is passed.
A rough surface portion 13 is provided on at least the inner peripheral surface of the outlet end portion 12 of the extrusion die 10, and the adhesive molten resin filled in the extrusion die 10 is extruded to form the rough surface portion 1.
3, an adhesive layer 5 roughened on the outer periphery of the insulated wire core 4.
Characterized in that it can be formed as

With the above configuration, the rough surface portion 13 is provided on the inner peripheral surface of the extrusion die 10 on the cylindrical outlet side, so that the molten resin comes into contact with the rough surface portion 13 and the surface of the adhesive layer 5 extruded. The heat transfer during heating is good as much as the surface area is increased, and the adhesiveness due to softening is increased, and the adhesion to the member to be bonded becomes easy. Therefore, as in the conventional case, the labor required for selecting the material and composition of the adhesive layer 5 with the aim of improving the adhesiveness is reduced.

A multi-core parallel insulated wire according to a third aspect of the present invention is obtained by bundling a plurality of the self-adhesive insulated wires according to the first aspect in a row and bonding them in parallel to each other with an adhesive layer 5 on the outer periphery. It is characterized by being integrated.

With the above structure, the adhesiveness when the adhesive layer 5 is roughened as described above and heated and softened by an amount corresponding to the increase in the surface area is increased, and such a plurality of self-adhesive insulated wires are adhered in parallel. In this case, the productivity in the case of manufacturing a multi-core parallel insulated electric wire integrated by the above-described method can be improved.

Further, the apparatus for manufacturing a multi-core parallel insulated wire according to claim 4 is provided with a molding block 23, and the fusion guide groove 24 provided on the entire length of the block gradually increases the width from the groove entrance 25 to the groove exit 26. The plurality of self-adhesive insulated wires are passed through the fusing guide groove 24 and heated and squeezed so that they can be fused to each other by the adhesive layer 5 on their outer periphery. It is characterized by.

With the above configuration, when a plurality of self-adhesive insulated wires bundled by the fusion guide grooves 24 of the molding block 23 are squeezed while being heated, the plurality of self-adhesive insulated wires are softened by heat and drawn by the drawing force. By easily and surely bonding the electric wires to each other with the adhesive layer 5, the productivity of the multi-core parallel insulated electric wire is remarkably improved as compared with the related art.

Further, the apparatus for manufacturing a multi-core parallel insulated wire according to the fifth aspect is characterized in that a release agent layer 28 is provided on the entire surface of the fusion guide groove 24.

With the above configuration, the release agent layer 28 is provided in the fusion guide groove 24 of the molding block 23, so that the molded multi-core parallel insulated electric wire is easily separated from the molding block 23 and released. .

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a self-adhesive insulated wire and a multi-core parallel insulated wire according to the present invention and their respective manufacturing apparatuses will be described below in detail with reference to the drawings.

FIGS. 1 (a) to 1 (d) are side sectional views showing an extrusion die 10, which is a main part of a device for manufacturing a self-adhesive insulated wire 1 according to the present embodiment. A-
A, B-B, and CC show longitudinal sectional views, respectively. For example, a metal extrusion base 10 is provided with a base body 11.
Is formed into a cylindrical body such as a tapered nozzle. The rear end of the base body 11 has a large diameter opening as an entrance on the side where the insulated wire core 4 described below is introduced.
The nozzle-shaped tip 12 has a small diameter opening as the outlet end in the present invention.

In the vicinity of the outlet of the nozzle-shaped front end portion 12, as shown in FIG. 1 (c) which is a longitudinal sectional view taken along the line BB of FIG. Face part 1
3 is formed. The roughened shape of the rough surface portion 13 is not particularly limited, but may be discontinuous streaks or notches, and irregularly dotted concave portions (dents) and convex portions (raised portions).

As shown in FIG. 1B, which is a longitudinal sectional view taken along the line AA of FIG. 1, an insulated wire core 4 which is a core wire of the self-adhesive insulated wire 1 is made of a copper stranded wire or the like. An insulator 3 such as a vinyl chloride resin is extruded and coated on the conductor 2. That is, the insulated wire core 4 supplied from the production line in the previous process is fed into the extrusion die 10 from the rear end entrance.

