Molds & Tooling
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PPO Warpage and High Mold Temperature Side Effects
Problem Phenomenon
[Problem Phenomenon] PPO products warp and deform, still unstable after mold temperature adjustment
Cause Analysis
When mold temperature is higher than 150°C, defects such as warpage easily occur; uneven cooling, improper holding pressure and fiber orientation (reinforced grades) are also causes of warpage; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Control mold temperature below 150°C and distribute it evenly; balance holding pressure and cooling; optimize gates for reinforced grades to homogenize orientation; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
For PPO warpage first check whether mold temperature exceeds the limit, then check cooling and holding pressure balance; 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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