Molds & Tooling
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PA66 winter process compensation
Problembeschreibung
After winter workshop temperature drops sharply, PA66 product dimensions are overall smaller and brittleness increases
Ursachenanalyse
Mold heat dissipation speeds up, actual mold temperature below the setting, melt front cools fast, crystallization behavior changes causing shrinkage and toughness changes; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based solely on experience
Lösung
Raise winter mold temperature setting by 5-10℃ and measure actual cavity surface temperature; barrel temperature at upper limit; mold fitted with insulation boards to reduce heat dissipation loss; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Wichtigste Erkenntnis
Seasonal changes require measured mold temperature compensation, not just changing set values; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for subsequent similar problems
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