The slitter is used very frequently. It can cut a wide sheet of paper or film into a uniform paper or film. Some paper machines or printing machines use a slitter. The slitting machine mainly drives the shaft of the rewinding and unwinding by the internal motor, and puts the magnetic powder clutch on the shaft, and adjusts the resistance generated by changing the current of the clutch to change the tension of the machine.
Magnetic powder clutches and brakes are special automatic actuators that transmit torque through magnetic powder filled in the working gap. By changing the excitation current, the magnetic state of the magnetic powder can be changed, and the transmitted torque can be adjusted. It can be used for stepless speed regulation from zero start to synchronous speed. It is suitable for high speed section fine adjustment and medium and small power speed control system. It is also used to condition the torque with a conditioning current to ensure a constant unwinding or rewinding tension control system during winding.
The main characteristic of the slitter is that the magnetic powder clutch is installed as a resistance, and is controlled by the system to output a DC voltage to control the resistance generated by the magnetic powder clutch. The main advantage is that it is passively mounted and can control small tensions.
The main drawback is that the speed cannot be high, and high-speed friction of the magnetic powder is easily formed during high-speed operation, and high temperature is generated, and the magnetic powder clutch is heated to shorten its life. The cutter is used to stop the longitudinal cutting of a certain width of the coil and cut into several narrow-cut sub-rolls for installation.
After being installed in a calender or an extruder or a gluing machine, the continuous cutting can be completed, often with a winding installation. The knife can be used with a flat knife and a round knife.