Question 31 (Textile Technology & Fibre Science)
Match the spinning technology listed in Group I with the machine component / function listed in Group II.
|Group I||Group II|
|P. Wrap spinning||1. False twisting|
|Q. Rotor spinning||2. Perforated drums|
|R. Air-jet spinning||3. Back doubling|
|S. DREF II friction spinning||4. Hollow spindle|
|(A)||P-3, Q-4, R-2, S-1|
|(B)||P-4, Q-1, R-3, S-2|
|(C)||P-4, Q-3, R-1, S-2|
|(D)||P-3, Q-1, R-2, S-4|
Frequently Asked Questions | FAQs
What are the characteristics of wrap yarn?
A core of parallel yarns,wrapped together by the wrap thread.Wrap thread may be filament and staple fibre yarn.
What is meant by rotor spinning process?
Rotor spinning is a method of yarn spinning used in the textile industry to produce yarn from staple fibers such as cotton, polyester, or viscose. It is a high-speed spinning process that can produce large quantities of yarn quickly and efficiently.
In rotor spinning, the staple fibers are first prepared by cleaning, blending, and carding to ensure a consistent quality and composition. The fibers are then drawn through a series of rollers to further align and lengthen them.
Next, the fibers are fed into a rapidly spinning rotor or open-end spinning machine. The rotor spins at a high speed, typically around 100,000 revolutions per minute (RPM). As the rotor spins, the fibers are drawn into the rotor through the center and expelled through small openings or vents on the sides, where they are wound onto a bobbin or package.
The resulting yarn is typically lightweight and soft, with a moderate amount of strength and elongation. It can be used in a wide range of textile applications, including apparel, home textiles, and industrial fabrics.
Rotor spinning is a continuous process that can produce yarn at high speeds, making it suitable for large-scale production. It is often used in combination with other spinning methods, such as ring spinning, to produce a range of different yarn types with varying properties.
What is the basic principle of air-jet spinning?
The basic principle of air jet spinning is to use high-pressure air to separate and twist fibers into yarn. The air stream acts as a means of conveying the fibers through the spinning system, while also imparting the necessary twist to form the yarn. The process can be carried out at high speeds and can produce a range of yarn types with different properties, such as strength, elongation, and surface texture.
Air jet spinning is a yarn spinning method used in the textile industry to produce yarns from staple fibers such as cotton, polyester, or viscose. The basic principle of air jet spinning involves using high-pressure air to separate and twist fibers into yarn.
The air jet spinning process can be broken down into the following steps:
Fiber preparation: The staple fibers are first prepared by cleaning and blending to ensure a consistent quality and composition.
Carding: The fibers are then carded to align them in a parallel arrangement and to remove any remaining impurities.
Drafting: The carded fibers are drawn out and elongated by a drafting mechanism.
Air jet spinning: The elongated fibers are then fed into a high-pressure air stream, which separates and twists the fibers into yarn. The air pressure causes the fibers to wrap around each other, creating a twisted yarn. The yarn is then wound onto a bobbin or package.
Winding: The yarn is then wound onto larger packages, ready for further processing or use in textile products.
What is DREF II application?
In friction drum spinning, the spinning rotor is in the form of a drum, and it rotates at high speed around a fixed axis. The drum has a rough surface, which creates friction and aligns the fibers as they pass through the drum. The fibers are fed into the drum by a series of feed rollers, which help to control the fiber flow and ensure uniformity.
One of the advantages of friction drum spinning is that it can process a wide range of fibers, including synthetic fibers and blends. It also has a higher production rate than traditional ring spinning and can produce yarn with unique properties, such as improved strength and uniformity.
Friction drum spinning is used in the production of a variety of textile products, including denim, carpets, and technical fabrics.