Introduction to the winding process of Dalian blown film unit

The processing flow of the blow molding machine is to add dry polyethylene particles to the feeding hopper, and rely on the weight of the particles themselves to enter the screw from the hopper. When the particles come into contact with the inclined edge of the thread, the rotating inclined edge generates a thrust perpendicular to the inclined edge of the plastic, pushing the plastic particles forward. During the pushing process, due to the friction between the plastic and the screw, plastic and the machine barrel, as well as the collision and friction between the particles, At the same time, it gradually dissolves due to external heating of the material barrel. The molten plastic is filtered by the machine head to remove impurities and comes out of the mold mouth. It is cooled by an air ring, blown and expanded through a herringbone board, pulled by a roller, and rolled into a cylinder to roll the finished film.

The maintenance and upkeep of the film blowing machine is very important. Running the film blowing equipment at full load can cause significant damage to the machine body. If the machine body is not maintained and upkeep in a timely manner, it is easy to encounter problems in the long run.

Introduction to the winding process of Dalian blown film unit

1. Throughout the entire winding process, the tension must remain constant without the need for manual adjustment.

2. When starting the empty coil, the tension should not be too high to prevent the film from wrinkling. The tension should not be too low during full roll operation to prevent the film from becoming too loose.

3. The system is responsive and can be quickly adjusted according to changes in speed and tension during acceleration and deceleration, ensuring constant tension.

4. It is necessary to quantify the tension, that is, the tension can be set according to the process requirements of different film production.

A film blowing machine is a machine that heats and melts plastic particles before blowing them into a thin film. There are many types of blow molding machines, including PE, PP, PVC, multi-layer co extrusion blow molding machines, and the fully biodegradable material PLA+PBAT blow molding machines that have emerged in recent years. The film blowing machine mainly consists of an extruder, a die head, a cooling device, a stable foam frame, a herringbone plate, a traction roller, a coiling device, etc.

As a film blowing machine, due to the inherent characteristics of its product technology, plastic film blowing machinery basically operates non-stop 24 hours a day. Full load operation of the film blowing equipment causes significant damage to the body. If the film blowing machine is not maintained and serviced in a timely manner, it will have an impact on the service life of the machine, the accuracy and quality of film products.