Effect of Sharpness of Tooth Point of Top Card Clothing on Carding Efficiency

This paper is related to the study on the influence of the top card clothing with highly sharpened tooth point on the carding efficiencies such as carding action, removing trash and so on.The top card clothing with sharpened tooth point i.e.a new type of the top card clothing is compared with anold one.The follwing results are obtained by the experiments mentioned above.(1) The number of neps in the sliver made by the new type of top card clothing is much less than that by the old one.(2) The number of trashes in the sliver made by the new type of top card clothing is much less than that by the old one, when the new type has not yet warn out.(3) Trash content and lint content in the top waste with the new type of top card clothing remain approximately constant irrespective to test conditions.(4) Coefficient of kinetic friction between the tooth point and the fibre becomes higher when the tooth point is more sharpened.(5) Orientation of fibre on the top flat are improved when the tooth points is more sharpened.From the above results, it is concluded that the sharpened tooth point of the top card clothing is improved for carding.