PU – PIR Sandwich Panel Production Line

System Components
1. Uncoiling and Pretreatment System: Responsible for unwinding, cleaning, gluing (if necessary), and drying pre-treatment of metal panels such as color-coated steel sheets.
2. Roll Forming System: A series of precision rollers roll the metal panels into the desired shape (e.g., corrugated, flat, etc.).
3. PU/PIR Foaming System: This is the core of the production line. A high-pressure foaming machine pours a uniformly mixed PU or PIR liquid material onto the moving lower metal panel. The PIR formulation can be enhanced by adding an excess of isocyanate to create a denser cross-linked structure, improving heat resistance and flame retardancy.
4. Double-Belt Laminator (Crawler Type): Provides continuous pressure and heating to foam, cure, and firmly bond the core material between the upper and lower metal panels, forming a continuous sandwich structure.
5. Curing and Cooling System: Ensures the foaming reaction is fully completed and allows the sheet to gradually cool and set.
Cutting System: A flying saw or other automated cutting device precisely cuts the continuously produced sheet into the desired length. 6. Stacking and packaging system: Automatically collect, stack and package the finished panels for easy storage and transportation.