A refining surface for a refiner for defibering material...

Details A refining surface for a refiner for defibering material... A refining surface for a refiner for defibering material...

B - Operations, Transporting

02

C

B02C 7/12 (2006.01) D21B 1/14 (2006.01) D21D 1/30 (2006.01)

Patent

CA 2490717

The invention relates to a refining surface in a refiner for defibering material containing lignocellulose, which refiner has two coaxially rotating refining surfaces. The material being defibered is fed between the refining surfaces that both have grooves and bars. According to the invention, at least some of the refining surfaces have on their outer surface a bevel that becomes lower starting from the incoming direction of the bars of the other refining surface so that when the refining surfaces rotate relative to each other, a force that pushes the refining surfaces away from each other is created between them.

L'invention concerne une surface de raffinage pour raffineur utilisé pour le défibrage d'un matériau renfermant de la lignocellulose. Ce raffineur comporte deux surfaces de raffinage qui tournent coaxialement. Le matériau à défibrer pénètre entre les surfaces de raffinage qui comportent toutes deux des gorges et des arêtes. Selon l'invention, certaines au moins des surfaces de raffinage présentent sur leur surface extérieure un biseau qui va en diminuant à partir de la direction d'entrée des arêtes des autres surfaces de raffinage. Ainsi lorsque les surfaces de raffinages tournent les unes par rapport aux autres, une force se crée entre elles qui tend à les repousser à l'écart les unes des autres.

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