Modifications To The Collecting Groove Profile

  • Fig. 2 show typical patented rotor profile.
  • There is a sliding wall { designated 4, 1a, & 12 ,respectively} as shown in figure, there are several angles that characterize the profile of the collecting-groove region.
  •  The angle of the slide wall must not be too shallow or fibre transfer to the groove will be poor, yet not too steep or dust accumulation will increase.
  •  From the point of view of self-cleaning, it is the angles defining the groove itself that have the greatest effect . it is self evident that the more obtuse the angle  of the rotor groove.
  • When the total angle b+e =60 a better cleaning effect was apparent even with front take off .Fig. 1 shows results obtained for both  a 36 & 60 degrees rotor .
  • The 36 rotor collected deposits more rapidly, although with front take-off it had a longer maximum spinning time.
  • The tighter rotor groove was also observed to give better yarn strength.
  • This rotor would therefore be more suited to improving yarn strength than to improving self-cleaning.
  • The narrower angle facilitates greater compacting of fibres & possible contact of yarn , with the rotor bottom surface at 2a giving a good degree of additional binding of surface fibres, all of which add up to improvement in yarn strength.


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