Add the dried polyethylene particles into the lower hopper, and enter the screw from the hopper by the weight of the particles themselves. When the particles contact the inclined edge of the thread, the rotating inclined edge generates a thrust perpendicular to the inclined edge surface of the plastic. Push the plastic particles forward. In the process of moving, due to the friction between the plastic and the screw, the plastic and the barrel, as well as the collision and friction between the particles, and at the same time, due to the external heating of the barrel, it gradually melts. The molten plastic is filtered by the machine head to remove impurities, and comes out of the die mouth of the die head. It is cooled and expanded by the air ring, and then rolled into a drum by the herringbone plate, traction roller and coiling. Electrical control. Generally, the unit is equipped with a unit operation cabinet. The main button is pressed to connect the main power supply, and the main switch of the motor is turned on. The body, tee and each button of the die can be electrically heated through the sub button switch respectively. The two groups of coils in the key part adopt thermocouple automatic temperature measurement and automatic temperature control. In the normal production process, the temperature can be automatically controlled to ensure the stability and reliability of the production process.