Rieter

The economic potential of rotor spinning

Index

The economic advantages of rotor spinning very soon became evident and have increased in the course of its development with the result that its breakeven point has moved further in the direction of finer yarn counts. The following aspects are decisive in this respect:

  • Rotor spinning was the first process that was capable of producing a cross-wound package ready for processing or sale in a single process stage from a drawframe sliver. Roving frames and winders could be dispensed with; there was thus a significant incentive from the very outset to utilize this process, despite the higher cost of a rotor spinning position compared with a ring spinning position.
  • In terms of manufacturing costs per kg of rotor-spun yarn, direct labor costs occupied a position behind capital and energy costs.
  • Rotor spinning operates with very high efficiency, significantly above that of a ring spinning line. Machine efficiency of up to 99% is achieved in mill operations. Stopping the machine to remove packages, as on ring spinning machines, does not occur in rotor spinning.
  • In many cases advantages in downstream processing in weaving and knitting mills result from longer, faultless running lengths on the cross-wound packages, i.e. fewer malfunctions and stoppages in the downstream process.
  • Last but not least, rotor spinning is more environmentally friendly in terms of dust and noise emissions compared with ring spinning, despite its considerably higher output.