Processing Machinery
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PMMA Barrel Temperature Zoning
Fenómeno do problema
PMMA plasticization is uneven, and products carry unmelted particles
Análise das causas
The barrel temperature gradient is unreasonable, and the compression zone temperature is insufficient; During on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based on experience alone.; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solução
Set the barrel at rear zone 180℃, middle zone 210℃, front zone 230℃; back pressure 0.3-0.7MPa; After adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability.
Conclusão principal
A reasonable temperature gradient plus low back pressure is the PMMA plasticization benchmark; 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 future problems.
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