A flame-retardant cable wrapping processing technology and processing system

Abstract

The invention discloses a wrapping processing technology and system for a flame-retardant cable. The processing technology comprises the following steps: selecting a cable core, manufacturing a flame-retardant grid wrapping belt, wrapping the cable core with the flame-retardant grid wrapping belt, and extruding an outer sheath. The processing system comprises a pay-off rack, a guide mechanism, a flame-retardant grid wrapping belt processing mechanism, a wrapping machine, a traction machine, a disc winch and a plastic extruding machine. The flame-retardant grid wrapping belt processing mechanism comprises a grid wrapping belt and a funnel mold, and flame-retardant mud is arranged in the funnel mold. The grid wrapping belt passes through the funnel mold from top to bottom and is coated withthe flame-retardant mud to form the flame-retardant grid wrapping belt, and the flame-retardant grid wrapping belt wraps the rotating cable core. On the premise that the same flame retardance is ensured, the probability of occurrence of defects such as differentiation or deletion of a flame-retardant layer is reduced, the wire diameter of the cable is reduced, and the flame-retardant cable with amore stable structure and a smaller wire diameter is produced, so that the space required by installation and the transportation difficulty are reduced, and meanwhile, the method is simple, convenientto use, simple in device, low in cost and high in practicability.

Description

technical field [0001] The invention relates to the technical field of fire-resistant and flame-retardant cables, in particular to a flame-retardant cable 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 extrusion process, and bec...

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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.

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