| 摘要 |
<p>The invention relates to a roving machine for producing a roving (1) from a fiber sliver (2), wherein the roving machine comprises at least one spinning station (3) which has a vortex chamber (4) with an infeed opening (5) for the fiber sliver (2) and a roving forming element in the form of a spindle (6) that has an inlet port (10) and extends at least partially into the vortex chamber (4), wherein the vortex chamber (4) is associated with spinning nozzles (19) through which air can be guided into the vortex chamber (4) in order to impart, after a piecing process, a protective twist to the fiber sliver (2) in the region of the inlet port (10), and wherein the spindle (6) has a draw-off channel (9) via which the roving (1) provided with the protective twist can be drawn out of the vortex chamber (4). It is proposed according to the invention that piecing nozzles (8) are additionally associated with the vortex chamber (4), wherein each of the piecing nozzles (8) has a flow direction which is aligned in the direction of the inlet port (10) of the spindle (6). Furthermore, proposed is a method for piecing a fiber sliver (2) on a roving machine serving for producing a roving (1), which is characterized in that during the piecing process, the fiber sliver (2) is moved by means of the air flow generated by the piecing nozzles (8) in a linear movement into the draw-off channel (9), and wherein by means of the air flow, a protective twist is imparted to the fiber sliver (2) in addition to the linear movement.</p> |
