Corrugated Box Printing Ink Frequently Asked Questions #6

Analysis of the reasons: This is caused by two aspects. One is that the gap of the feed roller (printing slot machine) is too small, lower than the thickness of the original paperboard, and the corrugated file is crushed before printing; the second is the printing roller during the printing process. Excessive pressure caused significant crushing of the corrugated area.

Solution: The gap of the feed roller should be determined according to the thickness of the corrugated board, which is basically 0.5mm lower than the thickness of the original board. If the gap is too small, the corrugated fiber will be destroyed, and the physical strength of the corrugated box will be affected. After the gap is too large, the cardboard cannot travel at a constant speed, resulting in inaccurate printing position. Pay attention to adjusting the gap between the printing roller and the embossing roller during printing. At present, most of the corrugated cartons use flexographic printing, and the printing methods use light pressure and kiss-type printing. The pressure must not be too great. If the pressure is too high, the corrugations in the printing area will be crushed and the carton performance will be affected. Therefore, the adjustment of the gap between the printing roller and the embossing roller is very important, and there is no significant depression in the printed part of the hand.

Corrugated box manufacturing process should not damage the corrugated, it is different from the general sales of carton packaging, because the corrugated force is a multi-faceted, once the destruction of UV-type corrugated, this corrugated is meaningless. In summary, these printing problems are only the most common problems. Others, such as the indistinct writing, distortion, excess printed traces after printing (commonly known as “printing”), streaking of printed marks, and the inability of ink colors to achieve desired results, have also been analyzed. However, in addition to objective factors, such as plate material, plate liners, inks, and even the quality of corrugated board, have a direct impact on the printing effect of corrugated boxes. Therefore, we must use high quality raw materials to ensure the high quality of printing. To solve various problems in the printing process, we must rely on experienced workers. First of all, they must have a certain level of theoretical knowledge, such as the need to understand the principles and procedures of printing equipment and manufacturing processes, and fully grasp the printing system. The relationship between the middle part of the rubber roller, the transfer roller (anilox roller), the plate roller, and the embossing roller can be solved quickly if there is a problem and how to adjust the corresponding part accurately. Secondly, we must also be good at summarizing in actual operations. Under what circumstances, which parts should be adjusted, and the requirements are accurate, this is not easy for general operators. As a good stop worker, we must be good at finding problems and solving problems in time so that production efficiency can be improved.

All in all, the printing problem cannot be separated from the various conditions mentioned above. As long as we fully understand the principle of printing, the printing problem will be solved.




Source: Corrugated boxes