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Laiwu Everflying Plastic Machinery Co., Ltd. welcome you!

    Laiwu Everflying Plastic Machinery Co.,Ltd is a pace-setting technologically advanced enterprise that devoted to the R&D and businesses of plastic machines.At the same time,our company also is the national key high-tech enterprise and China water-saving irrigation association equipment R&D central enterprise.The company always taking “People oriented,Honest operation” as tenet;draws support form quality to occupy the market;extends market by developing products;and draws support from management to gain benefit and growth.

The operating principle of film blowing machine

Brief overview
     In the production process of blown film, the thickness uniformity of the film is a key indicator. And the longitudinal direction can be controlled by the stability of extrusion and drawing speed , and the lateral thickness uniformity of film generally depends on the die precision manufacturing, and changes according to the production process parameters. In order to improve the lateral thickness uniformity of the film, to introduce automatic transverse thickness control system, the common control methods include automatic die head (thermal expansion screws control) and automatic wind ring, it mainly introduces the principle and application of automatic wind ring here.
Fundamental principle
     The automatic wind ring structure adopts double draught style, and one of the down tuyere air volume remains constant, the circle of the up tuyere is divided into several air duct, each air duct is composed of air chamber, valve, motor, ect.The self-acting valve adjusts the air duct openness, controls the amount of each duct air volume.In the process of control, the thickness sensor transfer the signals of the film to the computer, the signal is compared with the current  average thickness by computer. It will use some operations thickness according to the amount of thickness deviation and curve variation tendencies ,to control the movement of the motor drive valve , when the film is thin, the motor positive shift, tuyere turns down; On the contrary, the motor counter movement, tuyere enlargement .To adjust the cooling speed of each point by  changing the amount of wind ring air volume , to make the film transverse direction thickness deviation in the range of targets.
Control option
    Automatic wind ring is an on-line real-time control system, the controlled distribution of system is the motor to spread over the wind ring. The cooling airflow sent by fan distribution on each air d

Laiwu Everflying Plastic Machinery Co., Ltd



Add.: Middle Jing'gangshan Road, High-tech Zone, Laiwu, Shandong, China

Skype: linalee288  

WhatsApp 008613563488171


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