Refiner Blade and Segment, as Well as a Method of Forming Them and a Method of Modifying Blade Grooves

A blade segment of a refiner blade, comprising a blade surface for defibrating a lignocellulose-containing material, the blade surface comprising blade bars and blade grooves provided therebetween, and at least one blade groove provided in the blade surfaced being formed by removing material from the blade surface by water cutting.

A refiner blade comprising a blade surface for defibrating a lignocellulose-containing material, the blade surface comprising first blade bars and first blade grooves provided therebetween, and the first blade bars comprising second blade bars and second blade grooves provided therebetween and arranged to connect the first blade grooves, and a width of the second blade grooves in 0.3 to 1.0 mm.

A blade segment of a refiner blade, comprising a blade surface for defibrating a lignocellulose-containing material, the blade surface comprising first blade bars and first blade grooves provided therebetween, and the first blade bars comprising second blade bars and second blade grooves provided therebetween and arranged to connect the first blade grooves, and a width of the second blade grooves being 0.3 to 1.0 mm.

A method of forming blade grooves in a blade surface of a refiner blade or a refiner blade segment, the blade surface being provided for defibrating a lignocellulose-containing material, in which method the blade surface of the refiner blades or the blade surface of the refiner blade segment is provided with at least one blade groove by removing material from the blade surface by water cutting.

A method of modifying blade grooves provided in a blade surface of a refiner blade or in a blade surfaced of a refiner blade segment for defibrating a lignocellulose-containing material, in which method at least one blade groove provided in the blade surface of the refiner blade or in the blade surface of the refiner blade segment is modified by changing the shape of a cross-section of the blade groove by removing material from the blade surfaced by water cutting.