Cable insulation extrusion process capable of realizing automatic regulation of concentricity

Abstract

The invention discloses a cable insulation extrusion process capable of realizing automatic regulation of concentricity. Equipment for the cable insulation extrusion process includes an insulation layer extrusion mold which comprises an internal core, an outer sleeve, an upstream concentric guide bushing and a downstream concentric guide bushing; each of the upstream concentric guide bushing and the downstream concentric guide bushing comprises a hard tube of the guide bushing and a guide bushing rubber ring disposed in the hard tube of the guide bushing. The cable insulation extrusion process includes the steps of S1, regulating the direction of a to-be-extruded cable so that the to-be-extruded cable cannot rub against the inner wall of the internal core when running through the internal core; S2, regulating positions of the upstream concentric guide bushing and the downstream concentric guide bushing so that the guide bushing rubber rings of the upstream concentric guide bushing and the downstream concentric guide bushing are free of deformation; S3, regulating positions of an upstream tension pulley and a downstream tension pulley so that the guide bushing rubber rings of the of the upstream concentric guide bushing and the downstream concentric guide bushing are free of deformation. The cable insulation extrusion process can guarantee quality of eccentricity of insulation layers of products such as cables and tracing ribbons.

Description

technical field [0001] The invention relates to the technical field of processing equipment for cables or heating cables, in particular to a cable insulation extrusion process 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 materials ...

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

Images