Fulfill
Retrofit for Mesa Melters
13
Part 1121938_02
2013 Nordson Corporation
Theory of Operation
NOTE: Refer to Appendix A, Retrofit Refill System With Nordson Level Sensor, for updated
information.
Overview
The system adds small quantities of adhesive to the sealed tank at regular
intervals, reducing the possibility of adhesive char, contaminants, thermal
shock and incorrect adhesive temperatures that result in poor bonding.
A capacitance sensor located in the melter detects low adhesive level, and
then sends a signal to the system control. A delay timer prevents the fill
system from frequently cycling on and off.
At the end of the delay the control activates the vacuum via a solenoid valve.
Air pressure flows to a suction lance that is placed in the supplied bulk
adhesive container. Using vacuum, the system conveys adhesive from the
bulk container to the adhesive melter tank.
The controller activates the suction lance for a limited amount of time to
prevent over‐fill conditions. If the maximum fill time is exceeded, the
controller activates a fault that stops the system from filling.
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