From the above, the insulated wire core 4 is introduced into the extrusion die 10, and the molten resin 15 having the adhesive property is simultaneously supplied to the inside of the die body 11 in a filled state. Extruded on the outer circumference. The molten resin 15 is squeezed by being pushed toward the tapered tip portion 12 of the nozzle body 11 having a tapered shape, and comes into contact with the rough surface portion 13 immediately before the outlet of the tip portion. Molten resin 15 whose surface is roughened by contact with rough surface 13 on the base side
As shown in FIG. 1 (d), which is extruded from the outlet of the extrusion die 10, and is a longitudinal sectional view taken along line CC, as an adhesive layer 5 having a rough surface skin 5 a, The self-adhesive insulated wire 1 is manufactured by cooling and hardening.

As the molten resin 15 forming the adhesive layer 5, a thermoplastic resin such as a polyvinyl butyral resin, a polyamide resin, a phenoxy resin, a polyolefin resin, or a thermosetting resin such as an epoxy resin, a melamine resin, or a ferrule resin is used. Can be used. Or,
It is also possible to use a mixture of any one or more of these thermoplastic resins and thermosetting resins. Although not particularly limited, for example, a melting point of 107 ° C. and a softening temperature of 8
Ethylene-ethyl acrylate resin (EEA) having a characteristic of 1 ° C. can be used.

When the self-adhesive insulated wire 1 manufactured as described above is wired with a single wire adhered to a member to be adhered, such as a device panel surface, the outermost adhesive layer 5
In this state, or when an appropriate amount of heat is applied, the adhesive layer 5 is softened and the adhesiveness is further increased, so that the adhesive layer 5 can be easily and effectively adhered to the member to be adhered. In other words, since the adhesive layer 5 has a rough surface skin 5a, the surface area increases accordingly, and when heated, the heat transfer is good and the softening is combined with the softening, so that the adhesiveness increases, and the adhesion to the mating member becomes effective. .

Next, a plurality of self-adhesive insulated wires 1 are simultaneously extruded and sent out, and they are bundled side by side in parallel and bonded to each other to be united to form a multi-core ribbon or flat cable. Parallel insulated wires can be manufactured with the equipment described below. In this case, as an apparatus and a manufacturing method in the preceding process, a plurality of extrusion die 10 shown in FIG. 1A are laid out in a horizontal row, and a plurality of self-adhesive insulated wires 1 are simultaneously extruded from them. Can be sent out.

FIGS. 2 and 3 show a main part apparatus 20 for manufacturing such a multi-core parallel insulated wire 30. FIG. This device 20 is mainly composed of a heater 21 having a heat supply pipe 22 and the like, and a molding block 23 heated by the heater 21.

As is apparent from the bottom view of the molding block 23 shown in FIG. 3, a fusion guide groove 24 is provided over the entire length of the block. Fusion guide groove 24
Has a tapered shape in which the width is gradually reduced from the groove entrance 25 to the groove exit 26, or a shape in which both side wall surfaces 27 that gradually taper as shown in the illustrated example are curved. The release agent layer 28 is provided by coating over the entire surface of the fusion guide groove 24.

From the above configuration, the plurality of self-adhesive insulated wires 1 are side-by-side and adhered to each other in parallel to form a single-core parallel insulated wire 30. The plurality of self-adhesive insulated wires 1 sent on the production line in the previous process are aligned and inserted into the fusing guide grooves 24 of the molding block 23.
Introduced from 5. The molding block 23 is heated by the heater 21 to a suitable set temperature, for example, 120 ° C. Since the fusion guide groove 24 is gradually tapered toward the groove outlet 26, a squeezing force acts on the bundled plurality of self-adhesive insulated wires 1 from both the left and right sides, so that those wires are arranged side by side. The bundle is compressed and the heater 2
The heat of 1 softens each adhesive layer 5. The surface skin 5a of the adhesive layer 5 has a large surface area corresponding to the roughness, the heat is efficiently transmitted, the adhesiveness is increased, and the adhesive is adhered to each other to be unified. Extruded as The release agent of the release agent layer 28 adheres to the surface of each of the adhesive layers 5 while passing through the fusion guide groove 24 until the step of extruding outside the block.

That is, the mold release agent adheres to the skin of the formed multi-core parallel insulated wire 30 by the mold release agent layer 28, and the mold release from the fusion guide groove 24 is facilitated. Increase.

[0028]

As described above, in the self-adhesive insulated wire according to the first aspect of the present invention, the surface area is increased by the roughened surface of the adhesive layer, and the surface is heated by post-processing. In some cases, heat is efficiently transmitted, and effective adhesion is obtained by softening. As a result, when bonding to a member to be bonded, such as a device panel surface, along the wiring route, the work of pasting and wiring increases.

