What is the working principle of a film blowing machine?

The production process and principle of Dalian plastic blow molding machine add dried 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 threaded edge, the rotating edge generates a thrust perpendicular to the edge surface, pushing the plastic particles forward

During the transition process, due to friction between plastic and screw, plastic and barrel, as well as collision and friction between particles, and also due to external heating of the barrel, it gradually dissolves. 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.

There are many types of plastic blow molding machines, such as PE, POF, and so on. The application range of plastic blow molding machines is mainly determined by their different materials. For example, the film produced by PP blow molding machines is suitable for various supermarket shopping bags, mushroom bags, and other bags with high hardness and low requirements for stretchability and brightness. The film blown by high-pressure PE is suitable for various fresh-keeping bags, and the recycled film is suitable for making various garbage bags. Plastic blow molding machines are widely used in various industries.

When the discharge from the mold is uniform and consistent, you can wear gloves and slowly pull the tube blank. At the same time, close the end of the tube blank, slightly open the air inlet control valve, and put a small amount of compressed air into the center hole of the core rod. Then, carefully guide it through the stable foam frame and the herringbone plate, and thread it into the traction roller and guide roller until it is rolled (if you want to emboss, you need to pass through the embossing roller).

Used for blowing high and low pressure polyethylene, the product is widely used in composite films, packaging films, agricultural covering films, textiles, clothing bags or films, and other packaging; The main motor adopts frequency conversion speed regulation, which increases the stability of the host speed regulation and can save 30% electricity. The screw barrel is made of 38 chromium molybdenum aluminum, which has undergone nitriding treatment. The traction frame adopts a raised type, which can achieve optimal cooling effect regardless of whether the film is blown large or small.