The towline uses and characteristics suitable for use in the reciprocating motion of the occasion, to play a role of traction and protection in the built-in cable, tubing, trachea, plumbing, towline each section can be opened for easy installation and maintenance. Exercise, low noise, wear-resistant, high-speed movement. Towline has been widely used in CNC machine tools, electronic equipment, stone machinery, glass machinery, doors and windows machinery, injection molding machine, robot, lifting and transport equipment, automated warehouses. Plastic towline in accordance with the classification of plastic towline structure can be divided into i bridge plastic the towline with full closed plastic towline; divided into small towline, the general type the towline and large towline in accordance with the model, the noise figure can be divided into ordinary the towline and mute towline; can be divided in accordance with the form of ordinary towline, parallel the towline, S towline; raw materials into the original package plastic and recycled plastic. Plastic the towline structure (1) the towline shape like tanks chain unit link, the link between rotating freely. (2) of the same series towline inner, outer same pitch towline inner width, the bend radius R can have a different choice. (3) unit chain around the chain plate and the upper and lower cover, towline each section can be opened, easy assembly and disassembly without threading, open the cover to cable, tubing, trachea, water pipes into the towline . (4) other shim chain space separated as needed. Plastic towline basic parameters (1) material: reinforced nylon, with high pressure and tensile load, good toughness, high elasticity and abrasion resistance, flame retardant, high and low temperature performance is stable, can be used in outdoor, nylon content determines how much the the towline use of strength and wear resistance as well as the size of the noise up and running. The nylon content ranging from 5% to 17%, but ultra However 19%. (2) resistance to: oil, salt, and acid, alkali capacity. (3) The operating speed and acceleration (specific speed, acceleration depending on operating conditions may be). (4) operating life. The bridge mute towline resistance to oil, salt and acid, alkali capacity. Materials, reinforced nylon, having a high pressure and tensile load, good toughness, high elastic abrasion retardant. High and low temperature stable performance, can be used in outdoor. Same series towline high, outside the same, pitch, high towline, the bend radius R can have a different choice. Engineering towline can greatly improve the distribution of machine tools, machinery and equipment, wires, cables, liquid, gas hose messy situation, so neatly arranged regularly together, can enhance the overall artistic design effect of machine tools, machinery and equipment. Engineering towline design open and closed. Is the heat treated cotter fixed hardened durable aluminum support frame, for the trachea or cable set stringing holes, solve the disconnection of the cable, the problem of deformation. High-speed silent towline PV66 nylon, as far as possible to extend the service life and load capacity, another mute towline connection structure hook fonts appear sturdy while reducing noise.