Soft magnet ferrite magnetic ring surface plastic coating method

Abstract

A method for coating plastics on the surface of soft magnetic ferrite ring features the plastic coating technology including powder spraying twice and thermosetting twice is used, and the additional powder is supplemented to the upper and lower end faces of magnetic ring for increasing its thickness. Its advantage is high voltage withstanding of ferrite ring (more than 200V).

Description

1. Technical field [0001] The invention relates to a method for coating the surface of a soft ferrite magnetic ring with plastic, and belongs to the technical field of plastic coating. 2. Background technology [0002] In order to enhance the safety and reliability of electronics, electrical appliances, and power equipment, the widely used inductors made of multi-turn enameled wires wound on magnetic rings are required to prevent voltage breakdown and enhance withstand voltage. The method of plastic-coating the surface of the soft ferrite magnetic ring is adopted. The methods reported and used are as follows: [0003] The magnetic ring with an outer diameter of Φ6mm or less adopts the vapor phase low temperature deposition method. The plastic coating material is Parylin, which is transparent and colorless, and the coating thickness is 5μm-10μm. When the magnetic ring has no burrs and no secondary edges, the withstand voltage can meet the requirements, and the plastic coati...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of the plastic coating method of the above outer diameter ≥ 6mm magnetic ring, the present invention provides an improved method, which mainly solves the problem of high voltage breakdown on the inner and outer sides and both ends of the plastic coated magnetic ring, and at the same time improves the qualified rate of plastic coating