Rieter

Fine cleaning integrated in the card chute

Index

With this solution, fine cleaning has been transferred to the  card chute. The existing opening position is supplemented with a mote knife.

The result is:

  • a card chute with integrated fine cleaning;
  • the high production load of the blowroom is now distributed over several cards;
  • fine cleaning is performed very gently at considerably lower production rates compared to the blowroom;
  • yarn quality is improved; for example, imperfections (thick places, thin places and neps) are usually reduced and short fiber content improves.

Mode of operation (Fig. 94):

  1. Fiber tufts are fed uniformly to the card chute with integrated fine cleaning.
  2. The fiber tufts are separated from the transport air in the upper section of the card chute (1, 2) and form  an initial homogeneous batt.
  3. A feed roller with a feed trough (4) and a needled cylinder (3) produces small tufts and thus a large tuft surface.
  4. The integrated mote knife immediately eliminates the exposed trash particles.
  5. The released tufts are blown into the lower section (5) of the shaft by means of an additional controlled air current and condensed there into a homogeneous batt.
  6. The perforated rear wall at this point permits additional dedusting of the tufts.

Fig. 94 – Fine cleaning in the card chute