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The knowledge for hot runner nozzle leakage

How to analyze hot runner nozzle leakage, we usually judge form the following aspects:

Questions:  The tip of hot runner nozzle loose or break,gate bush break


Reasons: Injection pressure is too large,not tightened during installation


How to handle: clean plastic - tighten loose parts/change new parts/revise mold size-reinstall system (The installation position for tip should clean ,otherwise it occur to blend.)