Copper coated aluminum uni-core flame-retardant refractory flexible electric cable manufacturing method

Abstract

The invention discloses a copper-clad aluminum single-core flame retardant and fire resisting flexible cable and a manufacturing method thereof. The manufacturing method comprises the steps that: a copper-clad aluminum conductor is made into a single conductive wire core; a fire resisting layer is formed on the outer surface of the single conductive wire core; the step of the insulation process is that a flame retardant is extruded on the fire resisting layer so as to form an insulation layer. wherein, the step that the copper-clad aluminum conductor is made into the single conductive wire core comprises the steps that: a wire-drawing machine is utilized to draw the copper-clad aluminum conductor into a single conductive filament; an annealer is utilized to carry out an annealing process to the single conductive filament; a wire-bunching machine is utilized to bunch a plurality of annealed single conductive filaments into braided wires; a wire twisting machine is utilized to twist a plurality of braided wires into the conductive wire core. The cable of the invention has the advantages of low copper consumption, light weight and low cost. As a single filament structure with multiple filaments and small diameter and a multi-strand twisting technology are adopted, the cable is particularly flexible and can be bended randomly.

Description

technical field [0001] The invention relates to the technical field of wires and cables, in particular to a copper-clad aluminum single-core flame-retardant and fire-resistant flexible cable and a manufacturing method thereof. Background technique [0002] For the concept of copper-clad aluminum, wire and cable manufacturers are no strangers, that is, the structure of each conductive monofilament that constitutes the conductive core is processed into the outer layer of copper and the inner layer of aluminum, which can save a lot of belongings. Copper, a strategic resource, can make copper play its biggest role. In the literature such as Chinese patent literature, there are many reports in the past, such as: the copper-clad aluminum communication cable introduced by the Chinese patent authorization announcement number CN2881898, the copper-clad aluminum data communication cable disclosed by CN2881899, and the copper-clad aluminum conductor communication cable recommended by C...

AI Technical Summary

Problems solved by technology

[0003] However, due to the small tensile force and low strength of aluminum, for copper-clad aluminum wires with small diameter or small amount of copper, the copper-clad aluminum wires are easy to break and the processing difficulty is significantly increased, and even cannot be processed at all.

However, if the diameter is increased or the amount of copper used is increased, the cable will be hardened, which is not conducive to laying

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