During the aluminizing process, the film will undergo high-temperature treatment, and aluminum atoms will be evaporated and deposited on the PET film in a vacuum state to form a thin metal coating. During this process, the film will absorb a lot of heat, causing its temperature to rise. If it is not cooled in time, the film may be deformed due to excessive heat, affecting the final quality and application effect. Therefore, the aluminized film will immediately pass through the cooling roller, and the low temperature of the roller body will quickly take away the heat on the film, causing its temperature to drop rapidly, thereby avoiding thermal deformation.
After cooling, the film has stabilized its morphology and performance. At this time, key indicators such as the film's surface tension, thickness uniformity, and adhesion of the metal coating have reached the best state. This provides a good foundation for the subsequent winding operation, ensuring that the film after winding can maintain its original quality and performance.
The winding section is the last process of the double-sided corona treated aluminized PET film production line, and it is also a key link to ensure the quality and flatness of the film. The winding section is usually composed of a series of precise mechanical devices, including a winding motor, a tension control system, a deviation correction device, etc. These devices work together to ensure that the film maintains constant tension and position during the winding process to avoid wrinkles or deflection.
Winding motor: The winding motor is the core power source of the winding section, responsible for driving the winding shaft to rotate and winding the film into a tube. In order to ensure the uniformity and stability of the winding, the winding motor usually adopts a high-precision servo motor with the characteristics of fast response speed and high control accuracy. By accurately controlling the speed and torque of the motor, the winding speed and tension can be accurately adjusted.
Tension control system: The tension control system is the key to ensuring that the film maintains constant tension during the winding process. It usually consists of a tension sensor, a tension controller and an actuator. The tension sensor monitors the tension changes of the film in real time and transmits the signal to the tension controller. The tension controller achieves precise control of the film tension by adjusting the output force of the actuator (such as a brake or clutch) according to the preset tension value. Through the precise adjustment of the tension control system, it can be ensured that the film will not break due to excessive tension during the winding process, nor will wrinkles be generated due to too little tension.
Deviation correction device: The deviation correction device is the key to ensuring that the film maintains a constant position during the winding process. It usually consists of sensors, controllers and actuators. The sensor monitors the position change of the film in real time and transmits the signal to the controller. The controller adjusts the output force of the actuator (such as a cylinder or a stepper motor) according to the preset position value to achieve precise adjustment of the film position. Through the precise adjustment of the deviation correction device, it can be ensured that the film will not be deflected or wrinkled due to position offset during the winding process.
In order to ensure the quality and flatness of the double-sided corona-treated aluminum-plated PET film during the winding process, in addition to relying on precise mechanical devices, the winding process needs to be optimized and improved. The following are some common optimization measures:
Choose a suitable winding speed: The winding speed is one of the important factors affecting the quality and flatness of the film. Too fast a winding speed may cause excessive tension in the film, thereby increasing the risk of breakage; while too slow a winding speed may cause wrinkles in the film during the winding process. Therefore, it is necessary to select a suitable winding speed based on parameters such as the thickness, width and adhesion of the aluminum layer of the film.
Adjust the tension control parameters: The tension control parameters are one of the key factors affecting the film winding effect. By adjusting the preset value of the tension controller, the film tension can be precisely controlled. In the actual production process, the tension control parameters need to be repeatedly debugged and optimized according to the material, thickness, and winding speed of the film to ensure that the film maintains a constant tension during the winding process.
Optimize the deviation control strategy: The deviation control strategy is one of the key factors affecting the flatness of the film winding. By optimizing the deviation control strategy, the film position can be precisely adjusted. In the actual production process, the deviation control strategy needs to be repeatedly debugged and optimized according to the width, thickness, and winding speed of the film to ensure that the film maintains a constant position during the winding process.
Strengthen equipment maintenance and maintenance: Equipment maintenance and maintenance is the key to ensuring the long-term stable operation of the winding section. Regularly inspect and maintain key components such as the winding motor, tension control system, and deviation correction device, and timely detect and eliminate potential faults to ensure that the equipment operates in the best condition, thereby improving the winding quality and flatness of the film.
