How to avoid printing problems in debugging?
Some skills to improve your Flexo Printer Slotter performance.
It is really useful! Try This!
When debugging a printing press, are there always those kinds of problems that are common? Pay attention to the following points to avoid many common printing problems during debugging.
1. Adjust the printing plate pressure to zero:
Hanging the plate (preferably full-page), and slowly reduce the gap between the anilox rollers, 90% of the inking area is the zero of plate pressure. If the pressure is too great, the backside of the printing surface will become irregular.
How to adjust the printing pressure to zero: Take double wall of flute B as an example, slowly reduce the gap between the printing plates, and ensure that 90% of the entire printing area is inked. At this time, the electronic control value minus the thickness of the cardboard means that the printing pressure is zero. In normal operation, the printing pressure is about 0.2-0.5 mm lower than that of cardboard.
Note: This gap needs to be calibrated once a month.
2.The principle of printing feeding roller adjustment:
the same as printing pressure adjustment.
In principle, the thickness of the cardboard should not be reduced by more than 5% during the production process, otherwise it will seriously affect the compression of the carton.
During the process of production, when the printing press was accelerating, if the cardboard is overall running dislocation, the pressure of the pull rolls should be increased, and the printing pressure should be increased from the back to the front, otherwise the printing blanks will be occurred.
3.Adding transition plate to solve slotting run-off problem:
In the production process, the cardboard without downward warping often appears slotting run-off, the main reason is the transition from the last color of cardboard to slotter entrance is not good, so that the cardboard will hit the lower slotting knife. Problem can be solved by adding transition plate.
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