Business

Rieter Offers To Improve The Product Quality On Existing Draw Frames And Rotor Spinning Machines

With the development of electronics technology, it has found extensive use in textile machinery and many mechanical systems become electronic. This has been the trend in Rieter machines as well and the company now offers to improve its earlier models through simple conversions. Rieter offers retrofit packages for its older Draw Frames and Rotor Spinning machines which can substantially improve the sliver quality and secure the yarn quality. For the draw frames RSB-D30, RSB-D30c, RSB-D35, RSB-D35c as well as SB-D10 and SB-D15 Rieter offers conversion packages to improve the sliver quality. Older rotor spinning machines R1, R20 and R40 profit from the new yarn monitor.

Guaranteed and consistent sliver quality on Rieter draw frames

The conversion package for autoleveling draw frames RSB-D30, RSB-D30c, RSB-D35, RSB-D35c includes the maintenance-free PRESSUREguard (Fig.1). It monitors the pneumatic for the pressure load of the scanning discs by means of an electronic pressure gauge and a relay. With faulty pressure load, the draw frame immediately switches off. This avoids uncontrolled and inferior sliver quality. The advantage over the old system is the digital display panel which shows not only the pressure load but also other fault notifications, which simplify elimination of the cause. A lamp outside the draw frame aids rapid fault elimination by emitting a signal.

A further conversion package for the autoleveller draw frames mentioned above as well as for the draw frames SB-D10 and SB-D15 without autoleveling includes the speed sensor B2 EVO+. The customer benefits from perfect sliver quality based on a correct drafting of the slivers. The new non-contact speed sensor takes measurements without making contact in contrast to the previous model and at a greater distance on a massive gear rim. It is therefore better protected against damage. Over a longer period this ensures correct measurements and a good sliver quality. Further, an additional sensor (B200) for monitoring draw-off roller drive belt is provided to avoid production of faulty sliver due to belt breakdown. The B2 EVO+ non-contact inductive sensor with the optoelectronic light scanner B200 (Fig.?2) is easy and quick to assemble. Also, the existing mounting points of the previous B2 rpm transmitter can be used to fit them.

Correct and consistent monitoring of the yarn quality

For the rotor spinning machines R1, R20 and R40, Rieter offers a new yarn monitor BFW EVO. It is based on the engineering and technology of current R60 yarn monitor and thus reflects the latest technical developments (Fig. 3). The yarn monitor is a fully compatible replacement of the former FW 15 model. The electronics of the new yarn monitor are contained in a hermetically sealed plastic casing. This prevents the entry of fibre and dust. In particular, with the processing of Viscose it has the advantage that no sulphur / sulphide can form on the solder points. The solder points remain unaffected and the functionality of the yarn monitor is completely assured. The integrated optical sensor monitors the yarn path through the transparent casing. The yarn monitor BFW EVO secures a correct and consistent monitoring of the yarn quality.

The electrical connection of the yarn monitor is made via the existing “plug-and-play” system. This makes individual replacement on each spinning position possible without having to switch off the machine. As the signals and LED colours are also the same with the previous model, a combined operation of the old and new yarn monitors is guaranteed. Rieter claims that these simple and cost-effective solutions for the draw frames and rotor spinning machines pay off in shortest time period.