Method and apparatus for manufacturing a fiber fleece

A method of manufacturing a fiber fleece by means of a nonwoven producing means and a fleece laying machine, which performs laying movements by means of which a fleece web having a thickness variable across a laying width is generated from a single or multi-layered nonwoven web continuously discharged at a constant speed by the nonwoven producing means, wherein the nonwoven web is longitudinally drawn on a path between the nonwoven producing means and the fleece laying machine in a cyclically recurring drawing process in adaptation with the laying movements of the fleece laying machine, the nonwoven web is transported within the fleece laying machine without buffer storage within the fleece laying machine at a variable transport speed in adaptation to the laying movement, and after drawing of the nonwoven web before its transfer to the fleece laying machine a buffering of the nonwoven web takes place for adaptation of fluctuations of the nonwoven web speed caused by the cyclic drawing process to a transport speed of the fleece web within the fleece laying machine and for compensation of changes of the transport speed of the nonwoven web in the fleece laying machine.

A method of manufacturing a fiber fleece by means of a nonwoven producing means and a fleece laying machine, which by the aid of laying movements generates a fleece web having a thickness variable across the laying width from a single or multi-layered nonwoven web continuously discharged by a nonwoven producing means at a constant speed, wherein the nonwoven web is longitudinally drawn on a path between the nonwoven producing means and the fleece laying machine in a cyclically recurrent drawing process in adaptation to the laying movements of the fleece laying machine, and a speed at which the fleece laying machine receives the nonwoven web is synchronized with a speed at which the nonwoven web leaves the drawing process.

A device for manufacturing a fiber fleece from a nonwoven web, which is discharged continuously by a nonwoven producing means at a constant speed, and a fleece laying machine to which the nonowoven web is supplied, wherein the fleece laying machine is driven at a constant nonwoven transport speed and performs laying movements, said device further comprising:

• a controllable drawing equipment, which is arranged between the nonwoven producing means and the fleece laying machine and through which the nonwoven web is passed, and which is adapted to draw the nonwoven web in a longitudinal direction, means acting onto the drawing equipment in the sense of a change of a drawing effect exerted onto the nonwoven web depending on the laying movements of the fleece laying machine, and buffer storage means, which are arranged at least on a side located upstream and downstream of the drawing equipment in vicinity to the drawing equipment.

A device for manufacturing a fiber fleece from a nonwoven web, which is continuously discharged by a nonwoven producing means at a constant speed, a fleece laying machine to which the nonwoven web is supplied and which carries out laying movements, wherein a controllable drawing equipment is arranged between the nonwoven producing means and the fleece laying machine through which the nonwoven web is passed and which is adapted to draw the nonwoven web in the longitudinal direction, the device further containing:

• means, which act on the drawing equipment in a sense of a cyclic change of a drawing effect exerted onto the nonwoven web depending on the laying movements of the fleece laying machine, and means, which synchronize a speed at which the fleece laying machine takes in the nonwoven at a speed at which the drawing equipment outputs the nonwoven to be drawn.

Drawing apparatus for drawing a nonwoven web, the drawing apparatus comprising at least two disk draw rollers arranged in parallel to each other, each disk draw rollers comprising a plurality of disks arranged in mutually spaced distances, thereby forming gaps between adjacent disks, the mutual distance of said disk draw rollers being adapted such that the disks of the one disk draw rollers project into the gaps between the disks of the other disk draw rollers, wherein supports are arranged opposite to each of the disk draw rollers, each support forming a gap with the respective disk draw roller though which the nonwoven web is passed and compressed thereby, each support being selected from a group that comprises a rubber belt, a perforated belt, a perforated roller, and a supporting disk roller, and the disk draw rollers have circumferential speeds that cyclically have a difference in a nonwoven passing direction.