Magnum Venus Plastech INNOVATOR MEGAJECT 5000 (8001) - Manual (Page 21)

MAGNUM VENUS PLASTECH Innovator Megaject Manual 21
Catalyst over-pressure protection
The machine features catalyst over-pressure protection. In addition to the
industry standard inclusion of a pressure relief valve in the catalyst circuit, the
control circuit will detect the over-pressure condition and stop the pump from
running. In injection or recirculation modes, this is equivalent to pressing the stop
button.
For example, if during an injection the catalyst system is over-pressurized, the
injection will stop, the mixing head will return to the recirculate position and the
TAS signal will exhaust.
A visual indicator (see section 4) is provided on the side of the control box, which
will change from black to red in the event of a catalyst over-pressure condition.
To reset the over-pressure control circuit, the catalyst pressure must be relieved
and the reason for the condition must be remedied before the machine can be
operated in injection or recirculation modes.
Recirculation mode
Prior to and during operation in recirculation mode, use the pump pressure
regulator and gauge to suitably adjust the air pressure supply to the pump and
control the pump speed.
Press the recirculate button to start the machine, the pump will run and resin and
catalyst will be pumped around the system and returned to source.
Recirculation mode can not be entered when the machine is injecting.
To stop the machine, press the stop button.
NOTE: The MPG, PPVS and catalyst over-pressure controls are active
during recirculation.
Injection mode
Before an injection is started, ensure all external connections to the mould etc.
are correctly made. Also ensure that resin and catalyst lines are correctly primed
and that the required levels of materials are available. Ensure the level of fluid in
the flush tank is sufficient to clean the machine after the injection.
NOTE: When the system is initially primed with resin and catalyst, ensure
the machine is run in inject mode and resin is collected in a suitable
container from the mixing head and that air is purged etc. Once this has
been done, ensure the resin is correctly catalyzed by performing cup tests
prior to using the machine to inject a mould.