By Tasnim N. Shaikh, Someshwar S. Bhattacharya
Ring spinning is an age-old know-how utilized in the method of fibres to yarn conversion. Its versatility in facing quite a lot of fabrics by way of variety, houses or even as a person or combination is unbeaten. This ebook offers a platform for severely comparing quite a few engineering and technical adjustments passed through during this mythical approach and the clinical technique mendacity at the back of those changes.
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Additional info for Engineering Techniques of Ring Spinning (Woodhead Publishing India in Textiles)
Lappet iii. Thread guide rail Thread guide: The thread guide is made up of round steel wire of 4 mm diameter with a very smooth surface. The guide eyelet is formed by bending the wire around a circle, in which the outer end of the wire overlaps the start of the circle for about 90 degree. The diameter of an eyelet so formed is of 5–6 mm, to prevent retardancy to the twist running up to front roller nip. The wire is then bent downward and outward. Slanting downward portion of guide wire has notch just above the bottom end, acts as slub catcher.
13 Significance of drafting system inclination Drafting system is inclined at 30–45° on old ring frame and by 60° on new one. Inclination of the drafting system offers benefits at two major ends: i. Economy of spinning by saving in floor space and ii. Ensures twist flow closer to the front roller nip. Floor space saving: Machine width gets reduced with the inclination of the drafting system. So, number of ring frames accommodated in a given mill space will be high. Saves the total floor space occupied and thereby capital cost of spinning.
They are developed by companies like Rieter and Sussen. Hence these clips are designed to define vertical distance between apron nips also marketed as distance clip by SKF. They are made of an extremely wear-resistant plastic material and replaceable. Different thickness clips are available to meet required apron nip value. 2) is given to the different size spacers by the manufacturers for ensuring its correct selection even by the unskilled labour. 8 Roller stand Roller stand (Fig. 10) is the supporting frame designed for housing drafting system variables like bottom rollers, traverse guide and pressure arm.