Double sandwich belt continuous color-steel polyurethane (PU) foaming sandwich panel production line is made up of Double sandwich main machine,Lateral movable double layer forming machine, PU foaming machine, Auto-tracking cutting machine,Hydraulic decoiler Double sandwich belt use PVC rubber material for its standard belt. The whole machine use PLC auto-tracking cutting, speed of producing frequency regulation, to make the process of PU foaming and solidificatopm finished by spreading of double sandwich belt. The whole units synchronized good, simple structure, easy operation, low costly and high utilization. It is the first choice for the iron and building materials insudtries. Nantong Reliantt Co. can offer lots of types of Cold Roll Forming Machines, such as roof & wall cladding roll former, corrugated rollforming, tile roof roll forming line, C, Z, M purlin machine, U channel forming machine, floor decking metal forming, ridge cap & gutter rollforming line, rainspout/ downpipe metal sheet rollformer, high way guard rails etc.