Compound insulator processing technology for extruding irregular sheath

Abstract

The invention discloses a compound insulator processing technology for extruding an irregular sheath. An extruder non-uniformly extrudes during wrapping refined silicone rubber compound on a mandril; an irregularly shaped sheath is formed on the surface of the vulcanized mandril; the vulcanized and molded mandril is put into an injection die; and an injector is used for injecting an outer umbrella skirt of a compound insulator to vulcanize and mold the compound insulator. In the compound insulator processing technology, by adopting the extruder for extrusion, the irregularly shaped sheath is formed on the surface of the mandril; as the shape of the sheath is irregular, the vulcanizing process of the subsequent umbrella skirt is easier and more convenient; and problems of bubbles, low adhering property and the like in the vulcanizing process can be solved; furthermore, by adopting the technology, the situation that the mandril is eccentric to the sheath due to the unidirectional injection force during injection can be avoided, and damages, such as hurting, whitening and the like which are caused by mechanical positioning, to the surface of the mantril at high temperature can be prevented.

Description

technical field [0001] The invention relates to a composite insulator processing technology, in particular to a composite insulator processing technology for forming an irregular-shaped sheath in the extrusion process. Background technique [0002] Composite insulators are a special insulation control that can play an important role in overhead transmission lines. Composite insulators are mainly composed of umbrella groups, sheaths and core rods. Umbrella shed and sheath forming process At present, there are three main processes for producing suspension composite insulators at home and abroad: integral extrusion sheath and umbrella penetration, integral molding and integral injection molding. [0003] The production cost of integral extruded sheath through umbrella is low, the organization and production are convenient, and it is easy to meet the requirements of customers with multiple specifications and small quantities. However, room temperature vulcanized rubber is used...

AI Technical Summary

Problems solved by technology

However, this production process has problems of mandrel eccentricity and damage. High-temperature and high-pressure silicone rubber is injected into the mold cavity from one side of the mandrel, which can easily cause mandrel eccentricity, and the thickness of both sides of the sheath is uneven. In serious cases, the mandrel is not protected. , after long-term operation, the mandrel will be brittle and broken, and serious accidents may occur