Processing Machinery
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POM zipper teeth
Problem Phenomenon
POM zipper teeth have insufficient engagement strength and come off the chain
Cause Analysis
The dimensional accuracy of the teeth and the material strength jointly determine the engagement strength, and molding shrinkage affects the tooth profile; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Correct the mold according to the measured shrinkage; select high-strength homopolymer grades; test according to zipper industry standards; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
Zipper teeth are selected and verified according to industry standards; after confirming effectiveness, fix 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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