| 摘要 |
A method and apparatus for three-component asynchronous stretching and dynamic configuration of yarn count and blending ratio. The apparatus comprises a stretching and twisting system. The stretching system comprises a level one stretching unit, a level two stretching unit, and a merging and twisting unit that are in a front-to-rear arrangement. The level one stretching unit comprises a combined rear roller (11) and a middle roller (3). The level two stretching unit comprises a front roller (1) and the middle roller (3). Per the method, the ratio at which three components are mixed and dynamic changes of yarn density are controlled via a level one asynchronous stretching mechanism, and the magnitude of a reference yarn density is controlled via level two synchronous stretching. The method and apparatus not only allow precision control of changes in yarn density, such as the shape of slubs attached onto a reference yarn, but also allow precision control of changes in yarn color, such as the colors of the slubs and of the reference yarn thereof. At the same time, by controlling the middle roller to rotate at a set constant speed, reproducibility of the pattern and color of a yarn of variable yarn density is ensured, and yarn-spinning effects are improved. |
