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The Trash Box

  • Fig. 1 & 2 respectively , show that the opening-roller clothing {12} & {23} can have a right hand or a left -hand spiral winding when fitted to the roller drum.
  • In either case, trash that is ejected can rebound back into the path of the fibre flow & travel onto the rotor groove.
  • What is required is for the trash particles either to enter directly into the trash box {10} or to do so after deflecting from the wall {8} & {9} of the box.
  • Once in the trash box, the trash can be sucked away via the exit {11} .
  •  If a high suction rate is used, there is a reduced chance of the trash particles rebounding back into the fibre flow. However, increased suction can  result in fibres also removed from the flight path to the rotor .
  • Fig.3 illustrates one approach of many for improving the system.
  •  The broken lines represent the trajectory of the trash particles. Increased air-suction is provided for by an additional inlet {14},     positioned  away from the fibre flow.
  • Although this problem alleviates the problem of rotor - fouling by the prevention of the build-up of fly.
    Fig.4 shows an interesting design patented by schubert & salzer.
    It involves a tapered trash chamber with two additional openings 220 & 24.
    The first 220 is an added air inlet; The second 24 is to facilitate the provision of a continuous low suction rate.
    By these means , the fine dust & fly can be removed without interruption of smooth flow of fibres to the rotor.
    The heavier dirt & other impurities are removed at the lower end of the trash chamber.
    A fairly unique approach to the dust problem is to remove the dust immediately fibres are separated from the sliver.
     Fig.5 shows that , as soon as fibres are removed from the sliver , they are subjected to a light suction, through the opening af1, intended to remove the light dust particles.
    The heavier trash particles are then removed as usual at 5.A second opening , af2, exposes the presumably now cleaned flow of fibres to an inlet of air sufficient to straighten the fibres while accelerating them onto the rotor.

 

 



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