Assembly to form a multilayer material web in a fiber web machine, multi-layer fiber web machine and method for forming a multi-ply fibrous web in a fiber web machine

摘要

The present invention is for producing a multilayer fibrous web particular in a fiber web machine assembly (10) comprising a couch roll (12) is adapted to run on a first supporting fabric (F1) and thereby on the couch roll a first wrap angle (α1 ), wherein in the formation of the fibrous web, the first layer (W1) is arranged to run on the side remote from the couch roll side of the first support fabric to the couch roll, said assembly further comprises a second support fabric (F2), which form a second wrap angle (α2) in the region of said first wrap angle (α1) is adapted to run on the couch roll, wherein in forming the fiber web, the second layer (W2) is set up, at which the roll facing side of the second support fabric on the couch roll to is run, and the second layer (W2) to form a multi-ply fibrous web (W) with the first layer (W1) to unite and set vergautschen and the arrangement at a distance from the surface of the couch roll (12) arranged suction device (14). The invention also relates to a method for forming a multi-layer fiber web and a fiber web machine.