Fleissner Gmbh

Trützschler Nonwovens Gmbh

Ulrich Münstermann

The nozzle beam is arranged on a device for generation of liquid streams for the treatment of fibres of a material web running along the nozzle beam. The nozzle beam comprises an upper piece (), running across the working width of the web and a lower piece (), which runs out into a liquid outlet slot (). According to the invention, a nozzle strip () is arranged below the liquid outlet slot () and an easily detachable so-called masking strip () is mounted directly above the above in a liquid-tight manner, when viewed in the flow direction of the water jet. A part of the nozzle outlet opening on the nozzle strip is covered by the masking strip () and a part is left free, whereby liquid jets emerge from the part left free and form a continuous liquid curtain. According to the invention, a nozzle strip () with a maximum stream width is fitted to the nozzle beam. When a reduced stream width is required, a corresponding masking strip () is fitted which covers the non-required nozzle drillings in the outer regions of the nozzle strip (). A simple and economical adjustment of the working width is thus possible, only that energy required for the process is used and the components guiding the material web are protected. Furthermore, the splash water flow into the plant is avoided.

Nozzle beam with means for setting working width and method for setting working width of a nozzle strip

A nonwoven product is made by passing a fiber web longitudinally along a treatment path and preconsolidating it at an upstream location along the path. Then the web is fully consolidated by liquid jets downstream of the location at longitudinally spaced and transversely extending discontinuous strips each interrupted at least two break points. The web is then fully consolidated by liquid jets downstream of the location at least two transversely spaced longitudinally extending strips extending a full length of the web and crossing the transverse strips at the break points. Subsequently the web is cut up into pieces along the strips.

Growing community of inventors

Egelsbach, Germany

Ulrich Münstermann