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Interpretation of the damage and precautions of shielded cables

Update:2020-10-24
Abstract:

In the manufacturing process of the shielding layer, th […]

In the manufacturing process of the shielding layer, there are many correct or incorrect processes. A very important parameter is the weaving angle of the shielding layer.

In cables used for drag chains, the load on the shielding layer of the outer diameter of the cable must be taken into consideration. An unreasonable weaving angle of the shielding layer will further increase the tension load and cause damage to the shielding layer. As a result, the shielding effect is weakened, and when the sharp cable tail pierces the wool fabric or foil gold material and contacts the core wire, it may even form a short circuit. Here, we recommend you a useful tip: If you strip off the insulating layer, you can easily push the shielding layer back into the sheath, but such a shielding layer cannot be applied to the energy supply system. Highly flexible cable. Of course, igus can provide direct solutions to these problems:

The weaving angle of the shielding layer determined through long-term experiments can effectively offset the tension, so it is very suitable for drag chains.

Due to the stable inner sheath, the shielding layer will not loosen and fail.

In the twisted wire structure, the shielding layer itself has an anti-torsion function.

The sheath is worn or damaged

Any defect in the internal structure is difficult to detect from the outside, but the problem of the sheath can be directly observed with the naked eye. The sheath is the first layer of protection for the precise internal structure of the cable. This is why jackets that are broken, worn, and swelled are very serious quality problems. In order to avoid such problems, igus provides cable sheaths of seven different materials for users to choose according to the working environment of their machinery.

Armor type kneading forming sheath

Manufacturing processes and materials are also important factors in determining product quality. In some so-called cables suitable for drag chains, the sheath is generally tubular, so it is impossible to provide the necessary support for the stranded wire structure during the long-term bending process, so that the stranded wire structure is easy to split.

As the first manufacturer of the drag chain system, igus has developed a armor-type kneading molded sheath.

This kind of sheath can ensure that the core wire will not loosen when the cable is in motion. The reason is that the sheath is kneaded by extremely high pressure, it is like a guiding groove, which has a guiding effect on the movement of the core wire, and at the same time has a supporting effect. So it is very suitable for drag chains.

Summarize the quality assurance of high-flex cables suitable for drag chains: central stress-relief planning; multi-bundle cable structure; armor-type kneaded inner sheath in shielded cables; fully shielded insulation woven mesh; optimized shielding weaving angle ; Jacket kneaded and shaped sheath.

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