Valmet Technologies, Inc.

Metso Paper Inc.

Valmet Technologies Oy

Matti Kaarineva

Håkan Sjöström

Tomi Iisakkila

Marko Loijas

Petteri Vuorio

Kati Lindroos

Nils G Virving

Juha-Pekka Huhtanen

Markku Partanen

Timo Kononen

Timo Könönen

Per Fröberg

Karl Lönngren

Vesa Arjanmaa

Marcus Sjölund

Hakan Sjostrom

Hakan Sjoestroem

Per Froeberg

Håkan SJÖSTRÖM

A blade segment () for a refiner comprises an inner end edge () and an outer end edge () and a first side edge () and a second side edge () opposite to the first side edge (), the first side edge () and the second side edge () extending between the inner end edge () and the outer end edge (), and a refining surface () comprising blade bars () and blade grooves () therebetween on a front surface () of the blade segment (). At least one side edge () of the blade segment () comprises at least one opening () that extends from the side edge () toward the opposite side edge ().

Blade segment for refiner

A blade element () for a refiner () for refining fibrous material has an inner edge () and an outer edge () and first blade bars () and first blade grooves () therebetween, the first blade bars and the first blade grooves extending toward the outer edge of the blade element. At top surfaces of the first blade bars there are second blade bars () and second blade grooves () therebetween. At least some of the second blade bars () lying on an outer end portion () of the blade element () have a width which is larger than a width of second blade bars () lying on an inner end portion () of the blade element () and/or is increasing in direction toward the outer edge () of the blade element ().

Blade element for refiner

A blade element () for a refiner () for refining fibrous material has a blade element body () and blade bars () and blade grooves () therebetween. Bottoms of the blade grooves () have, in the longitudinal direction (LD) of the blade grooves, a variable depth profile comprising alternating high points (') and low points (&#x2033;) so that there is a phase shift (X) between the high points (&#x2032;) and the low points (&#x2033;) of the variable depth profiles of the bottoms of the adjacent blade grooves (). Also, a refiner () for refining fibrous material and a method for manufacturing the blade element () for the refiner ().

A blade segment of a disc refiner for refining fibrous material has an inner circumference and an outer circumference as well as a first side edge and a second side edge which connect the inner circumference and the outer circumference. The side edges are curved, with one convex and the other concave. The segment has a refining surface with blade bars and grooves which define a pumping direction. The side edges of the blade segment curve in the vicinity of the inner circumference in the pumping direction, and in the vicinity of the outer circumference in a non-pumping direction.

Blade segment of disc refiner

A refiner comprises at least one first refining surface (') and at least one second refining surface (&#x2032;), which refining surfaces () are arranged opposite to one another and mobile in relation to one another. In the refiner () either at least the first (&#x2032;) or the second (&#x2032;) refining surface comprises refining surface portions () feeding material to be refined and/or refining surface portions () discharging refined material as well as refining surface portions () grinding the material to be refined, on the upper surface of which there are blade bars () and between them blade grooves (). Both in the first refining surface (&#x2032;) and in the second refining surface (&#x2032;) of the refiner () the cross-sectional area (A) of at least some blade grooves () are arranged to change in the longitudinal direction of the blade grooves ().

Refiner and blade element

A refiner () for refining fibrous material has a first refining surface (') and a second refining surface (&#x2032;) arranged opposite to one another and mobile in relation to one another. The refining surfaces have refining surface portions () feeding material to be refined and/or discharging refined material as well as refining surface portions () grinding the material to be refined, on the upper surface of which there are blade bars () and between them blade grooves (). In the refining surface () of the refiner () the cross-sectional area (A) of at least some blade grooves () is arranged to decrease from one blade groove () to the next from the direction of the feed edge () to the direction of the discharge edge () of the refining surface ().

A refining surface of a refining member, adapted for use with a refiner for defibrating a lignocellulose-containing material, is provided. Such a refining surface comprises a plurality of first grooves, each first groove being defined between two adjacent first bar portions of the refining surface, and extending between opposing first and second radial edges of the refining surface. The refining surface further comprises a plurality of second grooves, each second groove being defined between two adjacent second bar portions of the refining surface forming each first bar portion, and extending between two adjacent second grooves. The first bar portions are wider than the second bar portions, and each second bar portion are between about 1 mm and about 3 mm wide. A blade segment of a refining member is also provided.

Refining surface and a blade segment for a refiner

A refining surface for a refiner intended for defibrating lignocellulose-containing materials, the refiner having at least two refining surfaces arranged coaxially relative to each other, at least one of which rotates around a shaft, and between which the material to be defibrated is fed. The refining surfaces define grooves and between them ridges, at least part of the refining surface ridges being formed of at least two different ridge parts connected to each other in such a way that one ridge part is farther ahead in the rotation direction of the refining surface than the other ridge part. Further, at least in some ridge parts, the front wall in the rotation direction of the refining surface is over at least part of its length substantially inclined.

Growing community of inventors

Lempäälä, Finland

Matti Kaarineva