Drag Chain Cable, also known as flexible or moving cable, is named based on its application environment, distinguishing it from commonly named cables such as control cables, data cables, and servo cables in engineering applications.

The term "drag chain" refers to a chain that can protect cables and allow them to move back and forth by placing them inside the chain. It is a highly flexible cable that can withstand repeated bending and movement without wearing out easily. It is also referred to as trailing cable, towline cable, or tank chain cable.

Composition Structure of Drag Chain Cable:

1. Tensile Center:

   • Fill the center of the cable with a real center line based on the number of core wires and the space at the intersection of each core wire, rather than using fillers or waste plastic-made core wires. This method effectively protects the twisted wire structure from straying to the central area of the cable.

2. Conductor Structure:

   • Choose the most flexible conductor for the cable. Generally, a finer conductor results in better flexibility, but excessively fine conductors may lead to cable entanglement. Long-term experiments determine the optimal diameter, length, and shielding combination for a single conductor, providing the best tensile strength.

3. Core Wire Insulation:

   • The insulation material inside the cable should not stick together, and the insulation layer needs to support each individual wire. High-pressure molded PVC, PE, TPE materials are suitable for drag chains, providing reliability over millions of meters of cable applications.

4. Twisted Wire:

   • The twisted wire structure must be wound around a stable tensile center with the optimal twist pitch. The twisted wire structure should be designed according to the motion state, starting from 12 core wires, and a bundle twisting method is recommended.

5. Inner Sheath:

   • A pressed armor-type inner sheath replaces inexpensive wool materials or fillers. This method ensures the twisted wire structure remains intact.

6. Shielding:

   • The shielding layer is tightly woven around the inner sheath at an optimized braiding angle. Loose braiding reduces electromagnetic compatibility (EMC) protection, and the shielding layer quickly fails due to braiding breakage. The tightly woven shielding layer also provides anti-torsion properties.

7. Outer Sheath:

   • The outer sheath, made of different improved materials, serves various functions such as UV resistance, low-temperature resistance, oil resistance, and cost optimization. However, all outer sheaths share the common characteristic of high abrasion resistance and non-adherence. The outer sheath must be highly flexible while providing support and should be high-pressure molded.

Key Characteristics of Drag Chain Cable:

Drag chain cables exhibit excellent flexibility and are resistant to bending, folding, wear, and oil. They are suitable for continuous reciprocating movement, especially in industrial environments with frequent bending requirements.