抄録
The effect of shapes of air canals along the chase is investigated to find an effective method for yarn end retrieving from the point of energy-saving, by using cylindrical, conical or intermediate air guides as hoods. The flow patterns in the axisymmetrical canals between the bobbin and the hood attached to it can be understood by the conclusion of the previous paper thet the retrieving effect is dependent on the vertical component of the accelerated flow.
Experimental results here obtained show that, when the ratio of the minimum cylindrical inner diameter to the diameter at the skirt entrance is 0.79, the flow pattern would become very effective to retrieve yarn ends from the conical surface of the bobbin.
