Plug hole positioning structure for three-machine wired screen printing machine

Abstract

The invention discloses a plug hole positioning structure for a three-machine wired screen printing machine, and relates to the technical field of PCB processing. In the prior art, plugged holes cannot be detected, and once errors occur in a previous process or a screen printing plate is blocked, part of holes cannot achieve the hole plugging effect, so that produced products must be reworked so as to reduce the production efficiency and affect the product quality. Based on the problems in the prior art, the invention provides the following scheme that the plugged hole positioning structure comprises a screen printing machine table and a limiting frame arranged on the upper side of the screen printing machine table, a plurality of positioning columns positioned on the inner side of the limiting frame are arranged on the upper side of the screen printing machine table, and the inner side of the limiting frame is sequentially provided with ink-phobic paper, developing and printing paper and a PCB from bottom to top. According to the invention, whether a plug hole is blocked or not can be detected by observing ink trace on the surface of developing and printing paper, so that the condition of secondary rework caused by the fact that the plug hole is not blocked is avoided, and the problem that the quality of a PCB is affected by ink diffusion can be avoided through ink-phobic paper.

Description

technical field [0001] The invention relates to the field of PCB board processing, in particular to a plug hole positioning structure for a three-machine connection screen printing machine. Background technique [0002] In recent years, with the rapid development and rapid changes of science and technology, while the level of productivity has been continuously improved, people's lifestyles and consumption concepts have also been changed. High requirements, not only the requirements for appearance and function tend to be diversified and personalized, but also the quality and price of products and services. The ever-increasing requirements will undoubtedly pose another round of challenges to enterprises. How to maximize profits while meeting the high demands of consumers is a difficult problem that enterprises must solve. In addition to trying their best to reduce costs, many companies are introducing automation equipment to reduce labor costs and improve production efficienc...

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