Continuous PU/PIR Sandwich panel Production Line

Metal coils are loaded onto the upper and lower uncoilers, then unwound, levelled and preheated to ensure good adhesion with the PU foam. The polyol and isocyanate raw materials are metered precisely by high-pressure metering pumps, mixed instantly through the mixing head and evenly sprayed between the top and bottom metal facings. The composite enters the double-belt laminating and curing section, where the PU material foams, expands and cures under constant pressure and temperature to form an integrated sandwich panel. After curing, the continuous panel passes through edge trimming to remove excess edges, then is cut into custom lengths by a synchronous flying saw. The finished panels are conveyed, inspected and stacked automatically for packaging and delivery.