Processing Machinery
3 조회수
PPO Brittleness and Notch Sensitivity
문제 현상
[Problem Phenomenon] PPO products crack at notches, breaking from sharp corners in drop tests
원인 분석
PPO's rigid molecular chains are sensitive to notches, and sharp corners form stress concentration; when internal stress is superimposed, the notch fails first; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
해결 방법
Structural design with rounded transitions to eliminate sharp corners; annealing to reduce residual stress; avoid interference stress concentration in assembly; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
PPO is notch-sensitive; rounding plus annealing is double insurance against cracking; after confirming effectiveness, solidify 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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