The slitting and rewinding machine is a prepress and postpress equipment commonly used in papermaking machinery and printing and packaging machinery. It is mainly used to cut large rolls of paper, films, non-woven fabrics, aluminum foil, mica tapes and other thin materials into small rolls of different widths. The slitting and rewinding machine can also be used to inspect the quality of the products.
The traditional control scheme for the slitting and rewinding machine is to use a large motor to drive the shaft for receiving and discharging the rolls. The shaft is equipped with a magnetic powder clutch, and the resistance generated by the magnetic powder clutch can be controlled by adjusting the current to maintain constant tension on the material surface. The magnetic powder clutch and brake are special automation execution components. By filling the working gap with magnetic powder to transmit torque, the magnetic state of the magnetic powder can be changed by changing the magnetic current, thereby adjusting the transmitted torque. It can be used for stepless speed regulation from zero to synchronous speed, as well as for micro-adjustment of high-speed segments and small and medium power speed regulation systems. It is also used in the tension control system for unwinding or rewinding to ensure constant tension during the winding process by adjusting the torque using current.
The slitting and rewinding machine has continuously developed from single motor control to dual motor and triple motor control, which is more stable and efficient at higher machine speeds. The main feature of the slitting and rewinding machine is that the magnetic powder clutch serves as a resistance device, and an outputting DC voltage is controlled by the system to control the resistance generated by the magnetic powder clutch. Its main advantage is that it is a passive device that can control small tensions. The slitting and rewinding machine should be installed in a place with appropriate temperature, dryness, ventilation, good lighting, and convenient operation.
With the constant application of various new materials, the soft packaging market is developing rapidly. The increasing market demand and the development of special application fields have led to increasingly high requirements for cutting packaging materials, thus making it more demanding for the slitting and rewinding machine. When purchasing a qualified slitting and rewinding machine, the enterprise must not only meet some technical indicators, but also consider the following two factors:
Operational efficiency, mainly including equipment working speed, stability, and operating difficulty;
Economic performance, which refers to the applicable scope of the equipment for materials, processing limit size, equipment price, energy consumption, etc.
