Auto duct line VI is our latest auto duct line.With U type structure,it cover less space and reduce time of plate passing which achieves the productivity of each duct into twenty to twenty-three seconds.This full-auto line can complete the following processing once time:leveling,grooving,hydraulic notching and punching,size-fixed cutting,pittsburgh lock forming,TDF flange forming,angle-iron flange forming and auto folding.It can produce three types of ducts:"L"shape,"U"shaple.This line features high auomation,high efficiency,low labor cost and less materials usage.