A new chill-roll stack for thin sheet from Davis-Standard Corp., Pawcatuck, Conn., is believed to be the only one that measures and controls hydraulic force between all nipped rolls.
A new chill-roll stack for thin sheet from Davis-Standard Corp., Pawcatuck, Conn., is believed to be the only one that measures and controls hydraulic force between all nipped rolls. Usually pressure is controlled on winding rolls, while only roll gap and temperature are controlled on chill rolls. The new XP Express roll stack offers hydraulic pressure up to 800 lb/in. and closed-loop control via monitoring either nip forces or roll gap. It also uses dual linear bearings (instead of one) opposing each other at each end of the rolls to prevent torsion during product changes or on start-up and ramp-down. The new roll stack is available up to 80 in. wide. It can be configured with an up, down, or offset stack and permits quick roll changes in 30 to 40 min.