Method for removal of water from fiber suspension sprayed to flow box in sheet forming part, involves exposing fiber suspension to pulsation free dewatering effect in broken area of cover of forming shoes

摘要

The method involves forming a pulsation free dewatering zone (Z2) directly behind one of breast rollers (22). The dewatering zone begins directly behind another pulsation free dewatering zone (Z1). The former dewatering zone is formed of one of stationary forming shoes (50). Filters (11, 21) are guided together into an area of one of covers of the forming shoes. A fiber suspension runs between the filters. The fiber suspension is exposed to a pulsation free dewatering effect in a broken area of the cover of the forming shoes. An independent claim is also included for a sheet forming part that comprises a filter loop.