In the apparatus for manufacturing a self-adhesive insulated wire according to a second aspect of the present invention, the extrusion die is provided with a rough surface portion on the inner peripheral surface on the cylindrical outlet side. The surface of the adhesive layer extruded in contact with the surface becomes rough, and the larger the surface area, the better the heat transfer during heating, the more the adhesiveness due to softening increases, and the easier it is to adhere to the mating member. For this reason, as in the related art, the labor required for selecting the material and composition of the adhesive layer with the aim of improving the adhesiveness is reduced.

Further, in the multi-core parallel insulated wire according to the third aspect, the adhesiveness when the adhesive layer 5 is roughened as described above and heated and softened by an amount corresponding to the increase in the surface area increases. When manufacturing a multi-core parallel insulated wire in which self-adhesive insulated wires are bonded in parallel and integrated, productivity is increased.

In the apparatus for manufacturing a multi-core parallel insulated wire according to the fourth aspect, when a plurality of self-adhesive insulated wires bundled by the fusion guide groove of the molding block are squeezed while being heated, softening due to heat is caused. By easily and surely bonding a plurality of self-adhesive insulated wires to each other with their adhesive layers by the drawing force, the productivity of multi-core parallel insulated wires is significantly improved as compared with the conventional case.

In the apparatus for manufacturing a multi-core parallel insulated wire according to the fifth aspect, the release agent layer is provided in the fusion guide groove of the molding block, so that the multi-core parallel insulated wire formed from the molding block. It is easy to peel off and release the mold, and the molding work is streamlined.

[Brief description of the drawings]

FIG. 1 (a) is a side sectional view showing an extrusion die of a main part of an apparatus for manufacturing a self-adhesive insulated wire according to the present invention,
FIG. 2B is a vertical cross-sectional view of the insulated wire core from the line AA in the arrow direction.
FIG. 4C is a vertical cross-sectional view of the base-side roughened surface portion taken along line BB, and FIG. 4D is a vertical cross-sectional view of the self-adhesive insulated wire after manufacture from line CC. It is.

FIG. 2 is a perspective view showing a heater and a molding block of a main part of an apparatus for manufacturing a multi-core parallel insulated wire according to the present invention.

FIG. 3 is a bottom perspective view of a single molded block of the multicore parallel insulated wire manufacturing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Self-adhesive insulated electric wire 2 Conductor 3 Insulator 4 Insulated wire core 5 Adhesive layer 5a Surface skin 10 Extrusion base 11 Base body 12 Nozzle-like tip part of base 13 Rough surface part 15 Molten resin forming adhesive layer 21 Heater 23 Molding block 24 Fusing guide groove 25 Wide groove entrance 26 Narrow groove exit 27 Groove side surface 28 Release agent layer 30 Multi-core parallel insulated wire

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01B 13/00 H01B 13/00 525H

Claims (5)

[Claims] 1. A self-adhesive insulated wire, characterized in that an insulated wire obtained by extruding and covering an insulator on a conductor is provided with an adhesive layer having a roughened surface on the outer periphery. 2. A cylindrical extrusion die for passing an insulated wire core formed by extruding and covering an insulator on a conductor, and a rough surface is provided on at least an inner peripheral surface of an exit end of the extrusion die.
A self-adhesive insulated wire, characterized in that the adhesive molten resin filled in the extrusion die is extruded to form a roughened adhesive layer on the outer periphery of the insulated wire core by the rough surface portion. Manufacturing equipment. 3. A multi-core parallel wire comprising a plurality of the self-adhesive insulated wires according to claim 1, which are bundled side by side in parallel and bonded to each other with an adhesive layer on an outer periphery. Insulated wires. 4. A molding block for molding the multi-core parallel insulated wire according to claim 3, wherein a fusion guide groove provided in the entire length of the block has a tapered shape in which a width is gradually reduced from a groove entrance to a groove exit. Wherein the plurality of self-adhesive insulated wires are passed through the fusion guide groove, heated and squeezed so that they can be fused to each other by an adhesive layer on their outer periphery. Equipment for manufacturing parallel insulated wires. 5. The apparatus for manufacturing a multi-core parallel insulated wire according to claim 4, wherein a release agent layer is provided on the entire surface of said fusion guide groove.