Processing Machinery
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POM automotive fuel system
Problem Phenomenon
Fuel system POM parts swell and fail after long-term contact with fuel, and clamps break
Cause Analysis
POM's excellent fuel resistance makes it a standard material for fuel systems; but the long-term action of alcohol-containing fuel and additives needs verification, and the superposition of assembly stress and vibration fatigue can also cause fracture
Solution
①Perform immersion verification of fuel contact parts with the actual fuel formulation; ②control assembly torque to prevent stress cracks; ③perform fatigue verification under vibration conditions; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
Key Takeaway
POM is a mature material selection for fuel systems; formulation verification and stress management are the details that make a mature application solid; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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