Closed-coupled extruder and calender line with flow divider - defines shape creating wedge flow between die face and roll for intensive shearing, homogenisation and degassing

摘要

Arrangement for calender line with close-coupled extruder feed, in which flow divider(s) of defined shape creates wedge-shaped flows between the front face of the die and the surface of the rolls, in which the material is intensively sheared and deformed as it flows onto the rolls. USE/ADVANTAGE - For intensifying the process esp. wrt homogenisation and degassing of the material flowing into the calender nip. Compared with the 'Bekalex-Princip' (RTM) of Bersdorff, permits sufficient homogeniety and degassing of the very rapidly worked film entering the nip. Several extruders may feed to the calender through parallel channels where each is degassed, permitting calendering of a sheet with different properties across the width