Molds & Tooling
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LCP Flash and Overflow
Fenómeno del problema
【Problem Phenomenon】Thin-sheet flash appears at the parting line and ejector pins of LCP products, and the mold clamping surfaces are gradually pressed with dents
Análisis de la causa
LCP melt viscosity is extremely low and very easily seeps into 0.02mm-level tiny gaps to form flash; it worsens when clamping force is insufficient, the parting line is worn, or venting is too deep; flash of low-viscosity materials is a commonly recognized problem in Celanese troubleshooting and industry literature
Solución
Verify the clamping force and repair the fitting accuracy of the parting line; control the vent groove depth to the allowable lower limit for low-viscosity materials; appropriately reduce injection speed and peak pressure to avoid overfilling
Conclusión clave
Low-viscosity LCP is extremely sensitive to mold fitting accuracy; mold repair and clamping take priority over pressure reduction; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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