Knotting operation is carried out when there is no requirement for drawing-in and when the pattern is to be continued at the same loom. This continuity is maintained in the conventional or usual method though a sequence of operations for which the loom remains in idle condition. In other words, the downtime gets increased hampering the productivity.
Such operations include brushing of the warp sheet, combing and fixing both the ends face to face in sheet form in a fixed stand. The knotting unit or tying unit inserts knots and joins both the warp yarn from the yarn sheets at a speed of 500 to 600 knots per minute depending on the count and density of threads.
In an effort to reduce knotting operation time, the author has developed a new concept whereby certain operations are eliminated during knotting to save time and improve utilization.
The new proposed concept reduces the knotting operation time drastically while it increases the efficiency of the loom shed (by at least 0.25 to 1.35 %). Though more floor space will be required to implement this concept, the merits are much higher and hence worth implementing. The benefits and success rate expected are more in the case of coarse counts and less denser fabrics. However, it is worth taking trials and modifications for finer and highly denser varieties also, he added.
About the Author:
Piyush Chandarana, an engineering graduate and post graduate in business and material management, using his experience and knowledge gained during his long stint with the textile industry has developed a new concept whereby the productivity can be increased while working on a loom. He is currently working as General Manager-Supply Chain Management with reputed company M/s.Parixit Industries Ltd located Ahmedabad.
Views presented in this article are from the practical experiences of the author.