Consistent sliver quality at all times
The patented sliver guide from Rieter which also comes with the SB-D 50 guarantees centric sliver guidance and consistent sliver quality at all times. The most common error that occurs with conventional sliver guides is a non-centric guidance of the sliver. The reason for this is that the sliver guides in front of the drafting unit are often wrongly adjusted leading to uneven drafting and creating also thick places. This is avoided with the patented sliver guide from Rieter. It ensures that the web width is reproducibly set by simple turning of the guide elements (Fig. 2). The geometry of the 4-over-3 drafting system allows close cylinder spacing and therefore also good processing of short fiber lengths. Additional fiber guides in the main drafting field prevent lateral slipping of the edge fibers. Fewer disturbing faults in the yarn are the result.
Perfect in coiling
The SB-D 50 has the right coiler for different needs. CLEANcoil is the standard coiler for all fiber materials and therefore offers maximal flexibility. The spiral coiling tube ensures coiling which is free of drafting faults, even at high delivery speeds. A honeycomb structure on the coiler underside reliably prevents deposits.
For the processing of 100% polyester, the latest development CLEANcoil-PES with a new type of coating offers unique advantages in coiling. Even with critical polyester fibers, the cleaning cycle can be extended by at least 100% compared to the standard coiler. This also leads to more consistent sliver and yarn quality.
Unique sensor for exact first sliver coils
Cans with plates that are too low are annoying in most spinning mills. They lead to tangles and also to breaks when drawing the sliver out of the can in the subsequent process. The SB-D 50 solves this problem with a contact-free precision light barrier (patent pending). It detects when the first sliver coils make consistent contact with the coiler and only then switches the machine from the slow mode to full production speed (Fig. 3). This guarantees controlled sliver coiling also in cans where the plates are too low, and ensures consistent sliver and yarn quality. At the next process stage the cans therefore run without interruption until they are completely empty. This maintains machine efficiency at a high level, reduces operator intervention, eliminates sliver waste and keeps quality on a consistent level.
Even when only a small number of can plates are too low in a spinning mill, the new sliver sensor brings considerable advantages. Assuming 5% of the annual filled cans are affected, it sums up to more than 3 600 cans for each draw frame. This leads to about 2 300 kg of waste which can be avoided by the sliver sensor.
Reliable sliver separation without additional mechanics
Materials with a high fiber-to-fiber cohesion, like for example 100% polyester, need a sliver separation between filled and empty can for a trouble-free can change. Other products require a rather complex mechanical device here which causes wearing costs and comparably difficult settings. The SB-D 50 has a more elegant solution for this: Between the drafting system and the draw-off calendar a thin place is generated which is transported below the coiler and deliberately breaks at can change – without the need for additional parts.
Simple setting of suction intensity is a standard
Trash and dust on the pressure bar lead to sliver funnel blockages and impair the quality of the yarn. The efficient suction concept from Rieter ensures that – through the lifting of the cleaning lips − trash accumulations are removed directly via the suction. Practical tests confirm fewer sliver funnel blockages. The increased yarn cleanliness is shown in reduced imperfections and Classimat faults as well as in lower number of yarn clearer cuts.
Only on the Rieter draw frame, the operator can set the suction intensity easily and rapidly on the machine display as a standard. The setting is easy to reproduce. This simplifies not only material change but also eliminates quality deviations when, for instance, several draw frames are feeding sliver to one assortment.
Easy operation and rapid assortment changeover
The SLIVERprofessional expert system is integrated in the machine. The direct adoption of setting recommendations allows a rapid assortment changeover with best sliver quality which can easily be done even by less trained operators. It comprises a convenient setting of the delivery speed, coiler speed and suction intensity on the touchscreen via frequency-controlled drives (Fig. 4). High visibility LEDs indicate the condition of the draw frame and further simplify the work for the operator. A colored touchscreen facilitates intuitive operation.
For further information, please contact:
Rieter Management AG
Head Group Communication
T +41 52 208 70 45
F +41 52 208 70 60
[email protected] / www.rieter.com