Blow Molding
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HDPE '2079851475616104457 Pinhole
Problem Phenomenon
HDPE blow molded barrel wall has pinhole leakage
Cause Analysis
Air entrapment in the parison or raw material impurities form pinholes after blowing; during on-site troubleshooting, verify item by item according to this mechanism to avoid blindly adjusting the machine based solely on experience; this mechanism has been repeatedly verified by industry data and should be confirmed first during troubleshooting
Solution
Filter and check raw materials; investigate parison air entrapment; reject pinhole barrels; 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
2079851475616104457 pinholes are controlled by raw material and parison quality; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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