Doctor Blade

The choice of the doctor blade material is essential in view of the doctoring performance. The main reasons for variations in the wear profile of the doctor blade are the following: Variation in the wear profile of the doctor blade is a clear indication of the need to recondition the blade. The doctor blade must be dimensioned correctly according to the roll width.

The optimal wear profile of the blade is a flawless curve.

A wedge-shaped wear profile is due to a wrong alignment of the doctor blade with the roll.

A wave-shaped wear profile may be caused by:
- uneven lubrication,
- pressure/loading variation in the loading hoses,
- impurities in the blade holder,
- variation in the roughness of the roll surface,
- wrong choice of the blade material

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