JPH012209A - insulated wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an insulated wire with excellent lubricity and wear resistance, and particularly to an insulated wire with sufficient durability when performing a high-speed and severe coil processing process. It is an object of the present invention to provide an insulated wire having abrasion resistance.

(Prior Art) Recently, there has been a demand for smaller electrical equipment with high NQ, and efforts are being made to rationalize and save labor in the manufacturing process to reduce costs.

Under these circumstances, similar rationalization, labor-saving, and miniaturization are being carried out in the process of manufacturing coils for motors, transformers, etc. For example, in the process of manufacturing stators for motors, electric wires are first wound into coils using a high-speed automatic winding device. However, at that time, the 1! If the wire comes into contact with the wire, guide, etc., the electric machine will inevitably be damaged.

In addition, in the next step of inserting into the status slot, the automatic inserter inserts it into the status slot, but
Here, due to contact between the electric machines and the inserter blade and core, damage to the shaft is likely to occur as described above.

As described above, with the increase in the wire winding speed and the improvement in the space factor in the stator slot, problems have arisen in the case of ordinary insulated wires, such as an increase in the defective rate due to rare shots, etc., and a decrease in productivity.

Conventionally, processes such as applying paraffin wax to the surface of the heavy lines have been carried out in an attempt to correct this problem, but this has not been able to fully achieve the purpose.

(Problems to be Solved by the Invention) The present invention is based on the current situation and as a result of intensive research.
We have developed a new electric wire that can significantly reduce the defective rate and improve productivity when automating, speeding up, and improving the performance of the wire coil winding process.

(Means for Solving the Problems) The present invention provides an insulating layer on the conductor, and further provides an insulating layer on the outside of the insulating layer.
It is characterized by providing a lubricating layer made of a mixture of a), a thermoplastic resin (b), and a fluorine-containing resin (c).

In the present invention, for example, paraffin wax, polyethylene wax, natural wax, etc. are used as the wax (a) for forming the lubricating layer. Natural waxes are preferred, especially beeswax, carnauba wax, and montan wax.

The thermoplastic resin (b) is not particularly limited, but it is desirable to have excellent flexibility, heat resistance, and abrasion resistance, such as polyamide resin, epoxy resin, linear polyester resin, etc. preferable.

Further, as the fluorine-containing resin (e), it is desirable that the resin has a high fluorine content and a high melting point. Tetrafluoroethylene (PPTE), 47 Polyfluoroethylene-6
Preferably, heptafluorinated propylene copolymer (FEP).

In the present invention, the blending ratio of (a), (b), and (c) above is not particularly limited, but a/b = 8
The range of 0/20 to 60/40 is preferable, and if a is less than 60 parts, the obtained insulation and wire lubricity will be insufficient. Also, a is 8
If it exceeds 0 parts, the wear resistance of the obtained zetsukiden is poor.

Also, regarding the blending amount of (e), c/a+b = 1/Z
oo to 30/100 is preferable, because if 1/Zoo does not have grooves, the obtained insulation 1111 will lack lubricity and wear resistance, and if it exceeds 30/100, wear resistance will be poor. .

The method for manufacturing the insulated wire of the present invention is to first provide an insulating layer of polyester, polyesterimide, etc. on the conductor, and then apply (a) I (b) on the outside thereof.

The composition (c) is applied and baked.

Therefore, the most important and economical method is to use a paint prepared by dispersing or emulsifying the above composition in water.

(Example) Examples (1-(3), Comparative Examples (1)-(3) As shown in the drawings, a commercially available polyester resin paint was applied and baked to a thickness of 40 μm on a copper wire 1 with a diameter of 1 m. Example 1), polyesterimide paint applied to a thickness of 30μ and baked (Example 2), and polyesterimide paint applied to a thickness of 30μ and polyamide-imide paint applied to a thickness of 10μ and baked (Example 2).
In Example 3), an insulating layer 2 was also formed, and a pigeon 3 having the following composition w(A) was provided thereon to obtain an insulated wire of the present invention.

Note (&) k Carnauba wax emal・
John C Co., Ltd.) 1. fAfJ3 Product name EXN 22
Emulsion with a concentration of 22% made by emulsifying carnauba wax in water using a surfactant (b) Thermoplastic resin 6
．． 6 Nylon ice version (manufactured by Toshi Co., Ltd., product name 5P-500) f Dispersed in water (c) Fluororesin PTFF dispersion (
Product name T-30J manufactured by DuPont Mitsui Fluorochemical Co., Ltd.) The solid content ratio of the above (&), (b), and (e) is 70/
3015 M, i, Ntffc so that it becomes i city,
Further, the mixture was put into a homogenizer together with deionized water and stirred to make it uniform so that the total solid content was 10%.

In addition, in order to compare it with the insulating material of the present invention, it has a melting point of 140? Nono rough in wax CB) 1%
Comparison by applying n-hexane direct solution and drying (1) ~
A comparative insulated wire (3) was obtained.

The performance of the insulated IT wire of the present invention and the insulated wire of the comparative example thus obtained was measured in terms of abrasion resistance and m palm abrasion coefficient. The results are shown in Table 1.

Examples (4) to (9) and Comparative Examples (4) to (8) A polyester imide mulberry (trade name: Isomid, Nippon Schenectady Co., Ltd.) was applied and baked on a steel wire with a diameter of 1.0 m to a thickness of 30 μm. A film is formed, and then a polyamide-imide paint (I (I405, manufactured by Hitachi Chemical Co., Ltd.) is applied and baked to form a loquat film having a thickness of 40μ, and then a lubricant layer shown in Table 2 is applied on top of it. Furnace temperature: 400℃, furnace length: 4m
The coating was coated and baked in a baking furnace at a speed of 121 M/cycle to form a moisturizing layer to obtain Hongen Myoba Enyamori and Bishu example insulating wires.

The friction coefficient and abrasion resistance of the insulated wire of the present invention and the comparative dead wire thus obtained were measured in the same manner as in Example (1). The results are shown in Table 2.

In addition, the numerical value of the composition on the outer surface is the solid content weight ratio.

(Effects) As detailed above, the insulated 8 wire of the present invention has excellent lubricity and wear resistance, so even when coil winding is performed at high speed, no damage is caused to r;, m, etc. It is extremely useful industrially.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of the insulated garment of the present invention, FIGS. 2 and 3 are apparatuses for measuring the coefficient of friction in the insulated wire of the present invention, and FIG. 2 is a plan view. , 3rd
The figure is a side view. 1... Conductor, 2... Insulating bird, 3... Lubricating layer, 4.
5...Insulated wire. Patent attorney representing applicant Takehiko Suzue Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] An insulating layer is provided on the conductor, and the outside thereof is made of (a) wax, (b) thermoplastic resin, (c) fluorocarbon-containing resin, and a/b = 80/20 ~ 60/40, (c)/
An insulated wire characterized in that a lubricating layer is formed with a composition of (a+b)=1/100 to 30/100.