Chapter 5
Setting-up Operation, Daily Operation
DM55 DynaDrum PP V6, Manual No.21-18, Rev.2.19 Page 37
Platen Retract Air Pressure (Air Injection)
To remove the platen from the drum, it may be necessary to create a positive pressure in
the drum. This is accomplished by pressing the Air Inject push button while
simultaneously raising the platen. The Air Inject feature is particularly useful when the
platen is removed prior to reloading the Bulk Melter with a new drum of adhesive.
Air pressure is adjusted by the Main Air Prep Assembly air regulator located inside the
pneumatic panel box. Pressure should not exceed 5 psi (0.3 bar).
Air Injection is activated automatically during Ram Up movement!
If Air Injection is not used, the purge valve must be opened during Ram Up in order
to prevent a vacuum condition inside the drum.
Pump Pressure Regulator
When adhesive demand changes, pump speed and delivery may need adjustment. This
is accomplished by changing the pump pressure. Manually turn the handle of the
pressure regulator mounted on the piston pump’s air motor assembly as needed.
Ram Up Regulator
The ram up regulator is piped in-line of the bottom side of the cylinder and it provides a
secondary and reduced pressure for the Ram Up function. The factory pre-set is between
10-12psi (0.7 - 0.8 bar). The ram up regulator prevents the unit from developing excessive
stored energy (force) in the event the platen becomes stuck inside a drum during an Auto
Ram Up cycle.
If a platen becomes stuck in a drum, extreme caution should then be used by operating
the unit in Manual Mode and making necessary and temporary minor adjustments to the
ram up regulator as well as the air injection regulator. Be sure to reset the default values
before the platen seal breaches the top of the drum.
The ram up regulator is adjusted by pulling up on the regulator dial and turning either
clockwise or counter-clockwise. Push the regulator dial down to lock the setting.
Platen Position Sensor
The level detector may be adjusted digitally via the HMI by the continuous platen position
(string-pot) sensor.
To Next Page
Loading...
