There are two styles Duct line Square duct Auto :
one is linear type V, them composed of a decoiler, leveler grooving unit, “V” and “口” notching unit, cutting unit, bending unit，reciprocating lock former unit, feed extraman unit, duplex flange (angle iron & TDF), automatic folder unit composition；
Another is U type V，also composed of a decoiler, leveler grooving unit, “V” and “口” notching unit, cutting unit, bending unit，reciprocating lock former unit, feed extraman unit, duplex flange (angle iron & TDF), automatic folder unit composition；
Except for the above standard configuration, the two types of duct line can be customized based on customer demand with the support of punching of the reinforce holes unit, C & S flange connection required for notching unit and forming unit, U-shaped duct production line can be added more .
