Question

The winding tension at the ring frame will be highest during winding at

• A. Empty portion of cop bottom
• B. Empty portion of cop tip
• C. Full diameter portion of cop tip
• D. Full diameter portion of cop bottom

Hint:

Winding tension is highest at the smallest winding diameter, which occurs at the tip of an empty cop in ring spinning. Think about the traveler having to move faster around a smaller circumference.

Answer 1

The Correct Option is B

Step 1: Understanding Ring Frame Winding: In ring spinning, yarn is wound onto a bobbin (cop) that rotates within a ring. A traveler moves around the ring, guiding the yarn onto the bobbin. The winding tension is the force exerted on the yarn during this process.
Step 2: Factors Affecting Winding Tension: Winding tension is influenced by: Balloon Size: The "balloon" is the shape formed by the yarn as it travels from the front rollers to the traveler. A larger balloon generates more air drag and higher tension. Winding Diameter: The diameter of the cop at the point where the yarn is being wound. A smaller diameter requires the traveler to move faster, increasing tension. Traveler Speed: The speed of traveler.
Step 3: Analyzing the Options: Empty portion of cop bottom: At the bottom of an empty cop, the winding diameter is largest. This leads to lower tension. Empty portion of cop tip: At the tip of an empty cop, the winding diameter is smallest. This forces the traveler to move at its highest speed, generating the highest winding tension. Full diameter portion of cop tip: When the cop is full, the winding diameter is smaller at the tip but not the smallest possible. Full diameter portion of cop bottom: When the cop is full, the winding diameter is larger, but the tension is still lower than the empty portion of the cop tip.