| 摘要 |
A spinning machine is disclosed, which generally comprises a spinning rotor having a frusto-connical fiber sliding surface consisting of a first fiber sliding portion, onto which discrete fibers are first supplied, and a second fiber sliding portion connected to the first fiber sliding portion, a bottom surface, and a fiber collecting groove formed between the second fiber sliding portion and the bottom surface. The spinning machine further comprises a yarn take-up tube centrally extending into the spinning rotor to take up a spun yarn therethrough. The first fiber sliding portion forms an angle ( alpha ) with a plane of rotation of the spinning rotor larger than an angle ( beta ) formed by the second fiber sliding portion with respect to the same plane. The bottom surface of the spinning rotor includes a fiber guide portion, which forms the fiber collecting groove in cooperation with the second fiber sliding portion and is inclined at an angle ( delta ) with respect to the plane of rotation. This angle ( delta ) is so selected as to fulfill the condition delta = epsilon +/- about 5 DEG , where angle epsilon is a measure of the inclination of the yarn taking off line, with respect to the plane of rotation, connecting the lowermost point of the yarn take-up tube with an intersection of the second fiber sliding portion and the fiber guide portion.
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