Limitations of Ring Spinning

Limitations of Ring Spinning The method of ring spinning i.e.the use of ring/traveller arrangement creates following limitations: ❖ Incapability to further increase production speeds.❖ Formation of smaller packages ❖ Thick and thin places due to the use of roller drafting technique.Due to the above stated limitations, modern spinning systems were developed for spinning short staple spun yarn e.g.______ spinning, airjet spinning, etc.

Rotor spinning is ____ to ____ times faster and produces yarn at one third of the cost as compared to ring spinning.

The biggest limitation faced by rotor spinning is its inability to produce very ____ yarns.

Rotor or Open-End spinning was commercially introduced in ______.

Rotor Spinning – The Opening Roller is covered with ____ or saw tooth wire.

The rotor spinning process is the first fully automated spinning process. Less energy is required to produce a yarn on rotor spinning system as compared to the ring spinning system. During the fabric formation at knitting or weaving less fibres are abraded off the rotor yarn as compared to the ring spun yarn. The dyeability of the rotor spun yarn is better than the ring spun yarns. These are the advantages of ___________ Spinning System.

The Rotor rotates between ____ – ____ rpm.

Rotor spinning cannot produce finer yarns otherwise easily possible to produce with ring spinning. The presence of wrapping fibres in the rotor spun yarn gives it a harsher and hairier look. The rotor spun yarns have high pilling property as compared to ring spun yarn. The strength of the rotor spun yarn is less than that of the ring spun yarn (about 70% of the ring spun yarn). These are the disadvantages of ___________ Spinning System.

The air jet spinning technique was introduced in early 1980s as an excellent alternate to the ring spinning. This technique uses specially designed air nozzles to impart twist in the yarn. The Airjet spun yarns can be produced at speed up to 20 times faster than ring spinning. This technique produces extremely uniform yarns as compared to ring or rotor spinning. Airjet spinning can also produce much finer yarns as compared to rotor spinning (up to 60 Nc). These are the advantages of ___________ Spinning System.

The air jet spinning process like the rotor spinning and unlike the ring spinning is fully automated system. Due to low levels of twist, the dye-ability of air jet yarns is much better as compared to ring spun yarn. During high speed fabric formation i.e.knitting and weaving the fibre shedding off the surface of the yarn is low as compared to the ring spun yarn. The process of roving and winding/clearing is not required and large fault free packages can be directly produced which is not possible at ring spinning due to limited ring/traveller arrangement. These are the advantages of ___________ Spinning System.

Air jet spinning is only used for synthetic & blended fibres. Cotton yarns can only be spun using in combed form under ideal conditions. Air jet spinning process can produce yarn counts of range 15 to 60 Nc. Yarn counts both finer and coarser than this range is not possible to produce. The lack of twist makes the air jet spun yarn 25 to 30% weaker than the ring spun yarn. These are the disadvantages of ___________ Spinning System.