Air-Cooling-Ring Systems


For a maximum performance of your production lines!

The decisive factor for the film quality and performance of blown-film extrusion lines is the air ring. Therefore Kdesign has developed the high-performance air ring KARAT , which has been proving its productive efficiency on several hundred lines, day by day.

The development of the KARAT air ring is based on substantial fluidic studies and thorough practical tests, along with our customers.

The high-performance air ring KARAT stands out for:

  • Highest cooling rate
  • Improved film tolerances
  • Absolute even air distribution
  • Excellent bubble stability
  • Maximum air flow, minimum pressure drop
  • Easy handling
  • Optimal retrofitting of gauge control system VARIOcool

Small step – but huge effect!

The replacement of your existing air ring by a high-performance air ring KARAT represents a small investment which will pay off rapidly. The retrofitted lines attain a considerable production increased (regularly over 25%) and an improvement of the film tolerances.

In addition to our Karat air rings we offer a wide range of auxiliary equipment:

  • Motorised lip adjustment:
    For an easier handling of bigger air rings and a reproducible adjustment of the air ring
  • Lifting devices:
    For an easier start-up and die gap cleaning
  • Housing insulation:
    To avoid the forming of condensed water
  • Air distribution systems:
    Low pressure drop, for a direct connection with the air ring
  • Blowers and heat exchangers:
    Matching the air ring

All air rings made by Kdesign are designed according to user requirements and are suitable for the following applications:

  • Die sizes 50 – 2500 mm diameter
  • Stationary and rotating die heads
  • Normal or long-neck bubble

Die Sizes

After retrofitting 50% increase in output and 75% tolerance improvement.
After retrofitting 46% increase in output and 78% tolerance improvement.
After retrofitting 31% increase in output and 82% tolerance improvement.