Needling machine or multi-needle board needling line

摘要

Needling machine or multi-needle board needling line. Needling machine intended to consolidate by needling a sheet of fibers, in particular a web of nonwoven, comprising a succession of fields of needles, means for causing the sheet of fibers to move opposite the fields of needles, one at a time. following the other, and means for giving a back and forth movement, in a direction transverse to the movement of the web, to the needles so that they cross in one direction, then in the other, the sheet of fibers passing in front of them, the succession of needle fields comprising at least a first needle field and a second needle field, the first needle field being arranged in a first needle pattern and the second field needle pattern being arranged in a second needle pattern, characterized in that the first needle pattern is unsymmetrical in shape, and the second needle pattern is identical to the first pattern, but is rotated 180 ° relative to to this, with respect to an axis pa aligns with the direction of movement of the hands. Figure for the abstract: Fig. 2