SEPARATING SLIVER INTO SMALL FIBER ASSEMBLIES BY AIR SUCTION

Abstract

Separating the sliver into small fiber assemblies is very important in open-end spinning. In this report, the relations between the sliver irregularity and the variation in the weight of separated fiber assemblies were investigated. The sliver having periodic irregularity were separated only by air suction without combing roller, and then the weight of separated fiber assemblies are detected and recorded continuously. The variation in the weight of fiber assemblies are statistically analysed.The results obtained are as follows:(1) By using the experimental apparatus, the size and the number of fiber assemblies flying with high speed can be measured sensitively.(2) The thinner the input sliver becomes, the more easily the sliver is separated into smaller assemblies. (Fig. 4)(3) In variation of separated fiber assemblies, both the random variation and the periodic variation are recognized, though the random variation is very small in the input sliver. When the sliver irregularity becomes large, the ratio of periodic variation to total variation increases. (Fig. 10)(4) The crosscorrelation coefficient between the input sliver irregularity and the weight variation of separated fiber assembly is less than 0.5, and increases with sliver irregularity. (Fig. 12)