Processing Machinery
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POM door lock parts
Problem Phenomenon
The POM latch of the door lock breaks at low temperature
Cause Analysis
Low winter temperature reduces POM toughness, and the latch breaks brittlely under impact load; 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 data and should be confirmed first during troubleshooting
Solution
Select toughened grades or metallization for the latch; verify by -40°C low-temperature impact test; 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 to facilitate locating effective measures
Key Takeaway
The low-temperature performance of door lock safety parts must be verified; 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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