Ink printing process failure of circular die-cutting machine
The position and accuracy of the plate roller of the multi-color printing slotting machine itself, the adjustment of the feeding roller and the traction roller, the use of the traction belt, the accuracy of the printing plate arrangement and the warping of the cardboard will all have a direct impact on the overprinting effect. To solve the problem of inaccurate overprinting of multi-color printing, first of all, the pressure of the plate roller of each color should be slightly larger than the previous one, so as to make the pressure applied on all colors equal; The roller squeezes the printing plate (referring to the flexographic plate) to deform, so the gap between the two rollers should be increased and the pressure should be reduced accordingly; to solve the problem of printing leakage, the gap and pressure between the plate roller and the embossing roller should be adjusted. Because the gap between the plate roller and the embossing roller is too large, the printing of a large area will produce inaccuracy, which requires increasing the down pressure. In addition, the quality of printing plate unevenness, plate lining, and printing plate hardness will affect the above problems, and local adjustments should be made.
The problems in the ink printing process of corrugated boxes should be solved in time to ensure the efficiency and value in use, not to delay normal production and life, and to ensure the quality in actual use. There will be certain problems in the ink printing process of corrugated boxes. The printed food will have certain ghosting and white leakage, which will lead to quality problems in different cartons produced. The reason for this problem is obvious. It is the printing machine. If there is a certain failure, analyze it according to a certain way and method, and carry out good maintenance and repair on it to ensure that the problem can be solved. Print ghosting and dropouts. These are two problems that often arise in the production process. The ghost around the printing pattern or text is caused by the excessive pressure between the anilox roller and the printing plate; the ghost at the front edge of the printing is caused by the excessive pressure between the printing cylinder and the embossing roller; The area printing through the bottom and white leakage is also caused by insufficient pressure of the printing roller and the embossing roller. To solve the problem of printing ghosting, the gap and pressure between the anilox roll and the plate roll should be adjusted. Secondly, pay attention to adjusting the gap and position of the feeding roller and pulling roller at the front and rear of each printing press, especially when the width of the board is too narrow. In case of partial color registration, two traction belts should be added to the edge of each printing plate to ensure the smooth transition of the cardboard during the printing process; in addition, due to the different warpage of the corrugated cardboard, the cardboard should be replaced if necessary.