Tension Control For Gravure Press

The manufacturing precision and assembly precision of the main components of the gravure printing machine such as the base, the wall panel, the guide roller, etc. are deviated, and the transmission synchronization error is caused during the printing process, which is bound to change the tension of each printing unit, and the gravure printing machine is wound up. During the unwinding process, the winding and unwinding diameters are constantly changing. The change in diameter must cause the tension of the belt to change. When the braking torque is constant, the diameter is reduced and the tension will increase. .
Tension control must be effective for any speed of the machine, including acceleration, deceleration and uniform speed of the machine. It also has the ability to ensure that the belt does not break. The manual gravure control system of the modern gravure press has been basically eliminated.

Closed-loop automatic tension control is to directly measure the actual tension value of the material belt by the tension sensor. By comparing this signal with the preset tension value of the controller, the control signal is calculated. Due to the higher printing speed and production process, higher requirements are placed on the tension control, making the magnetic powder clutch incapable of being the executive unit of such a system.

The tension control is stable, the tension change is small, and the color registration accuracy and reject rate of the gravure printing machine are easily controlled. The tension control system of the gravure printing machine is essentially a special kind of input quantity that changes according to an adjustable attenuation law. Dynamic system, fluctuation of material elastic modulus, material thickness variation along the width and length, etc., the quality of the coil is eccentric, and the temperature and humidity of the production environment change, which will have a subtle effect on the tension fluctuation of the whole machine. In the process of automatic refueling without stopping the machine, the material receiving and breaking will cause the sudden tension of the original machine to suddenly change.

Magnetic powder brakes and magnetic powder clutches are widely used in papermaking, printing, plastics, rubber, textile, printing and dyeing, wire and cable, metallurgy, tablet presses and other related winding and winding tension control, tension control means The ability to permanently control the tension of the tape as it is transported on the device.发送反馈