Mold-Masters Hot Runner, User Manual, Page: 250 / 319

18.9.2 Shutdown - Reverse Melt Link ONLY
CAUTION
Failure to follow this procedure may result in leakage or damage occurring
in the Hot Runner.
CAUTION
IMPORTANT
Thermally sensitive materials should be purged from the Hot Runner
system prior to shutdown using a thermally stable material with a similar
processing temperature.
Maximize decompression stroke prior to shutdown.
This will minimize drool at startup when there is limited gate cooling.
Please see “18.1 Reverse Melt-Link Identification” for more information on
how to identify if your system has a Reverse Melt Link.
1. Reduce Melt-Disk temperatures to 150°C (300°F).
2. Reduce nozzle temperatures to 150°C (300°F).
3.
Turn off all zones.
18.10 Disassembly for Maintenance
18.10.1 For Melt Link
IMPORTANT
Before shutting down the molding machine and mold, use maximum screw
decompression to remove as much molten plastic from the Hot Runner
system as possible.
1. Disassemble mold to expose the Melt-Disk. Plate insertion / removal to be
done with all components in the cold condition.
2. Melt-Disks should be heated to 120 - 138°C (250 - 280ºF) before removal.
The Melt-Disk should be removed as soon as it reaches setpoint.
Two M4 screws can be used as an aid to remove the Melt-Disk.
18.10.2 For Reverse Melt Link
IMPORTANT
Before shutting down the molding machine and mold, use maximum screw
decompression to remove as much molten plastic from the Hot Runner
system as possible.
1. Disassemble mold to expose the Melt-Disk. Plate insertion / removal to be
done with all components in the cold condition.
2. Nozzles should be heated to 120 - 138°C (250 - 280ºF) before removal.
The Melt-Disk should be removed as soon as the nozzles reach setpoint.
Two M4 screws can be used as an aid to remove the Melt-Disk.
18-14
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MELT-DISK SYSTEM
Hot Runner User Manual