Factors governing Optimum Spinning condition, Yarn quality assessment, Causes of end breakage/ end down
Contents
Factors governing optimum spinning conditions
- Spindle speed
- Ring die
- Lift
- Traveler weight
- Relative humidity
Yarn quality assessment
- Yarn count and its variation
- Twist and its variation
- Evenness CV% or U%
- Strength and its variation(csp of yarn)
- Imperfections
Causes of end breakage/End down:
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If spinning tension is greater than yarn strength in the Ring frame, then end breakage is occurred and also due to roller lapping.
A. Technical causes
- An insufficient twist in the yarn
- If traveler fly off
- Subbing thorough
- Stretched roving
- Faulty drafting roller setting
- Faulty traveler selection
- Excessive yarn tension
- Improper atmospheric condition
B. Mechanical Causes
- Faulty drafting system
- Worn out ring and traveler
- Faulty gear and wheels
- Worn out top rollers
- Faulty apron
- Spindle vibration
- Eccentric ring
Optimum spinning conditions
- Spindle speed
- Ring die
- Lift
- Traveler weight
- Relative humidity
Yarn quality assessment
- Yarn count and its variation
- Twist and its variation
- Evenness CV% or U%
- Strength and its variation(csp of yarn)
- Imperfections
Causes of end breakage/End down:
If spinning tension is greater than yarn strength in the Ring frame, then end breakage is occurred and also due to roller lapping.
A. The technical causes
- The insufficient twist in the yarn
- If traveler fly off
- Subbing thorough
- Stretched roving
- Faulty drafting roller setting
- Faulty traveler selection
- Excessive yarn tension
- Improper atmospheric condition
B. Mechanical Causes
- Faulty drafting system
- Worn out ring and traveler
- Faulty gear and wheels
- Worn out top rollers
- Faulty apron
- Spindle vibration
- Eccentric ring