JPH02181308A - Self-fusing cluster cable - Google Patents

Abstract

PURPOSE:To obtain a cluster cable with better flexibility and leadability by providing self-fusing portions for intermittently fixing insulative wires in the longitudinal direction of the cluster cable. CONSTITUTION:A self-fusing cluster cable is composed by bundling together insulative wires 15 so as to have circular cross sections each insulative wire 15 comprising an insulative layer 13 composed of resin such as polyhydantoinester and polyesteramide and a self-fusing layer 14 composed of thermoplastic resin such as epoxy resin and phenoxy resin. A self-fusing bands 16 for intermittently fixing the insulative wires 15 in the longitudinal direction of the cluster cable is provided. This self-fusing band 16 functions to fix the insulative wires 15 together and to fix a coil around which the self- fusing cluster cable 11 with help of the self-fusing layer 14. The self-fusing band 16 is made of resin the same as the one forming the self-fusing layer 14. Accordingly, the self-fusing cluster cable, with better flexibility and leadability is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a self-bonding wire assembly suitable for use in high frequency transformers, deflection yokes, and the like.

[Conventional technology]

Conventionally, self-bonding litz wire is sometimes used for winding wires for such high-frequency coils. Figures 7 and 8
The figure shows an example of this self-bonding litz wire. The self-bonding wire 1 shown in FIG. A plurality of insulated wires 4 are twisted together. Further, the self-bonding lip wire 1 shown in FIG. 8 is obtained by twisting a plurality of insulating wires 4 together and then forming a self-bonding layer 6 over the entirety of the twisted wires.

[Problem to be solved by the invention]

However, when the self-bonding wire shown in Fig. 7 is wound to form a fill, it is twisted and untwisted, and is susceptible to stress due to twisting. There are disadvantages such as deformation of the insulating layer 3 and generation of an interlayer short circuit (layer short circuit) of the coil.

On the other hand, in the case of the self-fusing twisted wire shown in Fig. 8, although there is no untwisting, the thickness of the entire wave layer becomes thicker.
Flexibility is reduced, ease of handling and ease of accessing the terminal. Also, during manufacturing, the self-adhesive layer 6
When forming the self-adhesive layer 6, there is a drawback that the self-bonding layer 6 foams due to air remaining in minute portions of the strands.

Furthermore, since any self-bonding litz wire is a twisted wire, there is a problem in that the electrical resistance per unit length force becomes large.

[Means to solve the problem]

In this invention, a plurality of insulated wires or insulated wires having a self-bonding layer are bundled together to form a collective wire, and a self-fusion portion is provided in the longitudinal direction of the collective wire to intermittently fix the insulated wires. The above problem was solved by this.

[Effect]

Since each insulated wire is intermittently fixed with self-bonding bands, the insulated wire will not come apart during coiling.
Moreover, it has extremely excellent flexibility as a self-bonding collective wire. Also, since there are parts where the overall coating thickness is thin,
He is also good at speaking out. Furthermore, the electrical resistance per unit length force is also low because there is no twist.

The present invention will be explained in detail below.

FIGS. 1 to 3 show an example of a self-bonding wire assembly according to the present invention, and reference numeral 11 in the figures indicates the self-bonding wire assembly. This self-bonding wire assembly 11 is made of polyurethane, polyvinyl formal, polyester, etc. on a conductor 12 made of copper, copper alloy, aluminum, aluminum alloy, etc.
Polyesterimide, polyhydantoin, polyamideimide.

Polyester amide imide An insulating layer 13 made of a resin such as polyhydantoin ester or polyester amide, and a thermoplastic resin such as polyamide, polyvinyl butyral, polysulfone, polysulfone ether, evo cow resin, or phenol cow resin on this insulating layer 13 The insulated wires 15 having the self-bonding layer 14 are bundled together so that the cross-sectional shape is circular to form a collective wire,
Self-fusing bands 16 for fixing the insulated wires 15 intermittently in the longitudinal direction of the collective wire are provided.

The self-fusing portion 16 functions together with the self-fusing layer 14 to bond the insulated wires 15 to each other, and also to fix the coil after the self-fusing wire assembly 11 is wound into a coil. It is made of the same resin as the self-fusing layer 14. The length of the self-fusion part 16 is usually 0.5D, where Dam is the outer diameter of the bundled wires.
As mentioned above, it is preferably about 110.5D to 20Dm+s, and the distance between the two self-fused parts 16.16 is usually 30Dm+s.
0D or less, preferably about D to 50Dm@,
- Self-bonding part 1 in the self-bonding collective wire 11
The lengths of 6 and the intervals between them do not necessarily have to be constant (they may be changed as appropriate.
6 can be formed by bundling the insulated wires 15... together, and then intermittently dropping and coating the resin liquid for the self-adhesive band onto the collecting wires while running the collecting wires. can be adopted. Further, the resin constituting the self-bonding layer 14 and the self-bonding part 16 is not limited to the thermoplastic resin described above, and may include incyanate compounds, phenol resins, amine compounds, acid It is also possible to improve the heat resistance and adhesion after coil winding by using a thermosetting resin containing anhydride, etc., and the heat resistance, fusion conditions, and soldering characteristics of self-bonding collective wires can be improved. It can be selected as appropriate, taking into account the presence or absence of such information.

