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5.3 Setting the stretch of the winding off of the foil
Setting the stretch (pull) on the winding foil may be set using the regulation nut
(Figure 9-D). Any unevenness on the foil, especially at the point of contact of the foil with the
lamination roller may be removed by gradual tightening of the spring of the friction brake
(Figure 9-C). By applying more force on the brake, some errors during lamination may also
be resolved – higher resistance of the winding causes better sticking of the foil to the heated
roller, and thus even better heating of the foil. The foil may thus better stick to uneven, or
dark surfaces.
5.4 Setting the correct temperature
The upper heated roller is equipped with precise temperature regulation. For most
applications, we recommend to set the temperature on the roller between 100 and 120°C.
Optimum temperature differs depending on what kind of foil is used. Therefore, the minimum
temperature must be tested on samples. Set the temperature by pressing the "T+" button
(Figure 8-12) (increasing the temperature), or "T-" (Figure 8-13) (reducing the temperature).
Achieving the correct temperature is signaled by the READY LED (Figure 8-3) and the
temperature may be read on both displays (Figure 1-1, Figure 8-9). After the equipment is
turned on, the value of +85°C is displayed as the set temperature. The highest temperature
which may be set on the equipment is limited by the program to amount to 155°C.
During the lamination itself, after several sheets are laminated, the temperature on the
rollers may drop by 5 or 10 degrees. This may be prevented by setting slightly lower initial
speed of lamination on the equipment than usual. After having laminated several sheets of
paper, the speed of the lamination may be gradually increased and the temperature will settle
to amount to the required temperature *. If the working rollers are still getting cooler, please
check whether the heating is turned on (LED (Figure 8-4) in the "HEATING & READY"
button). If this is the case, it is necessary to lower the speed of the motion again, which will
balance the heat losses with the capacity of the heating and the temperature will settle at the
required level.
5.5 Setting the correct lamination speed
Setting the optimum speed of the lamination depends especially on the laminated
material, or its thickness. It is performed by the SPEED regulator (Figure 8-1) and, for most
applications, speeds between 2 and 4 will suffice.
If it is necessary to laminate under temperature higher than 120 °C, the temperature
must be increased during the lamination process at a very low speed.
Set the temperature at 120 °C and wait until the indicator of the real temperature of the
rollers (red display) reaches the value of 115 °C. At that moment, start laminating with speed
of 2- 4 m/min. Simultaneously, set the required temperature using the T+ button to amount to
120-135 °C. As soon as the actual temperature of the roller exceeds the value of 120 °C,
gradually increase the speed of the lamination. The speed may be increased until the roller
maintains the required temperature if the quality of the lamination is sufficient. The above-
mentioned values are listed only as demonstrative examples and may vary according to the
type of foil used. To increase the temperature, it is necessary to follow the instructions very
closely step by step.
G
To achieve good quality of lamination, a principle applies that the speed must be
increased gradually.
Summary of Contents for Foliant 370T
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