Injection Molding
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LDPE Injection Molded Container
Problem Phenomenon
LDPE containers deform after stacking
Cause Analysis
LDPE has low rigidity and creeps and deforms under long-term stacking; when troubleshooting on site, 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 data and should be confirmed first during troubleshooting
Solution
Reinforcing ribs in container structure; limit the number of stacking layers; select high melt index and high rigidity grades; 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, so as to locate the effective measure
Key Takeaway
LDPE containers are designed structurally according to stacking; after confirming effectiveness, solidify 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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