Three roller calender for plastic sheet machine: Three roller calender for the plastic sheet machine .It is the main machinein the plastic sheet production line . 1,three rollers 2,Type: two shells, with spiral flow channel insideGap adjustable between rollers 3,Speed control : Separate for the three rollers . 4,Gap adjustable between rollers 5,3 units individually temperature control system for three rollers. calendering machine plastic calender