Rotating arm clamp of vertical coating machine and coating method of vertical coating machine

Abstract

The invention relates to the field of manufacturing of printed circuit boards, in particular to a rotating arm clamp of a vertical coating machine and a coating method of the vertical coating machine.According to the rotating arm clamp of the vertical coating machine, the shape of each clamping tooth is changed to a rectangular solid, so that wear of contact faces is reduced, and the service lifeof the clamp is prolonged; compared with clamping teeth with mutually meshed thread ditches, the improved rectangular-solid-shaped clamping teeth are not prone to ink accumulation, ink can rapidly flow away from the space between the rectangular-solid-shaped clamping teeth, and the occurrence rate of ink accumulation is greatly lowered; and in this way, it is guaranteed that the contact face between each clamping tooth and a substrate is the minimum, and the problem that product scrapping is caused by the enlarged contact face after the clamping teeth accumulate ink is solved. Meanwhile, evenif the ink is accumulated between the clamping teeth, since the clamping teeth are the rectangular solids, the ink accumulation problem can only happen to the roots of the rectangular solids. According to the rotating arm clamp of the vertical coating machine and the coating method of the vertical coating machine, the contact faces of the clamping teeth are designed to be flat faces, and comparedwith the thread ditches, the flat contact faces are not prone to remaining ink or accumulating ink.

Description

technical field [0001] The invention relates to the field of printed circuit board production, in particular to a swing arm clip of a vertical coating machine and a coating method. Background technique [0002] The coating machine is mainly used in the production process of surface coating. A layer of glue, paint or ink with specific functions is coated on the surface of the rolled substrate, and then dried. Coating machines are divided into brush type, air knife, scraper type and roller type. Both ends of the roller-type vertical coating machine are equipped with support arms vertically arranged up and down. Through the transmission of belts, chains or cables, the coating mechanism moves up and down and coats along the surface of the substrate. When the vertical coating machine is switched from the oven, the swing arm type is mainly used, and the swing arm clamp that can clamp the substrate is provided on the vertical frame. At present, the arm clamp of the vertical coati...

AI Technical Summary

Problems solved by technology

At present, the arm clamp of the vertical coating machine adopts a threaded design, but due to the narrow thread, the thread coverage is too wide, and the contact surface is too large, which makes the substrate easy to wear

If the depth of the thread groove is designed shallower, although the wear can be alleviated to a certain extent, it is easy to accumulate ink

However, if the depth design of the threaded groove is too deep, then in order to reduce the contact area between the clip and the substrate, the thread per unit area will be reduced accordingly, which will easily cause the board to fall off

The threaded arm clip is inconvenient to clean after the groove is full of ink. After the groove is full of ink, the gap between the teeth of the clip is filled after drying, so that the actual contact surface between the clip and the board is flat, which leads to the clip The contact surface becomes larger

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