FAULTS IN DENIM PRODUCTION

FALUTS IN MACHINE:

• • Stop motion does not work on creel and on warping drum as a result broken ends are not traceable for knotting.
• • Chain breakages
• • If frictional drum should not be kept in a polished state, then thermal damages occur due to abrasion.
• • Brake could be inefficient.
• • Sprockets are jammed.
• • If comb do not move properly then there is a chance of cutting of comb due to friction with yarn.

FALUTS IN RAW MATERIAL:

• • Neps
• • Long thick places (in case of non slub yarn)
• • Short thick places (in case of non slub yarn)
• • Thin places
• • Weak places
• • Count variation
• • Hairiness

FALUTS IN PRODUCT:

• • Misalignment of yarn sheet if the yarn sheet is not properly adjusted
• • Uneven package density
• • Too soft package winding
• • Package could not be in uniform density

FALUTS IN MACHINE:

• • leakage of steam in drying cylinders
• • wear and tear of rollers if bearing is jammed
• • Improper working of load cell on squeezing roller. Which causes entanglement of warp sheet as pressure is not properly distributed.
• • Faults in dosing system can cause serious problem of shade variation.
• • If the accumulator do not work properly than the machine is stopped.
• • If speed of the machine is kept greater than the yarn` s bearable strength

FALUTS IN RAW MATERIAL:

The main causes of the dye ability variations in yarn are:

• • Immature fibres
• • Dead fibres
• • Vegetable matter or other foreign matter
• • Wrong twist
• • Bad splice
• • Neps
• • Count variations

SIZING FAULTS:

• • pressure rolls do not work properly
• • squeezing rollers do not work properly

WEAVING FAULTS:

• • dropper will not fall
• • sensors do not work properly
• • Problem in electrical panel
• • Problem in electronic card
• • wear and tear of temple
• • if dust comes in nozzles
• • improper working of solenoid valves