Automatic contraposition method and system for screen process press

Abstract

The invention relates to an automatic aligning method and a system which are used for a screen printing machine. The method comprises the following steps: three lenses are adjusted based on a first piece of printing stock aligned with a halftone screen, to cause the centers of the cross curves of the lenses to be coincided with arbitrary three points on two outer edges of the first piece of printing stock, and the three points are recorded as the reference coordinate points; corrsponding outer edges on a sequent printing stock are captured, three corresponding points intercrossed with the cross curves of the lenses are obtained, and the coordinates of the three points currently captured are calculated based on the three reference coordinate points; the coordinates of the three points currently captured and the recorded three reference coordinate points are compared to determine the movement of a printing platform relative to the halftone screen; based on the determined result, an X axle motor, a Y axle motor and a rotating motor are controlled to respectively drive the printing platform to do linear displacement in X axle direction and Y axle direction and rotate along the Z axle. The invention utilizes the CCD lens to capture the location of the printing stock to adjust the printing platform for automatic aligning, therefore, the accurate alignment is ensured, and the production efficiency is improved.

Description

technical field [0001] The present invention relates to a screen printing machine, and more particularly to an automatic alignment method and system for a screen printing machine. Background technique [0002] With the development of technology, screen printing has been widely used in various industries such as LCD, IC packaging, PCB printing, packaging and decoration because of its high printing precision and good quality. The precise alignment between the screen and the substrate is an important factor that determines the printing accuracy and quality of the screen printing machine. Existing semi-automatic screen printing machines all adopt platform fixed structure and manual feeding. Such as figure 1 As shown, the printing platform 12 is fixedly installed on the frame 11, and each time the material is fed, the worker takes the reference line of the plate as a reference, and then roughly judges the placement position visually to place the substrate. The defects of this ...

AI Technical Summary

Problems solved by technology

The defects of this kind of printing machine are obvious, the labor intensity of the operator is high, the production efficiency is low, and the alignment between the screen plate and the substrate is not accurate

In addition, there are some screen printing machines that use mechanical alignment, and set positioning pins and other mechanisms on the printing platform as alignment references, but this type of mechanical alignment screen printing machine cannot meet the production of high-precision, small-size substrates need

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