Soft knitting yarn at low costs

By Irene Muggler

Due to the increased demand for soft knitting yarn， Rieter customer Xinjiang Kangruixin Textile Co. Ltd. wants to increase production. At the same time， the Aksu-based company from the Xinjiang province， China， also faced pressures to save energy and personnel costs.

Xinjiang Kangruixin Textile Co.， Ltd. （Kangruixin）， a fully invested subsidiary of Henan Shenqiu Sanzha Textile Co. Ltd.， operates 50 000 ring spindles， 640 semi-automated rotor units and 260 sets of high-speed rapier looms. The company employs more than 800 people. Kangruixin covers the complete home textile process with its production chain from design， R&D;， through spinning and weaving， right through to dyeing and finishing.

The challenge： increased production with lower costs

Kangruixin has faced increasing pressure in recent years. There was a need to reduce energy consumption for ring spinning and save labor. To increase the production of high quality， soft yarn， the management focused on 100% virgin cotton and aimed for a shorter spinning process. At the same time， however， Kangruixin also wanted to meet the demand for yarn with lower twist， stable yarn evenness and consistent yarn strength.

The solution： R 66 rotor spinning machine

Kangruixin has invested in seven fully automated Rieter rotor spinning machines R 66， each with 600 rotors. These machines are equipped with spin boxes S 66， which are at the cutting edge of rotor spinning technology.

They feature unique functions including BYpass， SPEEDpass， CHANNELpass and TWISTunit. These allow stable running condition of the R 66 and a constant yarn quality. The robots with the VARIOclean units efficiently clean the rotor and the rotor groove before each single piecing operation. With the high degree of automation of the R 66 Kangruixin requires fewer operating personnel. With the R 66， the requirements of the customer were completely fulfilled.

More yarn with low energy consumption

The R 66 produces 25% more yarn compared to the semi-automated rotor spinning machine. The energy consumption per kilogram of yarn is 64% lower when compared with ring spinning production – also thanks to the energy-saving ECOrized drive technology.

The quality of the yarn produced is consistently high because of the new spin box S 66 technology. The machines run relia-bly and are easy to operate.

The number of operating personnel could be reduced by 75% compared to the ring production. The customers of Kangruixin are very pleased with the quality of the yarn. On a regular basis， they are able to sell the yarn above the cur-rent market price.