Molds & Tooling
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GPPS Product Flash
Problem Phenomenon
Flash appears at the parting line.
Cause Analysis
Insufficient clamping force or mold wear; GPPS has good fluidity and easily penetrates into tiny gaps under high pressure.; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solution
①Check clamping force; ②overhaul the parting line; ③reduce injection pressure peak; ④repair wear.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Flash treatment should distinguish between two types of causes: insufficient clamping and mold wear.; after confirming effectiveness, fix 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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