Texturing nozzle spinning system
Faster production of multifilament threads thanks to simulation-based nozzle optimization
For the SML spinning system for the production of spun multifilament yarn, LCM has optimized the texturing nozzle as a critical component for increasing production speed. CFD simulations were used to analyze the existing nozzle geometry and a new Laval nozzle design was developed that enables an improved suction effect above the sound barrier. Prototype tests confirm a stable increase in production speed of 20% – limited only by other system components.
Initial situation and requirements
- Product of the system: spun multifilament thread
- Goal: Increase production speed
- Component: Texturing nozzle with suction effect using compressed air to tension the thread
- Problem: Air pressure is increased, but no increase in suction effect => production speed cannot be increased
Technology & results
- CFD simulation of the existing nozzle geometry
- Result: no exceeding of the sound limit possible => suction effect limited
- Redesign of the nozzle geometry (Laval nozzle) for optimum suction effect above the sound barrier
- Prototype tests show a stable increase in production speed of 20% (limited by other system components)
Dipl.-Ing., Dr. Markus Schörgenhumer, BSc
Business Area Manager Mechanics & Control
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