Refining element

Details Refining element Refining element

D - Textiles, Paper

21

D

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

Patent

CA 2189338

A pair of co-operating refining elements (10, 11) intended for a disc refiner to disintegrate and refine lignocellulosic material in a refining gap between two opposed refining discs rotating relative to each other. The refining elements (10, 11) are intended to be placed directly in front of each other on opposed refining discs. Both refining elements are formed with bars (12) and intermediate grooves (13), which in the outer portion (16) of the refining elements (10, 11) are arranged in a number of limited zones (17-24) located radially outside each other. Each refining element (10, 11) comprises at least one zone (18, 20 and, respectively, 21, 23) where the bars (12) are placed more densely than in an adjoining zone (17, 19 and, respectively, 22, 24). These more densely patterned zones (18, 20) on one refining element (10) shall be radially offset without overlapping in relation to the more densely patterned zones (21, 23) on the other refining element (11).

Paire d'éléments de raffinage (10, 11) d'une raffineuse à disque servant à désintégrer et raffiner des matériaux ligno-cellulosiques dans l'espace de raffinage compris entre deux disques de raffinage tournant l'un par rapport à l'autre. Lesdits éléments de raffinage (10, 11), qui agissent en coopération, sont conçus pour être placés directement l'un en face de l'autre sur des disques de raffinage opposés. Lesdits éléments de raffinage (12) sont constitués de barres (12) et de sillons (13) qui, dans leur portion extérieure (16) sont disposés en un certain nombre de zones limitées (17-24) situées radialement à l'extérieur les unes des autres. Chaque élément de raffinage (10, 11) comporte au moins une zone (18, 20 et respectivement 21, 23) où les barres sont plus denses que dans la zone contiguë (17, 19 et respectivement 22, 24). Ces zones plus denses (18, 20) de l'un des éléments de raffinage (10) seront décalées radialement sans se chevaucher par rapport aux zones plus denses (21, 23) de l'autre élément de raffinage (11).

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