空心锭假捻对羊毛圈圈纱圈圈密度的影响

为了在使用空心锭花式纱线纺纱机生产羊毛圈圈纱产品时,纱线圈圈花型保持丰满的同时纱线手感柔软,使用经过改造的空心锭花式纱线纺纱小样机纺制了7种不同捻度的羊毛圈圈纱;分别对不同捻度下纺制所得圈圈纱圈圈密度进行统计并对比,发现空心锭假捻的变化对羊毛圈圈纱的圈圈密度有一定影响。结果表明:采用新型空心锭花式纱线纺纱机生产羊毛圈圈纱时,在合理的纱线捻度范围内,空心锭假捻越大,生产的羊毛圈圈纱圈圈密度越大。

花式捻线工艺参数对圈圈纱成圈直径及密度的影响

本文通过改变花式捻线过程中前罗拉线速度与输出罗拉线速度的比值、捻度等圈圈纱纺纱工艺参数的实验,研究花式捻线工艺参数的变化对圈圈纱中圈圈直径以及圈圈密度的影响。为优化圈圈纱生产工艺提供理论依据。

空心锭假捻器的对比探讨

为了花式纱线企业使用空心锭花式纱线纺纱机生产圈圈纱时,能够更加方便快捷地对假捻器进行合理选择,试验在空心锭下方分别安装斜口型、倒三角型、倒T型3种不同类型的假捻器;使用空心锭花式纱线纺纱机纺制两款相同细度、不同原料的圈圈纱;对不同假捻器下纺制所得圈圈纱的圈圈密度进行对比,发现3种假捻器在生产圈圈纱时对圈圈密度有不同影响。结果表明:采用空心锭花式纱线纺纱机生产圈圈纱时,倒T型假捻器生产的圈圈纱圈圈密度最大;斜口型假捻器生产的圈圈纱圈圈密度最小。

Measuring Structural Parameters of Knitted Fabrics by Digital Image Processing Techniques

In the knitting industry the measurements of the stitch density and the stitch length are usually done manually, which may lead to lower efficiency and less definition and also bring subjective ideas into the test results. In order to improve the effect we can measure with Digital Image Processing Techniques. A piece of sample is scanned into computer and changed into a digital image, which is processed with media filtering. To acquire the power spectrum, the image in the spatial domain is converted into the frequency domain. Picking up the characteristic points describing the stitch density and the stitch length separately in the power spectra and reconstructing them, the values of the stitch density and the stitch length could be calculated. When measuring the stitch length, we should establish a geometric model of the stitch based en the digital image processing, which provides a method to transform the stitch length in the two-dimensien space into the three-dimensien space and to measure the value of the stitch length more accurately. This method also provides a new way to measure the stitch length without damaging the fabric.