Spiral distributor, die head, blown film line, method for...

Details Spiral distributor, die head, blown film line, method for... Spiral distributor, die head, blown film line, method for...

B - Operations, Transporting

29

C

B29C 47/08 (2006.01) B29C 47/12 (2006.01) B29D 7/01 (2006.01) C08J 5/18 (2006.01)

Patent

CA 2740540

Foil extrusion lines use spiral distributors for producing a melt which is as homogeneous as possible during operation. The spiral distributors are mostly available as cylindrical or conical axial spiral distributors or as radial spiral distributors. The spiral distributors have spiral channels. These run in a multiple spiral arrangement so that rather flat horizontal edges are formed precisely in initial sections and vertical edges are formed between the beginning of spiral channels and transition sections of adjacent spiral channels. The melt can easily adhere there. The invention proposes to provide acceleration means for the melt in critical areas. For this, the invention provides for instance for a modification of the course or the cross-section of the channels or the surface.

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