How the film blowing machine works

What is the working principle of the film blowing machine

First, the film blowing machine is a mechanical device that heats and melts plastic particles and blows them into a film.

(1) Production process and principle The thrust perpendicular to the facets pushes the plastic particles forward. During the pushing process, due to the friction between the plastic and the screw, the plastic and the barrel, and the collision and friction between the particles, it also gradually melts due to the external heating of the barrel. The molten plastic is filtered by the machine head to remove impurities and comes out from the die mouth of the die head. Film blowing machine inverter

(2) The main structure of the film blowing machine is mainly composed of an extruder, a die head, a die head, a cooling device, a foam stabilization frame, a herringbone plate, a traction roller, a coiling device, etc.

1: Extruder, the extruder is mainly composed of screw, barrel feeding hopper, deceleration and driving motor. The driving motor adopts electromagnetic speed regulating motor (or common frequency conversion motor), and drives the reducer through belt drive to make the screw in the barrel. Make a rotating motion; make the hopper plastic particles extrude from the die mouth of the die head through three-pass filtration under the condition of external heating.

2: Three-way, composed of three parts: filter screen, filter plate, and three-way gland.

3: Die head

4: Cooling device, composed of cooling air ring, air duct, blower, etc.

5: Traction, which is composed of main components such as traction frame, herringbone, traction roller, coiling mechanism and traction motor.

6: Electrical control part. Generally, the unit is equipped with a unit operation cabinet. Press the main button to turn on the main power supply and turn on the main switch of the motor. The main body and tee, and the electric heating of each button of the die can be controlled by the sub-button switch respectively. Two sets of coils use thermocouples for automatic temperature measurement and automatic temperature control. During the normal production process, the temperature can be automatically controlled to ensure the production process is stable and reliable. There are many kinds of film blowing machines, such as PE, POF and so on.

The new material is blown out with new particles, the color is uniform, clean, and the bag is stretched well. Some people also use recycled plastic bags to make particles. This kind of particles is generally called old material. When made into particles, it is usually gray. When making bags, pigments are usually added to make bags with uneven coloring, brittle and easy to break. , the price is also lower.

Although it is a recycled plastic bag, it is generally a waste bag in the bag making process and there is still a big difference between garbage plastic in the usual sense.

The film blowing machine produces films suitable for all kinds of film packaging. This film can be widely used in light and heavy packaging due to its good barrier properties, preservation, moisture resistance, frost resistance, oxygen insulation, and oil resistance. Such as various fresh fruits, meat products, pickles, fresh milk, liquid beverages, medical supplies, etc.