Magnum Venus Plastech Flex Molding Process MKVI Mix - Manual (Page 31)

MKVI Mix Meter System Operations Manual
Rev. 08/2013 Page | 31
6. If applicable - Connect the resin pick-up pipe to the bottom of the Secondary pump
and tighten fully. Place the wand with filter, and the recirculation return pipe into a
suitable container. Securely anchor wand and return pipe.
Note: it is important to have the end of the return hose into the material for
materials like epoxy to prevent air bubbles from being introduced.
7. If applicable – Connect the Catalyst Pump Inlet to the Catalyst Jug Outlet and fill
the catalyst jug three quarter full with a suitable catalyst / hardener.
8. Recirculate both materials (Resin & Catalyst / Hardener)
– following the procedures
above as noted in “Recirculation” until both materials are thoroughly primed and free
of air bubbles.
9. It is recommended to conduct a Ratio Check and Gel Test before proceeding to the
Injection process.
Shutdown Instructions:
1. At the end of the day/shift switch off the machine air and electrical power. Leave the
resin pump piston shaft parked at the bottom of its stroke. This ensures any smears
of resin on the pump shaft do not dry out causing excess seal wear.
2. For long shutdown periods, if any doubts exist about the stability of the resin system,
it should be re-primed with an unfilled, un-accelerated resin system. Once the
system is full of un-accelerated resin, pump approximately 300cc of resin through
the injection head then flush. Do not leave the Megaject either empty, or with a
cleaning solvent in the resin system. Under normal circumstances, catalyst may be
left in the system for extended periods.
3. If filled resin systems have been used filler may settle at the bottom of the pump and
pipework. Under these circumstances a higher pump pressure may be required to
start the pump recirculating. If filler has formed sediment around the bottom inlet ball
valve of the pump it may momentarily stick. In such circumstances continue to
pump on re
circulation for 3 minutes as this should ‘unstick’ the valve. The resulting
flow will quickly wash away sediment, allowing the pump to operate correctly. If the
problem continues, the bottom resin pump ball valve must be serviced.
4. After a shutdown period, it is expedient to ensure the resin and catalyst systems are
fully primed.