Magnum Venus Plastech PATRIOT SSB Commissioning and instruction - Manual (Page 7)

SSB_Auto Instructions Issue 05
Page7
3.17 Turn solvent isolation valve Open 90º (in line with valve flow) and operate (Pull) solvent Air
flush control. Allow machine head and mixer to flush clean and dry out with air flow for about 35
seconds. Return solvent /air flush control to off position. (PUSH IN) Turn Solvent isolation valve
to closed position.
Note for safety AND security reasons always adopt a policy of keeping the red handled solvent
isolation valve in closed position when not flushing the head.
The machine is now fully primed and ready for production operation.
Resin Mix gel time test
If the resin mixed reactivity needs to be first checked before injecting a mould it is wise to make
a test mixture from the machine mix head in order to determine exactly the gel time at the
ambient temperature and the catalyst ration set. Remember to flush to clean the head after
taking the sample mixture dispensed and ensure the flush is safely directed to a suitable waste
container.
General notes on gel time.
A/ It is wise to set and confirm gel times at least 30% longer than mould fill time
B/ Remember that UP resin will gel twice as fast for a 10°C increase in resin temperature.
c/ Be aware that cool resin is significantly more viscous than when at normal room temperature.
In these circumstances allow more time to fill the mould and thus more time for gel time is
needed to ensure mould fill without pre gel condition.
D/ AS a guide Plastech’s experience has shown a general UP low viscosity resin suitable for
injection has given the following general guide
Using 6% strength Cobalt Naphthalate ( 6% CN) as the primary accelerator and AAP catalyst
0.1% CN = 1 hour gel time with 1% AAP catalyst
0.2% CN = 20-30 minutes gel time at 1 % AAP catalyst
0.3% CN = 15-25 minutes gel time at 1% AAP catalyst
A typical 20 minute gel time would be formulated with 0.2% CN with 2 % AAP catalyst ratio
setting.
These figures are given as a guide and must be checked for your chosen UP resin system
4.0
Machine Operation
4.1 RTM or Light RTM operation
4.2 Adjust Catalyst ratio to required setting
4.3 Attach Mould to Mixer output point using 10 mm nylon pipe or via Autosprue® or Turbo
Autosprue brass quick connect. IMPORTANT –Ensure this is locked into position.