FIELD: process engineering.
SUBSTANCE: flexible film sleeve 10 is cut in helix to flat strip by unwinding the film by rotary unwinder 1 on feeding flat film to sleeve expansion zone. Flat sleeve expands in said zone to round cylindrical sleeve to be passed axially above hollow mandrel 14 that feature OD slightly smaller than expanded sleeve diameter. Cutting is performed by knife 18 arranged at mandrel to flat strip moving off toward mandrel axis at an angle. Flat sleeve is stretched in lengthwise direction by tensioning tolls 107-112 revolving jointly with aforesaid unwinder. Besides, proposed device comprises stabilising means to stabilise orientation created by said tensioning rolls as applied to strip cut in helix after withdrawal from the mandrel.
EFFECT: higher film stabilisation, particularly, that thin laminar plastics.
22 cl, 3 dwg
