What is the function of spinning ring? Define its essential parts clearly

The function of spinning ring is to serve as a track upon which the travelers may revolve. In this way, it assists in twisting the yarn and, in addition, helps in guiding the yarn on to the bobbin in the proper pattern to give the desired “wind”.

 A spinning ring is a narrow, vertical, cylindrical, steel band with a horizontal flange which projects at right angles from both sides of the top edge.

 The cylindrical band or vertical part of the ring, is called the “web”. It is quite thin so that the ends of the traveler may be close together, still clear the web and revolve freely.

 The horizontal part at the top of the ring is called the “flange”. This is broad enough to keep the traveler from lifting away from the web. The traveler must be related to fit the flange of the ring on which it runs.

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Which functions influence the amount of twist to use? How?

The amount of twist to use in any given yarn depends on several items:

1. the count to be spun

2. the use for which the yarn is intended

3. the staple of the cotton used

For coarse count, the twist per inch is low. As the count increases, the twist necessary increases.
The uses for which yarns are intended vary greatly and require quite different yarn characteristics.

These characteristics are very largely controlled by the amount of twist used. When soft and supply yarn is desired, these characteristics are obtained by the use of a relatively low twist. A low twist is used where a lustra yarn is desired.

For fabrics like   , where uneven or hard surface is desired, the yarn used has an exceptionally high or hard twist.

 For short stable cottons, it is necessary to use considerable twist to bind the fibres sufficiently to get a satisfactory commercial yarn. As the staple is longer, low twist is necessary to obtain the necessary strength.

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Objective of reversing mechanism in Spinning

When one complete layer has been wound on the bobbin, it is necessary to reverse the direction of the rail for the next layer. 

This is done automatically through the control of the “builder”. The more common mechanical means used for this purpose is a grasp of three bevel gears in the lay gearing train. 

Two large bevel gears are mounted on the same shaft in such a manner that with a short travel movement either of the two may be driven by the third, a small bevel gear. 

As one large bevel gear is driven from the left sideof the small bevel gear, one will cause the rail to descend.

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