Molds & Tooling
4 조회수
POM Weld Line Strength
문제 현상
Insufficient strength at the weld line; gears and snaps fracture and fail along the weld line
원인 분석
When POM melt fronts meet, molecular chain entanglement is insufficient, making the weld line a weak strength band; improper gate position causes the weld line to fall in the stressed area, cracking first under fatigue load
해결 방법
①Increase mold temperature to improve front fusion quality; ②position the gate so the weld line avoids stressed areas; ③if necessary, set an overflow well to discharge the cold material front; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
POM weld line management relies on moving design forward; high mold temperature and gate layout optimization transfer the weak line to non-critical areas; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence
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