The main structure of three-layer co-extrusion film blower is mainly composed of extruder, head, die, cooling device, foam holder, herringbone, traction roll, coiling device, etc. Extruder, the Extruder mainly consists of screw, barrel hopper, deceleration and drive motor, the drive motor uses electromagnetic speed control motor (also can use frequency conversion common motor).

Drive the decelerator by belt drive to rotate the screw in the barrel. The plastic melted in the hopper plastic particles heated externally is extruded from the die through three-pass filter: three-pass, which consists of a filter, a filter plate and a three-way pressure cover. Die head: Cooling device, consisting of cooling air ring, air duct, blower, etc.

Traction is composed of traction rack, herringbone, traction roll, coiling mechanism and traction motor. Electrical control part, general unit is equipped with unit operation cabinet. The main button pushes through the main power supply and turns on the main switch of the motor. The main body and three connections can be controlled by the button switch, and the electric heat of each button of the moulds can be controlled separately. Thermocouple automatic temperature measurement and automatic temperature control are used for the key two groups of coils.

In normal production process, temperature can be automatically controlled to ensure stable and reliable production process. There are many kinds of film blowers, such as PE, POF, etc. Film blower produces film for all kinds of high-grade film packaging. Because of its good barrier, freshness-keeping, moisture-proof, frost-proof, oxygen-proof and oil-resistant, this kind of membrane can be widely used in light and heavy packaging. Such as a variety of fresh fruits, meat, pickles, fresh milk, liquid drinks, medical supplies and so on.