Shaping apparatus for the extrusion of tubular thermoplastic...

Details Shaping apparatus for the extrusion of tubular thermoplastic... Shaping apparatus for the extrusion of tubular thermoplastic...

B - Operations, Transporting

29

D

18/528

B29D 7/06 (1980.01)

Patent

CA 1060164

ABSTRACT OF THE DISCLOSURE Blown tubular film is formed by an extruder using a diverging housing with cooling fluid inlets to cool the film bubble. The inlets are arranged so as to create a partial vacuum which draws the bubble outwards and conforms it to the shape of the housing without bringing the hot film into contact with the housing.

218052

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