Magnum Venus Plastech ThermoJect V6SC - Manual (Page 8)

Patriot SSB Auto Instructions Issue 05 30/06//08 Page 8 of 17
A resin sample at temperature may be taken during SLOW recirculation mode. Place or
hold a container under the test valve outlet and operate the test toggle switch to open and
close as needed. CAUTION Never leave the test switch unattended in the open position
Injection
To inject resin first confirm that the recirculation flow is correct and no cavitation of the pump
at speed is noted. If cavitation takes place the pump will be heard to “jump” on the down
stroke characterised by uneven flow and short metering delivery compared to the output on
the UP pump stroke. This condition MUST be eliminated before any injection commences.
Usual causes of pump cavitation are-
a/ Resin viscosity too high for pump speed setting
b/ Insufficient temperature of resin leading to higher resin viscosity
c/ Pump speed setting above the maximum recommended for single component resins
( pump speed should not exceed 7 litres /min)
Ensure resin connection to the mould is secure and full vacuum security is achieved.
Ensure hose to mould from ThermoJect outlet hose is at working temperature (Circa 80C)
Press counter reset button to zero top register and set the pre determined count (PDC)
register to a desired value. If the PDC is not to be used to automatically stop the injection set
the pre determined count to highest number i.e. 99999
Set an initial pump speed of approximately 3 bar and press green injection button.
Remember at any point during injection the injection valve may be closed by pressing STOP
Red pushbutton.
Restart is achieved by pressing green injection button .
Speed of injection may be adjusted as required either up or down regulation of the pump
speed regulator as indicated on the pump speed (pressure) gauge.
IMPORTANT NOTE . Should the pump not respond to increased speed regulation then the
mould injection pressure (MPG) must be increased . The MPG will always override the pump
speed control be limiting it, should the down stream line pressure achieve the MPG pressure
setting.
5.0 Shut down
5.1 Operate the pump to the down stroke limit by using of the recirculation control. This
ensures that the resin pump piston shaft remains as recommended unexposed to air during
shutdown and thus lengthens the life of the shaft seal.