Drying

The perfect residual moisture counts

The veneer sheets, still damp from the slicing, are being transported quickly to a modern jet drier, which also has a gentle flattening effect. Every single veneer sheet – supported by suction devices – is inserted by hand and also manually taken out at the end of the drying route. They are then made up […]

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The veneer sheets, still damp from the slicing, are being transported quickly to a modern jet drier, which also has a gentle flattening effect. Every single veneer sheet – supported by suction devices – is inserted by hand and also manually taken out at the end of the drying route. They are then made up into bundles of 24 or 32 sheets each in order to facilitate handling in the warehouse later on. Damaged sheets are already sorted out at this point.

From one wood species to the next different drying programs must be run with regard to belt speed and temperature, which have to be strictly adhered to. Veneer, which is too dry, is brittle and no longer workable. On the other hand, veneers that are too moist can become moldy, thus being no longer usable. A final moisture content of approx. 10-14% is considered to be the average value as a result of correct drying.

Since many veneers tend to buckle after drying due to the different densities given in the veneer leaf, these veneers had to be flattened in the past by means of an extensive additional pressing operation. Meanwhile a press dryer has been developed which gently presses as well as dries the veneer. However, this is only suitable for slightly buckled veneers. Veneers, which are severely buckled (as occurs in Beech), have to be pressed manually again, so that they can be processed further without any problems. – Next step: Clipping