A mold and processing technology for improving the eccentricity of smart energy locomotive cables

Abstract

The invention provides a mold and machining technology for improving the eccentricity of a smart energy locomotive cable. The mold comprises an extrusion mold core, locating bolts, a mold sleeve and a locating mold. The locating mold is of a hollow structure and comprises a mold core locating surface, a mold sleeve locating surface and a pin, wherein the inclined surface at the front end of the inner surface of the locating mold serves as the mold core locating surface, the outer surface of the locating mold serves as the mold sleeve locating surface, and the pin penetrates through the locating mold. The inner taper angle of the mold core locating surface and the taper angle of the extrusion mold core are 45 degrees. By the adoption of the mold for improving the eccentricity of the smart energy locomotive cable, the center of the extrusion mold core and the center of the mold sleeve can be fixed to form a horizontal line, and the situation that an insulator and a sheath have the quite high concentricity can be guaranteed. After the extrusion mold core and the mold sleeve are fixed, the locating mold is drawn out, flowing movement of materials is not affected at all, and therefore the eccentricity and the external diameter of the cable are effectively reduced.

Description

technical field [0001] The invention relates to the field of locomotive cables, in particular to a mold and a processing technology for improving the eccentricity of locomotive cables. Background technique [0002] In recent years, China's locomotive technology has developed rapidly, and locomotive electrical equipment has become more and more sophisticated, so the number of connecting cables inside the locomotive is increasing. However, the interior space of the locomotive is limited, so the requirements for the outer diameter of the cables are becoming more and more stringent. The insulation and sheath materials used for locomotive cables are all low-smoke, halogen-free, flame-retardant and oil-resistant materials. The fluidity of this material is low, and the production of the extruded tube mold will cause the surface of the insulation and sheath to be rough. At the same time, the insulation and sheath are directly connected to the conductor. Insufficient bonding will aff...

AI Technical Summary

Problems solved by technology

However, since the locomotive cable insulation and sheath materials require halogen-free low-voltage oil resistance and high flame retardancy, the fluidity of the material is poor. This scheme adds concentric sizing supports to the original mold, which affects the flow of materials between the mold core and the mold sleeve, resulting in Material clamping area is rough

At the same time, there are many specifications of locomotive cables. During the implementation of this scheme, a large number of molds will be added, which will also cause increased waste.

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