Several Factors Affecting The Automatic Tension Controller Of Gravure Press

The automatic tension controller system of the gravure press is essentially a special follower system in which the input amount changes according to an adjustable attenuation law. The control of tension can be said to be the core of the whole machine control. As long as the tension control is stable and the tension change is small, the color registration accuracy and the reject rate of the gravure printing machine are easily controlled. Therefore, in order to ensure gravure quality and efficiency, a fully functional tension controller system must be provided. However, in the printing process, the factors that cause the tension and variation of the gravure press tension are often complicated, and the main influencing factors are as follows:

1. During the process of receiving and unwinding the gravure printing machine, the winding and unwinding diameters are constantly changing, and the change of the diameter must cause the change of the tension of the material belt. When the unwinding torque is constant, the diameter is reduced and the tension is increased. The winding is reversed. If the winding torque is constant, the tension will decrease as the winding diameter increases. This is determined by the inherent characteristics of the gravure press and is one of the main factors that cause the tension of the tape to change.

2. The unevenness of the material inside the material. Such as the fluctuation of the elastic modulus of the material, the thickness of the material varies along the width and length, the eccentricity of the material roll, and the temperature and humidity changes in the production environment will have a subtle effect on the tension fluctuation of the tension controller.

3. During the automatic refueling process of the gravure printing machine, the material feeding and material cutting will cause the original tension of the whole machine to suddenly produce interference changes. The higher the speed of the equipment, the greater the interference. At this time, the tension controller system should be able to quickly and randomly adjust according to the tension of the belt tension to restore the tension to the original stable state in time.

4. The manufacturing precision and assembly precision of the main components of the gravure printing machine such as the base, the wall panel, and the guide roller are different. For example, the flatness and straightness of the base assembly, the verticality of the assembly of the wall panel and the base, the level of assembly of the various rollers and guide rollers, and the parallelism between them, their respective runout deviations, mass dynamic balance deviations, etc. Etc., all requirements are very strict. Otherwise, the tension on the strip will change slightly as the strip runs on the plate roll and the many guide rolls. Eventually it will be reflected on the entire machine, resulting in irregular changes in tension. In addition, the gears and reduction gearboxes in the main drive system of the gravure printing machine should be driven without gaps to ensure the synchronous operation of the plate rollers of each printing unit. If the transmission synchronization error is caused during the printing process, the tension of each printing unit will be inevitable. Make a difference.