Development history of slitting machines

Slitting machine is a pre-press and post-press equipment that cuts a large roll of paper, film, non-woven fabric, aluminum foil, mica tape and other thin materials into small rolls of different widths. It is often used in paper-making machinery and printing and packaging machinery.
In the past, the speed of the magnetic powder clutch of the slitting machine could not be high, because it would easily cause high-speed friction of the magnetic powder during operation, generate high temperatures, shorten its life, and in severe cases, it would jam, hindering the operation of the machine, which would bring serious consequences to production.
Seriously affected production efficiency. Nowadays, double frequency conversion motor control is adopted, so that when the diameter of the winding material becomes larger, the frequency conversion motor control is used to keep the magnetic powder friction at a certain value. There will be no high temperature.
The traditional control scheme of the slitting machine is to use a large motor to drive the rewinding and unwinding shaft. A magnetic powder clutch is added to the retracting and unwinding reel. The resistance generated by the magnetic powder clutch is controlled by adjusting the current of the magnetic powder clutch to control the surface tension of the material. . Magnetic powder clutches and brakes are special automated actuators that transmit torque through magnetic powder filled in the working gap. Changing the magnetic current can change the magnetic state of the magnetic powder, thereby adjusting the transmitted torque. It can be used for stepless speed regulation from zero to synchronous speed, and is suitable for high-speed fine-tuning and small and medium-power speed regulation systems. It is also used in unwinding or rewinding tension control systems that adjust torque by adjusting current to ensure that the tension remains constant during the winding process.
Slitting machines continue to develop from single motor control to dual motors and three motors, which are more stable and efficient when the machine speed is faster.
The main feature of the slitting machine is that the magnetic powder clutch acts as a resistance device 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 a passive device and can control small tensions.
Disadvantage: The speed cannot be high. When running at high speed, it is easy to cause high-speed friction of magnetic powder and generate high temperature, causing the magnetic powder clutch to heat up and shorten its life. A device used to cut a roll of a certain width longitudinally with a knife into several narrower rolls. After it is installed in a unit device such as a calender, extruder, or glue coating machine, it can complete continuous cutting, often with a winding device. The cutting knives can be flat knives or round knives.
Paper processing machinery slitting machine series products: paper slitting machine, small paper slitting machine, web slitting machine, high-speed slitting machine, etc.
Metal processing machinery slitting machines: strip slitting machines, copper plate slitting machines, aluminum plate slitting machines, stainless steel slitting machines, tinplate slitting machines, etc.