JPH05298930A - Collecting insulated electric wire - Google Patents

Abstract

PURPOSE:To dispense with the impregnation of resin and harden the resin after coiling and rationalize coil manufacturing process by forming a melting layer on a fixing layer and setting the melting point of the resin for the melting layer lower than the melting point of the resin for the fixing layer. CONSTITUTION:Regarding a collective insulated electric wire 1, a melting layer 6 is newly formed on a fixing layer 3 and the melting point of the resin for the layer 6 is set to be lower than the melting point of the resin for the fixing layer 3. When the electric wire is heated after the electric wire 1 is coiled on a coil at the temperature higher than the melting point of the resin for the layer 6 and lower than the melting point of the resin for the layer 3, the resin for the layer 6 is melted and the gap between the coiled wire is fixed by the resin and the resin for layer 3 is not melted, so that deformation such as untwisting, etc., of the enameled element wires 2 does not occur. The layer 6 is made of a thermally plastic resin and the layer 3 is made of a thermosetting resin. Or the layer 6 is made of an alcohol-soluble resin and the layer 3 is made of an alcohol-insoluble resin. Deformation such as loosening of the wires 2 is also prevented in this way and coil manufacture is rationalized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collective insulated wire used as a coil winding for magnetic heads, relays, noise filters and the like.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a conventional insulated insulated wire. The insulated wire 1 shown in FIG.
It is a tape-shaped one in which the enamel element wires 2 of a book are aligned in parallel and integrated by a fixing layer 3. The enamel element wire 2 is formed by covering the conductor 4 with the insulating layer 5.
Further, the collective insulated electric wire 1 shown in FIG. 4 is formed by twisting seven enamel element wires 2 and integrating them by the fixing layer 3. The fixing layer 3 in the collective insulated electric wire 1 is for preventing the enamel element wire 2 from being distorted or untwisted, and is usually made of polyamide, polyvinyl butyral,
It is formed by coating a resin such as epoxy with a thickness of about 5 to 20 μm.

By the way, if a coil using such a collective insulated wire is left as it is after winding the coil, the coil may be deformed at the time of assembling or during use, or the magnetostrictive vibration during use may cause the collective insulated wire to be separated from each other. Rubbing may cause the fixing layer 3 and the insulating layer 5 to be worn, resulting in a short circuit between lines. For this reason, usually, after winding the coil, the coil is impregnated with epoxy resin or the like, and is cured to solidify and integrate the coil.

However, the impregnation and curing of the resin such as the epoxy resin has two disadvantages such as an impregnation step and a curing step, and a dedicated device is required.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a collective insulated wire which does not require a resin impregnation curing treatment after winding a coil and can rationalize the coil production.

[0006]

[Means for Solving the Problems] This problem is that a fusion layer is newly provided on the fixation layer of a conventional insulated wire and the melting point of the resin forming the fusion layer is lower than that of the resin forming the fixation layer. Or the fusion layer is made of a thermoplastic resin and the fixing layer is made of a thermosetting resin, or the fusion layer is made of an alcohol-soluble resin and the fixing layer is made of an alcohol-insoluble resin. ..

First, the invention according to claim 1 will be described. 1 and 2 both show an example of the present invention. In this aggregated insulated wire 1, a fixing layer 3 is newly covered with a fusion bonding layer 6. Further, the melting point of the resin forming the fusion bonding layer 6 is set to be lower than the melting point of the resin forming the fixing layer 3. As a concrete combination example of such resins, when a polyvinyl butyral resin or a phenoxy resin is used as the resin forming the fusing layer 6, the fixing layer 3 is used.
A polyamide resin is used as the resin forming the.

The difference between the melting point of the resin forming the fusion layer 6 and the melting point of the resin forming the fixing layer 3 is preferably as large as possible, but it is necessary to secure at least about 25 to 50 ° C. after the coil winding. This is desirable because it facilitates temperature control during the process.
Further, the formation of such a fusion-bonding layer 6 is carried out by the assembled insulated electric wire 1
It is carried out by applying and baking a varnish made of the above resin on the fixing layer 3. The thickness of the fusion layer 6 is 5 to 20 μm.
It is preferably about m.

In such an aggregate insulated wire 1, after being wound around a coil, the melting point of the resin forming the fusion bonding layer 6 is higher than the melting point of the resin.
Further, if the resin forming the fixing layer 3 is heated at a temperature lower than the melting point of the resin, the resin forming the fixing layer 6 is melted, the windings of the coil are fixed by the resin, and the resin forming the fixing layer 3 is not melted. No deformation such as twisting back of the enamel element wire 2 occurs.

The insulated wire of the invention according to claim 2 is
The fusing layer 6 is made of a thermoplastic resin, and the fixing layer 3 is made of a thermosetting resin. Polyamide, polyvinyl butyral, phenoxy and the like are used as the thermoplastic resin forming the fusion layer 6, and polyamide, polyvinyl butyral, phenoxy resin and the like are amino resins and stabilized isocyanates as the thermosetting resin forming the fixing layer 3. , Those containing a phenol resin, etc. are used. The fixing layer 3 and the fusing layer 6 are formed by applying and baking an ordinary varnish, and the thickness of the fixing layer 3 is 5 to 20 μm.
The fusing layer 6 has a thickness of about 5 to 20 μm.

In such an assembled insulated wire 1, after being wound around a coil, it is heated by external heating or electric heating to melt the fusion layer 6 and fix the coil.
Moreover, since the fixing layer 3 is made of a thermosetting resin, the fixing layer 3 does not melt and the aggregate insulated wire 1 itself is prevented from being deformed.

