Overview of stretch film slitting rewinding machines

PE stretch film, also known as cling film, is a type of self-adhesive and stretchable plastic film, which is produced through single-sided salivation or double-sided blow molding technology. It can compact goods into a whole due to its adhesive and rebound properties between film layers, and has the function of dust and moisture prevention. The stretch film rewinder slitter machine integrates multiple functions such as cutting and rewinding, which is mainly used to cut stretching films with large widths into several film rolls with small widths and correct the misalignment of rolls, greatly improve the flatness and appearance quality of membrane rolls.

Types of stretch film slitting rewinding machine

1) Semi-automatic rewinding slitting machine. Simultaneously possess slitting and rewinding functions, simple structure, easy operation, and convenient troubleshooting. The control system generally based on human-machine touch interface and PLC controlling system, configured with a main motor, a flipping motor, and a set of frequency converter control system. On unwinding end, use a magnetic powder brake to control torque for tension control, and Functional requirements include flexible adjustment of operating time, speed and accurate meter measurement. Manual replacement of paper cores, manual slicing, manual loading and unloading process. In addition, the rewinding stations can be increased according to needs to improve the winding efficiency, and the speed ratio can be changed by replacing different gears to stretch the film into various widths and thicknesses, realize the pre-stretching function.

2) Fully-automatic rewinding machinery. Mainly rewind the mother rolls with a large diameters into several finished rolls with smaller diameters. The characteristics include high degree of automation, faster speed and higher working efficiency. Equipped with automatic feeding paper tubes, automatic unloading, automatic shaft changing, automatic horizontal slicing, etc. Together with conveyor belts, it can synchronously complete machine operation and the packing process of finished rolls. Significantly reduce labor cost, even a single person can handle the operation of several machines. In addition, humanized protection functions such as automatic shutdown due to film breakage, shutdown due to no paper core on clamp, which can effectively eliminate safety hazards, save energy consumption and ensure the safe and reliable running of equipment.

Working principle of stretch film slitter rewinder machine

Comparing to conventional slitting rewinding machines, the running process of PE stretch film slitter rewinder is relatively simple, which mainly includes three stages: unwinding, cutting, and winding. Firstly, the unwinding air shaft smoothly unfolds the cline film of the mother roll, and maintains stable operation through a tension control system to avoid misalignment and stretching deformation caused by fluctuation of tension. The slitting system generally uses razor blades which is mounted on the cutter shaft and the spacing can be set based on required specifications. The cline film with high speed is accurately cut into narrow strips and enters into following winding process. The winding mechanism generally adopts clamping chuck which is easy for loading and unloading. Two paper tubes are fixed on the winding chuck, and one pressure roller is tightly pressed against film material on paper core for surface driven winding. This method can effectively eliminate air between the film layers, reduce the generation of bubbles and wrinkles, until the whole process is complete. Besides, in rewinding mode, the upper and lower shafts adopt alternating winding and perform loop working by flip motor, improve production efficiency. The overall design requires solid materials for wallboard, stable operation. The speed of rewinding and unwinding is synchronized to prevent excessive stretching or loosening issues on material.

Application fields of stretch film rewinding slitting machinery

The stretch film rewinder slitter machine can efficiently customize the rewinding and cutting treatment for stretch film, aluminum film, cling film, paper and other materials. Whether used for cargo wrapping and fixing, or protection and isolation, even for the production of environmentally friendly biodegradable cline films, the precise rewindre slitter machinery is indispensable. It has gradually become a key equipment in many industries such as food, logistics, electronic production, building materials, chemical engineering, etc. With the advancement of technology and the continuous development of market demand, the future stretch film slitting rewinding machines will develop towards higher precision, intelligence, energy conservation and environmental protection, continuously promote technological innovation and industrial upgrading in packaging industry.