Matters needing attention in the printing process of Flat Screen Printer
For screen printing completed by the cooperation of multiple people, only the upper process is responsible for the next process, and the self-inspection and self-inspection of the respective processes are carried out, and the quality is strictly controlled, in order to produce screen printing products that are satisfactory to users. The perfect match between the screen, ink and printing is a prerequisite for obtaining good prints. The quality of the printing plate directly determines the quality of the printing quality. Printing is only a test of the quality of the plate making. However, under the premise of stable quality of the printing plate, due to the carelessness of the printing workers, the ideal printed matter cannot be obtained, but it will cause Greater waste, defective products or waste products.
Before batch printing, you should fix the Flat Screen Printer screen and pour the ink for trial printing, and check the level, ink color, ink layer thickness, specifications, registration accuracy, etc. of the graphic reproduction on the layout. If the registration accuracy is poor, you can adjust it according to the fine-tuning knob on the front of the frame; if the hue of the ink is not correct, check whether the wrong ink is used and replace it immediately; if the ink is poor, wipe the graphic part of the printing plate with a solvent to make the ink transparent The performance and wettability of the substrate have been improved to a certain extent; if there is a big difference in the tone and level of the graphics and text, the printing screen should be replaced immediately. The following points must be paid attention to during the printing process.
(1) Watch the rules diligently. Since the plate frame moves back and forth during printing, the printing plate and the frame are subject to collision and vibration during the reciprocating movement. A small displacement between the two will cause inaccurate overprinting and affect the appearance quality of the product. Therefore, we must pay attention to the rules, find out in time, and adjust in time.
(2) Check the proofs often. If it is found that the print is short of ink, wipe the screen with a clean cotton cloth immediately. This situation is mostly caused by the broken plastic film stuck on the printing plate or the drying of the ink crust and blocking the screen. If you find that the ink color is uneven or light, it may be that the ink viscosity is too high. You should stop the machine immediately to dilute the ink viscosity with a solvent, and wipe the graphics and text parts of the layout with gasoline to prevent ink bleeding or blocking the network for continuous work.
(3) The stacking of semi-finished products should be neat. In the process of stacking semi-finished products, the two sides of the paper must be stacked down. Otherwise, the paper will form an upward bow due to its own gravity, and the two sides of the paper will be warped and not flat, which will cause difficulty in paper transfer during printing, and often breakage. When the paper stack is uneven, it can be leveled up with cardboard. At the same time, the height of the paper stack should be adjusted with the adjustment knob of the paper separation mechanism so that the paper transfers smoothly and the printing process goes smoothly.
(4) The blades of the drying device are damaged due to long-term use. In some places, the operation of the main machine is not synchronized, which often causes the phenomenon of random sheets of printed matter on the paper rack. At this time, you should have eye problems and quick hands, and immediately remove from the bottom of the chaotic sheet. It is best not to make the ink film face opposite to avoid sticking and causing defective or waste products.
Therefore, only by paying attention to the various links that affect the quality of Stenter can we print exquisite prints, increase the yield, reduce consumption and increase efficiency, and make the company invincible in the market competition.