Rieter Draw Frame Mini Kit Reduces Imperfections by 14%
After many years of successful operation, Shri Rohit Spinners Pvt. Ltd.’s autoleveler draw frames began to show signs of wear and tear. Seeking to improve efficiency, the company implemented the Rieter draw frame mini kit, which resulted in a notable 8% reduction in sliver unevenness, a 52% decrease in deviation rate and a 14% improvement in yarn imperfections.
“After installing the draw frame mini kit, we saw substantial improvements in both sliver and yarn quality. The reduction in sliver deviation rate and yarn imperfections were remarkable.” says N Velusamy, General Manager, Shri Rohit Spinners Pvt. Ltd., India.
Maintenance is key to success
Shri Rohit Spinners Pvt. Ltd. is a renowned producer of premium-quality polyester yarn. The ageing RSB-D 22 autoleveller draw frames combined with increasingly tough market requirements for good and, above all, consistent yarn quality became a challenge. After many years of successful operation, the machines began to show signs of wear and tear. Shri Rohit struggled to balance quality control with an optimal maintenance budget. Additionally, the customer encountered difficulties in sustaining machine efficiency, largely due to a reliance on corrective maintenance practices. This situation is common among many mills. A strategic investment in the right parts, however, can provide a sustainable and efficient solution, ensuring long-term cost savings while enhancing operational efficiency.
Rieter’s structured and simple maintenance approach
The after-sales team of Rieter provided a modular maintenance concept designed to offer a structured and simple maintenance approach. This concept consists of three kits: the mini kit, the performance kit and the overhaul kit. Shri Rohit Spinners implemented the draw frame mini kit to its RSB-D 22. The kit consists of key consumable components from the scanning and drafting zone, which have a lifetime ranging from one to three years depending on the raw material and process parameters.
The aim of the draw frame mini kit is to enhance sliver quality and increase machine efficiency by minimizing machine downtime. Key components like belts, top roller cots, clearer lips, grease and clearer plates are crucial in achieving optimal sliver quality and uninterrupted production.
Significant improvement in sliver and yarn quality
Following the installation of the draw frame mini kit on the RSB-D 22 machine, Shri Rohit Spinners experienced a significant improvement in both sliver (Fig.3) and yarn quality. Sliver unevenness (U%) and the coefficient of variation (CV%) were reduced by 8%. The 52% reduction in deviation rate (DR%) in the sliver helps to achieve better yarn evenness, which improves yarn strength and therefore results in a more uniform fabric appearance. In addition, yarn imperfections (IPI) dropped by 14% and classimat faults were reduced. In closing, N Velusamy says: “We thank the Rieter After-Sales team for providing this effective maintenance solution.”
The draw frame mini kit is compatible with various models, including RSB-D 50, RSB-D 45, RSB-D 40, RSB-D 26, RSB-D 24 and RSB-D 22.
