JPS59143211A - Method of producing flat cable - 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 The present invention relates to a novel method for manufacturing a flat cable, particularly a flat cable having a longitudinal VC unfused portion.

Conventionally, methods for manufacturing flat cables that have intermittent unfused parts in the length direction include a method in which a flat cable is extruded all at once and then slits are made between each wire core using a jig, and an insulated wire is coated with a high-temperature roll. It was manufactured by a method in which the cores were intermittently fused together.

However, in the case of these conventional manufacturing methods, the manufacturing equipment is complicated, manufacturing control is difficult, and the adhesive strength of the fused portion is limited to a constant value.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a flat cable that eliminates the drawbacks of the prior art described above, allows the adhesive strength and spacing of the fused portions to be freely changed, and is simple to manufacture.

That is, the gist of the present invention is to arrange a plurality of insulated wire cores or jacketed wire cores having protrusions in the length direction in parallel, and to locally heat-seal the contact portions between the protrusions and adjacent wire cores. A method of manufacturing a flat cable is characterized in that:

Next, an embodiment of the method of the present invention will be further explained with reference to accompanying drawings. In FIG. This is to send out the wire core 2' that does not contain any moisture.

The wire cores 2 and 2' sent out are fused together at the roller 1, taken up by a take-up machine 7 (C), and then wound up by a take-up machine 8.

FIG. 2 shows the details of the fusing roller 1, in which the wire cores 2 and 2' are pressed together by the roller l, and the protrusion 3 of the wire core 2 is is melted and fused to the wire core 2'.

In this case, the parts other than the protrusion 3 are not fused, so the fused part 5
A flat cable is manufactured in which non-fused portions 5' and non-fused portions 5' are alternately formed in the length direction.

Figures 3 (a) and (b) show A-A' and B-1 of wire core 2.
3' cross section, string 8 is connected to insulator 1 at a continuous pitch.
1 and jacketed HI O table 111ii
A spiral protrusion is formed on the surface.

In the case of this embodiment, there is one string 8 for forming the protrusion, but the number may be two or more.

By changing the winding pitch of the string 8, the interval in the length direction of the fused portion can be arbitrarily determined.

The protrusion is not limited to the one around which the string 8 is wound, but may be provided in the shape of a bump on the surface of the insulator 11 or the jacket 10 itself.

A hot air nozzle 4b for heat-sealing the wire cores 2 and 2'.

The temperature can be easily controlled by controlling the heater or air volume, and by controlling the temperature arbitrarily,
The welding strength of the welded portion 5 can be freely changed.

The wire cores 2 and 2' are not limited to those with the jacket coating 10, but may be those without the jacket coating 10, and the protrusions may be present on both the wire cores 2 and 2'.

The flat cable of the present invention is 2. It is not limited to the length L. If necessary, a large number of them may be fused in parallel.

In the method of the present invention as described above, since the protrusion is provided on the wire core in advance, welding is easy, and therefore a highly reliable flat cable can be provided.

Furthermore, the welding strength of the welded portion can be freely changed, the manufacturing equipment is simple and economical, and its industrial value is very great.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view of the entire line showing one embodiment of the manufacturing method of the present invention, FIG. 2 is an enlarged explanatory view of a portion of the roller, and FIG.
Figures (A) and (B) are explanatory cross-sectional views taken along line A-A' and line B-B'. ■...Roller, 2...Wire core having a protrusion, 2'
...Wire core without protrusions, 3...Protrusions, 4...
·nozzle. 5...Fused part, 5'...Non-fused part, 6...Delivery machine, 7
...Take-up machine, 8... Winding machine, 9... String, 1o... Conductor, 11... Jacket, 12... Insulator. 1st hard

Claims (1)

[Claims] A flat device characterized by arranging a plurality of insulated wire cores or jacketed wire cores having protrusions in the length direction in parallel, and locally heat-sealing the contact portions between the protrusions and adjacent wire cores. Cable manufacturing method.