| 摘要 |
<p>A drawing frame with a drawing region or with two independent drawing regions (1, 2) includes, in all, four or more so-called drawing and control rollers. These latter all comprise pressure rollers with barrel rubbers. The control roller (10) situated immediately upstream of the draw-off or «total» drawing roller (7) is arranged in such a position that its periphery is separated from that of the drawing roller (7) by a narrow gap. The rations between the diameters and the speeds of rotation of these rollers (7, 10) are selected in such a way that the peripheral velocity of the «total» drawing roller (7) is significantly greater than the peripheral velocity of the adjacent control rollers (10). As a result, an upwardly directed flow of air is created which removes the floating fibres which would otherwise tend to form windings or so-called «rolls».</p> |
