A complete plastic sheet production line typically comprises the following core components:
1. Extrusion System
-Single-screw (mainstream) or twin-screw extruder-Nitrided steel screws and barrel (e.g., 38CrMoAlA) with forced lubrication and cooling
-Mesh interchanger: filters impurities to ensure sheet cleanliness
2. Forming System
-T-jet die or fish-tail die: uniformly extrudes melt into flat sheets
-Three-roll calender: vertical, inclined, or horizontal configuration, controls thickness, gloss, and surface roughness (Ra ≤ 0.2 μm)
3. Auxiliary Systems
-Traction machine, edge trimming device, coiler/roller coiler
-Automatic length-cutting, tension control, and online thickness measurement (available in high-end models)
4. Control System
-PLC + HMI + frequency converter (e.g., Siemens S7-300, ABB ACS800)
-Supports PROFIBUS fieldbus for centralized monitoring and parameter adjustment
