BLADE ELEMENT FOR REFINER

摘要

A blade element (12) for a refiner (10, 11) for refining fibrous material comprises an inner edge (13) and an outer edge (14) and first blade bars (18) and first blade grooves (19) therebetween, the first blade bars and the first blade grooves extending towards the outer edge of the blade element. At top surfaces of the first blade bars there are second blade bars (20) and second blade grooves (21) therebetween. At least some of the second blade bars (20) lying on the outer end portion (12b) of the blade element (12) have a width which is larger than a width of second blade bars (20) lying on the inner end portion (12a) of the blade element (12) and/or is increasing in direction towards the outer edge (14) of the blade element (12).