| Infrared dryers in corrugated operation improve the output of rotary diecutters and flexo folder gluers. The dryers are mounted in open space between printing rolls. The dryers completely dry the ink from the current print station prior to the corrugated sheet entering the next print station. Infrared technology is in the short wave band, resulting in less heating and more drying of the ink.
By drying the ink completely, production speed is improved by reducing or eliminating smear and trapping problems. In those instance when a job is passed through the machine multiple times for ink or varnish drying, production has been shown to improve substantially. In one instance, production time improved by changing the job from three passes to one pass on the machine.
Plants have been able to expand their capabilities with the use of IR dryers. For example, work that requires a varnish is now possible to be able to be run at efficient production rates.
The dryers have variable power controls in order to be able to use only the amount needed on each print station. They are also zoned so that only the lamps that are needed are used.
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| Ultraviolet dryers cure the ultraviolet liquid applied at a print station. These units are designed especially for the corrugated industry. Units have controls to vary the power settings, and to individually turn on each lamp.
Corrugated products with an ultraviolet coating are used to create eye-popping gloss and to create a barrier to prevent scuffing or smudging of the printed surface.
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