Spiral shield cable sheath extrusion device

Abstract

The invention aims to provide a spiral shield cable sheath extrusion device. The spiral shield cable sheath extrusion device comprises a pay-off rack, an 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; a wire inlet heating device is arranged between the pay-off rack and the extrusion machine; the extrusion screw rod comprises a screw rod body and screw threads; and the screw threads with different depths are distributed on the screw rod body equidistantly. The spiral shield cable sheath extrusion device has the benefits that the extrusion efficiency is greatly improved; the extrusion amount reaches 200 percent; the extrusion amount is increased, so large back pressure is generated when sheath materials are extruded to a sizing die mouth by the extrusion machine, the 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.

Description

Technical field [0001] The invention relates to the technical field of cable sheath processing equipment, in particular to a spiral shielded cable sheath extrusion device. 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 the inside to the outside. The outer shield is spiral. The above-mentioned cables are highly technically manufactured, the manufacturing process is complicated, the outer diameter of the cable is thick, which can reach more than 100 mm, and the cost is expensive. [0003] In the prior art, an extruder is used to process the sheath layer of the outer shield of the cable, but because the sheath layer does not fill the spiral groove of the outer shield layer with the sheath material when the sheath is extruded, the...

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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