The existing medium density heaters were rated at 40 watts per square inch (6 watts per square cm).
Line Speed
A line speed of 130 feet (40 meters) was required and the existing heat source could only accommodate line speeds of 100 feet (31 meters) per minute.
Uneven Heating
The 47 inch (1194 mm) wide polyester film was reaching the required temperature in the center of the web but remaining several degrees cooler on the edges.
Limited Space
Space was limited both above and below the film line and the only available location to place heaters was a point on the web where the film travel was vertical.
Solution
Heat
Five Model 4554 High Density Pyropanels (four Model 4554-A-05-12 and one Model 4554-A-05-06) were mounted side-by-side to provide 54 inches (1372 mm) of high density infrared heat.
Heat Zones
The High Density Pyropanels were configured with center and end heating zones.
Vertical Installation
The High Density Pyropanels were installed vertically in the line.
Benefits
Sufficient Heat Source
The Model 4554 High Density Pyropanels provided 100 watts of infrared heat per square inch (16 watts per square cm).
Line Speed
Required line speed of 130 feet (40 meters) per minute was achieved with the capability to increase line speed to 160 feet (49 meters) per minute.
Even Heating
The center and end heat zones compensated for heat loss at the edges of the polyester film.
Well-Utilized Space
By installing the High Density Pyropanels vertically on the line, the manufacturer was able to achieve the desired results in the space available.
