A kind of precision screen printing process method

Abstract

The invention provides a precise screen printing process method, which completes the transfer of film graphics to the screen by means of double exposure. The specific method steps are: A) film production, first film compensation, and secondly adding typesetting positioning to ensure The typesetting position deviation of the screen plate during the second printing is less than or equal to 100μm; B) printing, typesetting and printing are performed according to the typesetting position required for printing; the initial printing energy is set to the minimum exposure latitude; The plate energy value is set to the peak of the optimum exposure. The method of the invention uses a parallel light printing machine for printing, so that the pictures and texts are clearer, and the edge jaggedness and side false exposure are effectively controlled; at the same time, because the screen has undergone 2 exposures, the exposure energy is sufficient, and the screen film is resistant to Printing rate increased.

Description

technical field [0001] The invention relates to the technical field of printing, in particular to a precision screen printing process method. Background technique [0002] Under normal circumstances, there are three methods of screen printing plate making: (1) paint film engraving method, which is a kind of manual plate making method, which is relatively simple; (2) carbon paper printing method, which is also a relatively simple manual plate making method (3) photosensitive plate-making method, the printing plate used for silk screen printing signs requires high precision, and generally adopts advanced direct, indirect, and direct three photosensitive plate-making methods. The screen exposure process is an essential and critical plate-making process in these methods. [0003] Printing means exposure, and printing is the work of photocopying the pictures and texts on the film with pictures and other carriers with high transparency to the screen coated with photosensitive mat...

AI Technical Summary

Problems solved by technology

[0008] 1. The light source of the printing machine is non-parallel light, and side exposure is easy to occur during the screen exposure process (that is, the ultraviolet light passes through the film film obliquely, causing the inner side of the edge of the black film to be exposed and cured)

[0009] 2. The exposure is only carried out once. One exposure needs to take into account the image resolution and printing durability of the precision screen, which cannot be achieved at the same time. Because the exposure energy setting basically cannot choose the best exposure energy peak value, the photosensitive adhesive has not fully developed. Photo-crosslinking reaction, poor printing durability of the plate film

It is difficult to reduce the number of pinholes when one exposure is completed