Polychrome connection silk screen printing process and equipment thereof

Abstract

The invention discloses a polychrome connection silk screen printing process and equipment thereof, and relates to the technical field of sheet-fed rotary screen printing. The printing process comprises the following steps: transferring the printing ink to relief printing plates on four color mould drums by utilizing a four-color-group ink supply unit in satellite-type layout; converging the different colors onto the color gathering rubber blankets of a double-diameter impression cylinder in different zones by different color mould relief printing plates; transmitting the different colors onto a connection cylinder printing plate in a silk screen cylinder by combining a special money printing connection process through a big neutral position to form an accurate printing ink pattern; and finally rolling the printing ink pattern onto the paper sheet through the silk screen plate to form a polychrome connection pattern. The invention can realize the connection silk screen printing process of different-color counterfeiting inks, such as OVI and OVMI, and also can realize a puzzle connection silk screen printing process and a mixed-color silk screen printing process of common printing ink, OVI, OVMI and colorless fluorescent ink and the like. The printing production has high yield and accurate connection, and is convenient in operations of washing, replacing and tightening the silk screen plates.

Description

technical field [0001] The invention belongs to the technical field of sheet-fed rotary screen printing, and particularly designs a multi-color wiring screen printing process and equipment thereof. Background technique [0002] As a direct printing method, screen printing has unique printing characteristics: thick ink layer of screen printing, rich printing quality and strong three-dimensional effect; uniform ink layer of graphics and text, strong covering power, and large-area solid printing can be realized. For anti-counterfeiting inks such as OVI, the printing anti-counterfeiting effect is outstanding (the Hong Kong dollar OVI uses screen printing), and the anti-counterfeiting effect of optical change is obviously better than that of engraving gravure printing. However, at present, screen printing in the world has the problems of single printing method and few colors. [0003] In China, most screen printing machines are platform screen printing machines, that is, the sub...

AI Technical Summary

Problems solved by technology

[0010] It can be seen that in the above technical solution, two screen rollers are used for cooperation, and this method does not exceed 2 colors at most, and it is difficult to realize the overprinting function of the same position area

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