Introduction:
The picking mechanism in a shuttle loom is responsible for the insertion of the weft yarn across the width of the fabric. This mechanism involves the movement of the picker, a part that carries the weft yarn across the warp yarn. In this lab manual, we will study the picking mechanism, the movement of the picker in relation to the crank shaft rotation, and calculate the average velocity of the shuttle.
Equipment Required:
- Shuttle Loom
- Picker
- Warp and Weft Yarn
- Measuring Tape
- Stopwatch
Procedure:
- First, we need to understand the components of the picking mechanism. The picking mechanism consists of a picker, which carries the weft yarn, and a crank shaft, which controls the movement of the picker.
- Load the loom with the warp and weft yarn, making sure that the warp is under tension and that the shuttle is properly threaded.
- Observe the motion of the picker in relation to the rotation of the crank shaft. The crank shaft controls the motion of the picker.
- Time the rotation of the crank shaft using a stopwatch. This will help us calculate the average velocity of the shuttle.
- Measure the distance traveled by the shuttle during one pick. This can be done by measuring the distance between the starting point and ending point of the shuttle.
- Calculate the average velocity of the shuttle by dividing the distance traveled by the shuttle by the time it took to complete one pick.
- Analyze the motion of the picker and observe any signs of misalignment or irregular motion.
- Make any necessary adjustments to the picking mechanism to ensure that the motion of the picker is smooth and consistent.
- Run a test weave to check the quality of the fabric. Make any necessary adjustments to the picking mechanism and tension of the yarns.
- Once the test weave is successful, continue weaving the desired pattern.
Conclusion:
In this lab manual, we studied the picking mechanism of a shuttle loom and learned about the movement of the picker in relation to the crank shaft rotation. We also learned how to calculate the average velocity of the shuttle. By observing the motion of the picker and making any necessary adjustments to the picking mechanism, we can ensure that the motion of the picker is smooth and consistent, resulting in high-quality woven fabric. By following these steps, we can produce high-quality woven fabric using a shuttle loom.