Cardboard manufacture

Fourdrinier board
Raw material processing leads the fibre suspension into the wet section. This consists of a bottom- and a top wire. A so called headbox distributes pulp stock evenly onto the wire. The head box is adjustable in cross direction.

The fibre suspension gets dewatered between the two wires. Thereby an endless board web is made which will be removed at the end of the wet section and then is being fed into the press section.
There the wet board web will be pressed out via felts.

Finally the board web passes through the drying section. Here the remaining water is evaporated to a residual moisture content of approximately 7 %. After drying and smoothing the web gets either rolled up on reels or directly cut into sheets.

In order to produce this kind of board, the fibre suspension gets highly diluted. In this consistency it gets applied on several cylinder moulds. Here takes place the sheet formation and is followed by pressing.
The wet layers are being rolled up to a multi-layer board.
When the intended weight respectively thickness is reached the rolled up solid board gets automatically cut with a cross direction electrically controlled knife.
In the next step the wet sheets of board run through a 3-storey dryer. A slitter and a guillotine cut the solid board sheets to the desired format.