Processing Machinery
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GPPS Obvious Weld Lines
Fenómeno del problema
Weld lines of transparent parts are clearly visible and the strength is low.
Análisis de la causa
The fronts of the two melt streams have low temperature and fuse poorly; PS transparency makes weld lines impossible to hide, affecting both appearance and strength.; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solución
①Increase melt and mold temperature; ②optimize gate position to avoid appearance surfaces; ③set overflow wells at the confluence; ④increase confluence speed.; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Weld line management of transparent parts should take both appearance and strength into account; design avoidance takes priority over process remedies.; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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