Solution:
Reduce the heat and/or the supply roll tension. The film is not shrinking so
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 out lets 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 cause 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.
Problem:
General haziness or cloudiness in the film after lamination.
Solution:
Increase the temperature. That cloudiness is a function of incomplete
adhesion. On a variable speed machine loaded with thicker film, it may be that the film
is being run too fast and is not getting enough time on the heat shoes.
Problem:
Bubbles in the center of the web and/or film not sticking to the center of an
item.
Solution:
This problem can be caused by excessive laminating roll pressure. Putting too
much pressure on the laminating rollers actually decreases pressure in the center of the
web.
The other likely cause of this symptom is worn rollers. For example, if hundreds of
thousands of 18-inch wide sheets are laminated on a 38-inch machine, the center of the
rollers can get worn down more than the ends of the rollers. In this situation, the
laminating rollers should be replaced. The rollers worn in this way are not suitable for
use as pull rollers.
For problems not listed here contact your Ledco Dealer. If the Dealer doesn’t know the
answer, please ask the dealer to contact Ledco and get back to you.
You are also welcome to contact us directly with any problem at 716-367-2392. Because
of the potential volume of support calls, we do encourage the use of the dealer network as
much as possible.
