Unit 2 Theories of carding, transient state of carding machine, analysis of cylinder load and

4 lecture hours

• transfer efficiency
• average number of revolution of fiber on cylinder and fiber mixing in card

Unit 3 Fiber shedding from cylinder, effect of centrifugal force and air drag, role of wire

• geometry on fiber shedding
• carding force between cylinder and flat and factors influencing it, hook formation in carding

Unit 4 Analysis of fiber configuration in draw frame sliver, Hook removal and its significance,

6 lecture hours

• Sliver irregularity
• Fiber movement in drafting field
• Suppression of drafting wave
• Drafting force
• Roller slip
• Roller eccentricity and vibration

Unit 5 Boundary length in forward and backward feed comber, fiber fraction in comber, action of

4 lecture hours

• top comb
• wavelength of piecing wave
• differential combing
• effect of batt weight in combing
• probabilistic model for calculation of comber noil and effective noil removal

Unit 6 Analysis of forces on yarn and traveler, Spinning tension in ring and rotor spinning,

6 lecture hours

• spinning geometry
• Twist flow in ring and rotor spinning
• Balloon theory in spinning
• mechanism of end breaks in ring and rotor spinning
• probability model of end breaks
• roller lapping and its prevention
• aprons and cots

Unit 7 Yarn formation in rotor spinning, fiber flux, fiber overlap and gap of fiber layer in rotor

• change in fiber orientation in rotor spinning
• generation of wrapper fiber
• property relation of rotor 6 Subject Code: 3722502 w.e.f