Moog IMI220-145D001, Руководство пользователя

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PARISON CONTROLLER
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Moog Italiana srl - Bergamo MAN145-UM-D01A-EN 7
After flushing is complete, stop the pumps and replace the flushing element with a standard high-pressure filter
element. Replace the flushing blocks with the servo-valves. Remember to reconnect the electrical connectors.
CAUTION
The flushing element is a LOW-PRESSURE element designed to be used in conjunction with the flushing
blocks. Failure to replace it with the correct high-pressure filter element after removing the flushing blocks
will result in the filter element collapsing and possibly damaging the machine.
NOTE
On some machines when the flushing blocks are installed in place of the servo-valves, hydraulically
operated devices may not function. The flushing blocks are configured to direct pressure back to tank
allowing the system to be flushed at low pressure. Because of this, no pressure will be created in the
hydraulic system.
1.7 A Word About Hydraulic Pumps.
One of the most common failures seen in parison control valves is a buildup varnish in the valve. This is usually
caused by oil overheating and breaking down. Most standard petroleum based hydraulic fluids begin to reach their
temperature specification somewhere between 130 and 150 degrees Fahrenheit (between 55 and 65 degrees
Celsius). While you may never surpass this temperature while running, it can easily be exceeded when the pumps
are off and the machine heats are on. The stationary oil in the valve absorbs the heat and can quickly surpass the
oil’s breakdown point.
To reduce the possibility of this happening it is suggested that anytime the heats are on, the pumps should continue
to run. The oil moving through the valve will actually act as a coolant and help to prolong servo-valve life.
1.8 Transducers Installation.
The Parison Controller uses DCDT position transducers to feed back programming cylinder position information to
the controller. A separate DCDT is required for each individual head.
If servo-actuators of the type described above are being used, the DCDT is integrated into the actuator package
and has been pre-adjusted at the factory. No further adjustment is required.
If the programmer is used in a position based application there is also a linear position transducer that is needed
to monitor the position of the reciprocating screw or accumulator push-out cylinder.