Constant Joining Material in Air Vortex Spinning Methods

Abstract

The present application relates to a method for operating a drafting arrangement ( 1 ) for drafting a fibre composite ( 2 ). For this purpose, the drafting arrangement ( 1 ) has at least one front pair of rollers ( 3 ) and one rear pair of rollers ( 4 ) having a nip line ( 5 ), a fibre composite end ( 6 ) being present for operating the drafting arrangement ( 1 ). According to the invention, when the drafting arrangement ( 1 ) is put into operation, the fibre composite end ( 6 ) enters the nip line ( 5 ) of the rear pair of rollers ( 4 ) only when the build-up arising from acceleration has ended in the rotational speed profile of the front pair of rollers ( 3 ) and in the rotational speed profile of the rear pair of rollers ( 4 ).

1 . Method for operating a drafting arrangement ( 1 ) for drafting a fibre composite ( 2 ), the drafting arrangement ( 1 ) containing a front pair of rollers ( 3 ) and a rear pair of rollers ( 4 ) having a nip line ( 5 ), and a fibre composite end ( 6 ) being present for starting up the drafting arrangement ( 1 ), characterized in that, before the drafting arrangement ( 1 ) is put into operation, the fibre composite end ( 6 ) is brought to a predetermined distance from the nip line ( 5 ) of the rear pair of rollers ( 4 ), this distance preferably amounts to up to 6 mm, this distance preferably amounts to 0.1 mm to 5 mm, this distance particularly preferably amounts to 3 mm or 4 mm, and the bringing to a distance is preferably carried out by the fibre composite end ( 6 ) being cut to length.  
     
     
         2 - 13 . (canceled)