Automatic film thickness control system

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For continuous measurement and online correction of blown film thickness during extrusion

  • Highest control accuracy and up to 70% thickness tolerance reduction

  • Unlike analogues, the system operates in two independent modes

  • Number of control zones 144:

  • 72 air actuator for air volume control

  • 72 air actuators for temperature correction


Circular system of online thickness measurement based on capacitive sensor from Kundig (Switzerland) records thickness variations from the rated value. The datas, received by the sensor, are transmitted to the control system where software calculates the necessary algorithm for adjustment and performs correction of an appropriate film segment, using given number of actuators which are equally spaced along the perimeter of the ring.

  • Sensor Kundig (Switzerland)
  • 3 layers of control

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