JPS6132912A - 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 [Industrial Application Field 1] The present invention relates to a method for manufacturing a flat cable in which a required number of conductors are arranged at intervals, and in particular a method for manufacturing a flat cable with high accuracy in the conductor spacing and cable dimensions. It is about the method.

[Prior Art] As an example of a conventional flat cable manufacturing method, an N-ru There was a method of forming the sheathing material into a circular or square shape using heat and pressure, and then thermally fusing adjacent sheathed wires to integrate them. (For example, Japanese Patent Publication No. 57-21089) [Problems to be Solved by the Invention] However, in this conventional manufacturing method, it is necessary to supply sufficient, stable and efficient heat to the forming roll, so This has the disadvantage that the structure is complicated and the roll is easily deformed by heat.

As a result, the roundness and precision of the forming roll, which has a substantially similar relationship to the finished shape of the cable, deteriorates, making it difficult to obtain a cable with high dimensional accuracy.

[Means for Solving the Problems] An object of the present invention is to provide a method for manufacturing a flat cable that can eliminate the drawbacks of the prior art described above and improve the spacing accuracy between conductors and the dimensional accuracy of the cable. It's about doing.

That is, the gist of the present invention is to continuously supply and heat a required number of covered wires coated with a thermoplastic resin to a heating device, and to further heat the coated wires,
By supplying the wire to a pair of opposing forming rolls having grooves with the required pitch and shape, the heat of the covered electric wire and the pressure of the forming rolls are used to form the covering material while forming adjacent parts. A method of manufacturing a flat cable characterized by integrally heat-sealing covered electric wires.

[Function] The present invention separates the heating process for the coated wire and the forming process, thereby eliminating thermal deformation of the forming roll and improving dimensional accuracy, thereby improving the dimensional accuracy of the flat cable. .

[Example] Next, an example of the manufacturing method of the present invention will be further described with reference to the accompanying drawings.

Reference numeral 4 denotes coated electric wires, and a required number of wires are arranged in parallel and fed out from a feeding device (not shown) to the heating device @1.

The heating device 1 uses a heating roll 1 that incorporates three opposing heat sources, and grooves 6 for guiding the covered electric wire are provided on the 9 surfaces of the heating roll.

The coated wire is heated while passing through the three rolls 1, and the heated coated wire is further supplied to the opposing forming rolls 2.3.

The forming roll 2.3 has a groove 7 formed into a predetermined shape with high precision, and when the heated electric wire passes through the groove 7, it is heated and formed into a predetermined shape.
It is.

Since the forming roll 2.3 has a structure without a heat source, there is no thermal deformation and the molding roll 2.3 cures with excellent dimensional accuracy, so that the completed flat cable also has excellent dimensional accuracy.

Here, the grooves 6 provided in the heating roll 1 are for guiding the insulated wire 4, and have no shaping effect at all.

This groove 6 may be omitted if unnecessary.

The groove shape provided on the forming roll 2.3 may have a shape depending on the purpose, and may have the same shape as the roll 2.3, or may have a different diameter shape.

In addition, the heating device is not limited to the one using three heating rolls, but also the method of heating the covered wire by applying hot air with a blower, etc., or heating the covered wire by passing it through a housing in a high humidity atmosphere. Any method or the like may be used, and the present invention is not to be construed as being limited by this example.

[Effects of the invention] As explained above, the present invention separates the process of applying heat to the covered electric wire and the process of molding the Wi electric wire and heat-sealing adjacent electric wires to each other. As a result, the dimensional accuracy of the flat cable is improved, and its industrial value is very great.

[Brief explanation of the drawing]

The accompanying drawing is a perspective view showing an embodiment of the method for manufacturing a flat cable of the present invention. 1: Heating roll 2, 3: Forming roll 4: Coated electrode 1
! 3 5: Flat cable 6: Guide groove
7: Groove for fc type

Claims (1)

[Claims] (1) Continuously supply and heat the required number of insulated wires coated with thermoplastic resin to a heating device, and then apply grooves to the heated insulated wires with the required pitch and shape. By supplying the heat to a pair of opposing forming rolls that do not have a heat source, the heat of the covered wire and the pressure of the forming roll can be used to form the covering material and thermally fuse and integrate adjacent covered wires. Characteristic flat cable manufacturing method.