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Journal of Reinforced Plastics and Composites
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Investigation into the Cooling Characteristics of Blown Film Extrusion Lines

Jochen Hauck

Walter Michaeli

Institute for Plastics Processing (IKV), Hausancrift. Pontstr. 49, 52062 Aachen, Germany

To analyze and to optimize the cooling conditions at blown film extrusion lines, the cooling air stream has been determined by using a hot wire anemometer. The velocity and temperature profiles of the air stream and the air pressure along the bubble have been measured. During film extrusion the significant process parameters and the cooling air ring geometry have been varied.

The goal of these studies is to gain a theoretical description of the cooling air stream. Therefore, the experimental results represent a good basis for developing and checking the results of such a model.

Key Words: blown film extrusion • cooling characteristics • heat transition • simulation program

Journal of Reinforced Plastics and Composites, Vol. 18, No. 10, 895-905 (1999)
DOI: 10.1177/073168449901801003
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