A cable insulation extrusion equipment with automatic concentricity adjustment

Abstract

The invention discloses cable insulation extrusion equipment capable of automatically adjusting concentricity. The cable insulation extrusion equipment comprises an inner mold core for limiting a position of a to-be-extruded cable, and an outer mold sleeve for extruding an insulating material and coating the exterior of the cable, wherein the outer side of the inner mold core is coaxially sleeved with the outer mold sleeve, and the inner mold core is positioned on the upstream of the outer mold sleeve; the cable insulation extrusion equipment is characterized by also comprising an upstream concentric guiding sleeve which is arranged on the upstream of the outer mold sleeve, and a downstream concentric guiding sleeve which is arranged on the downstream of the inner mold core; the upstream concentric guiding sleeve and the downstream concentric guiding sleeve are both coaxially arranged with the outer mold sleeve; the upstream concentric guiding sleeve comprises a hard guiding sleeve external pipe and a guiding sleeve rubber ring arranged in the hard guiding sleeve external pipe; and the inner diameter of the guiding sleeve rubber ring is the same as the outer diameter of the to-be-extruded cable. By adoption of the cable insulation extrusion equipment, relatively high concentricity between the cable and the mold can be ensured, so that the eccentricity quality of an insulation layer of a cable, a tracing band and other product can be ensured consequently.

Description

technical field [0001] The invention relates to the technical field of processing equipment for cables or heating tape products, in particular to a cable insulation extrusion equipment for automatically adjusting concentricity. Background technique [0002] The processing technology of products such as cables or heating cables mainly includes drawing, twisting and covering: drawing is mainly used to process the conductive core of cables or heating cables, and the metal rod or thicker metal wire is forced through the mold by pulling force , the cross-sectional area of ​​the metal rod or metal wire is compressed and obtains the required cross-sectional shape and size; twisting is to improve the softness and integrity of the cable or heating cable core, and to overcome the single cable or heating cable core The skin effect exists, and multiple single wires are intertwined together in a predetermined direction; coating mainly refers to wrapping one or more layers of insulating m...

AI Technical Summary

Problems solved by technology

The factors that affect the eccentricity of the insulating layer of products such as cables or heating cables are mainly divided into two parts: one is the plasticization of the insulating material itself, specifically the melting temperature of the plastic, the shear strain rate of the insulating material, and the melting and heating of the plastic. Mixing time and other process parameters; the second is the concentricity of the cable and the mold when the insulating material is extruded. When the tension of the cable is not enough or the concentricity with the mold is poor, although the cable The concentricity at the extrusion port of the inner mold core can be guaranteed, but the concentricity at the extrusion port of the cable and the outer mold sleeve will have a large deviation, which will affect the eccentricity of the insulating layer

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