JPS60158507A - Self-lubricating 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] [Technical field of invention] The present invention relates to an insulated wire with excellent self-lubricating properties.

[Technical background of the invention and its problems] In recent years, in order to rationalize the manufacturing process of electrical equipment, coil winding work has shifted from conventional manual winding work to high-speed mechanical winding work using automatic winding machines. When using an automatic winding machine, insulated wires are subjected to strong tension and are subject to bending, friction, etc.
``Due to CC winding, the insulating layer is easily damaged (J).
This has led to problems such as an increase in equipment failure due to ground failures, etc.

In addition, when forming a coil, it is effective to reduce the space factor as much as possible for the overall economic efficiency and ease of use of the device, and for this reason, it is necessary to apply tension to the insulated wire and wind it tightly1. For these reasons, there has been a demand for the development of self-lubricating insulated wires that are self-winding and capable of reducing the coil-forming space factor, and attempts have been made recently.

Conventionally, liquid lubricants such as liquid paraffin were applied to insulated wires to reduce wear and tear during machining, but the lubricity and slipperiness were insufficient, making it difficult to handle the wires manually. Moreover, when winding, there is a drawback that the winding property of transformers, coils, etc. is poor. On the other hand, there is a method of applying a solid lubricant such as solid paraffin, which has better lubricity than liquid lubricant, but since it uses a solvent, safety and health issues may be affected.
Also, it is preferable to use polyamide resin (6-nylon, 66-lead), which has a small coefficient of friction, for the insulation layer -1- of the insulated wire. There is a method of applying and baking coating M'+1 (e.g. 1), but in the wire manufacturing process, the coating equipment is complicated because it is coated on the conventional insulated wire 1, which reduces production efficiency. There are disadvantages such as a decrease in iI/
15'12CJ Besa-1)'s calendar could not be expected.

[Objective of the Invention 1 The object of the present invention is to solve the conventional drawbacks described in 1-1, and to provide an insulated wire having self-lubricating properties with excellent friction and wear characteristics. There is a temperature.

[Summary of the Invention] The present invention has found that the above objects can be achieved by using a lubricant that uses liquid paraffin and natural waxes in a predetermined ratio. It is something that

That is, the present invention provides a self-lubricating insulated wire in which a lubricant is applied directly or through an insulator on a conductor and then baked, using liquid paraffin of 10 to 90%
This is a self-lubricating 1/1 insulated wire characterized by using a lubricant consisting of 90 to 10 Ii weight percent of natural waxes.

The liquid paraffin used in the present invention includes all commonly used paraffins.

The natural waxes used in the present invention include vegetable carnauba wax, auriculie wax, candelilla wax, sugar, hon[=1], rice wax, and the like. Animal-based products include 1 chair [resi, spermaceti wax, cicada insect wax, hiratsuclaw, lanolin, etc. Further, examples of minerals include montan wax and osikerite. These can be used alone or as a mixture of two or more. Especially natural waxes,
They are effective in imparting slipperiness to insulated wires, and carnauba wax, beeswax, shellac, and the like are particularly preferred.

The lubricant used in the present invention is composed of liquid paraffin and natural waxes. It is necessary that 'C. Liquid paraffin is 10Φ amount% not thk
In this case, the lubricant has poor dispersibility and cannot be applied uniformly to the surface of the insulated wire, resulting in poor appearance. Moreover, if it exceeds 90% of heavy stitching, the slip fl will deteriorate, which is not preferable.

The lubricant used in the present invention is solid at room temperature and has a temperature higher than the melting point of natural waxes, preferably 80° (: ~1!
) It is heated to 0°C, applied in a liquid state onto a conductor via an insulating film, and baked to produce a self-lubricating insulated wire. This insulated wire has a small coefficient of static friction, which is a measure of slipperiness, and has a large number of reciprocating wears, and is excellent in self-ITh'l slipping properties.

[Examples of the Invention] The present invention will be explained in more detail by Examples below, but the present invention is not limited thereto.

Example 1-4 5- Raw material 1 having the composition shown in Table 1 was heated and mixed at 120° C. for 1 hour, and then cooled to room temperature to obtain a solid lubricant.

These lubricants are heated to 80 to 150°C to form a conductor having a polyester insulation film with a diameter of 1. A self-lubricating insulated wire having a self-lubricating bamboo coating thickness of 0.001 ml was obtained by coating and baking on a round steel wire of 0.0 mm in diameter. For each of these electric wires, the static friction coefficient, -h friction coefficient, and the number of reciprocating wear were measured and are shown in Table 1.

Comparative Example 1 Liquid paraffin was applied to a round steel wire with a conductor diameter of 1.0 mm on which a polyester insulation film was applied, and the self-lubricating bamboo film thickness was 0.
．． A self-lubricating insulated wire having a diameter of 0.001 mm was obtained. The same measurements as in the examples were carried out on this electric wire, so the 3° comparison shown in Table 1 was carried out. An insulating paint with a C solid content of 16% was obtained. This paint was applied and baked onto a round steel wire having a conductor diameter of 1 mm and 0 ml, which had a polyester insulating film, to obtain a 6-self-lubricating insulated wire with a self-lubricating bamboo film having a thickness of 0.001 ml. The obtained wires were subjected to characteristic tests similar to those in the Examples, and are shown in Table 1.

7-1 Table 8- [Effects of the invention] Self-it\! of the present invention! The lubricant insulated wire uses a lubricant made of liquid paraffin and natural waxes, so it has a small coefficient of static friction, is resistant to abrasion, and does not deteriorate the insulation coating properties. By using this insulated wire, it is possible to manufacture a tight coil with excellent automatic winding properties and a small space factor.

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Claims (1)

[Scope of Claims] 1. A self-lubricating insulated wire obtained by applying a lubricant directly or through another insulator to a conductor and baking it, containing 10 to 90% by weight of liquid paraffin and natural waxes9.
A self-lubricating insulated wire characterized by using a lubricant comprising 0 to 10% by weight. 2. The self-lubricating insulated wire according to claim 1, wherein the natural wax is one or a mixture of two or more of carnauba wax, beeswax, and shellac.