Flat enameled wire painting mold and paint film coating process method

Abstract

The invention discloses a flat enameled wire painting mold which comprises a painting mold body and a mold part, and the mold part is provided with an insertion hole allowing a flat wire to be inserted through. The mold part comprises two long edge parts, two short edge parts and four round convex parts, and the two long edge parts, the two short edge parts and the four round convex parts define a rectangular structure; the circular convex parts are connected with the adjacent long edge parts and short edge parts; the middle positions of the long edge part and the short edge part are respectively provided with a sunken part which is sunken outwards; by arranging the round convex part and the concave part on the mold part, according to the surface tension and leveling principle of paint liquid, the insulating film with the equal thickness can be stably formed on the whole circumference and the whole length direction of the flat wire, so that after the wire is painted, the paint liquid coated at the corresponding position is larger, and under the action of the surface tension of the paint liquid, the thickness of the flat wire is reduced. And four R corners and four-side paint films can be ensured to be as uniform as other positions.

Description

technical field [0001] The invention relates to the technical field of flat enameled wires, in particular to a flat enameled wire painting mold and a process method for coating a paint film. Background technique [0002] For flat enameled wire, the "dog bone" of the paint film has always been a difficult point in the industry. In terms of the uneven thickness of the insulation film, due to the high voltage pressure, the weakest point in the insulation is easy to break down or other adhesion properties. Therefore the purpose of the present invention is to provide the coating mold that flat enameled wire is used and the manufacture method of the flat enameled wire that uses it, the coating mold that this flat enameled wire is used can suppress paint film inhomogeneity phenomenon, and can guarantee electric property, chemical property, Both adhesion and appearance are good. [0003] refer to figure 1 , this figure is the schematic cross-sectional view of the flat enameled wir...

AI Technical Summary

Problems solved by technology

[0003] refer to figure 1 , this figure is the schematic cross-sectional view of the flat enameled wire in the prior art after being painted, because the flat enameled wire is subjected to the surface tension of the paint liquid when the insulating layer is coated, the 4 "R angles" and narrow sides (two side edges) ) The paint film is more than 20% smaller than other positions, and the safety and consistency of baking cannot be guaranteed

The uniformity of paint is the key to insulated wires, and the mold method is a common process for painting flat enameled wires. The paint die hole designed by general molds generally adopts the same shape as the wire, which can make the wires stick evenly around the paint when painting. However, after baking, due to the different curvatures of the lacquer liquid in the flat area and the rounded area of ​​the flat enameled wire, the insulating varnish in the rounded area will flow to the flat surface due to the curvature effect from painting to the end of baking. area, which makes the thickness of the chamfered area thinner, and then the thickness of the insulating layer in the rounded chamfered area and the flat area is inconsistent. The wide side is the unevenness of the insulation layer

Images