How the MEPER Extrusion Blow Molding Machine Works?

The working principle of PP blow molding machine: similar to blowing bubbles, the first choice is to add resin to the extruder to melt it, pass through the annular hole to make a thin-walled round blank with closed ends, and then introduce compressed air to blow it. Sheet to desired thickness and width. Therefore, blown film is also called tubular film.

Specifically, the working principle of the plastic extruder: after the plastic and the hopper enter the extruder barrel, as the screw rotates, it is forced to the direction of the machine head by the thread. Due to the resistance of the filter screen, the dividing plate and the die of the machine head at the head, and the capacity between the screw threads is gradually reduced, the advancing material is subject to great resistance, and at the same time, it is heated by the heat introduced by the barrel; on the other hand , When the plastic is under the action of compression, shearing, stirring and other forces during the movement, the friction with the barrel, the screw and the friction between the plastic molecules will generate a lot of heat. As the temperature of the plastic in the barrel continues to rise, its physical state gradually changes from a glassy state to a highly elastic state, and finally becomes a viscous state, and is further completely plasticized. Because the screw is constantly rotating, the plasticized plastic is extruded from the die of the die at the same pressure and in the same amount, which is called a plastic product with a certain shape. After cooling and setting, the extrusion molding work is completed.

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