JPH0129286B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Background and Objects of the Invention] The present invention relates to a method of manufacturing a flat cable.

FIG. 1 shows a flat cable produced by a conventional manufacturing method. As shown in the figure, a flat cable is manufactured by arranging a plurality of conductors 1 side by side at a predetermined pitch, and then extruding and covering the conductors 1 with an insulator 2 after the arrangement.

The flat cable manufactured by such a manufacturing method has the following drawbacks when the terminals are processed to classify the conductor 1 into a plurality of types. That is, as shown in FIGS. 1 and 2, only the conductor 1a to be identified is cut to a certain length from above the insulator 2 using the cutter 3. The insulator 2 is then stripped from a predetermined location as indicated by the arrow in the figure. In this way, the conductor 1a to be identified is cut with the cutter 3 as described above and is shorter than the other conductors 1, so the type of conductor 1 can be identified by the difference in the length of the conductor 1 at this terminal. However, if there is a large pitch error between the conductors 1, there is a risk of damaging other conductors 1 when cutting the conductor 1a to be identified with the cutter 3. Further, two steps are required: cutting the conductor 1a to be identified with the cutter 3 and stripping the insulator 2.

The present invention has been made in view of the above points,
The object of the present invention is to provide a method for manufacturing a flat cable that allows easy terminal processing.

[Summary of the invention]

That is, the present invention provides a flat cable manufacturing method in which a plurality of conductors are arranged side by side at a predetermined pitch, and after the arrangement, an insulator is extruded and coated on these conductors.
It is characterized by applying a mold release agent or adhesive to the end of the conductor that is desired to be identified among multiple conductors when juxtaposing the conductors. The adhesion strength between the conductor and insulator that you want to identify is smaller than the adhesion strength between the conductor and insulator that you want to identify is smaller than the adhesion strength between the conductor and insulator that is not coated with any other release agent. The adhesion strength is greater than the adhesion strength between a conductor and an insulator to which no other adhesive is applied.

〔Example〕

The present invention will be explained below based on the illustrated embodiments. FIG. 3 shows a flat cable according to one embodiment of the invention. Note that the same parts as in the prior art are designated by reference numerals, and therefore their explanation will be omitted. In this embodiment, when the conductors 1 are arranged side by side, a mold release agent 4 is applied to the end of the conductor 1a to be identified among the plurality of conductors 1, and the conductors 1 are arranged side by side. By doing so, the terminals of the conductor 1a to be identified can be processed by simply stripping the insulator 2, and a method of manufacturing a flat cable in which the terminals are easily processed can be obtained.

That is, when coating 1 is placed side by side at a predetermined pitch, a mold release agent 4 such as silicone is applied onto the ends of the conductors 1a to be identified and the conductors 1a are placed side by side, and after being placed side by side, an insulator 2 is extruded and coated to manufacture a flat cable. When processing the terminal end of the flat cable manufactured in this manner, the insulator 2 may be stripped from a predetermined location as indicated by the arrow in FIG. In this way, the conductor 1a to be identified becomes shorter and easier to identify, as shown in Figure 4, without having to cut the conductor 1a to be identified from above the insulator 2 with a cutter as in the past. become. That is, since the mold release agent 4 is applied to the conductor 1a to be identified, the adhesion strength between the conductor 1a to be identified and the insulator 2 is the same as that of the conductor 1 and the insulator 2 to which no mold release agent 4 is applied. It becomes smaller than the adhesion strength. Therefore, since the tensile force of the conductor 1a to be identified is reduced when the insulator 2 is stripped, the elongation of the conductor 1a to be identified by the stripping is smaller than that of the other conductor 1 not coated with the mold release agent 4. After stripping, the length of the conductor 1a to be identified becomes shorter than the length of the other conductors 1, and the conductor 1a to be identified can be identified. In this way, not only can the terminals be treated by simply stripping the insulator 2, but also damage to the conductor 1 can be prevented since there is no need to cut it with a cutter.

Using a silver-plated annealed copper wire with an outer diameter of 0.18 mm as the conductor 1, apply a silicone mold release agent 4 on the end of the conductor 1a to be identified and place them side by side, and after placing them side by side, extrude an insulator 2 of tetrafluoroethylene resin to cover them. A flat cable was manufactured. From the terminal of this manufactured flat cable as shown by the arrow in Fig.
Insulator 2 was stripped at a distance of 10 mm. As a result, the exposed length of the conductor 1a to be identified remained 10 mm, while the exposed length of the other conductors 1 was 11 mm. Therefore, even if the conductor 1a to be identified is not cut, it is 1 mm shorter than the other conductors 1 and can be identified.

In this embodiment, the mold release agent 4 is applied to the end of the conductor 1a to be identified when manufacturing the flat cable, but the present invention is not limited to this, and an adhesive may be applied. In this case, the adhesion strength between the conductor 1a to be identified and the insulator 2 is greater than the adhesion strength between the conductor 1 and the insulator 2 to which no other adhesive is applied. Therefore, the conductor 1a to be identified
Since the tensile force when stripping the insulator 2 increases, the conductor 1 to be identified by the strip
The elongation of a is larger than the elongation of the conductor 1 to which no other adhesive is applied, and the same effects as in the case described above can be achieved.

〔Effect of the invention〕

As mentioned above, the present invention enables terminal processing by stripping the insulator, eliminating the need to cut the conductor to be identified from above the insulator with a cutter, and providing a method for manufacturing a flat cable that facilitates terminal processing. can be obtained.

[Brief explanation of drawings]

Figure 1 is a perspective view of the end of a flat cable produced by the conventional flat cable manufacturing method, and Figure 2 shows the state of the end of the flat cable after insulation stripping by the conventional flat cable manufacturing method. FIG. 3 is a perspective view of an end of a flat cable according to an embodiment of the flat cable manufacturing method of the present invention, and FIG. 4 is an insulator of an end of a flat cable according to an embodiment of the present invention. FIG. 3 is a perspective view showing the state after stripping. 1: conductor, 1a: conductor to be identified, 2: insulator, 4: mold release agent.

Claims (1)

[Claims] 1. In a flat cable manufacturing method in which a plurality of conductors are arranged side by side at a predetermined pitch and an insulator is extruded and coated on these conductors after the juxtaposition, when the conductors are arranged side by side, the end of the conductor to be identified among the plurality of conductors is A method for manufacturing a flat cable, characterized by applying a release agent or adhesive and arranging the cables in parallel.