Magnum Venus Plastech Megaject RTM Pro Revison 7_0 - Manual (Page 23)

Megaject RTM Pro Manual – Revision 7.00 – 13
th
APRIL 2006
To begin the injection, press the START button. The sounder beacon will operate for
a period, to warn the operator that the machine is about to start. The catalyst pump
will then move to the position on the ratio arms specified by the current catalyst
percentage. At this point the head valves change over to the inject position, if enabled
any connected sprues are opened, and then the machine will begin to inject.
If head pressure clipping is enabled (see section 4.5), unsmooth operation of the
pumps may indicate that the pump power should be reduced. If head clipping is
disabled, care should be taken not to over pressurise the supply line by increasing the
pump power value excessively.
The injection parameters can be modified during the injection and the machine can be
paused or restarted, by pressing the STOP and START buttons respectively.
When the injection is paused, a FLUSH button appears at the bottom right of the
screen. To finish the injection the user must press the FLUSH button (see section 3.8)
to close any connected autosprues, return the head valves to the recirculate position
and to initiate the flush sequence.
3.8. Manual Flush
Under manual operation, the machine can be flushed by pressing the FLUSH button
on the manual injection setup screen (see section 3.5), or by pressing the FLUSH
button on either the manual injection mould pressure control or head pressure control
screens.
The machine has been designed to encourage the user to flush machine correctly after
an injection, and therefore the user has to initiate a flush after an injection to navigate
back to the main menu screen.
To flush the machine during maintenance or in order to perform additional flushes
after an injection, the FLUSH button has been placed on the manual injection setup
screen to prompt the user to configure what autosprues are connected to the system.
This is information is required by the machine to configure the flush sequencer.
When a flush has been initiated, the screen shown in Figure 3.4 will be displayed and
the sounder beacon will operate. This screen gives the user a countdown to
commencement of the flush sequence, and during this time the user may press the
ABORT button to stop the flush and return to the main menu screen. The ABORT
button can be useful in certain circumstances. For example, if an automatic injection
is performed and the operator wishes to introduce more resin into the mould at the end
of the injection, the user may abort the flush and then perform a further manual
injection before flushing the machine.
NOTE: If the user aborts the flush, this will cancel the Resin Gel Alarm (RGA).
Extreme care must be taken not to let the catalysed resin gel in the system.