Processing Machinery
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PA6 and PP Selection Cost
Problem Phenomenon
To reduce cost, PP replaces PA6 structural parts, and high-temperature deformation occurs after installation on the vehicle
Cause Analysis
PP's continuous use temperature and rigidity are far lower than glass-fiber reinforced PA6; in high-temperature occasions such as the engine compartment, PP softens and creeps, and the low price brings performance downgrade; when troubleshooting on site, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Insist on reinforced PA6 for high-temperature load-bearing parts; PP is suitable for normal-temperature low-load interiors and containers; for cost reduction, prioritize PA6-PP composite structures or partial replacement
Key Takeaway
Material substitution must be evaluated by temperature and load boundaries, and cannot only compare unit prices; after confirming effectiveness, fix the parameters and practices into the work instructions to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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