Processing Machinery
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HIPS Product Stress Whitening
Problembeschreibung
HIPS products whiten at bending or stressed positions.
Ursachenanalyse
The rubber phase in HIPS separates from the matrix interface under stress to form crazes; snap-fits and bending positions are high-incidence areas.; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Lösung
①Optimize the structure to avoid local overstress; ②enlarge fillets; ③select high stress-whitening-resistant grades; ④control assembly force.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Wichtigste Erkenntnis
HIPS stress whitening is related to rubber phase behavior; structural optimization is more effective than process adjustment.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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