Processing Machinery
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PP EPP Foaming Defects
Fenómeno del problema
【Problem Phenomenon】EPP foamed parts have uneven density and insufficient strength
Análisis de la causa
Improper steam temperature and pressure during EPP bead foaming and molding; poor bead fusion leads to poor strength; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based only on experience
Solución
Steam temperature and pressure according to regulations; mold venting; uniform bead pre-pressing; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Conclusión clave
EPP foaming depends on the steam process, bead fusion determines strength; 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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