| 摘要 |
<p>PROBLEM TO BE SOLVED: To ensure that the drawframe-treated roving is bunched smoothly even when it is composed of long-staple fibres. SOLUTION: This drafting unit for spinning device comprises two delivery rollers 1, 2 defining between them a delivery nip 3 for at least one drawframe- treated roving 4, one of them forming a deflection length 5 with a slot-shaped suction zone 6 for the roving 4 exiting the exit nip 3, which extends between the delivery nip 3 and a pressure roller 7 arranged downstream in the sense of deflection, and has an air nozzle 8 offset sidewards with respect to the suction zone 6 for a blast of air directed towards the delivery roller 1 with a flow component transverse to the suction zone 6 which extends in an arc-shaped path between its feed end and its discharge end with the air nozzle 9 on the inside of the arc. An additional air nozzle 9 associated with the pressure roller 7, which has a flow component transverse to the suction zone 6, is provided on the inside of the arc of the suction zone 6.</p> |
