What are the technical parameters of a three-layer co extrusion blown film machine?

As an advanced plastic film production equipment, the three-layer co extrusion blown film machine has been widely used in various fields such as packaging, agriculture, healthcare, and construction due to its multifunctionality, efficiency, environmental friendliness, and flexibility. With the continuous advancement of technology and the growing market demand, three-layer co extrusion blown film machines will play a more important role in the future, promoting the development and innovation of the plastic film industry.

The three-layer co extrusion blown film machine is widely used in fields such as food packaging, pharmaceutical packaging, and daily chemical product packaging. By compounding different materials, packaging films with excellent barrier properties, heat sealing properties, and impact resistance can be produced. Used for producing agricultural films, such as greenhouse films, mulching films, etc. Multilayer composite film has excellent weather resistance, aging resistance and heat preservation performance, which can effectively improve the yield and quality of crops.

What are the technical parameters of a three-layer co extrusion blown film machine?

Extrusion system parameters

Screw diameter: generally expressed in millimeters (mm), commonly including 40mm, 45mm, 55mm, 60mm, etc.

Screw aspect ratio: refers to the ratio of the effective length to the diameter of a screw, such as 28:1, 30:1, 35:1, etc.

Screw speed: Unit: revolutions per minute (r/min), usually in the range of 10-150r/min.

Maximum extrusion capacity: measured in kilograms per hour (kg/h), small equipment may produce tens of kilograms per hour, while large equipment can produce over 100kg per hour.

Main motor power: measured in kilowatts (kW), depending on the size of the equipment and production requirements, the power generally ranges from 11kW to 30kW or even higher.

Film forming parameters

Thin film to large bending diameter: refers to the maximum width of the film after unfolding, measured in millimeters (mm). Common sizes include 1100mm, 1300mm, 1600mm, 1800mm, etc.

Film thickness: generally between 0.012mm and 0.15mm.

Mold size: The size of the discharge port of the mold head, usually expressed in millimeters (mm), such as ￠ 150, ￠ 200, etc.

Traction and winding parameters

Maximum winding diameter: refers to the maximum diameter of the film roll after winding, measured in millimeters (mm), commonly 500mm.

Maximum winding speed: measured in meters per minute (m/min), typically between 30-60m/min.

Traction speed: It matches the winding speed and is usually adjustable within a certain range, measured in meters per minute (m/min).

Electrical and power parameters

Total installed capacity: measured in kilowatts (kW), reflecting the overall electrical power demand of the equipment, with a value ranging from 250kW to 320kW.

Heating power: The power used to heat the barrel and die, measured in kilowatts (kW).

Overall parameters of the equipment

Dimensions: expressed in length x width x height (mm), such as 10000 x 5800 x 9500mm, 2810 x 2130 x 2015mm, etc.

Machine weight: measured in tons (T) or kilograms (kg). Small equipment may weigh 1-2 tons, while large equipment can weigh 30-40 tons.

The core working principle of the three-layer co extrusion blown film machine is to heat and melt plastic raw materials of different materials through three independent extruders, and then extrude the three layers of molten materials simultaneously through the co extrusion die to form a tubular film. Subsequently, the tubular film is blown into a cylindrical shape through a blown film process, and then subjected to cooling, traction, winding and other processes to finally form a multi-layer composite film.

The three-layer co extrusion blown film machine is equipped with advanced control systems, including PLC controllers, touch screens, sensors, etc., which can achieve precise control of process parameters such as extrusion temperature, extrusion speed, blown film pressure, and traction speed, ensuring the stability of the production process and consistency of product quality.