A method and a device for compressing and processing a...

B - Operations – Transporting – 27 – N

Patent

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B27N 3/18 (2006.01) B27N 3/08 (2006.01)

Patent

CA 2407116

The present invention relates to a method and a device for compressing and processing a material mat (1) when manufacturing boards of material containing lignocellulose. The device comprises rotatable compressing rolls (2; 22), at least one of which is provided with a perforated shell surface (6; 26) and a channel system (7:27) arranged axially inside the shell surface, the processing medium being supplied to the mat via a slide shoe (8; 28) sealingly abutting the end wall of the roll (2; 22), further via the channel system (7; 27) and the perforated shell surface, and injection of the processing medium to the mat via the perforated shell surface occuring in a restricted sector (9) of the roll (2; 22) where the mat is compressed. Characteristic of the invention is that the injection of the processing medium can take place over a stepwise variable axial width of the roll (2; 22).

La présente invention concerne un procédé et un dispositif de compression et de traitement d'un tapis de matière (1) lors de la production de panneaux en matériau contenant de la lignocellulose. Le dispositif comprend des rouleaux de compression pivotants (2; 22), au moins un rouleau étant doté d'une surface coque perforée (6; 26) et d'un système de canaux (7:27) conçu axialement dans la surface coque. La substance de traitement est délivrée au tapis par une pièce coulissante (8; 28) appuyée de façon hermétique contre la paroi terminale du rouleau (2; 22), ainsi que par le système de canaux (7; 27) et la surface coque perforée. La substance de traitement est injectée au tapis par la surface coque perforée apparaissant dans une section restreinte (9) du rouleau (2; 22) où le tapis est comprimé. L'invention est caractérisée en ce que l'injection de la substance de traitement peut se produire sur une largeur axialement progressivement variable du rouleau (2; 22).

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