his kind of production line is designed for extrusion of PVC plastic door and window profiles and cross-section communication cable pipes, Aluminum-plastic composite profiles, etc. It has stable plastification, high output, low sheering force, long life service and other advantages. PVC profiles can be used in the building industry and home or office. The production lien consists of control system, conical twin screw extruder, extrusion die, calibration unit, haul-off unit, film covering machine and stacker. The extruder is equipped with alternating-current converter, imported temperature controllers. The calibration unit pump and haul-off unit reducer are the famous brand products. After simple changing of the die and crew, it also becomes possible to produce foam profiles.