Rotona ® – a new elastic rotorspun yarn

Rieter is offering the innovative rotor-spun core yarn process. Elastic and non-elastic rotor-spun core yarns can be produced with the BT 904 rotor spinning machine. According to Mr. Rudolf Hehl, Marketing Spun Yarn Systems (Rieter Link 2/04), the Rotona® process for manufacturing rotor-spun core yarns is based on a 30 years old idea. It has been taken up again by Rieter in response to increasing demand for elastic fabrics and

The ComforSpin® machine K 44

implemented as a result of new technical approaches.The BT 904 rotor core yarn machine for producing Rotona yarns is a further development of the BT 903 rotor spinning machine. Its special features are:

• filament, i.e. core yarn delivery mechanism with a continuous draft range of 0.9 - 7.0-fold
• individual sensors and stop device for each filament, i.e. core yarn delivery mechanism
• speeds up to 75 000 rpm
• IQ clean® integrated optical yarn clearer system
• AMIspin® – semi-automatic, electronically monitored piecing system

The production capacity of the BT 904 Rotona machines, which have now been installed for approx. 2 years, is some 400 – 500 tonnes per month. Rotona fabrics are currently produced in a number of large, vertically integrated mills in Europe.

K 44 – Compact spinning competency
In compact spinning, the ComforSpin® machine K 44 is number one in terms of both technology and market placement.

Mechanically, it is based on the G 33 ring spinning, of which more than 1,500 are in operation

Newly designed high-performance card C 60

all over the world. Optimal compacting is ensured by the compacting zone integrated into the drawframe and comprising the direct-drive, abrasion-proof perforated drum with stationary suction device, plus the air-conducting element that produces a high level of compacting efficiency. The result of the ComforSpin® process is the patent-protected COM4® yarn, noted for its extremely low hairiness and high strength. Optimal exploitation of the fibre substance means improved running behaviour and measurable cost reductions in the subsequent processing stages.

Card C 60: Innovation to satisfy all requirements
The newly designed high-performance card with new geometry in the carding range is one of the most vital steps towards a successful and efficient spinning mill. With a working width of 1.5 m the production rate is increased by around 50%, whilst maintaining or even improving sliver quality. The C 60 revolutionises the ratio between production output and energy and space requirements. It is available in the conventional form with coiler (CBA), with integrated unlevelled drawframe (SB module), or as levelled version for the OE direct process application (RSB module).

Courtesy: Rieter Textile Systems