Training Course for Supervisors and QC personnel In Textiles

• Irregularity
  • Importance of Irregularity
  • Types of Irregularity
    • Weight per unit length
    • Diameter
    • Twist
    • Hairiness
    • Colour
    • Trash and seed coat content
    • Strength
  • Measures of Irregularity
    • Range
    • U%
    • CV%
    • Fraction Defective
  • Relation between U% and CV%
  • Uster Evenness Tester
    • Principle of Operation
    • Precautions in Testing
    • Various models
  • Variance Length Curve
    • Utility
    • Methods of Measurement
  • Spectrogram
    • With Random distribution
    • With Drafting wave
    • With periodic irregularity
    • Tracing of faults in processes with spectrogram
  • Irregularity added in perfect fibre end drafting
  • Causes of Irregularity
    • Random fibre arrangement
    • Drafting Wave
    • Mechanical faults
  • Control of Irregularity
    • Roller Setting
    • Apron Spacing
    • Break Draft
    • Top Roller Pressure
    • Cot Hardness
    • Cot diameter and Width
    • Nose bar design
  • Improvements in drafting
  • Mechanical defects
    • Eccentricity in Front roller
    • Torsional Vibration of back roller
    • Defective cradle retention spring
    • Defective Top arm weighting
    • Lateral shift of apron
    • Bursted cots
    • Lateral shift of cot
    • Roving guide choke up
    • Vibrating spindle
  • Imperfections
    • Classification
    • Effect on yarn appearance
    • Control of Imperfections
  • Faults
    • Classification as per Uster
    • Influence of raw material
    • Influence of process parameters
    • Contribution of Cleaning and Maintenance practices
    • Control of Faults
    • Clearing of Faults
  • Autolevelling
    • Type – Open Loop and Closed Loop
    • Measuring systems for sliver thickness
    • Control Systems
    • Checking of effectiveness
  • Drafting Force
    • Influence of raw material
    • Process Factors
  • Online Measurement of Irregularity and Faults
  • Norms for U%, Imperfections and Faults

Ring Frame Productivity

• Importance of Ring Frame Productivity
• Ring Frame Utilisation
• Mode of Estimation
  1. From Doff Weight
  2. From Hank Meter
• Efficiency Losses
  2. Contraction
  3. Idle Spindle
  4. Ends Down
  5. Doffing
  6. Unaccountable Causes
  7. Maintenance
  8. Count Change
  9. Traveller Change
• Causes of Idle Spindles
  1. Spindle Tape Breakages
  2. Bottom Apron breakage
  3. Oily cots near gear end
• Ends Down and End breakage rate
• Roller Lapping
• Side Allocation
• Norms for Spindle Speed and TM
• Measures to Reduce End Breakage Rate
  1. Classification of End breakages
  2. Traveller
  3. Ring
  4. Spindle
  5. Flange Number
  6. Lift
  7. Angle of Wind
  8. Wharve Diameter
  9. Spinning Geometry
  10. Lappet
  11. ANBC Ring
  12. Different types of Drives
  13. Drafting Parameters
  14. Ring Rail speed
  15. Top Arm Pressure
  16. Spindle and Lappet centring
  17. Vibrations of Frame
  18. Pneumafil
  19. Humidification
  20. Preparatory processes
• Ring Data
• Modern Ring Frames
• Maintenance and Cleaning

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