An Analysis on Increasing the Loom Speed
In this project, an analysis has been carried out on the speed increasing process of Cone over pick loom of 36 reed space, The parts like picking system, Shedding mechanisms, Brake, beat up system etc are given importance in terms of design changes to give a smooth picking, checking and effective braking and also smooth running of crank at higher speeds. The loom characteristics with respect to the above mentioned parts are analyzed and to suit the existing loom parts, new designs have been evolved with the help of PV ATIRA loom part manufactures. The parts received from them are analyzed for their effectiveness, in comparison with the existing parts. The picking mechanism, shedding systems and the brake are mounted on the loom after taking out the respective existing parts. The loom is run without any difficulty at the existing speed. The higher speed has not been tried due to non fixation of the new checking device, central supporting bracket and the bearing for the crank, because of shortage of time. The analyzed facts reveal the advantages indication in the picking force, braking force etc. The picking force is expected to reduce by 14 .Since spring swell is provided in modified loom, the peak retardation value is reduced by 24.3 . sley eccentricity ratio is increased by 7.1 as the connecting arm length is reduced. A sound level is another important factor. With existing parts the sound level measured at picking bowl and shuttle box are 102dB and 109dB, respectively. But in modified loom they are 97dB and 105dB. So, a reduction of noise level by 9dB is achieved by the modification which is an encouraging factor to go in for higher rate of pick insertion. At picking bowl noise level is reduced by 5 and at shuttle box, it is reduced by 3.9 .
Loom Speed, Cam, Picking Mechanism, Shedding