Flexa CWT GALAXY, Use And Maintenance Manual

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7.10 Quick roller heating procedure
In the cold seasons or when processing low-quality materials, it is possible to heat the upper roller in order to eliminate or at
least limit problems linked to “silvering,” an effect strictly related to the quality of the adhesives used in the protective film and
to the roughness of the protective liner.
Silvering leads to slightly grey streaks on laminated prints, especially on dark colours.
Heating the protective film, and as a result also the adhesive, significantly reduces or entirely eliminates this occurrence.
The problem cannot be resolved by increasing the pressure between the rubber rollers, as this creates the formation of creases
on the print support.
During the winter months, roller temperature could be too low and “soft” heating (see par. 7.2.2) may not be enough to bring
the roller up to temperature.
Before activating quick heating of the rollers, make sure that there is no material being processing between the rollers and that
the protective liner recovery clutch is not excessive, to prevent that material on the unwinding shaft be rewound.
Perform the following operations to start processing after putting the machine into service:
The approximate times for reaching the selected working temperatures are as follows:
About 20 minutes for 30°C.
About 28 minutes for 40 °C.
About 40 minutes for 50 °C.
Keep the upper roller and lower roller in contact using
the adjustment hand-wheel.
1.
Set roller speed between 3 and 5 via the
potentiometer (A).
2.
Press button (B) to activate upper roller heating. 3.
Repeatedly press button (C) to select the
temperature.
4.
Press and hold buttons (C) and (D) simultaneously. 5.
Button (B) LED will begin flashing; release buttons (C)
and (D).
6.
Press button (E) to activate roller rotation. 7.
Once the selected temperature has been reached,
button (B) LED will stop flashing, becoming lit steadily.
8.
To end quick heating, press button (B).
During operation, the rubber rollers must be in rotation and in contact with one another. A failure to comply with this
rule could cause the heated rubber rollers to become deformed.
Quick roller heating must only be carried out once per work cycle. Two or more consecutive times could seriously
damage the rubber roller.
GALAXY
USE AND MAINTENANCE MANUAL
EN
MANUAL CODE: 756100330_EN
REVISION: 0
DATE: 07/03/2019
FLEXA S.r.l. - Partial or whole reproduction prohibited without authorisation
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