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Chapter
Process Monitoring
Rev. 1.00.05
Subject to technical changes
15.13Process Monitoring
Recommendation
The learning phase should start, when the machine is running, i.e. after production start of the injection molding
machine. Please note this, when process monitoring mode is selected. Is the learning phase started at a different
point of time, the learned operating points can be adapted by greater tolerance definitions.
Description
Unfortunately leakages in hot runner and hence resulting overmolding could not
always be avoided. They could be caused by wear, incorrect operation, construction
or production faults or by incorrect installation, leading at last to production
breakdown and expensive repair.
The function leakage detection in the hot runner controllers can identify an upcoming
leakage at an early stage, quickly and reliably by intelligent analysis of the process
parameters.
It is possible that there will be false alarms and leaks can not be detected. This
usually depends on structural conditions in the hot runner, as well as on a faulty
operation.
How it works
The status of the zones in the hot runner is supervised by process monitoring with the
help of characteristics, determined during the learning phase (operating point,
tolerance band).
Is the function process monitoring running in case of an error, i.e. the tolerance limit is
exceeded, an alarm is output on display. This alarm can be output on an output and
be used for further analysis e.g. as „Stop Machine“.
What good is it
The process monitoring is an important module for operating reliability. With it, the
state of the hot runner is monitored for leaks. If properly applied, unnecessary
downtime, due to cleaning of the hot runner of over injected plastic, is prevented.
Setting by
[SP07]Process monitoring mode (page 193)
[P025]Proc.monitor. tolerance (page 191)
[P026]Proc.monitor. operating point (page 191)
Text in zone display see chapter
