10 December 2012
Sizing Faults | Causes of Faults of Sizing
Causes of Faults of Sizing:
Underslashed Warps:
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Underslashed Warps:
Causes:
- Due to insufficient size concentration
- Improper size feed to the size box
- Variable size level
- Dilution of size
- Strong squeezing of warp
Causes:
- Due to insufficient splitting of starch at size preparation
- Weak squeezing
- Too deep immersion of the warp into the size box
Causes:
- High sizing speed
- Low drying temperature
Causes:
- Low sizing speed
- Long stoppage of machine during sizing
- Very high temperature in the drying section
Causes:
- Splashes of size get on the squeezed warp
- Bad stirring of starch at preparation
- Improper coating of felts on the squeezing rollers
Causes:
- Irregular heating of the size in the box
- Dilution of the size with live steam
- Non uniform pressure of squeezing rollers
Causes:
- Lease rods are set too far apart
- Broken ends are improperly pieced up
- Bad warping
Causes:
- Incorrect spreading of yarn ends in the reed dents
Causes:
- Disarrangement of the measuring and marking mechanism
- Improper adjustment of measuring and marking mechanism
Causes:
- The size boxes and machine metal parts are dirty
- The size is cooked in non-galvanized iron kettles.
Causes:
- Due to the friction between the yarn and drying cylinder
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- Due to not crushed or grind the size material
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- Excessive application of size material
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- Due to not optimum viscosity of the size solution
Causes:
- Due to over and under sizing
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