Types and application of tension control in the printing process of gravure printing machine

1. Several factors affecting the tension control of the gravure printing machine

The tension control system of the gravure printing machine is essentially a special follow-up system whose input quantity changes according to some adjustable attenuation law. Tension control 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 scrap rate of the gravure printing machine can be easily controlled.

Therefore, to ensure the quality and efficiency of gravure printing must be equipped with a fully functional tension control system. However, in the printing process, the factors that cause fluctuations and changes in the tension of the gravure printing machine are often more complicated. The main influencing factors are roughly as follows:

1. During the winding and unwinding process of the gravure press material roll, the winding and unwinding diameters are constantly changing, and the change in diameter must cause a change in the belt tension. When the braking torque is constant, the diameter decreases and the tension will increase accordingly. Rewinding is the opposite. 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 printing machine, and is also one of the main factors that cause the tension of the tape to change.

2. There are deviations in the manufacturing accuracy and assembly accuracy of the main components of the gravure printing machine such as the base, wallboard, and guide rollers. For example, the flatness and straightness of the base assembly, the verticality of the wall panel and the base assembly, the horizontality of the assembly of the plate rollers and guide rollers, and the parallelism between them, their respective runout deviations, mass dynamic and static balance deviations, etc. Etc. are very strict. Otherwise, when the material belt runs on the plate roller and many guide rollers, the tension on the material belt will change slightly. 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 transmission system of the gravure printing machine should achieve precision transmission without gaps to ensure that the plate rollers of each printing unit run synchronously. If the transmission synchronization error is caused during the printing process, the tension of each printing unit is bound to be Make a difference.

3. The unevenness of the inner material of the material belt. Such as the fluctuation of the elastic modulus of the material, the change of the thickness of the material along the width and length, the eccentricity of the material roll, and the change of the temperature and humidity of the production environment, will have a subtle effect on the fluctuation of the tension of the whole machine.

4. In the process of automatic feeding and changing without stopping the gravure printing machine, the feeding and cutting will make the original tension of the whole machine suddenly produce disturbance changes. The higher the speed of the device, the greater the interference. At this time, the tension control system should be able to quickly and automatically adjust randomly according to the tension interference of the material belt, so that the tension can be restored to the original stable state in time.

In short, it is similar to the vertical advertising machine. iIt can play ads and shoes.


It uses electronic ultra-white tempered glass with a transmission rate of 95%, beautiful interactive color, excellent image quality, 3D surround sound, and full-featured remote control operation. Used in government companies, hotels, restaurants,street etc.



24

Self-Service Shoe-Polish Kiosk

Shoe polishing digital signage,Shoe polishing machine,Shoe polishing advertising player,Phoe polishing lcd display

Guangzhou Sosu Electronic Technology Co., Ltd. , https://www.sosuchina.com