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CN3600 Setup & Operation Manual Revision : 6/2020
55
IMPORTANT NOTE: : Condition of the log roll will affect quality of slit rolls.
Read the page headed “Principles of Single Knife Slitting”.
SLITTING PROBLEMS - copper aluminium foils
PROBLEM/EFFECT
CAUSE
REMEDIES
Self wound foil tapes, copper,
aluminium, lead, tear when
being unwound after slitting
•
Knife rolls
edge
over,
causing tape to tear when
unwound
•
Foils must be interlined to
be slit on a Single Knife
Slitter.
SLITTING PROBLEMS - single sided closed cell foam sealant tapes
PROBLEM/EFFECT
CAUSE
REMEDIES
Foam tape with paper interliner
leaves paper on adhesive side
after slitting.
•
Knife edge dull
•
Knife rpm, mandrel rpm
incorrect for product
•
Knife edge must be kept
sharp
Paper Interliner breaks when
slit roll is unwound.
•
Too much lubricant spray
that is absorbed by paper
interliner.
•
Cut back on spray.
Poor
quality
cut
and
appearance.
•
Knife RPM is too low or too
high.
•
Experiment
with
either
lower
or
higher
knife
speeds.
•
Sprays
not
directed
towards edge of knife
•
Centralize spray so it is
directed down both sides of
the knife.
•
Leading edge of material
facing wrong way.
•
Flap or leading edge of
foam must face away from
the operator.
•
Chuck/knife running in
wrong direction.
•
Contact point of tape & knife
should be in same direction.
PROBLEM/EFFECT
CAUSE
REMEDIES
Ragged edge on slit rolls
•
Knife edge breaks down or
becomes dull.
•
Always use High Chrome
knives which retain sharp
edge longer and for soft
open cell foams run chuck
in reverse if necessary.
•
Sprays
not
directed
towards edge of knife
•
Centralize spray so it is
directed down both sides of
the knife.
•
Generally use higher knife
RPM
and
lower
chuck/mandrel RPM for soft
open cell foam.
SLITTING PROBLEMS
– soft “open cell” foam