JPH02152107A - Cable and manufacture thereof - Google Patents

Abstract

PURPOSE:To enable easy processing for a cable end by applying the constitotion wherein an insulation material contracts by the predetermined amount due to the application of the predetermined temperature of heat during cable end processing and then a cable is cooled after heated and drawn in such a way as to add an end processing function for exposing a conductor at the cable end. CONSTITUTION:A cable 3 having an insulation material 2 for covering a conductor 1 is heated and drawn so that the insulation material 2 will contract by the predetermined amount and the conductor 1 at the end of the cable 3 will be exposed for the addition of an end processing function due to the application of the predetermined temperature of heat during cable end processing. Then, the cable 3 is cooled. This cable 3 is heated at the predetermined tempera ture, drawn and then cooled, so that the insulation material 2 will contract during the applica tion of heat at the predetermined temperature for the end processing of the cable 3 and the conductor 1 will be exposed for the addition of an end processing function. According to the aforesaid construction, the insulation material 2 contracts during heating the cable 3 at the predetermined temperature for processing the end thereof and the conductor 1 at the cable end is ex-posed. Consequently, it is possible to obtain a cable allowing for the substantial reduction of an end processing work and to obtain the manufacture method for the cable.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electric wire and a method for manufacturing the same.

[Conventional technology 1] The general terminal processing method is to strip the insulator and jacket with a wire stripper, or to pressure-bond the insulator all at once without stripping, but both methods are suitable for thin wires, especially thin conductors with a size of 26 AWG or less. It was difficult to apply this method to the industry, and in particular, the terminal processing of multi-core cables required a great deal of effort.

[Problems to be Solved by the Invention] The above-mentioned prior art has the following problems in the case of multi-core thin wires.

(1) Breakage or damage to the conductor wire (fine wires, poor alignment of the stripping blade, movement of the conductor, etc.).

(2) Poor or impossible pressure contact (too thin to produce pressure contact, insulator remaining as a thin film).

(3) Increase in processing man-hours.

(4) Decrease in work yield.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an electric wire and a method for manufacturing the same that make it possible to significantly reduce terminal processing work.

[Means for solving the problem 1 The above purpose is to heat the electric wire to a predetermined temperature during terminal processing so that the insulator shrinks by a predetermined amount and the terminal conductor is exposed. By stretching and cooling the wire, the wire is heated to a predetermined temperature, stretched, and then cooled, so that when the wire is heated to a predetermined temperature during terminal treatment, the insulator shrinks by a predetermined amount, and the conductor at the terminal This is achieved by adding a terminal processing function that exposes

[Function] The electric wire was heated and stretched so that the insulator was heated to a predetermined temperature during terminal treatment, thereby shrinking the insulator by a predetermined amount, thereby adding a terminal treatment function in which the conductor at the terminal was exposed, and then cooled.

Then, the wire is heated to a predetermined temperature, stretched, and then cooled to give the wire an end treatment function in which when the wire is heated to a predetermined temperature, the insulator shrinks by a predetermined amount, exposing the conductor at the end. Therefore, the insulator of the electric wire shrinks due to heating during terminal processing, and the conductor at the terminal becomes exposed, making terminal processing easier, and an electric wire and its manufacturing method that greatly reduces the terminal processing work can be obtained.

[Example] The present invention will be described below based on the illustrated example. An embodiment of the present invention is shown in FIGS. 1 and 2. FIG.

An electric wire 3 (see FIG. 1(a)) comprising a conductor 1 and an insulator 2 coated on the conductor 1 is heated to a predetermined temperature during terminal treatment so that the insulator 2 contracts by a predetermined amount, Terminal conductor 1
is exposed (see Figure 1 (C)).The end treatment function is added by heating and stretching, and then cooling (see Figure 1 (B)).
. Then, the electric wire 3 is heated to a predetermined temperature, stretched, and then cooled (see Fig. 2). 1
(See Figure 1 (C)). By doing this, when the electric wire 3 is heated to a predetermined temperature during terminal processing, the insulator 2 contracts and the terminal conductor 1 is exposed, making it possible to significantly reduce the terminal processing work. An electric wire 3 and a method for manufacturing the same can be obtained.

