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Low energy pre-cleaning with the CL-X

Optimised fibre air flows and separation reduce power consumption.

12th July 2021

Innovation in Textiles
 |  Mönchengladbach, Germany


In fibre opening operations, the new Trützschler CL-X pre-cleaner gently and reliably removes coarse contaminants like leaf debris, stalks or seeds from cotton with the minimum loss of good fibres, improving efficiency and laying the foundation for a high-quality end-product before the cotton is further processed in mixers and fine cleaners.

The lower energy consumption of the CL-X is significant at a time when rising energy prices are becoming an increasingly important factor in the competitiveness of spinning mills.

“During the development of the CL-X, our main focus was on optimising the fibre air flows,” explains Robert Többen, head of mechanical engineering at Trützschler “By forcing the air flow over two rolls in a spiral, we have found a solution that allows lower power consumption at the opening rolls.”

In comparison with a current benchmark machine, the CL-X saves up to 30% in energy consumption. In addition to the optimised flow, an integrated air separator contributes to reducing the transport air by ensuring that only excess air has to be removed, rather than all of the air. Less exhaust air means less energy consumption.

The CL-X also provides significantly increased productivity. At a maximum of 1,600 kilograms per hour, the production rate from one CL-X corresponds to the rate achieved by two Trützschler CL-P models. This gives customers the flexibility to operate at high or low productivity rates with a single machine.

Trials conducted at a Turkish customer have also shown that the CL-X reached a nearly three times better cleaning efficiency compared to the benchmark unit. The improved grid geometry enables better separation and gentler tuft handling and a 2.6 metres long cleaning section provides a maximum degree of opening and cleaning of tufts.

The lot management system enables direct, automated coordination with the BO-P bale opener. The speeds of the opening rollers and the position of the grid bars – and thus the intensity of the cleaning – are automatically adjusted to the changing material being fed into it.

Due to the stepless and individual adjustment of grid devices for each opening roller, the machine can react to a wide variety of impurities. A 10% higher speed of the second opening roller causes different speeds along the grids, while different sizes of waste can also be separated.

The Wastecontrol waste sensor is now also integrated into the CL-X and ensures that waste is reliably separated during production, which avoids the unnecessary loss of valuable fibres. The operator automatically receives a recommendation for the ideal setting via the machine’s display and can implement it with just a few clicks.

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