Technologyof Denim Production: Part- III (Long Chain Beamer & Sizing Techniques forDenim)
Long Chain Beamer
After the rope dyeing of warp yarn in denim production, thenext operation is the Long Chain Beamer (LCB). When the rope has been dyed anddried in the rope dyeing range, it is taken in large cans in coiler section. Inrope dyeing range, if the machine has a capacity 24 ropes, then there will be24 separate coilers which delivers 24 ropes in separate cans. These cans aretransferred to the Long Chain Beaming area. The basic purpose of long chainbeamer is to open the rope into a sheet form of yarn and wind onto a warperbeam which in turn transferred to the sizing machine.
In Long Chain Beamer, the yarn alignment in the dyed rope ischange from a rope form to a sheet form. In the Long Chain Beamer the rope pullfrom the can by moving them upward to a guiding device. The guiding device ismounted above the can, probably in the ceiling. The upward movement of the ropeallows the ropes to untangle before nearing the beamer head and allow the ropeto shake loose form from the rest of the rope in the can.
Tension Stand
When the ropes come down from the guiding device, it passes throughtensioning Stand rollers. The purpose of the Tension rollers is to establishednecessary warp tension to the rope and help in further separation of the ropesbefore going through a comb. If no tension is applied to the rope, then therope have a tendency to resist opening up into the sheet form. Ultimately eachin the rope will start separating directly at the comb located at the LongChain Beamer. This may leads to rope damage.
The Tension Stand is approximately 4-feet high and consistsof two tension drums, each approximately 14-inches in diameter and 14 inchesface length. These rolls are fitted one over the other.
Before passing through the Tension Stand, the rope passedthrough a simple pretension device, which is located at the base of the TensionStand. The pretension device applied slight resistance to the rope beforewrapped onto the tension rolls which is located on this Tension Stand.
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Theauthor is Manager (TQM) at Shri Lakshmi Cotsyn Limited, UPSIDC Industrial Area,Malwan, Dist. Fatehpur, UP
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