Shenghua's blog

The drag chain cable is a kind of highly flexible special cable that can move back and forth with the drag chain and is not easy to wear.

Drag chain cables are mainly used in: industrial electronic systems, automatic generation lines, storage equipment, robots, fire protection systems, cranes, CNC machine tools and metallurgical industries.

1. Tensile Center

In the center of the cable according to the number of cores and the space where each core crosses as much as possible, there is a real centerline filling (instead of filling with some filler material or garbage cores made of waste plastic as is usually the case). This method can effectively protect the stranded wire structure and prevent the stranded wire from freeing to the central area of the cable.

2. Conductor structure

The cable should choose the most flexible conductor. Generally speaking, the thinner the conductor, the better the flexibility of the cable, but if the conductor is too thin, the phenomenon of cable entanglement will occur. A series of long-term experiments have provided the optimum combination of diameter, length and nodal shielding for a single conductor, which has the best tensile strength.

3. Core wire insulation

Insulation materials within the cable must not stick to each other. And the insulation also needs to support each single strand of wire. Its reliability is therefore only proven in applications where high-pressure-formed PVC or TPE materials can be used in energy chains with millions of meters of cable.

4. Stranded wire

The stranded wire structure must be wound around a stable tensile center with an optimal crossover pitch. However, due to the application of insulating materials, the stranded wire structure should be designed according to the state of motion, starting from 12 core wires, so it should be twisted in bundles.

5. Inner sheath

The armor-style extruded inner sheath replaces the cheap wool material, stuffing or accessory stuffing. This method ensures that the stranded wire structure is not scattered.

6. Shield

The shield is tightly braided outside the inner jacket with an optimized braid angle. The loose braid will reduce the EMC protection ability and the shield will quickly fail due to shield breakage. The tightly braided shield also resists torsion.

7. Outer Sheath

Outer jackets made of different modified materials have different functions, anti-UV, anti-low temperature, oil-resistant and cost-optimized. But all of these outer jackets have one thing in common, high abrasion resistance and won't stick to anything. The outer sheath must be highly flexible but also supportive and should of course be high pressure formed.