60" WALDRON / ROSS AIR SYSTEMS REVERSE ROLL COATING STATION

60" Waldron / Ross Air Systems reverse roll coating station. Age 1995. 3-roll system. Reverse roll coaters meter an accurate thickness of coating between two precision chilled iron rolls & apply the pre-metered coating to the web. The amount of coating applied is controlled by the opening between the metering & applicator rolls & by the speed of the applicator roll which rotates reverse to the web. Water-based coating. (2) chilled iron rolls, (1) rubber-covered backing roll. Wedges for precision micrometer adjustment between metering rolls & backing roll. Reverse roll coating stations apply a wide range of coatings in viscosities of 50 to 200,000 CPS, from 100% to less than 10% solids. Servo driven motorized wedge block gap adjustment between applicator roll & metering roll. Applicator roll can be controlled automatically through gauging system. Automatic running adjustment of coat weight applied. Applicator roll is fixed. Metering roll is air-loaded against the applicator roll. Backing roll is air-loaded against the applicator roll. Gap adjustment between backing roll & applicator roll is done manually. Gap adjustment between metering roll & applicator roll is done remotely with servo drives. Drives are sized for up to 200 FPM. Metering & applicator rolls 10" dia., chilled iron accurately ground to a T.I.R. of .00015 or better & mounted in precision anti-friction bearings. These (2) rolls are positioned to form a coating fountain consisting of the rolls & a slurry box where coating is put. Applicator roll is fixed in position & the metering and backing rolls are adjusted to it. Backing roll is 12.5" dia., elastomer covered. On top of the coating station is a pre-metering system which can be used if needed or can be removed. Pre-metering system allows pre-metering of coating material before it goes into the damn for the 3-roll reverse roll coating station. Originally had gap control between the applicator & metering roll and this was done through a Beta gauge system. (2) servo motors with controllers to control the gap adjustment. Schmidt couplings are provided for the metering roll, applicator roll & backing roll. Dodge reducers. Reliance variable speed AC Vector drives. 460 volt, 3 phase, 60 cycle. (4) motors; (3) 5 HP & (1) 15 HP Reliance motors, AC variable speed. Each roll in this system has a drive motor. All rolls are 66" wide. (3) spare rolls, (1) applicator roll, (1) metering roll & (1) backing roll. Machine is in excellent mechanical condition.