Don't underestimate, the accuracy of gravure printing press depends on it.
First of all, there are so many transfer guide rolls (feeding guide rolls):
Numerous feeding guide rollers not only require flexible rotation, but also require good dynamic and static balance treatment. It is conceivable that if each of the guide rolls gives a little resistance to the passing printed matter, it is difficult to ensure the accuracy of the printed matter due to the asynchronous resistance and static electricity generated during the printing of the printed film.
Second, it is the tension control part:
The discharge part needs to be unwinding: the film roll has a small tension, and the film roll has a small tension; the receiving part requires that the film roll has a small tension and the film roll has a large tension. That is, the tension of the discharge film is small when the film is unwound, and the tension is gradually increased as the film roll is reduced. When the film is unwound, the tension is small, and as the film roll increases, the tension gradually increases.
When printing in a soft pack factory, the film must always maintain the same tension. Because the tension of the film is stable when the material is discharged, the tension of the film is stable, and the printed matter will not run the plate, so as to maintain the accuracy of the plate.
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