Sizing Faults | Causes of Faults of Sizing

Causes of Faults of Sizing:

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

Overslashed Warps: Causes:

• Due to insufficient splitting of starch at size preparation
• Weak squeezing
• Too deep immersion of the warp into the size box

Sticky Warps: Causes:

• High sizing speed
• Low drying temperature

Over Dried Warps: Causes:

• Low sizing speed
• Long stoppage of machine during sizing
• Very high temperature in the drying section

Gum Spots and Smears: Causes:

• Splashes of size get on the squeezed warp
• Bad stirring of starch at preparation
• Improper coating of felts on the squeezing rollers

Non Uniform Size Regains: Causes:

• Irregular heating of the size in the box
• Dilution of the size with live steam
• Non uniform pressure of squeezing rollers

Crossed and Lost Ends: Causes:

• Lease rods are set too far apart
• Broken ends are improperly pieced up
• Bad warping

Improper Build of Beam: Causes:

• Incorrect spreading of yarn ends in the reed dents

Incorrect Warp Length: Causes:

• Disarrangement of the measuring and marking mechanism
• Improper adjustment of measuring and marking mechanism

Dirt Stains in Warp: Causes:

• The size boxes and machine metal parts are dirty
• The size is cooked in non-galvanized iron kettles.

Shinnery: Causes:

• Due to the friction between the yarn and drying cylinder

Sandy Warp: Causes:

• Due to not crushed or grind the size material

Hard Sizing: Causes:

• Excessive application of size material

Size Dropping: Causes:

• Due to not optimum viscosity of the size solution

Uneven Sizing: Causes:

• Due to over and under sizing 

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