Cooling apparatus for tubular plastics films extruded from a...

B - Operations – Transporting – 29 – C

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B29C 49/64 (2006.01) B29C 47/88 (2006.01)

Patent

CA 1223412

Abstract Cooling apparatus for tubular plastics film extruded from a film blow head comprises an outer cooling ring which surrounds the extruded tubular film and defines an annular nozzle gap with a blowing direction substantially parallel to the wall of the tubular film. Near the end of a cooling section formed by an inner cooling ring beneath the inflated region of tubular film, there is an apertured baffle plate or diaphragm of which the axial projection onto the film bubble covers at least its interior inflated region and, together with the wall of the tubular film, bounds an annular gap.

463609

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