Page 45 - Training 2019

blade holder/chamber is properly aligned this excessive pressure would
not be necessary.

The blade needs to be held parallel to the axis of the roller (skewing) and
parallel to the roller surface. It is also important to note that the T.I.R.
(Total Indicator Runout) of the roller to be metered as mounted in its
bearings, measured in the press is very important. Also, roll balance is
another important issue. Any condition that causes the roll to move in an
elliptical path can cause metering problems.

In addition to parallel and skew, when dealing with a chamber, it is
important to keep both blades aligned. If the skew and parallel alignment
is proper but the two blades do not contact the Anilox surface
simultaneously, the blade that contacts first will become over loaded. This
condition will drastically change the blade Contact Angle with only a small
tilting of the chamber. This is less of a problem if the chambers
containment blade hits first, but needless to say it is an undesirable
condition.

Tilted only 2° could change the contact angle out of the acceptable range.
5° would cause the side of the blade to meter instead of its tip.
Holder/Chamber alignment should be routinely checked.

IMPORTANT POINTS TO REMEMBER:

When ordering your flexo end seals, make sure they are made of a
material that is compatible with the type of ink or coating being
used, the length of the run, and the press speed.

Today there are a number of end seal material options for all types of inks
that can offer very long life. However, these solutions are often more
expensive so you need to match the material specific to your criteria.

A number of new flexo end seals have coatings and multiple
material combinations (two part and three part) are on the
market today.

Most of these are designed to increase end seal life. When combined with
today’s longer lasting blade options they can significantly reduce the need
to shut down the press just to change seals or blades.

It is important to know that not all felts are created equal.

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CHAMBER BLADE END SEALS TRAINING MANUAL
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Updated - 24 June 2019