The water-based clear top coat was applied approximately 1 mil wet on one side of the paperboard and was difficult to dry.
Line Speed
Line speeds of 750 feet (229 meters) per minute were not being attained.
Solution
Heat
Three Model 4765-38-42 High Density Pyropanel Arrays applied heat to the paperboard to dry the coating. Specially designed bottom and side reflectors enclosed the infrared heating section to improve efficiency and reduce heat loss.
Air
Input air flow and exhausting through the Pyropanel Arrays removed moisture-laden air from the oven cavity.
Chilled Rollers
A threading system with chilled rollers provided a two second ambient air flash for final curing and product cooling.
Power Control
A Phase Angle SCR Power Control System controlled the pyropanel arrays.
Benefits
Closed Loop Control
Closed loop control of the Pyropanel Arrays provided fine tuning of product exit temperature.
System Integration
The heat, air, chilled rollers, power control and closed loop control were all integrated as a complete processing system.
Line Speed
Using three Model 4765 High Density Pyropanel Arrays dried the coating in one second and maintained required line speeds.
Energy Consumption
The Phase Angle SCR Power Control System regulated the voltage to the Pyropanel Arrays according to line speed requirements, keeping energy consumption to the minimum required.
Improved Quality
The closed loop control of the integrated system enabled the manufacturer to obtain consistent drying results.
