Question 39 (Textile Engineering & Fibre Science)
The advantage of flyer leading over bobbin leading speed-frame is
| (A) | Lower roving stretch |
| (B) | Lesser chance of unwinding after breakage |
| (C) | Lower power requirement |
| (D) | Power requirement remains fairly constant during the bobbin build up |
Answer / Solution
[Show Answer]
Option C
Frequently Asked Questions | FAQs
What is the function of the speed frame?
The speed frame is a machine used in the textile industry for the production of cotton or synthetic yarns. It is an intermediate machine that comes after the carding process and before the spinning process in the yarn manufacturing process. The main function of the speed frame is to further align and parallelize the fibers in the carded sliver and further draft and twist them into a finer, more uniform yarn.
The key functions of the speed frame in textile production are:
Drafting: The speed frame increases the length of the carded sliver by drafting or stretching it to reduce its thickness and improve its evenness. This is done by passing the sliver through a series of pairs of rollers that rotate at different speeds, creating tension and elongating the sliver while maintaining its uniformity.
Twisting: The drafted sliver is then twisted by rotating the spindles of the speed frame. The amount of twist is controlled based on the desired yarn characteristics, such as strength, thickness, and twist per inch (TPI).
Bobbin Formation: The twisted yarn is wound onto bobbins, which are cylindrical or conical spools, to form yarn packages that can be used in subsequent processes, such as spinning or plying.
Fiber Parallelization: The speed frame further aligns and parallelizes the fibers in the sliver to improve the quality and strength of the resulting yarn. This helps to reduce variations in yarn thickness and ensures consistent yarn properties.
Control of Yarn Tension: The speed frame also controls the tension applied to the sliver during drafting and twisting to ensure uniformity and consistency in the resulting yarn.
Overall, the speed frame plays a critical role in the yarn manufacturing process, transforming the carded sliver into a finer, more uniform yarn with improved strength, evenness, and twist characteristics, ready for further processing or end-use applications.