The PU line includes the following parts: uncoiling system, film covering and cutting equipment,roll forming machine, preheating oven,high pressure foaming system, double belt conveyor,double belt heating device,cutting system,cooling system, stacking system,and packing system. 
The product of this line sandwich panel is a new type building material for wall panel, which has the function such as good flame retarding, keep warm,heat insulation,sound insulation,waterproof,handiness,environmental protection and so on.It is widely applied in protection and decoration of outside wall for tall building and first class office building.It can protection, keep warm and flame retarding. 
he line mainly product four panel types:
Working Flow:
Dolly feeding coil ------- Uncoiling material --------Film covering (cutting) --------Roll forming-------Preheating material-------Foaming------Laminating in double belt conveyor-------Cutting product------Cooling system------Run out conveyor-------- Automatic stacking product--------Packing products
Sandwich panel lines
Technical Parameters:

Sandwich Panel Spec.
Min.cutting length: 3 meters
Max. Stacking length:15m
Panel width:1000mm (according to profile requirement)
Panel thickness 
Thickness of flat panel:50-150mm
Thickness of corrugated sandwich panel:30-100 mm (exclude corrugated sandwich panel)
Prepainted sheet thickness:0.4-0.7mm (material must be level,no corrugation and distortion)
Yield strength of material:235MPa
Max. width of material:check profile drawing(tolerance ±2mm)
Max. coil weight:10T
Inner Dia. of coil:Φ508, Φ610 mm
PU raw material:two components,141B foaming
PU forming density:35～45 kg/m3
Line speed:3-7m/min (adjustable)
Total length:about 150m
Working height:1200mm (height of panel coming out)
Pressure for foaming:150-200 bar
Effective length of double belt conveyor:21m(this can be designed as customer request)
Control mode:imported PLC system((Mitsubishi)
Total power: about 300Kw(not include the electric heating power)
Power required:380V/3phase/50Hz