| 摘要 |
<p>Tearing method in spinning machines, the tearing being suitable to break the segment of roving (12) leaving a drafting unit (11) and held by an aspiration intake (15) following upon a breakage of yarn on the respective spinning unit, the tearing being required for piecing-up of the yarn, the tearing of the roving (12) taking place by a drawing action on the segment of roving (12) between the drafting unit (11) and the intake (15), the drawing action being of a value such as to cause separation of the fibres composing the roving (12) and therefore the breakage of the roving (12). Device to tear roving in spinning machines, the tearing being suitable to break the segment of roving (12) leaving a drafting unit (11) and held by an aspiration intake (15) following upon a breakage of a yarn on the respective spinning unit, the tearing being required for piecing-up of the yarn, the device employing the method cited above, the device consisting of an additional drawing unit (16) for each spinning unit, the drawing unit (16) consisting of a tearing roller (17) and a pressure roller (18) located between the outlet of a drafting roller (13) of the drafting unit (11) and the inlet of the aspiration intake (15), the tearing roller (17) and pressure roller (18) being separated from each other in their inactive positions, one of these rollers (17-18) being secured to means (19) that cause temporary reciprocal approach of the rollers (17-18), one of the rollers (17-18) being powered. <IMAGE></p> |
