PE PP water cooling down blowing extruder is a kind of equipment used to produce PE,PP plastic films.

The Working Principle of water cooling down Extruder?

1. Add dry plastic granules into the lower hopper of the extruder. The plastic granules enter the screw from the hopper by their own weight.
2. The friction of the plastic particles with the screw and the screw barrel generates heat. At the same time, the external heater of the barrel is continuously heated. The plastic granules gradually melt under the combined effect of internal and external heat.
3. The molten plastic pellets pass through the screen changer to filter the impurities. It is then extruded from the die through the die opening. Then it flows out in a cylindrical shape.
4. The cylindrical film is pulled downward. The film is quickly formed after passing through the water cooling device. The cooled and shaped film passes through herringbone boards, traction rollers and other devices, and is finally wound up into roll film by a winding device.

Advantages of water cooling down blowing extruder

1. High transparency: Water cooling down blowing method can quickly take away the heat.So that the film molecules quickly crystallize.And it form a fine and uniform crystal structure.This improve the film transparency.This method is suitable for packaging products with high transparency requirements.
2. Good physical properties: the film produced has good tensile strength, toughness and puncture resistance, which can effectively protect the contents of the package.
3. Good thickness uniformity: The thickness of the film blank is uniform. Because during the cooling process it is affected by gravity and the homogeneity of the cooling medium. This guarantees consistent product quality.
4. Wide range of production: it is suitable for a variety of PE, PP raw materials, and can produce films of different thicknesses, widths and uses to meet diversified market demands.

Components of water cooling down blowing extruder

1.Extruder: It consists of screw, barrel, hopper, deceleration and drive motor to extrude the molten plastic granules.

2.Die head: Distributes the molten plastic extruded by the extruder evenly to form tubular film blanks, commonly available in spiral mandrel type die head.

3.Cooling device: Including water cooling system and related pipes, nozzles, etc., For rapid cooling and shaping of the film blank.

4.Bubble Stabilizer: Stabilizes the shape of the bubble, prevents it from swinging and deformation, and ensures uniform film thickness.

5.Herringbone plate: Gradually flatten the round film bubble into a sheet, which is convenient for subsequent traction and winding.

6.Traction roller: Tracts the film forward, controls the traction speed and tension of the film.

7.Dryer:Further drying of residual moisture in the film.

8.Winding device: Adopting center winding or surface winding, the film is neatly wound into rolls.

Application areas of water cooling down blowing extruder

Food Packaging: 

Daily necessities packaging: