Device and method for measuring the screen tension of the screen fabric in a silk screen frame

Abstract

The inventions relates to an apparatus, in particular for a screen-printing machine, for measuring tension in a printing screen in a frame, characterized in that a holder for the frame (1) has holder bars (3a, 3b, 3c, 3d) each formed of a plurality of sections (3a1, 3a2, . . . , or 3b1, 3b.2, . . . , or 3c1, 3c2, . . . , 3d1, 3d2, . . . , ) each provided with a respective sensor (6) for measuring tension. The invention furthermore relates to a method, in particular for a screen-printing machine, for measuring tension in a screen in a screen frame, characterized in that a screen (2a) mounted in a frame (1) is mounted in a holder (3) having holder bars (3a, 3b, 3c, 3d) each formed by a plurality of sections (3a1, 3a2, . . . , or 3b1, 3b.2, . . . , or 3c1, 3c2, . . . , 3d1, 3d2, . . . ) each provided with a respective sensor (6) that measure forces between the respective section (3a1, 3a2, . . . , or 3b1, 3b.2, . . . , or 3c1, 3c2, . . . , 3d1, 3d2, . . . ) and the frame (1).

Description

technical field [0001] The invention relates to a device for measuring the screen tension of a screen fabric in a screen frame, which can be used in particular for screen printing machines. The invention also relates to a method for measuring the screen tension of a screen fabric in a screen frame, in particular for a screen printing machine. Background technique [0002] Printing machines which operate according to the screen printing principle, in particular screen printing machines which operate with a flat screen, have long been known and can be used for batch printing of a wide variety of products. For example, optical storage media such as CDs or DVDs can be printed by screen printing, and clothing, bottles, cans can also be printed by screen printing equipment, especially in the manufacturing process of electronic devices. Apply solder paste or resist mask to printed circuit board material. [0003] The ink is usually applied to the surface to be printed using flat ...

AI Technical Summary

Problems solved by technology

[0009] The disadvantage of the above method is that if the tension of the screen decreases and the pressing force of the squeegee is readjusted in time, there is also the risk of the contact area between the underside of the screen and the surface of the substrate becoming larger, especially when the screen tension changes unevenly , the contact area will change unevenly, resulting in uneven printing

[0010] Another disadvantage: DE3805363 does not provide a way to identify broken wire mesh

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