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Web Moisture Compensation
Segmented Water Sprayer
The Copar SWS-5 Segmented Water Sprayer System provides the ability to selectively add moisture to isolated areas of the corrugated web in order to correct warp which is beyond the control of standard machine adjustments.
Once the Operator has entered the amount and location of moisture needed, the SWS-5 calculates the required flow rate at the current machine speed. As the machine speeds up or slows down, the valves automatically adjust the water volume applied, ensuring consistency regardless of speed.
The valves automatically shut off when stopped, and resume to the previous settings once production resumes.
The Copar Segmented Water Spray System adds moisture to the web through use of a water manifold and electrically operated valves. Each valve is individually controllable, allowing moisture to be added precisely where it’s needed. Multiple options are available to accommodate web widths up to 130 inches (3,3 meters).
One, two, or three manifold systems are available to meet various operational requirements. The Operator selects the appropriate manifold for the warp condition, along with the “zone” moisture is needed using toggle switches on the main control panel.
- Single Manifold System can supply moisture to one web with the ability to correct normal (up) or reverse (down) warp, depending upon location of the manifold.
- Dual Manifold System can supply moisture to up to two webs with the ability to correct normal, reverse and “S” warp.
- Triple Manifold System can supply moisture up to three webs with the ability to correct normal, reverse and “S” warp.
The SWS-5 helps produce flat product on both corrugators and machines which produce open face webs, such as litho-laminators. On corrugators, warp problems are often caused by unbalanced moisture between the top and bottom liners. Traditionally, these problems have been corrected through a combination of preheater wrap arm temperature adjustment or the more expensive option of increasing starch (and water) in an attempt to make good board.
Copar’s SWS-5 System provides a cost effect solution for production lines which tend to run out of heat often due to machine limitations or the paper being run. The system allows the crew to selectively add moisture to specific areas of the web to address issues such as mill wet streaks or roll irregularities.