Abstract: The work process of the plastic extrusion machine and the characteristic of the tension control in the product line of BOPP were introduced. Aiming at the current problem of tension control in extrusion machine, a project was proposed that applied the frequency control technique to the tension control of extrusion machine. The practical test shows that the project of applying VG7 inverter in the extrusion machine can realize the constant tension control, improve the adjustable frequency precision, decrease the cost and operate conveniently, run steadily, and has great market value.

Key words: VG7 inverter , Extrusion machine , Tension control

摘要： 介绍了BOPP生产线中塑料挤出机的工作工程以及张力控制的特点,并针对目前塑料挤出机张力存
在的问题,提出了将变频调速技术应用于挤出机张力控制的方法。实践证明,VG7变频器可以实现塑料挤出机的恒
张力控制,提高调速精度,降低成本,并且操作简单,运行稳定,具有很好的市场推广价值。

关键词: VG7变频器 , 挤出机 , 张力控制