Method for removing coated material of flat cable

Abstract

The present invention provides a method capable of efficiently removing a desired area of an insulating film of a coated strip conductor and capable of removing a coated material of a flat cable which is well electrically connected with other conductors. A surface at one side of a strip conductor (2) group which is arranged in parallel in the flat cable (1) is coated by an insulating film (3) through an adhesive layer (5), and a surface at the other side of the strip conductor (2) group is coated by an insulating film (4) through an adhesive layer (6). In order to enable the strip conductor (2) of the flat cable (1) to expose at the desired area, first, for a surface at one side of the flat cable (1), laser is radiated to the insulating film (3) within the area, while for a surface at the other side of the flat cable (1), gases such as the air (A) and so on are ejected to the insulating film (4) within the area for performing cooling, then, for the surface at the other side of the flat cable (1), laser is radiated to the insulating film (4) within the area, therefore, the insulating films (3, 4) and the adhesive layers (5) can be removed partly, so as to expose the strip conductor (2).

Description

technical field [0001] The present invention relates to a method of removing a coating material of a flat cable called a flat cable, and more particularly, to a processing method for removing a coating material of a flat cable to expose a strip conductor. Background technique [0002] A flat cable (Flat Cable) is a strip-shaped body in which a plurality of strip-shaped conductors arranged in parallel are sandwiched by a pair of insulating films (covering materials) through an adhesive layer, laminated and integrally formed. When connecting the flat cable to the circuit, the ribbon conductor of the flat cable is generally laminated with the connecting conductor conducting with the circuit, and the two conductors are electrically and mechanically connected by welding (spot welding, etc.). connect. [0003] For example, in a rotary connector incorporated into a steering device of an automobile and used as an electrical connection device such as an airbag system, a flat cable i...

AI Technical Summary

Problems solved by technology

Therefore, the cutting operation is complicated, and it is difficult to shorten the processing time required to remove the covering material.

[0009] On the other hand, in the case of a general coating material removal method of sequentially irradiating laser light on one surface and the other surface of a flat cable to remove the insulating film, when the laser light is irradiated on one surface When the insulating film on the other side layered on the strip conductor is softened by the heat, it is easy to deform into a wrinkled shape, and the insulating film on the other side surface that becomes wrinkled is difficult to make the focal point of the laser light and the surface. There is a problem that it is difficult to cleanly remove the insulating film due to the alignment of wrinkled unevenness

In addition, if the power of the laser beam irradiated on one side is reduced, the insulating film on the other side is less likely to become wrinkled, but if this is the case, the laser irradiation time becomes longer and the processing efficiency deteriorates. In addition, a large amount of residues formed by carbonized products of the adhesive layer adhere to the strip conductor, so if it is connected to other conductors, the electrical connection will deteriorate due to these residues, and the reliability will be reduced, so it is not ideal.

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