The PU/PIR sandwich panel production line is an automated equipment for manufacturing composite panels through a continuous foaming and lamination process. Its core workflow is as follows: Coiled metal sheets undergo uncoiling, leveling, and roll forming to become upper and lower panels. Simultaneously, polyurethane (PU) or polyisocyanurate (PIR) raw materials are mixed in proportion, then continuously foamed on the lower panel to form the core material, with the upper panel being synchronously covered and laminated onto it. Through traction, curing, and shaping, the core material and panels are firmly bonded together. Finally, fixed-length cutting and stacking complete the production process.

The production line ensures stable panel performance by precisely controlling raw material proportioning, foaming speed, and panel forming parameters. During PIR production, the raw material formula needs to be adjusted to enhance flame retardancy. This line is suitable for efficiently producing high-insulation composite panels.