... weight:25T High-speed Guardrail Cold Roll Forming Machines/Expressway Guard Rail Forming MachineHighway guard rail roll forming machine 1) ... decoiler, levelling, punching system, coil feeding machine, guider, roll forming machine, cutting system, collecting platform and the PLC controlling ... :Material of forming rollers: GCr15 bearing steel with quenched treatmentMaterial of cutter blade: Cr 12 mould ...