Molds & Tooling
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LCP Flash
Problem Phenomenon
Flash at parting line and inserts.
Cause Analysis
LCP melt viscosity is extremely low and easily penetrates tiny mold gaps; insufficient parting line precision or inadequate clamping force causes flash.; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based solely on experience
Solution
①High-precision parting line fit; ②check clamping force; ③reduce injection pressure; ④repair mold worn parts.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Key Takeaway
LCP flash is more common than PPS; the low-viscosity characteristic requires mold fit precision to reach the highest level.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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