* The heating source of hotplate is steam, the temperature of every
part is adjusted the valves which depend on the layers of
corrugated paperboard and the speed.
* Hydraulic pressure for up and down, subsection pressure according
to the layers of corrugated paperboard. Keeping suitable pressure
is easy for the paperboard to form.
* Pneumatic controls the tension of upper cotton belt, and imported
automatic ballonet adjusts the moving of the upper and down cotton
belt to keep the paperboard edge is in line with the belt.
* Two pressure ways with weight roll or contact bar is optional,
and the PLC controls the pressure.
* Frequency conversion motor drive the Double Facer.
