Molds & Tooling
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PBT product flash
Problem Phenomenon
Parting line flash.
Cause Analysis
Insufficient clamping force or mold wear; when PBT flowability is good, high pressure penetrates into the gap.; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①Check clamping force; ②repair the parting line; ③reduce pressure peak; ④repair worn parts.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Distinguish clamping and wear for flash; progressive flash indicates mold repair.; 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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