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Hangzhou Taoxing Printing Machinery Co.,Ltd

Working principle of screen printing machine

① flat screen printing machine working cycle program to flat screen version of the platform monochrome semi-automatic hand noodles screen printing machine as an example, it is a working cycle is: Feed → positioning → drop version → drop to ink board, lift back to ink plate → scrape ink travel → up to ink plate → ink board → lift version → return trip → remove positioning → pickup.

In continuous cycle action, as long as the function can be achieved, each action should take up as short a time as possible, in order to shorten the same period of each work cycle, improve work efficiency. ③ imprint Line. In the printing itinerary, to the ink plate extrusion ink and screen printing plate, so that screen printing plate and substrate to form a contact line, known as imprint Line. This line at the edge of the scraping plate, countless imprint lines constitute the printing surface.

It is difficult to achieve the ideal imprint line because the printing stroke is a dynamic process. The working principle of ③ screen printing machine. Taking the commonly used hand mesh plate planar screen printing machine as an example, the working principle of the screen printing press can be described as follows: through the transmission mechanism transmission power, so that the scraper in the movement of extrusion ink and screen printing plate, so that screen printing plate and substrate to form a imprint line, because the screen has tension N1 and N2, on the scraper production Force F2

Resilience so that screen printing plate in addition to the imprint line is not in contact with the substrate, ink in the scraping plate extrusion force F1, through the mesh, from the moving imprint line leakage to the substrate. In the printing process, screen printing plate and scraping ink plate for relative movement, extrusion pressure F1 and rebound F2 also with the synchronous movement, screen in the rebound effect, timely return and substrate out of contact, so as not to rub the imprint dirty.

That is, the screen in the printing itinerary, constantly in the deformation and rebound. Scratch Ink Plate After the completion of one-way printing and screen printing plate with the separation of the substrate, at the same time for return return ink, that is, complete a printing cycle. After the return of ink substrate and screen printing plate opposite the distance is called the same version distance or mesh distance, generally should be 2~5mm. When printed manually, the operation of the worker's technique and proficiency directly affect the formation of the imprint line. In practice, screen printing workers have accumulated a lot of valuable experience, which can be summed up as six points, that is, to ensure that the scraping plate movement in the straightness, uniform, isometric, uniform pressure, center and vertical edge. In other words, when printing scraping ink plate should be straight forward, can not shake left and right, can not be fast after slow, before fast after slow or slow; to the tilt angle of the ink plate should remain unchanged, especially to overcome the increasing tilt angle of the common disease; printing pressure to maintain uniform and consistent; Keep the scraper and the inside of the mesh frame equal distance ; go to the ink plate and keep it perpendicular to the border.

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