Apparatus and method for cooling plastic film tube in blown...

Details Apparatus and method for cooling plastic film tube in blown... Apparatus and method for cooling plastic film tube in blown...

B - Operations, Transporting

29

C

B29C 47/88 (2006.01)

Patent

CA 2591284

An apparatus and method for cooling a molten plastic film tube exiting the outlet of an extrusion die is disclosed. The apparatus includes an inlet passage adapted to direct cooling air through the extrusion die to the interior of the plastic film tube. The apparatus includes at least one air dispensing device coupled to the inlet passage. The air dispensing device is configured to receive the cooling air and to direct a flow of the cooling air out of the air dispensing device in an approximately circumferential or tangential direction. The circumferential or tangential flow of the inlet air inside the plastic film tube cools the molten tube while reducing impact on the molten tube.

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