We passed ISO9001 test 1,Single layer extrusion machine 2, Screw ... temperature diff≤±2°C(IV)Roller Temperature Controller 1 Three-Roll circulating water cooling 2 Spiral liner ... to increase cooling effect 3 After a hard chrome plating, grinding, IF, polished.(V) Edge ... Conveying Devices1,Conveying rollersOne rubber roller, the other Chrome-steel-made roller2,Driving forceReducer and motor drive, ...