REFINING ELEMENT

摘要

A refining element intended for refiners of disc-type for working fibrous material, where the refining element (10) is provided with a pattern of bars (13, 14) and intermediate grooves, and the refining element (10) is divided into an inner in-feed portion (11) with coarse bars (13) and an outer portion (12) with fine bars (14). The transition (15) between the inner portion and outer portion (11 and 12, respectively) extends arc-shaped over the refining element at varying distance from the inner edge (16) of the refining element.