
Section 20 - Troubleshooting
WARNING
Ensure that you have fully read “Section 3 - Safety” before troubleshooting
any issues with the Hot Runner system.
WARNING - HOT SURFACES
Extreme heat. Avoid contact with heated surfaces. To avoid serious burns
wear safety clothing consisting of a protective heat resistant coat and heat-
resistant gloves. Use adequate ventilation for fumes. Failure to do so can
result in a serious injury.
WARNING - LOCKOUT / TAGOUT
Make sure the machine has been locked out and tagged out in accordance
to the machines documented procedures. Failure to do so may lead to
serious injury or death.
This troubleshooting information assumes that the Hot Runner has been
operational.
Basic rules for troubleshooting are:
•
Define the problem; what is seen is only a symptom of the underlying
problem.
• Develop a method to isolate the problem.
• Test one item at a time to verify results.
•
Monitor the final solution to verify that the problem has been solved.
Repeat occurrences of the same symptom may indicate other problems.
• Document the solution so that a repeat occurrence can be solved quickly.
• Consult other resources to augment the troubleshooting information in
this manual. One of the best resources may be your resin supplier.
20.1 Moisture Related Issues
Many common molding issues can be directly attributed to moisture
contamination of the production resin. Generally, manufacturing resin
is supplied from the manufacturer in ready to process pellets that are in
sealed, airtight containers. Follow manufacturers storage instructions,
keeping containers sealed until ready to use. Prior to using pellets, follow the
drying instructions, as provided by the resin supplier and molding machine
manufacturer, if applicable.
20.1.1 Resin Moisture Contamination
Moisture can be introduced into the resin in many ways:
• During transportation
• Environmental exposure (aging)
• Malfunctioning heater / dryer
• Extreme humidity in atmosphere
• Inadequate or malfunctioning facility HVAC
20-1
TROUBLESHOOTING
Hot Runner User Manual
© 2020 Mold-Masters (2007) Limited. All Rights Reserved.
Содержание Hot Runner
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