Importance of spindle speed in ring frame

In textile industries, spinning sector plays a vital role because this sector produces the main raw material for the textile industries which is known as yarn. So for getting good qualities garments, it is needed to ensure the good qualities yarn. There are many things which are re-sponsible for producing good qualities yarn. Among these spindle speed is an important thing. One must have to change the spindle speed, when he changes the count. As every count has a particular spindle speed in which the production shows maximum production efficiency. Here we used five most commonly used yarn counts in the maximum factories. The counts are 15 Ne, 20 Ne, 25 Ne, 30 Ne and 40 Ne. We analyzed these counts with different speed and found that every count showed maximum efficiency at a particular spindle speed. The out-come of this paper is applicable in all types of ring frame machine , especially for producing single carded and combed yarn.

Optimization of Spacer Size and Degree of Shore Hardness on Yarn Quality in Ring Frame Machine

This study was mainly focused on the optimization of spacer size and degree of shore hardness in ring frame drafting systems to improve yarn quality parameters. The 100% cotton fiber carded yarn samples of 35.5Nm were produced to analyze the effect of spacer size and degree of shore hardness with different combinations. The spacers were 4.2 and 4.5 mm and the shore hardness was 70 back & 62 front and 70 back & 65 front. All yarn samples of the same count were produced on the same spinning positions by changing the spacer’s size and degree of shore hardness by keeping all other parameters constant. The produced samples were tested according to standard testing methods and instruments. After testing, the tested results were compared to analyze the influence of spacer size and shore hardness on yarn quality in a ring spinning frame. The technologist needs to understand this and act on it to optimize the yarn production. The specific size of the spacer with specific shore hardness should be used for a particular count of yarn. The results showed that yarn quality i.e. U%, Cvm, Neps +200%/km, Thick +50%/km, Thin -50%/ km, TIPI are considerably influenced by the spacer size with different shore hardness. So it is concluded that the best result has been obtained in the case of using a pink color spacer (4.2mm) with 70 degrees back and 65 front degree front top rollers.

Investigating the effects of some process parameters on the quality of coarse compact yarn produced from carded roving

This project work aimed to investigate the interactive effects of carded roving parameters (i.e., roving hank and twist) and break draft of ring frame on the quality of compact yarn such as evenness, strength and hairiness. However, in this work, compact spun yarns produced from carded roving hanks of 0.70Ne and 0.90Ne while the roving twist per meter inserted at two levels (i.e., 40 and 45) for each of hank. Moreover, the break draft values of ring frame kept at three levels (i.e., 1.15, 1.25 and 1.35) for each type of roving. However, 100% cotton compact yarns of 24Ne and 32Ne produced for this experimental investigation. However, results showed that yarn unevenness (U%) and imperfection index (IPI) values of compact yarn decreased for the finer roving hank (0.90Ne) irrespective of yarn fineness. It was also noticed that low twisted roving improved yarn evenness during coarser yarn (i.e., 24Ne) production. Regarding the count strength product (CSP) value, increasing levels of roving twist deteriorated the CSP results in general. Trend of CSP results also revealed that finer roving produced higher levels of CSP results for comparatively finer yarn production. As far as yarn hairiness is concerned, it was observed that finer roving (0.90Ne) having higher levels of twist reduced yarn hairiness irrespective of yarn fineness without any exception. Finally, it can be said that this study will help the researchers for comprehending the influences of the process parameters during the production of compact yarn from carded roving.

Modal–Cotton Fibre Blend Ratio and Ring Frame Parameter Optimisation Through the Taguchi Method

The influence of Modal–cotton (MC) fibre blend ratio and ring frame machine parameters such as front top roller loading and break draft on the blended yarn properties has been studied. Compact MC blended yarn samples of 14.75 tex with three different MC fibre blend ratio has been produced in a LR 6 ring spinning frame fitted with Suessen Compact drafting system. A robust design optimisation to minimise the variations of the output yarn properties such as blended yarn tenacity, yarn unevenness and hairiness caused because of the variations in the material as well as machine setting parameters is achieved through the Taguchi parametric design approach. It is found that the maximum compact MC blended yarn tenacity is 23.76 g/tex, which is influenced very much by MC fibre blend ratio but meagrely by top roller loading and break draft. Similarly, the minimum 9.54 U% and 3.59 hairiness index are achieved with 100:0 and 70:30 MC fibre blend ratio, respectively, at 23-kg top roller loading. Statistical ANOVA analysis is performed on the results and optimum values are obtained within the 95% confidential level through confirmation experiments.