Blow Molding
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LDPE Lab-scale Trial Comparison
Problem Phenomenon
Lab-scale blown film and mass production film have different performance.
Cause Analysis
Lab-scale equipment has different shear and cooling conditions; During on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience; This mechanism has been repeatedly verified by industry literature and should be confirmed first during troubleshooting.
Solution
Convert lab-scale results by empirical coefficients; verify key formulations on the large machine; After adjustment, continuously sample 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.
Key Takeaway
From lab-scale trial to mass production, conversion must be verified; After confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; Incorporate this case into the defect archive as a troubleshooting reference for similar future problems.
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