Copper coated aluminum uni-core flame-retardant refractory flexible electric cable with double sheath and manufacturing method thereof

Abstract

The invention discloses a copper-clad aluminum single-core flame retardant and fire resisting flexible cable with double jackets 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 at the outer side of the single conductive wire core; plastic is extruded at the outer side of the of the fire resisting layer in an extrusion molding manner so as to form an insulation layer; plastic is extruded at the outer side of the insulation layer in the extrusion molding manner so as to form a restrictive coating, 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 a wire and cable technology, in particular to a copper-clad aluminum single-core flame-retardant fire-resistant double-sheath 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 CN2...

AI Technical Summary

Problems solved by technology

[0003] However, due to the small tensile force and low strength of aluminum, for copper-clad aluminum conductors with small diameters or small amounts of copper, the copper-clad aluminum conductors are easily broken and the processing difficulty is significantly increased, or even impossible to process.

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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