Slurry barrier strip for silk-screen printing and use method of slurry barrier strip

Abstract

The invention discloses a slurry blocking strip for silk-screen printing. The slurry blocking strip comprises a pair of vertical end faces, a horizontal bottom face and a slurry blocking face obliquely arranged over the bottom face, and the slurry blocking face is composed of a pair of inclined faces. When the slurry blocking strip is used in silk-screen printing, slurry can be distributed more uniformly, and the process precision, uniformity and stability of silk-screen printing can be improved.

Description

technical field [0001] The invention relates to the technical field of screen printing, in particular to a paste bar for screen printing and a method for using the same. Background technique [0002] The screen printing machine mainly includes: printing head (including scraper, ink return knife), printing table, screen frame and so on. The screen plate is fixed on the screen frame, the screen plate is squeezed and deformed by the scraper, and the slurry on the screen plate is extruded out of the pattern, and then the slurry scraped by the scraper is scraped back to the original position by the ink return knife, and this is done once printing process. [0003] Such as figure 1 As shown, in the case of long-term multi-batch printing, due to the deformation of the screen plate by the scraper, the screen plate will have a low middle part and a height difference on both sides, and the slurry is fluid. The slurry will flow slowly from the high position to the low position, resu...

AI Technical Summary

Problems solved by technology

[0003] like figure 1 As shown, in the case of long-term multi-batch printing, due to the deformation of the screen plate by the scraper, the screen plate will have a low middle part and a height difference on both sides, and the slurry is fluid. The slurry will flow slowly from the high position to the low position, resulting in more and more slurry in the middle of the screen, and less and less slurry on both sides of the screen. In the case of less material, when the scraper is pushed forward again, more paste will be squeezed out in the middle of the screen, and relatively less paste will be squeezed out on both sides of the screen, which will affect the uniformity of printing.

[0004] Taking screen printing technology in the photovoltaic industry as an example, screen printing in the photovoltaic industry has high requirements for printing accuracy, uniformity, and continuity. If printing metal electrodes, uneven paste will affect current collection. Miscellaneous paste, uneven printing will lead to uneven doping square resistance, and large differences in junction depth and concentration in different regions

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