The Polyurethane Sandwich Panel Production Line, also known as the PU Sandwich Panel Production Line, is a fully automated system designed for the continuous and efficient production of polyurethane sandwich panels with various refined and attractive cross-section profiles.
Based on over 30 years of experience in roll forming and panel manufacturing equipment, XINNUO has developed this production line with outstanding durability, easy operation and management, technology comparable to advanced European manufacturers, and a more competitive overall cost.
The equipment is widely used in the domestic market and has been successfully exported to Europe, Asia, the Middle East, Russia, and the Americas, earning high recognition and positive feedback from customers worldwide.
PU sandwich panels produced by XINNUO equipment feature excellent structural strength and superior thermal insulation performance.
According to customer requirements, PIR (Polyisocyanurate) material with enhanced flame-retardant properties can be applied, significantly improving the fire resistance rating and overall safety performance of the panels.
For environmental compliance, the foaming system supports HCFC-141b or Pentane as eco-friendly blowing agents, ensuring production safety while meeting international environmental standards. This makes the entire line a truly green and sustainable production solution.
The complete PU sandwich panel production line consists of the following equipment:
Decoiler system
Roll forming machine
Polyurethane foaming system
Laminating and pressing machine (double belt system)
Panel cutting machine
Cooling conveyor system
Automatic stacking system
Finished product packaging machine
The decoiler is used to stably feed steel coils for the upper and lower facing sheets of the sandwich panel.
It adopts a hydraulic expanding mandrel structure, enabling automated operation with stable performance and easy control.
An optional 2+2 non-stop decoiling system allows coil replacement without stopping the production line, significantly increasing productivity and production efficiency.
The roll forming machine continuously shapes steel strips through multiple sets of upper and lower precision rollers, producing various roof and wall panel profiles with refined and attractive appearances.
The machine features a cassette-type frame structure and rail-mounted design, allowing quick profile change and flexible adaptation to different panel types and market requirements.
The polyurethane foaming system consists of high-precision metering pumps, spray guns, raw material tanks, catalyst and gas systems, and a transverse movable spraying device, ensuring uniform and stable application of polyurethane materials.
The system is designed with a strong focus on accuracy, long-term stability, and ease of maintenance, and is equipped with a user-friendly control panel for convenient adjustment of foaming parameters and production settings.
The laminating and pressing machine applies constant pressure and controlled heat to the upper and lower steel sheets, allowing the foamed polyurethane core to fully cure and achieve final shaping.
The structure is robust and durable, offering excellent rigidity and long service life. Adjustable side sealing plates enable quick switching between different panel thicknesses and specifications.
The cutting system is used to cut finished sandwich panels to the required lengths specified by the customer.
The standard configuration is a band saw cutting system, ensuring smooth edges and high cutting accuracy.
Optional circular blade cutting systems are also available to meet different production requirements.
Due to the relatively large thickness of PU sandwich panels, complete curing requires sufficient time.
The cooling conveyor system provides adequate curing distance before stacking and packaging, ensuring stable performance and consistent product quality.
The automatic stacking system stacks finished panels continuously according to preset quantities, supporting vacuum suction or lifting conveyor methods.
For roof panel products, cross stacking can be implemented to improve transportation stability.
The packaging machine wraps stacked panels with four-side or six-side plastic film and automatically discharges the packaged products.
The system supports pallet packaging and automatic insertion of EPS spacers, making transportation and storage more convenient and secure.
Production speed: 2 – 15 m/min
Double belt conveyor length: 20 – 40 m
Main power supply: 380V / 50Hz / 3-phase (customizable)
Control power supply: 380V / 60Hz (customizable)
Workshop requirement:
Length 130 – 150 m × Width 30 m × Height 6 m
Compressed air pressure: ≥ 6 bar
Operators required: ≤ 10 persons
Panel length:
Minimum (automatic mode): 2000 mm
Maximum: 18,000 mm (±3 mm)
Effective width:
Roof panels: 1000 mm
Wall panels: 600 – 1200 mm
Panel thickness: 30 – 200 mm
Facing material: Pre-painted galvanized steel
Thickness: 0.4 – 0.7 mm
Insulation core: Polyurethane (PU / PIR)
Core density: 30 – 50 kg/m³
