This Mill Roll Stand is an efficient method of picking up paper rolls between two chucks for holding the unwinding reels of paper in a controlled fashion.
By having a brake fixed to the outer end of the chuck shafts, which are mounted on the end of the two heavy-duty arms that enable the paper rolls to be clamped on their centre cores.
Closed-Loop Control
The controlled rate of unwinding paper is held under tension by applying pneumatic pressure to the disk brake on the chucks.
This pneumatic pressure is under a fine-tuned controller that is usually an E/P unit that receives its signal from load cells in a closed-loop system.
Open Loop Control
Or in an open-loop system set by a pre-selected tension switch, that maintains a constant proportional tension in the unwinding paper reel.
The two different systems work very well in different applications.
The tension controllers may incorporate other devices to monitor and maintain a steady reducing brake force, which holds the paper reel tension constantly throughout the full reel, for example, a sonic sensor.
Good reel tension is paramount to producing good, corrugated boards on modern high-speed corrugators and laminators.
Corrugator NC Cutter With Helical Cutter
.
