Molds & Tooling
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TPU Mold Temperature Management
Problem Phenomenon
TPU products stick to the mold during demolding and surface gloss is poor
Cause Analysis
Too high mold temperature makes soft TPU stick to the mold; too low gives poor surface replication; when troubleshooting on site, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience; this mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting
Solution
Mold temperature controlled at 20-70°C: soft material takes the low limit to prevent sticking, hard material takes the high limit to preserve gloss; uniform mold temperature; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
TPU mold temperature is set according to hardness and surface requirements; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a troubleshooting reference for similar problems in the future
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