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There are many correct or incorrect processes in the manufacturing process of the shielding layer. One important parameter is the weaving angle of the shielding layer.
In cables used for towing chains, the load on the shielding layer of the cable's outer diameter must be taken into account. The unreasonable shielding layer weaving angle will further increase the tension load, resulting in the damage of the shielding layer. This will cause the shielding effect to weaken, when the sharp cable tail pierced wool fabric or gold foil material contact to the core wire, even can cause short-circuit. Here, we recommend you a useful tip: if you peel off the insulating layer, you can easily push the shield back into the sheath, but such shielding layer can not be used in the energy supply system, moving high flexible cable. Of course, Igus can provide direct solutions to these problems:
The shielding layer weaving angle determined by the long-term experiment can effectively counteract the tension, so it is suitable for the tow chain.
Due to the stability of the inner sheath, the shielding layer will not be slack failure.
In the Strand structure, the shielding layer itself has torsion resistance.
Wear or tear of sheath
Defects in any internal structure are difficult to detect externally, but the problem of sheath can be directly observed by the naked eye. Sheath is the first layer of cable precision internal structure protection. This is why rupture, wear and swelling of the sheath is a very serious quality problem. In order to avoid such problems, Igus provides seven different materials for the cable sheath for users to choose according to the corresponding working environment of their machinery.
Armor Type Extrusion forming sheath
Manufacturing processes and materials are also important factors in determining product quality. In some so-called towing chain cables, the sheath is usually tubular, so it is not possible to provide the necessary support for the strand structure during the long bending process, thus making the strand structure easy to split.
Igus as the first manufacturer of the towing chain system, and developed a armour-shaped extrusion sheath.
This sheath ensures that when the cable is in motion, its core cable will not loosen. The reason is that the sheath is through a particularly large pressure extrusion, it is like a guide groove, the core line of the movement played a guiding role, but also played a supporting role. Thus very suitable for towing chains.
Summarize the quality assurance of high flexible cable for towing chain: Center stress design, multi-beam cable structure, armor-shaped inner sheath used in Shield cable, fully shielded insulated woven mesh, optimized shielding knitting angle, armor-shaped extrusion sheath.