To minimize squealing run the laminator with the least amount of supply roll
tension that will do the job of removing wrinkles from the web of film. Make
sure you are not using a higher temperature than needed and clean the heat
shoes periodically (see section 6-3). If the noise gets really objectionable
use a different type or different brand of film.
PROBLEM:
The laminated material seems to have a pitted surface or
irregular surface that does not match the texture of the paper being coated.
SOLUTION:
This is usually caused by adhesive build-up or dirt on the
rubber rollers but may be caused by any matter stuck to the rollers such as a
piece of paper. Inspect the rubber rollers and if they need cleaning refer to
section 6-4.
Cuts or other damage to the rubber rollers, especially the laminating rollers,
can also cause irregularities in the surface of the film. The pull rollers are
identical to the laminating rollers and could be substituted if still in good
condition.
PROBLEM:
The film shrinks as it passed over the heat shoe (known as
“necking in the laminating trade).
SOLUTION
: Reduce the heat and/or the supply roll tension. The film is not
shrinking as much as it is being stretched by excess heat and tension
causing the web to get narrower as it is pulled over the shoes.
PROBLEM
: No power is getting to the laminator.
SOLUTION
: Make sure there is power at the electrical outlet being used and
make sure both ends of the power cord are firmly engaged. There are fuses
inside the laminator but dead outlets and loose power cord connections are
the most common causes of this problem.
PROBLEM:
Wavy or rippled sections in the laminate, especially toward the
center of the web.
SOLUTION:
These “heat wrinkles” are caused by excess temperature
and/or speed for the film being used. Slow down the motor and/or use a
lower appropriate temperature for that particular film.
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