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Solutions to Electrostatic Faults in Flexographic Printing

release time:2018-03-26 15:27:12  Views:

Static electricity refers to the static electricity generated in high-speed start-up production. Once static electricity occurs in thin paper products, it will cause great trouble for the next cutting process. After the paper is die-cut, the finished product often goes down close to the bottom roll, sometimes falls down, sometimes just stuck between the bottom roll and the front end of the paper-collecting table. When it falls down, it will cause a small amount of waste. If the paper is stuck, it will be shut down and disposed of. It is easy to cause waste. The main reasons for the above problems are: the stiffness of the paper itself is poor, and it is easy to generate static electricity. The solution is to install an effective electrostatic removal device in front of the die-cutting unit, and to install a thin steel sheet fixed on the surface of the paper roll at the front end of the paper-collecting table to ensure a tight seam. Sometimes, thin paper products will fly up together with die-cutting rolls on the receiving table. The main reason is that the polishing oil is not cured thoroughly and slightly sticky. At this time, only the curing performance of polishing oil needs to be improved. The sponge lining of die-cutting can be replaced frequently or a small amount of talcum powder can be added. It is necessary to add less work, and the most fundamental thing is to ensure that the polishing oil is completely cured and not sticky.

Die cutting and paper collecting are alignment problems. It should be said that the tension control of unit flexo press is much easier when printing thin paper than when printing cardboard. According to many years of experience, if the front overprint is better and the die cutting deviation is larger, the overprint is inaccurate mostly because the back tension is too large or inappropriate. So now most flexographic presses are equipped with computer automation system, it needs to be emphasized that different roll design input is also different, there is a habit of recording data.

Die cutting and paper collecting are alignment problems. It should be said that the tension control of unit flexo press is much easier when printing thin paper than when printing cardboard. According to many years of experience, if the front overprint is better and the die cutting deviation is larger, the overprint is inaccurate mostly because the back tension is too large or inappropriate. So now most flexographic presses are equipped with computer automation system, it needs to be emphasized that different roll design input is also different, there is a habit of recording data.


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