A foam cable, injection mold, foam extruder and production process

Abstract

The invention relates to the technical field of cable production, in particular to a foaming cable, an injection mould, a foaming extruder and a production process. The foaming cable has the advantage of good bending performance. The foaming cable comprises a conductive wire core and a foaming insulating layer arranged on the outer side of the conductive wire core. The foaming insulating layer is internally provided with a plurality of inner holes along the length direction of the cable, and the inner holes surround the conductive wire core. The foaming insulating layer wraps the conductive wire core to protect the conductive wire core, so that the conductive wire core will not be exposed when the foaming insulating layer is slightly worn out. At the same time, the bending performance of the cable is enhanced by arranging the inner holes along the length direction of the cable.

Description

technical field [0001] The invention relates to the technical field of cable production, in particular to a foamed cable, an injection mold, a foaming extruder and a production process. Background technique [0002] The purpose of foaming the foam cable is to make the product lightweight, strengthen the thermal insulation and turbulence of the product, and increase the threshold value of the tangent value of the dielectric loss angle. Because the polarization loss increases with the increase of frequency at high frequency, especially when the capacitor adopts polar dielectric, the polarization loss increases rapidly with the increase of frequency. It is easy to cause the capacitor insulating material to break down due to overheating, so it is necessary to maintain a small loss tangent when working. [0003] The existing invention patent with the authorization announcement number CN 101821820UB discloses a high-foaming coaxial cable. In the technical solution, in the insula...

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Problems solved by technology

[0004] The above-mentioned prior art solution has the following defects: in order to protect the internal conductive core of the high-foaming coaxial cable, a thicker foam insulating layer is provided on the outside of the conductive core for protection, and the thicker The foam insulation layer will not break due to a little abrasion and expose the conductive core, but it will also affect the bending performance of the cable

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