Molds & Tooling
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LDPE Hot Runner
Problem Phenomenon
LDPE hot runner mold gate stringing.
Cause Analysis
Hot runner temperature is too high and melt viscosity is low, causing gate stringing; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; This mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting.
Solution
Calibrate hot runner temperature; cool the gate area; timed cleaning; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability; Change only one variable at a time and record parameter changes to facilitate locating effective measures.
Key Takeaway
LDPE hot runner stringing is controlled by temperature; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; Incorporate this case into the defect archive as a troubleshooting reference for similar future problems.
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