Basic principles of combing process

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Basic principles of the combing process:


Combing machines operate according to a set of rules or principles, and have remained the same since the invention of the machine. The combing machine does not work continuously but works intermittently. The main reason for this is the short length of cotton fiber. If the combing machine was working continuously, it could be seen that almost all the fiber lengths with the small fibers have gone with the cylinder needle. This would have thwarted the very purpose of combing. All combing processes are completed as follows.

1. A lap of cotton fibers where the fibers are more or less parallel to each other, is passed over the feed plate or cushion plate through the feed roller of the combing machine. The front of this cushion plate has a steep nipper plate. As soon as the lap crosses a predetermined distance, the cotton fibers are attached to the cushion plate and the feeding stops.

2. The lower layer of cotton fibers outside the nipper plate and cushion plate is screwed to the cylinder with the help of a needle according to the comb. The cylinder moves from the main driving shaft due to which the rotation of the cylinder removes small fibers, naps, dirt, etc. from the lower part of the front part of the bundle of fibers in its needles. These are cleaned with a brush located on the back of the cylinder and deposited on the back of the machine so that each time the cylinder needle can be combed in a clean condition.

3. When these partially combed fibers are pulled forward by the detaching roller a top comb (containing only one row of needles) descends on the bunch of fibers. The pull of the detaching roller causes the fiber to move forward and the top comb then removes the small fibers, naps, dirt, etc. located on the top of the bunch of fibers.

4. When the bunch of fibers is completely detached from the lap as a result of the pull of the detaching roller, the top comb returns to its previous position at the end of its work. At the same time, the feed roller moves slightly forward and delivers the lap so that the cylinder needle can comb this forward.

5. Basic principles of the combing process. The top comb then stops working again but at this stage the detaching roller retreats a little before catching the newly combed bundle of fibers, causing the new bundle to fall on the previously combed bundle. thus maintaining the integrity of the sliver in the combing process. As the overlapping occurs, the top comb enters the bunch of fibers. In this case, the upper detaching roller moves slightly forward, leaving the top comb at the back of the bunch of fibers. The combed fiber coming out of the detaching roller enters the trumpet through the web delivery roller and turns into a sliver from where it protrudes over the doubling plate. At the end of doubling and drafting is deposited in the can. This is how the combing process is completed.

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