Laminating, embossing, coating, calendering, sheeting, rewinding and printing operations are more efficient and more competitive with the right bowed roll solution.
Mount Hope can engineer a web smoothing solution for virtually any application. Contact your local Stowe Woodward Application and Service Engineer for specific recommendations on improving your process.
Setting the Bow
Setting the plane of the bow properly is the key to optimum spreading of the web for the ultimate in wrinkle removal, leading to improved quality and higher productivity.
Fixed Bow Roll
The Mount Hope Fixed Bow Roll has an axle that is curved to a predetermined bow based upon the type of application, weight and type of material to be handled.
The Mount Hope fixed bow roll high abrasion resistant sleeve is the standard roll for most applications.
Bearing life is always a consideration and Mount Hope supplies all rolls running in wet applications with special end seals to keep out water, chemicals, and debris. Air purge is also available for extreme applications.
VARI-BOW Roll
The Mount Hope VARI-BOW has a patented split axle design that allows the machine operator to change the amount of bow to react to unpredictable spreading requirements and variable conditions encountered when running different weights, grades or types of material.
MULTI-BOW Roll
The amount of bow in the Mount Hope MULTI-BOW can be adjusted for optimum operating efficiencies by an operator while running at machine speeds. This unique technology provides manufacturers with ultimate fine tuning for varying and changing grades, weights, widths, and web tensions.
Roll Design Options
Sleeves
Specially formulated elastomeric sleeves provide the dynamic properties and durability for long performance life. Exceptionally abrasion resistant covers deliver exponential wear and long-term economy in extremely abrasive applications.
Teflon Sleeve
Mount Hope offers an optional Teflon outer shrink fit tube for maximum release. The Teflon sleeve fits over the bowed roll rubber cover and provides release properties unattainable with conventional roll cover materials.
Grooving
To ensure sheet-to-roll contact at higher speeds Mount Hope offers a variety of grooving configurations. Standard circumferential grooves or spiral grooving eliminates air boundaries that can create web flotation.
Air Purge
Air Purge systems supply an air pressure of 12 inches water column (1/2 psi) to the inside of the bowed roll to prevent the roll from "breathing" when the roll goes from operating temperature to room temperature thereby drawing contaminants through the end seals.
Sheaves
Mount Hope bowed rolls are available with single or multiple "V" belt drives, timing belts, free wheeling rope and fixed rope sheaves, as well as special sheaves to meet specific needs.
Mounting Brackets
On bowed rolls 7 1/8" and smaller, standard pillow block mounting brackets are standard. Bowed rolls 10 1/2" and larger as well as all VARI-BOW rolls are supplied with RE rotatable brackets, which are also available on smaller rolls. Special modified brackets, including remote control bow rotation systems, are available to meet specific customer needs.
Remote Bow Rotation System
Rotating brackets are available with a remote bow rotation system for remote bow direction control on applications with limited access.
Dual Roll Slit Separator
For multiple cuts, Mount Hope engineers utilize two bowed rolls to prevent interleaving by imparting a guiding or diverging action to each slit web while maintaining equal path lengths of each slit web.
Setting the bow direction for dual roll slit separation follows a different principle than single roll applications. Contact your Stowe Woodward / Mount Hope Applications Sales Engineer for recommendations on your application.
Mount Hope Reconditioning Services
Experienced Mount Hope Service Technicians do a complete visual inspection of each incoming bowed roll. The roll is then disassembled... roll, bearings, brackets etc. Each component is thoroughly cleaned and inspected for wear or misalignment.
Each bearing that is determined to require replacement is replaced with a new bearing. Each usable bearing is cleaned and re-greased with special greases that withstand high speed and high temperature operation.
Prior to reassembly each component and sub-assembly is tested and monitored for quality and reliability
Metrol
Mount Hope METROL metal rolls deliver exceptional durability and are available with chrome, no-stick and tungsten carbide grip coatings.
HTA Bowed Roll (High Temperature Application)
The High Temperature Application (HTAT) bowed roll from Mount Hope maintains a smooth sheet and extends roll service life in high-temperature environments. Designed by Mount Hope engineers with a liquid cooled axle, the bearing races are kept below the grease temperature limit, assuring maximum roll life.
Guardian Monitoring System
GUARDIAN is a simple, low-cost system that protects against down time caused by bowed roll failure. Strategically mounted accelerometers, thermal sensors and tachometer, monitor and record vibrations, temperatures and speed, alerting the operator of an impending roll failure.
The continuous data is digitally displayed for operator action, and stored in a self-contained enclosure for use as a guide for predictive maintenance.
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