Injection Molding
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LDPE '2079851475616104452 Flash
Problem Phenomenon
Parting line flash is obvious.
Cause Analysis
LDPE has low viscosity and very easily seeps into fitting gaps; holding pressure is too high.
Solution
①Reduce holding pressure; ②increase clamping; ③repair fitting surfaces; ④lower melt temperature.
Key Takeaway
For soft material flash, reduce pressure first.
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