JPS59201316A - 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 method for manufacturing a flat cable, and more particularly to a method for manufacturing a flat cable by heat-sealing a plurality of parallel insulated wires.

Methods for manufacturing flat cables include coating, bulk extrusion, and hot rolling. Among these methods, the paint method involves pouring a paint such as vinyl chloride or polyurethane between multiple insulated wires arranged in parallel, and then heating and drying it to bond the insulators of the insulated wires. The method involves continuously extruding multiple conductors arranged in parallel at a predetermined interval while simultaneously covering them with an insulator.The method using hot rolls involves placing heating wires between the parallel insulated wires. , the side surfaces of the insulators of adjacent insulated wires are heat-sealed to bond and integrate the insulators.

However, in both of these methods, multiple insulated wires arranged in parallel are fused and manufactured at the same time, so the tearability between each insulated wire lacks stability, and when the thickness of the insulator is small, each insulated wire It had the disadvantage that the conductor or shield was exposed when it was torn off. Furthermore, in the case of the paint method, since the above-mentioned paint such as vinyl chloride or polyurethane is applied onto the insulated wire, there is a drawback that the coated area becomes discolored and the appearance deteriorates significantly.

The present invention was made in view of the above points, and includes tearability,
The object of the present invention is to provide a method for manufacturing a flat cable with good appearance.

That is, in the present invention, two insulated wires in the center of parallel insulated wires are fused together, and then the insulated wires are fused one by one toward both sides of the fused insulated wires. The insulated wire to be bonded is guided by a grooved roll held by a spring so that its width direction follows the width dimension of the insulated wire to be fused.

The present invention will be explained below based on the illustrated embodiments. An embodiment of the present invention is shown in FIGS. 1-3.

In this embodiment, two insulated wires 1a at the center of the parallel insulated wires are fused together, and then the fused insulated wires 1a are fused one by one toward both sides. The insulated wires 1a, lb, lc to be fused are held by grooved rolls 3a, 3b, which are held by springs 2 so that the width direction of the insulated wires 1a, lb, lc follow the width dimensions of the insulated wires 1a, lb, lc to be fused.
I made it possible for my husband to guide me in 3c. By doing this, a plurality of parallel insulated wires are bonded sequentially from the center to suit the width dimensions of the insulated wires 1a, le, and lc to be fused, which improves tear resistance and appearance. A good method for manufacturing a flat cable can be obtained.

That is, among the plurality of parallel insulated wires sent out from the insulated wire sending device 4, the central two insulated wires 1a are guided to the grooved roll 3a via the guide roll 5, and the grooved roll 3a is The heated fluid is sprayed from the fluid spray nozzle 6 to fuse the parts.

Next, the grooved rolls 3 on both sides of the fused insulated wire 1a are
Each insulated wire 1b to be fused is guided onto b via a guide roll 5, and the guided insulated wire 1b is fused to both sides of the fused insulated wire 1a by a fluid spray nozzle 6. . Further, one insulated wire 1c to be fused is guided onto the grooved rolls 3C on both sides of the fused insulated wires 1a and lb via guide rolls 5, and the insulated wires 1c are fused. A flat cable is manufactured by repeating such operations in order and fusing a plurality of parallel insulated wires. When fusing with the fluid spray nozzle 6, the width dimensions of the insulated wires 1a, lb, Grooved rolls 3a, 3b held by springs 2 that follow the width dimension of lc,
Since the insulated wire 1a to be fused is guided to 3c and fused,
It is now possible to fuse the wire to a thickness that is suitable for the width dimensions of lb and lc, resulting in stable tearability and preventing the conductor or shield from being exposed as in the past when an insulated wire is torn. be able to. In addition, since the heated fluid locally heats and fuses the insulation of the insulated wire, the insulation does not discolor and the appearance can be finished neatly.

In this embodiment, the springs 2 are used to hold the grooved rolls 3a, 3b, and 3c, but the present invention is not limited to this, and an air cylinder or the like may be used.
For spraying, a fluid whose temperature can be controlled and which can melt the insulator, such as a laser beam or high frequency, is used.

As mentioned above, in the present invention, the heat fusion is performed one by one from the center outwards in a way that adapts to the width dimension of the insulated wires, making it possible to perform fusion that adapts to the width dimension. As a result, tearability and appearance are improved, and a method for manufacturing a flat cable with good tearability and appearance can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the flat cable manufacturing method of the present invention, FIG. 2 is a cross-sectional view showing the insulated wire of the embodiment guided to a grooved roll, and FIG. 3 is the same. FIG. 2 is a sectional view showing a state in which an insulated wire according to an embodiment is guided to a grooved roll. 1a... Two insulated wires in the center, Ib, le
...Insulated wire to be fused, 2...Spring,
3a, 3b, 3c...grooved roll, 4...
...Sending device, 5...Guide roll, 6...
...Fluid spray nozzle. 6-

Claims (1)

[Claims] 1. A method for manufacturing a flat cable by heat-sealing a plurality of parallel insulated wires to each other, in which the two insulated wires at the center of the parallel insulated wires are fused together, and then the fused insulation As the wires are fused one by one toward both sides, the insulated wires to be fused are held by a spring so that the width direction thereof follows the width dimension of the insulated wires to be fused. A method for manufacturing a flat cable, characterized in that the flat cable is guided by a grooved roll.