Molds & Tooling
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Fiber enrichment at the weld line area
Fenómeno del problema
White fiber aggregation is visible to the naked eye at the weld line of the product, and the strength of this area is far lower than other parts
Análisis de la causa
The two melt fronts carry glass fibers to aggregate at the weld interface when converging; poor venting in the convergence zone prevents the fibers from redistributing uniformly
Solución
Optimize gate position and number to reduce weld lines; increase mold temperature to extend fiber redistribution time; design overflow wells at weld lines to discharge enriched fibers
Conclusión clave
Glass fiber aggregation at the weld line is the structural cause of the sharp drop in mechanical strength in this area
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