Compensate roll deflection for consistent calendering
Heavy nip loads in calendering and sheet processes cause rolls to bend. The FRANKLAND-Flex® design introduces a counter-deflection within the roll structure to offset this bending. By mirroring the deflection of the mating roll, it keeps the nip parallel and your sheet thickness uniform across the web.
When to choose this roll
- When producing sheets or films where thickness uniformity is critical.
- When nip loading exceeds standard roll deflection limits.
- When your existing calender rolls show crown wear due to bending.
- When you need to reduce costs by avoiding adjustable roll bending systems.
- When high line pressures make traditional crowning insufficient.
How it works
FRANKLAND-Flex® uses a multi-layered shell and core assembly that deliberately bends in the opposite direction of the mating roll. As nip load increases, the inner shell’s engineered stiffness causes controlled reverse deflection, keeping the outer roll face parallel to the mating roll. This eliminates the need for external bending mechanisms and allows constant pressure distribution across the web.
Where it pays off / Applications
Calendering of plastic sheets, rubber and composites; sheet extrusion lines; paper and textile calenders; any application where roll bending limits product uniformity.
Specifications / Capabilities
Diameter: up to 36 in.
Length: up to 240 in.
Weight: up to 15,000 lbs.
Deflection compensation: engineered according to nip load, roll geometry and mating roll behavior.
Materials: custom engineered steel cores with optional stainless overlay.
Surface finish: ground or polished according to calendering requirements.
Load capacity: defined based on line parameters.
Compliance & options
Available with the ASME code design for pressure heating or cooling. Optional integration with existing calender stands. Surface hardening and chrome plating available for wear resistance.