The insulated wire 1 according to the invention of claim 3 is
The fusing layer 6 is made of an alcohol-soluble resin, and the fixing layer 3 is made of an alcohol-insoluble resin. Here, the alcohol means a lower alcohol having 1 to 4 carbon atoms such as methanol, ethanol, propanol, butanol, etc. Therefore, as the alcohol-soluble resin, copolymerized polyamide, polyvinyl butyral, etc. are used, and the alcohol insoluble As the resin, polyamide, phenoxy, polyester or the like is used.

The fixing layer 3 and the fusing layer 6 are formed by applying and baking a varnish made of the above resin. The fixing layer 3 has a thickness of 5 to 20 μm and the fusing layer 6 has a thickness of 5 to 5. Two
It is set to about 0 μm.

In such an assembled insulated electric wire 1, when the electric wire 1 is wound around a coil while being coated with alcohol, the fusion layer 6 is wound in a semi-melted state, so that the coil of the coil is wound. Can be fixed. Moreover, since the fixing layer 3 is made of alcohol-insoluble resin, the collective insulated wire 1 itself does not deform while maintaining its shape.

(Example 1) Seven polyester insulation wires having a conductor diameter of 0.1 mm and a finished diameter of 0.13 mm were twisted together,
Polyamide is applied to this and baked to form a fixing layer having a thickness of 10 μm. Further, phenoxy is applied to this fixing layer and baked to form a fusion layer having a thickness of 10 μm, and a finished diameter of 0.4 is obtained.
A 3 mm thick insulated insulated wire according to the invention of claim 1 was prepared. The assembly-insulated wire was wound tightly by 100 turns to form a coil, which was left in a heating furnace at a temperature of 180 ° C. for 10 minutes and then cooled at room temperature. In this coil, the fusion layer was melted and the respective wires were bonded together to be integrated, and no twisting or dislocation of the individual wires of the collective insulated wire was observed.

(Example 2) Seven polyester insulating wires used in Example 1 were twisted together, and a mixture of 7 parts by weight of polyvinyl butyral and 3 parts by weight of stabilized isocyanate was applied to this and baked to obtain a thickness. A fixing layer having a thickness of 10 μm is provided, and phenoxy is applied on the fixing layer and baked to form a layer having a thickness of 10 μm.
By providing a fusion layer of μm, the assembled insulated electric wire according to claim 2 having a finished diameter of 0.43 mm was prepared. This assembly insulated wire is wound by tight winding for 100 turns to form a coil. When this coil is energized and heated until the surface temperature reaches 200 ° C, when energization is stopped at this temperature, only the fusion layer melts and the coil Was tightly integrated. In addition, the twisting and dislocation of the individual wires of the collective insulated wire were not recognized.

(Example 3) Seven polyester insulating wires used in Example 1 were twisted together, and polyamide was applied to this and baked to form a fixing layer having a thickness of 10 µm, and a copolyamide was formed on the fixing layer. Was applied and baked to provide a fusion layer having a thickness of 10 μm, and the assembled insulated electric wire of the invention according to claim 3 having a finished diameter of 0.43 mm was prepared. When this assembly-insulated wire was wound by tight winding for 100 turns to form a coil, it was wound while applying methanol to the surface of the assembly-insulated wire and then dried at 60 ° C. for 30 minutes. Was obtained. In addition, no deformation of each strand was observed.

[0018]

As described above, according to the insulated insulated wire of the present invention, after winding the coil, it is possible to perform a simple operation by simply heating or applying alcohol at the time of winding the coil. The layers are fixed to each other to obtain a strongly integrated coil. Further, the fixing layer is not melted or dissolved even by the heating or the application of alcohol, and the deformation of the strands of wires, such as twisting and twisting, is prevented.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an example of a collective insulated wire of the present invention.

FIG. 2 is a schematic cross-sectional view showing another example of the collective insulated wire of the present invention.

FIG. 3 is a schematic cross-sectional view showing an example of a conventional assembled insulated electric wire.

FIG. 4 is a schematic cross-sectional view showing another example of a conventional insulated insulated wire.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Collected insulated wire, 2 ... Enamel element wire, 3 ... Fixing layer, 6
… Fusion layer

(72) Inventor Takao Tsuboi 9-1 Futaba-cho, Numazu-shi, Shizuoka Fujikura Electric Wire Co., Ltd. Numazu factory (72) Inventor Toshihito Watanabe 9-1 Futaba-cho, Numazu-shi, Shizuoka Fujikura Electric Wire Co., Ltd. Company Numazu Factory

Claims (3)

[Claims] 1. A collective insulated wire comprising a plurality of enameled wires integrated with a fixing layer, wherein a fusion layer is provided on the fixing layer, and the melting point of the resin forming the fusion layer is the resin forming the fixing layer. Collected insulated wire characterized by being lower than the melting point of. 2. A collective insulated wire comprising a plurality of enamel wires integrated with a fixing layer, wherein a fixing layer is provided on the fixing layer, and the fixing layer is made of a thermoplastic resin and the fixing layer is thermoset. Insulated electric wire characterized by being made of a conductive resin. 3. A collective insulated wire comprising a plurality of enamel element wires integrated with a fixing layer, wherein a fixing layer is provided on the fixing layer, the fixing layer is an alcohol-soluble resin, and the fixing layer is alcohol-insoluble. Collective insulated wire made of resin.