Reliability is key in the production of sliver. The new generation of draw frames is more robust than ever. This ensures stable operation at highest quality and productivity. With the new draw frames – consisting of the single-head draw frames RSB-D 55 and SB-D 55 and the double-head draw frames RSB-D 27 and SB-D 27 – Rieter offers optimum solutions for a wide range of spinning mill needs.

Optimised for Recycled Fibres

Processing recycled fibres poses challenges like increased dust generation and a high short-fibre content. The new Rieter draw frames offer enhanced suction for cleanliness, even in the calender area, resulting in longer cleaning cycles and fewer thick places. When recycled fibres are processed, four-fold doubling can be supportive. Here, an additional web nozzle improves web guiding and guarantees fault-free operation with a high short-fibre content. These optimisations bring advantages in the production of ring yarns with a high recycled fibre content. Moreover, recycled fibres can now be selected as an application in the expert system SLIVERprofessional, providing recommended settings for the entire machine based on raw material data.

User-Friendliness at a New Level

With an improved menu navigation and a convenient 10-inch display, operating Rieter draw frames is now even easier (Fig. 1). The SLIVERprofessional expert system provides suggestions for key setting parameters like coiler and can plate speed, as well as sliver spread before the drafting system. This allows quick material changeover and ensures excellent sliver and yarn quality.

New Level of Durability

The new generation of draw frames ensures stable operation at the highest quality and productivity. Examples for this are new life-time lubricated top roller bearings and reinforced power creel rollers. In addition, the drafting system has been improved thanks to a new force transmission which optimises the load on the outlet cylinder.

Constant Sliver Quality

An innovative optional solution on the autoleveler draw frames RSB-D 55/27 keeps the sliver strength constant while stopping and starting the draw frame. It prevents the creation of a short length of sliver with around 50 per cent lower sliver strength. This was previously unavoidable and occurred on all draw frames. When processing combed cotton on the roving frame, this can lead to undesirable incorrect drafts. The resulting thin place in the roving continues into the yarn.

Fewer Sliver Breaks

The autoleveler draw frames also offer a unique solution to avoid blockages in the coiler tube caused by temperature fluctuations or bulky materials. A single-motor-driven coiler eliminates sliver jams without interruptions. This reduces operational effort, prevents sliver breaks, and maintains high efficiency also in downstream processes.