Molds & Tooling
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PPO Mold Deposit
Problem Phenomenon
[Problem Phenomenon] After long-term PPO production, mold venting and cavity accumulate deposits, and product appearance gradually deteriorates
Cause Analysis
Additive precipitation and trace degradation products deposit on the mold surface; high mold temperature operation accelerates the migration of precipitates; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Regularly clean mold venting and cavity; analyze deposit composition to adjust material or process; shorten the cleaning cycle to prevent accumulation; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
PPO mold deposit is chronic accumulation, and a regular cleaning system preserves appearance; 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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