Gravure aluminum foil overprint, how to control the tension

2017/3/15 11:09:10

In the process of overprinting of gravure aluminum foil, tension adjustment and change directly affect the accuracy of overprinting and printing, printing process control is one of the key factors. Gravure aluminum foil overprint, how to control the tension? This article to help you solve.

1, because the printing presses in the rolling and unwinding process, the volume of the roll is constantly changing. Unloading in the case of constant braking torque, the diameter decreases, the tension increases, the rewinding is the opposite; if the winding torque does not change, with the winding diameter increases, the tension will be reduced. This is the inherent characteristics of the press determined, but also caused by aluminum foil tension changes in the main factors.

2, the uneven quality of aluminum foil material, affecting the tension changes, such as material elastic modulus fluctuations, the thickness of the material along the width of the length of change, the volume of eccentricity, and the level of heating will give the machine tension Bring subtle influence.

3, the press in the refueling or material breakage process will make the original machine has a stable tension suddenly produce interference changes. Equipment, the higher the speed, the greater the interference, tension changes, poor stability. Should be quickly according to the tape tension interference automatically adjusted to make the tension in time to restore the original stable state. In the overprint on the printing of the coil in the transmission should have a moderate tension, tension is too small, the test room in the membrane prone to jitter, affect the accuracy of overprint, the tension should be constant to ensure that the instantaneous linear speed constant, and requires the main motor running To be smooth, can not be fast when the slow, can not tremble, otherwise affect the accuracy of overprint.