Trouble Shooting - D&K Group EXP 62 Plus Owner's Manual

Trouble Shooting

TROUBLE SHOOTING
COMMON EXAMPLES OF POOR LAMINATING . . . and their causes.
A. FILM NOT BONDING TO SUBJECT OR TO ITSELF AT SEALED EDGES
Causes:
1. The heat (on either or both rollers) is set too low.
2. Film tension is too tight.
3. Bottom roll of film is threaded incorrectly.
4. The pressure setting is not correct.
B. WRINKLES OR IRREGULAR WAVES RUNNING ACROSS THE LAMINATED WEB
(PERPENDICULAR TO THE EDGE)
Causes:
1. The heat set is too high.
2. Not enough tension on the supply mandrels. (Large, irregular waves).
3. Too much tension on the supply mandrels. (Small, fine wrinkles - "orange
peel" effect).
4. The rubber laminating rollers are not clean.
5. The pressure adjustment for the laminating and pull rollers is out of
adjustment.
C. STRETCH LINES RUNNING WITH WEB (PARALLEL TO THE EDGE)
Causes:
1. Too much tension on the supply mandrels.
2. The heat is set too high on either or both heated rollers.
3. The heating rollers are not clean.
D. BLISTERS ON SURFACE OF SUBJECT OR ALONG EDGE OF SUBJECT
Causes:
1. The heat is set too high on either or both heated rollers.
2. Excessive moisture in the paper being laminated. (If inks are not dry,
this may also cause blisters). For high moisture content substrates,
use D&K's low temperature films with a bonding temperature of
185 - 190F
3. The rubber laminating rollers are not clean, or are damaged.
Trouble Shooting (Continued)
E. CURLING OF THE FINISHED LAMINATION
Causes:
1. Unbalanced tension on the supply rolls. Too much tension on the top
supply roll will cause the web to curl up. Too much tension on the bottom
roll will cause a downward curl in the web.
2. Bottom roll of film has been threaded incorrectly.
3. Heat is unbalanced in the top or bottom heated rollers. If the subject
curls up, there is too much heat in the top roller. If it curls down, there
is too much heat on the bottom roller.
F. WRINKLING AROUND EDGE OF LAMINATED ITEM
Causes:
1. Item to be laminated is too thick or
not enough adhesive in type of film being used.
Possible Solutions:
a. Loosen tension
b. Use thicker film (Higher adhesive content)
c. Flush cut item
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