A processing technology and processing system for longitudinal wrapping of flame-retardant cables

Abstract

The invention discloses a flame-retardant cable longitudinal wrapping processing technology and processing system. The processing technology comprises steps of selection of a cable core, making of a flame-retardant grid wrapping tape, longitudinal wrapping of the flame-retardant grid wrapping tape on the cable core and extrusion of an outer sheath. The processing system comprises a pay-out stand,a guiding mechanism, a processing mechanism, a longitudinal wrapping mechanism, a winding machine, a tractor, a winder and an extruder. The cable wire passes through the guiding mechanism, passes across the processing mechanism and passes through the longitudinal wrapping mechanism, the processing mechanism processes the grid wrapping tape into the flame-retardant grid wrapping tape, and the flame-retardant grid wrapping tape is longitudinally wrapped on the cable core through the longitudinal wrapping mechanism. On the premise of ensuring the same flame-retardant performance, the occurrence probability of flaws such as differentiation or loss of a flame-retardant layer can be reduced, the diameter of the cable is reduced, a flame-retardant cable with a more stable structure and a smallercable diameter can be produced, and the space needed for installation and the transportation difficulty are further reduced; and besides, the method is simple, the use is convenient, the device is simple, the cost is low, and the practicability is strong.

Description

technical field [0001] The invention relates to the technical field of fire-proof and flame-retardant cable processing, in particular to a flame-retardant cable longitudinal wrapping process and processing system. Background technique [0002] At present, the production process of wrapping cables is mostly that the cable core on the pay-off frame rotates along the axis under the traction of the rotating tractor, and the rotating cable core passes through the wrapping machine and is wrapped into a semi-finished product, and then sent to the downstream extrusion equipment for sheathing extrusion. In this production process, the process of extruding fire-resistant and flame-retardant mud to form a flame-retardant layer is often used to make fire-resistant cables and flame-retardant cables. Halogen-free flame retardant and other characteristics, but this process method lacks many disadvantages such as uneven thickness of fire retardant mud layer and difficult control of extrusi...

AI Technical Summary

Problems solved by technology

In this production process, the process of extruding fire-resistant and flame-retardant mud to form a flame-retardant layer is often used to make fire-resistant cables and flame-retardant cables. Halogen-free flame retardant and other characteristics, but this process method lacks many disadvantages such as uneven thickness of fire retardant mud layer and difficult control of extrusion process, and because fire retardant mud cannot be plasticized, it is easy to deform in the subsequent process Problem, therefore, when extruding the flame retardant layer, it is generally necessary to use the extruded skeleton to support the flame retardant mud. Not only the procedure is cumbersome, but also the structure of the manufactured flame retardant layer is not stable, so that the finished cable flame retardant mud is installed and constructed. In the process, it is easy to powder, which will cause the problem of partial loss of the fire-proof and flame-retardant mud layer, which will affect the overall fire-proof and flame-retardant effect of the cable, and even make it difficult to pass the fire-resistant and flame-retardant tests.

Images