That is, as shown in FIG.
(see Figure 1(a)) for 1 minute (see Figure 1(b)). Normally, when copper is used for conductor 1, the elongation is 10 to 30%.
Yes, and below the crystallization temperature of the insulator 2 together with the insulator 2, for example, 90 to 120 °C for cross-linked PE, 150 to 150 °C for ETFE.
The strain is set by stretching 5 to 20% at about 180°C and rapidly cooling. When the terminal end of this electric wire 3 is treated at the above-mentioned drawing temperature, only the insulator 2 contracts due to the drawing force, and the conductor 1 is exposed (see FIG. 1(C)). This produces the same effect as peeling off the terminal insulator 2.

As shown in FIG. 2, the manufacturing method is to heat and stretch the electric wire 3 through the delivery bobbin 4, the delivery speed regulator 5, the constant temperature bath 6, and the cooling tank 7, and then rapidly cool it. It is wound up on the winding side hobbin 9 via the winding side hobbin 9. In this case, by setting the speeds A and B of the delivery-side speed regulator 5 and the winding-side speed regulator 8 to A<B, a predetermined strain (B-A) can be easily obtained. Of course, it is also possible to apply strain only by adjusting the take-up tension of B only.

As described above, according to this embodiment, the following effects can be achieved.

(1) Terminal treatment is simple and requires only heat treatment.

(2) The contraction gate can be stabilized, which is of great industrial merit.

(3) This manufacturing method can be applied to most insulated wires.

(4) This is particularly effective because the terminal processing of multi-core cables can be done all at once.

(5) There is no need to damage the conductor during terminal processing, which is also effective in terms of quality assurance.

Note that this embodiment can be applied not only to insulators but also to jackets, sheaths, etc.

Moreover, by making it into a cable, this effect becomes greater.

Furthermore, by converting wires with different strains into cables, it becomes possible to classify the wires (alternative color).

[Effects of the Invention] As described above, the present invention heats and stretches an electric wire so that the insulator shrinks by a predetermined amount by heating to a predetermined temperature during terminal processing, and a terminal processing function is added in which the conductor at the terminal is exposed. Cooled. Then, the wire is heated to a predetermined temperature and stretched, then cooled.
We have added an end treatment function to the wire, which causes the insulator to shrink by a predetermined amount when the wire is heated to a predetermined temperature during end treatment, exposing the conductor at the end. It shrinks and the terminal conductor becomes exposed.
It is possible to obtain an electric wire and a method for manufacturing the same, which facilitate terminal processing and greatly reduce the terminal processing work.

[Brief explanation of the drawing]

FIGS. 1(a), (b), and (c) show states in which the terminal processing function is added to an embodiment of the electric wire of the present invention.
al is a side view of the original electric wire, (bl is a side view showing the electric wire shown in (al) heated and stretched, cooled and fixed, (C) is a side view of the electric wire shown in (b) insulated by heating during terminal treatment. A side view showing a state in which the body is contracted and the conductor is exposed, and FIG. 2 is an explanatory view showing a manufacturing line according to an embodiment of the method for manufacturing an electric wire of the present invention. 1: Conductor, 2: Insulator, 3 :Electrical wire.

Claims (1)

[Scope of Claims] 1. An electric wire comprising a conductor and an insulator coated on the conductor, wherein the electric wire is heated to a predetermined temperature during terminal treatment so that the insulator contracts by a predetermined amount; An electric wire characterized in that it is heated and stretched so as to have a terminal processing function that exposes a conductor at the terminal, and is then cooled. 2. In a method for manufacturing an electric wire comprising a conductor and an insulator coated on the conductor, the electric wire is heated at a predetermined temperature and stretched, then cooled, and the electric wire is subjected to terminal treatment of the electric wire. 1. A method for manufacturing an electric wire, characterized in that a terminal processing function is added in which the insulator contracts by a predetermined amount when heated to a predetermined temperature to expose a conductor at the terminal.