Molds & Tooling
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PPS Crystallinity and Performance
Problem Phenomenon
Product strength or heat resistance not up to standard.
Cause Analysis
Crystallinity directly determines PPS mechanical and heat resistance properties; mold temperature and cooling history control crystallinity.; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①Increase mold temperature to promote crystallization; ②ensure setting time; ③detect crystallinity; ④adjust the process according to performance requirements.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PPS performance is realized through crystallinity; the process should be managed with crystallization as the goal.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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