Injection Molding
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Nozzle temperature affects the quality of melt entering the mold
Problem Phenomenon
Nozzle temperature affects the quality of melt entering the mold
Cause Analysis
Nozzle temperature too low, cold slug produced and carried into the cavity during injection
Nozzle temperature too high, severe drooling, wasting material
Temperature difference between nozzle and barrel front zone too large
Nozzle heater band failure, unstable temperature
Nozzle orifice diameter and temperature not matched
Solution
Set nozzle temperature 5-10°C lower than the front zone
Avoid too low producing cold slug
Avoid too high causing drooling
Ensure the nozzle heater band works normally
Match nozzle orifice diameter with temperature
Key Takeaway
Nozzle temperature needs to coordinate with the front zone to avoid cold slug and drooling
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