Of course, the resins forming the autofusion bone layer 14 and the autofusion portion 16 may be the same or different.

FIGS. 4 to 6 show other examples of the self-bonding collective wire of the present invention, in which m several simple insulating wires 17 without a self-bonding layer are arranged in a substantially circular shape. The wires are bundled together, and self-welding portions 16 similar to the previous example are formed intermittently in the longitudinal direction of the wire assembly. Even with this self-fusion single wire assembly, by heating the coil after winding it into a coil, the self-fusion portions 16 are melted, and the coil can be fused and solidified.

Since such a self-fusing collective wire has good high frequency characteristics, it is particularly suitable for high frequency coils such as horizontal deflection coils of CRT display devices.

〔Example〕

- Apply polyester to a conductor with a diameter of 0.12 mff1, bake it, and make an insulated wire with an outer diameter of 0.16 m5 (referred to as wire A).

)It was created.

・Coat the strand A with phenoxy resin as a self-bonding layer,
A self-bonding insulated wire (referred to as wire B) with a finished diameter of 0.19 m was prepared.

(Example 1) Seven strands B are bundled together, and the length is 2°5-m in the longitudinal direction.
Self-bonding parts made of phenoxy resin having a length of 0.7 mm were intermittently formed at intervals to obtain a self-bonding wire assembly.

(Example 2) Seven strands A are bundled together, leaving a 2° lea in the longitudinal direction.
Self-bonding parts made of phenoxy resin having a length of 0.7 am were intermittently formed at intervals to obtain a self-bonding collective wire.

(Comparative example 1) A Litz wire was obtained by twisting seven strands of wire A together.

(Comparative example 2) Seven strands of wire B were twisted together to obtain a self-bonding litz wire.

(Comparative Example 3) Seven strands of wire A were twisted together, and a self-bonding layer made of phenoxy resin was provided over the entire length of the strands to obtain a self-bonding litz wire.

(Comparative example 4) Seven wires A were bundled together to obtain a collective wire.

(Comparative Example 5) Seven strands A were bundled together, and a self-bonding layer made of phenoxy resin was provided over the entire length of the wires to obtain a self-bonding collective wire.

Regarding the wires and collective wires obtained in these Examples and Comparative Examples, ■Self-fusion properties ■No deformation of the strands at the same time as coil winding ■Easy to pull out ■Presence or absence of foaming in the self-fusion part■Flexibility■
The electrical resistance per unit length was evaluated. Self-fusing property is
A Litz wire and a collective wire were wound into a coil, and the film was heated at 170° C. for 15 minutes to determine whether or not it was fused.

Deformation of the strands was determined by determining that the outer diameter of the collective wire and the Litz wire varied by 10% or less before and after coil winding. The removability was determined by the adhesion of solder (460° C., 2 seconds). Foaming in the self-fused portion was visually determined. The flexibility was expressed by the Bosch method as a relative value when the litz wire of Comparative Example 1 was set to 1.0. The electrical resistance is t
It is expressed as DC resistance per x.

The results are shown in Table 1.

As is clear from Table 1, the self-bonding collective wire of the present invention has excellent flexibility, lead-out properties, and self-bonding properties, does not come loose during coil winding, and has low electrical resistance. It can be seen that it is low compared to

〔Effect of the invention〕

As explained above, the self-bonding wire assembly of the present invention is produced by bundling together a plurality of insulated wires or insulated wires provided with a self-bonding layer, and intermittently inserting the insulated wires in the longitudinal direction. Since it is provided with a self-fused part that fixes, the insulated wire does not come loose during coil winding (and has good flexibility).

In addition, it has sufficient self-fusion properties and is also excellent in opening properties. Furthermore, the electrical resistance per unit length is low, there is no foaming in the self-fusion portion, and the amount of self-fusion resin used can be reduced.

[Brief explanation of the drawing]

Figures 1 to 3 show an example of the self-adhesive collective wire of the present invention, where Figure 1 is a side view, Figure 2 is a sectional view taken along the line ■-■ in Figure 1, and Figure 3 is a cross-sectional view taken along the line ■-■ in Figure 1. 1 is a sectional view taken along the line III-III in FIG.
6 is a sectional view taken along the line Vl-Vl of FIG. 4, and FIGS. 7 and 8 are sectional views showing examples of conventional self-bonding litz wires. . Self-bonding collective electric wire, conductor, ・Insulating layer, ・・Self-bonding layer, ・・Insulating strand having a self-bonding layer, ・・Self-bonding part, ・・Insulating strand.

Claims (1)

[Claims] A collective electrical wire in which a plurality of insulated strands or insulated strands having a self-bonding layer are bundled together in a substantially circular cross-sectional shape, and the insulated strands are disposed intermittently on the collective electrical wire in the longitudinal direction of the collective electrical wire. A self-bonding collective electric wire characterized by being provided with a self-bonding part that fixes.