Spiral shield cable sheath extrusion device and anti-broken method

Abstract

The invention aims to provide a spiral shield cable sheath extrusion device and an anti-broken method. According to the method, a conductor wire core released by a pay-off rack is heated before passing through an extrusion machine; and the extrusion machine extrudes a cable sheath by an extrusion or semi-extrusion pipe extrusion technology. The spiral shield cable sheath extrusion device comprises the pay-off rack, the extrusion machine, a cooling water channel, a traction machine and a take-up rack which are arranged sequentially in a serial manner, wherein the extrusion machine comprises a machine frame, an extrusion screw rod in the machine frame and an extrusion die at the machine head part; and a wire inlet heating device is arranged between the pay-off rack and the extrusion machine. The invention has the benefits that the conductor wire core released by the pay-off rack is heated before passing through the extrusion machine, so that sheath materials are filled in a shield spiral groove outside the cable, the bending degree of the cable is supported, and the problem that the cable is broken is solved fundamentally.

Description

technical field [0001] The invention relates to the technical field of spiral shielded cable production equipment, in particular to a spiral shielded cable sheath extrusion device and a breakage prevention method. Background technique [0002] SDY type spiral shielded semi-air insulated low-attenuation coaxial cable is an important component of modern microwave communication and full-channel color TV transmission system. The structure of this cable includes inner conductor, insulation, outer shield and sheath from inside to outside. Wherein the outer shielding is spiral. The production of the above-mentioned cables is highly technical, and the manufacturing process is complicated. The outer diameter of the cables is thick, which can reach more than 100 millimeters, and the cost is expensive. [0003] In the prior art, the sheath layer of the outer shielding of the cable is processed by an extruder, but since the sheath layer does not fill the spiral groove of the outer shie...

AI Technical Summary

Problems solved by technology

The production of the above-mentioned cables is highly technical, and the manufacturing process is complicated. The outer diameter of the cables is thick, which can reach more than 100 mm, and the cost is expensive.

[0003] In the prior art, the sheath layer of the outer shielding of the cable is processed by an extruder, but since the sheath layer does not fill the spiral groove of the outer shielding layer with the sheath material when the sheath is extruded, the cable's The spiral groove of the outer shield cannot be supported by the sheath material, so the cable is slightly bent during installation and laying, and the entire cable may be broken along the helix of the outer shield, resulting in serious losses

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