Molds & Tooling
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POM conveyor chain plate
Problem Phenomenon
After a million cycles, the pin holes of conveyor chain plates wear and break, and the chain links elongate and skip teeth
Cause Analysis
Chain plates bear the dual action of cyclic load and pin hole wear; POM has excellent fatigue performance, but pin hole stress concentration and abrasive wear are the life bottleneck; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
①Add bushings at the pin holes or locally thicken; ②check the cyclic stress against the fatigue limit; ③select wear-resistant grades for wear conditions and manage regular replacement cycles; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
POM chain plates are the benchmark for fatigue applications; pin hole reinforcement and life cycle management make a million cycles well-founded; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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