Method for reducing air in core bag of capacitor

Abstract

The invention discloses a method for reducing air in a core bag of a capacitor. The method includes the following steps: firstly, whether the width of a metallized film of an upper film ring and the width of a metallized film of a lower film ring are consistent is judged through a venier caliper, the error should be smaller than 0.1mm, whether the film rings are deformed and whether a slitting face is smooth are judged, after requirements are met, the films are placed onto a machine to be rolled, the edge staggering amount of the films is controlled to range from 0.8mm to 1.0mm in a rolling test, and spot check is carried out in a middle and later period of rolling; then when thermal polymerization is carried out for the first time, the temperature is adjusted to be 70 DEG C, and the polymerization time is 24 hours. Due to proper edge staggering, metal spraying particles and metallized layers on two poles of the core bag are fully combined, gaps on sections caused by edge staggering can be fully sprayed, due to long-time polymerization at 70 DEG C before spraying, stress and moisture in the core bag generated in rolling can be eliminated, logging of the staggered edges can not occur, the metal spraying particles can be fully atomized through fine zinc wires and high metal spraying pressure and can conveniently enter a hollow space of the staggered edges, and the full-filling purpose is achieved.

Description

technical field [0001] The invention relates to the technical field of capacitors, in particular to a method for reducing the air in a capacitor core package. Background technique [0002] At present, with the improvement of people's living standards. With the popularization of household appliances, the market has stricter and stricter requirements on the quietness of household appliances. CBB series capacitors produced by traditional technology will produce humming noise when powered on and affect the mute effect of the switchboard. There are many reasons for humming, but the main reason is that the alternating current and the air remaining in the capacitor form resonance. The CBB65 type capacitor uses vacuum oil immersion technology to remove the residual air in the capacitor and supplement castor oil to fill the hollow, which can reduce or eliminate humming sound. However, the molded case capacitor sealed with epoxy resin cannot use this technology, and there is a ...

AI Technical Summary

Problems solved by technology

However, plastic case capacitors sealed with epoxy resin cannot use this technology. There is a certain hollow phenomenon in the core package of the capacitor, especially under the gold-sprayed layer.

Images