We are Manufacturer, Supplier and Exporter of Two Layer Blown Film Extrusion Machine in Ahmedabad, Gujarat, India. The creation of different plastic films used in packaging, agriculture, construction, and many other industries relies heavily on two-layer blown film extrusion machines. These devices comprise of a primary pusher that feeds the polymer resin into a circular die after its melting and extruding it. A molten plastic tube is created by the die and then inflated with air to create a bubble. As the bubble rises, it gets stretched and cooled, and when it finally leaves the machine, it collapses and flattens into a two-layer film.

The film's two layers can provide barrier qualities, strength, or visual appeal, among other functions. Polyethylene, polypropylene, and ethylene vinyl alcohol (EVOH), which has barrier qualities against moisture and oxygen, are all common materials for the layers. For the film to have the appropriate qualities of thickness, strength, and clarity, controlled cooling is essential. The film may go through extra processes like printing or corona treatment after cooling, and then it will be wrapped into rolls for shipping or additional processing.

Features of Two Layer Blown Film Extrusion Machine

  • Extruders: There are two or more extruders in two-layer blown film extrusion machines. Pellets of plastic resin are melted by each extruder, and the molten plastic is then pumped through a die head. Usually, one extruder works with the material in the inner layer and the other with the material in the outer layer.
  • Die Head: The die head is a critical component where the molten plastic from the extruders is combined and shaped into a tubular form. It determines the thickness and width of the film being produced.
  • Air Ring: The bubble of molten plastic that emerges from the die head is stabilized and cooled using an air ring. It keeps the bubble from collapsing and aids in maintaining constant thickness.
  • Nip Rolls: The tubular bubble comes out of the cooling ring as a flat film, which is flattened with nip rollers. They also manage the movie's pacing and suspense.
  • Take-Up Unit: The film is pulled away from the extrusion line by the take-up device at a certain rate. The film is supported and guided while being wound into a roll by rollers or belts.
  • Thickness Control System: A height control system is frequently used in two-layer blown film extrusion machines, which ensure consistent thickness of both layers across the film's breadth. This could entail continually modifying the die spacing or the extruder output.
  • Winder: The resulting film is rolled into rolls with a specified diameter and length in the winder, the last part of the extrusion procedure. Features like tension leadership and controlled roll change might be included.
  • Temperature Control: Achieving the proper fluidity for extrusion and dissolving the plastic resin pellets need precise control of the temperature. Temperature control systems are commonly found in die heads and per extruder in two-layer blown film extrusion machines.
  • Control System: A system of controls with a human-machine interface (HMI) is a common feature of modern machines. It allows for tracking and modification of numerous parameters, including temperature, speed, thickness, and production rate. Additionally, certain devices might be capable of remote diagnosis and monitoring.
  • Safety Features: Protecting operators from moving parts, hot temperatures, and cutting edges requires the use of safety measures such as interlocks, emergency stop buttons, and guards.

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