LA 404 Pattern Control System
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Part 1037527
B
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200
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Nordson Corporation
Manual 66-LA404-MA-01
Modulate Beads
Modulated bead patterns provide a nearly constant bead volume below a
set line speed. When the production line slows down to a user-selected
speed, the control begins dividing the beads into smaller spaced sub-beads
to prevent the bead volume from increasing. At any given line speed, the
total gun-on time to produce the modulated bead remains the same as the
total gun-on time to produce the solid bead at the set line speed, so that the
divided modulated bead contains the same amount of adhesive as the solid
bead. As the line speed decreases, the sub-beads get shorter and their
thickness increases. Specify the interval desired between sub-beads, and
the control will always place a sub-bead at the beginning of the bead length
defined and one as close as possible to the end of the bead length.
The bead-modulation feature is typically used in systems that do not have
run-up control.
178 mm (7.0 in.)
Line Speed
38.1 m/min (125 ft/min)
30.5 m/min (100 ft/min)
22.9 m/min (75 ft/min)
15.2 m/min (50 ft/min)
7.6 m/min (25 ft/min)
3.1 m/min (10 ft/min)
6640038A
Interval = 25 mm (1.0 in.) Speed = 30 m/min (100 ft/min)
Dur 1
Figure 8
Effect on Modulated Bead Pattern as Production Line Drops Below Activating Line Speed of 30 m/min
(100 ft/min)
Содержание LA 404
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