Processing Machinery
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HDPE film screen clogging and output decay
Fenómeno del problema
The output gradually decreases over time, and after increasing the speed the frost line rises and the film bubble becomes unstable.
Análisis de la causa
The screen gradually clogs, causing the die head pressure to rise and the output to decrease; the operator's speed increase to compensate instead pushes up the melt temperature and frost line, triggering secondary problems.; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solución
①Establish a screen replacement cycle record; ②monitor the die head melt pressure for early warning; ③replace the screen in time when clogged instead of increasing the speed; ④improve the cleanliness of the raw material.; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
Conclusión clave
Screen management relies on system rather than experience; melt pressure monitoring plus regular screen replacement is the standard practice.; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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