The DryingMonitor, the latest addition to Heidelberg’s Star peripherals, is said to be a “world first”, with innovative sensor technology and an in-line measuring process that gives press operators access to objective information on the drying quality of coated sheets.
This is obtained by determining the amount of coating applied in the coating unit and by equipping the delivery and any drying units with sensors that record all drying related parameters. These include the amount of water introduced by the coating, the volume of air and the temperature and humidity of the incoming and outgoing air.
The DryingMonitor uses all these parameters to produce a recommendation for the press operator, indicating whether to use a lower or higher dryer output for a perfect drying result.
According to Heidelberg, this “puts an end to sheets in the pile sticking together as a result of inadequate drying or the coating yellowing due to excessive heat”. Energy consumption can also be reduced significantly, it is claimed.
The DryingMonitor will be available initially for the Speedmaster XL 105, from September, 2008, and other press models later.
The drying quality can only be measured when working with water based coatings. The unit is not yet able to conduct in-line measurements of ink alone or UV ink used with or without UV coating. Heidelberg will be showcasing the final version, integrated into the central press control system, at drupa 2008.
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