Principally focussed on the combing process, the initial chapters of this book explain the basic functioning of the conventional comber, which is not very different from modern combing. Various associated motions with reference to certain timings along with importance are illustrated in detail. Characteristics that set the modern comber apart are also discussed including speed and control of features such as vibrations and fatigue. The role of modern electronics in mechanism control, including related calculations and solved examples, is described.
Features:
- Exclusive title focussing on various elements of combing in spinning.
- Includes detailed functioning of conventional and modern combers.
- Explains various motions in combing pertaining to different timings.
- Discusses the role of modern electronics in controlling the mechanisms and offering online controls.
- Features solved examples at the end to tackle problems at the shop-floor level.
This book is aimed at senior undergraduate/graduate students, textile process engineers and related manufacturing technologists, quality assurance professionals in textile engineering, staple fibre processing, spinning of staple fibres, textile marketing/design, textile technology, yarn manufacturing, spinning machines and design of yarns.
Chapter 1. Combing Preparation
1.1 Short Fibres
1.2 Problems with short fibres
1.3 Objects of combing
Chapter 2. Preparation for combing
2.1 Earlier History
2.2 Fibre arrangement in card sliver
2.3 Fibre presentation
2.4 Fibre parallelization
2.5 Post-comb draft & Number of doublings
2.6 Comber preparatory machines
2.7 Improvements in Sliver Lap Machine
2.8 Improvements in Ribbon Lap Machine
2.9 Lap Former
2.10 Super Lap Former
2.11 Effect of Lap Preparation System on waste extracted at Comber
2.12 Some Experiments with Pre-Comb Draft & Fibre Presentation
2.13 Staple length & pre-comb draft
2.14 Effect of heavier laps on comber noil
Chapter 3. Comber
3.1 Introduction
3.2 Cycle of operation
3.3 Aspirator
3.4 Detachment
3.5 Web delivery
3.6 Drive to main parts
3.7 Index cycle
3.8 Combing cycle
3.9 Motion to various parts
3.10 Brush shaft & aspirator
3.11 Web condensation and drawing
3.12 Draw box and coiling
3.13 Coiling
Chapter 4. Important Comber Settings
4.1 Bottom Nipper & Steel Detaching Rollers
4.2 Quadrant Setting
4.3 Positioning of Nipper Pivot Stud
4.4 Bottom Nipper & Cylinder Half Lap
4.5 Top Comb
4.6 Other Settings on Comber Affecting Comber Noil
Chapter 5. Cylinder & Top Comb Needling Arrangement
5.1 Cylinder Needling
5.2 Top Comb Needling
5.3 Uni-Comb
Chapter 6. Other Aspects
6.1 Double Combing
6.2 Combing of Blends
6.3 Combing Operation & Quality
6.4 Fractionating Efficiency
6.5 Combing & Cutting Ratio 128
6.6 Fibre Loss in Combing & Control of Comber Noil
Chapter 7. Faults in Comber
7.1 Damage to Half-Lap & Top Comb
7.2 Uneven & Inadequate Nipper Grip/ Feed Roller Grip/ Detaching Roller Grip
7.3 Curling of Fibres in the Web
7.4 Holes in the Web
7.5 Uncombed portion in the Web
7.6 Plucking
7.7 Cutting Across
7.8 Web not coming through Heads
7.9 Lap running slack between Lap Roller & Feed Roller
7.10 Lapping on Detaching Rollers
7.11 Flocking of waste on Cylinder Needles
7.12 Excessive loss of Long Fibres
7.13 Irregular Draw-Box Sliver
7.14 Post-Comb Drawing Frames
Chapter 8. Features of Modern Comber
8.1 Feed
8.2 Nippers
8.3 Cylinder Needling
8.4 Top Comb
8.5 Detaching Rollers
8.6 Web Condensation & Sliver Table
8.7 Draw Box
8.8 Coiler
8.9 Larger Diameter of Cylinder
8.10 Avoiding Inverse Air Flow by Brush
8.11 Nylon Filters for Noil Collection
8.12 Head-Stock
8.13 Combing Parameters & Yarn Quality
8.14 Comber Lap
8.15 Comber Waste
8.16 Waste Level & Comber Settings
8.17 Innovation in Comber (Double-Sided Comber)
Chapter 9. Comber Calculations
9.1 Sliver Lap Machine
9.2 Ribbon Lap Machine
9.3 Super Lap Machine
9.4 Comber
9.5 Whitin Comber
9.6 Solved Examples
9.7 Exercises
9.8 Solved Examples – Comber
9.9 Some Typical Examples on Fractionating Efficiency
9.10 Exercises
Biography
Ashok R. Khare is a graduate, post-graduate and doctorate from a well-known technological institute – Veermata Jijabai Technological Institute, Mumbai (formerly known as Victoria Jubilee Technical Institute). He graduated from this Institute in 1970 and went to serve a well-known textile group of Mafatlal mills. After serving for nearly 5 years in the textile mills, he returned back to his Alma mater in 1975 as a lecturer in textile technology. In the due course, he was promoted to Assistant Professor and Professor.
In the last phase of his service in V.J.T.I., Mumbai, he took over as the Head of the Textile Manufacture’s Department. Almost during the same tenure, he held a position of Deputy Director in the same Institute. He has written several articles on card cleaning efficiency, role of uni-comb, extended research work on influence of doubling parameters on properties of blended doubles yarns.
