
This customer by roll forming machines with cassette structure, later, when production requirement increase, he buy another base and control system and hydraulic station , so he can make two forming machines work at the same time.
cassette structure means, two set rollers share with one base, one control system and one hydraulic power for cut, which mean only one set roller can work at same time.
double layer machine is also similar, two set rollers share with one base, one control system and one hydraulic power for cut, which mean only one set roller can work at same time.
advantage of double layer machine is , rollers already on the base, no need to move rollers by crame or forklift as cassette structure.
for this reason, we suggest you buy double layer machines
if you have large production requirement , we suggest you buy two individual roll formers , so they can work at same time.
also economy forming machine and full automatical forming machines are available
they make same quality of final product, the difference is automatical degree and working speed, of course, cost different.
your roll forming machine can be designed and quoted here.