Before batch printing, the printing screen should be fixed and ink-injected to test the layout, check the layout of the graphic and text, ink color, ink layer thickness, specifications, registration accuracy and so on. If the registration accuracy is poor, you can adjust according to the fine adjustment knob on the front of the frame; if the hue of the ink is wrong, check if the wrong ink is used and replace it immediately; if the ink is bad, use the solvent to wipe the graphic part of the printing plate to make the ink transparent. The performance and the wettability of the substrate are improved; if the tone and level of the graphic are greatly different, the printing screen should be replaced immediately. The following points must be noted during the printing process.
(1) Always check the proofs. If the printed matter is found to be out of ink, the screen should be wiped with a clean cotton cloth immediately. Most of this is due to the fact that the plate is stuck with a broken plastic film or the ink crust is dry and clogged. If the ink color is found to be uneven or light, it may be that the viscosity of the ink is too large. Immediately stop the solvent to dilute the viscosity of the ink. At the same time, use the gasoline to wipe the graphic part of the layout to prevent bleeding or blocking the net for continuous operation.
(2) Look at the rules. Since the frame moves continuously back and forth during printing, the plate and the frame are subjected to collision and vibration during the reciprocating operation. When a small displacement occurs between the two, an inaccurate overprinting phenomenon occurs, which affects the appearance quality of the product. Therefore, we must look at the rules, find out in time, and adjust in time.
(3) The stacking of semi-finished products should be neat. During the stacking process of the semi-finished products, it is necessary to stack the two sides of the paper. Otherwise, the paper forms an upper bow due to its own gravity, and the two sides of the paper are not flattened, which causes difficulty in paper transfer during printing, and often breaks. When the paper roll is not flat, the cardboard can be flattened, and the height of the paper roll should be adjusted frequently with the adjustment knob of the paper separation mechanism, so that the paper transfer is smooth and the printing process proceeds smoothly.
(4) The blades of the drying device are damaged due to long-term use, and some places are not synchronized with the operation of the main machine, which often causes the printed matter on the paper frame to be disordered. At this point, you should take your eyes and hands quickly, and immediately remove them from the bottom of the chaos. It is best not to make the ink film face opposite, so as not to cause defective or defective products.
Only by paying attention to every detail in the screen printing screen printing process, we can print good products, print beautiful prints, improve the yield, reduce the consumption and increase the efficiency, and make the enterprise in an invincible position in the market competition. .