Characteristics of blown film machines

Blown film machine is the current domestic market for our common plastic bags for the production and development of machinery, it is the plastic particles can be heated and melted and then blown into film. Blown film machine is divided into a variety of PE, POF, PVC and so on. Today, Xianjie net editor will take you orientation analysis to understand the blown film machine, for you to introduce the detailed design of the blown film machine, the basic principle of work, the structure of the important components, the main features of performance, the main points of the purchase, the operation of the technical regulations and inspection and maintenance services.
        Principle of blown film machine
        Blown film machine is a common plastic packaging machinery, its working principle is simply polyethylene, PVC, polyethylene and other plastic particles into the raw material hopper of the blown film machine, plastic particles due to their own gravity from the raw material hopper into the screw nest. When the raw material particles are in contact with the threaded bevelled edge, the rotating screw and the raw material particles and their relative thrust, thus pushing the plastic particles forward, and the plastic particles are gradually melted due to the conflict between the plastic and the screw, the plastic and the barrel, the collision and friction between the particles, and the external heating of the barrel.
        The melted plastic is filtered by the head to remove impurities, and then comes out from the mould mouth of the head, cooled by the wind ring, blown up by the herringbone plate, and hauled by the rollers, and wound into a coil to form a tube.
        Main features of film blowing machine
        1, blown film machine group is suitable for blowing low density polyethylene and linear density low polyethylene and plastic for film, widely studied and applied in our country food, clothing, textiles, daily necessities and other civilian goods and industrial products packaging. Raw materials need to go through different formulation technology can improve the production of pearlescent film, degradation film.
        2. Screw and barrel are made of 38CRMOAL, nitriding treatment, precision machining, high hardness, corrosion resistance, durable.
      The die head is plated with hard chrome, the structure is spiral mandrel type, the melt is extruded evenly, the blown film is smooth, the structure of the air cooling device is labyrinth type, the air out is even.
       4. The winding device adopts pressure friction winding or centre winding, which is regulated by torque motor, smooth winding and easy to change.
        Operation procedure of film blowing machine
        1）Preparation work
        1, check whether there is moisture between the blowing resin, moisture content shall not use more than 0.3%, and shall not be in the raw materials can be mixed with debris.
        Before starting the car should open the cooling water valve, so that the feeding device cooling, and check whether the water circuit is flat.
        3. Whether the lubricating oil of reducer is added to the baseline of oil level meter, whether the cooling fan system is intact, and whether the feeding device is normal.
        4. Whether the internal control of the wind ring is cleaned, whether the centre position information is consistent with the centre of the mould, and whether the air output can be even.