Adjustment of ink machine scraper

The impact of the ink machine doctor blade on the quality of the screen printing is quite important, so the quality of the selected doctor blade and the correct adjustment of the doctor blade are the key points. The point and purpose of our research talk is: How to choose a suitable ink machine How to adjust the squeegee and squeegee to ensure the quality of the print and the service life of the squeegee.

Adjustment of ink machine scraper

To achieve the above two points, it can be ensured that the ink on the roller can be scraped clean, leaving no defects of the knife and plate fog. We need to divide the ink squeegee mechanism into several functional devices. The functional components mainly include a driving device for squeezing the blade left and right, a squeegee blade separating and pressing device, a squeegee blade lifting device, a squeegee blade angle adjusting device and a blade squeegee device. Some of the left and right squeegee blades are driven by a separate motor, and some are driven by the main drive and then decelerated by the worm gear. The clutch pressure of the squeegee is achieved through the air-to-air shutoff of the squeegee. The function of the squeegee is to make the squeegee contact or Off-print roller; squeegee blade lifting device is realized by rack and pinion, which can realize pressure adjustment; squeegee blade angle adjustment is realized by worm gear and worm, suitable angle is crucial; scraper clamp device consists of upper clamp plate. , Lower splint, scraper pad and scraper blade make it easy to adjust the amount of blade extension.

The function parts of each part of the squeegee mechanism affect the quality of the printed product from different aspects. Therefore, the adjustment of the squeegee is very important. It has been found in long-term production practice that as long as the functional devices of the squeegee mechanism are properly adjusted before printing, the defects that affect the quality of the printed product can be avoided. The following are some lessons from squeegee adjustment:

1. The left and right squeegee of the squeegee is realized by the rotation of the eccentric shaft. There is a sudden change of the speed from the left limit to the right limit. Therefore, the ratio of the number of reciprocating movements per minute from the squeegee to the rpm of the platen roller is infinitely small. , Generally choose 1/7 or 1/9, this can change the track of the squeegee on the plate roller, and it can bring the squeegee's impurities down through the left and right squeezing and reduce the knife line, so that the squeegee effect is better. Rotate the eccentric shaft to the left limit and adjust the thread of the joint bearing so that the compression spring inside the left bracket receives the maximum amount of compression.