Injection Molding
4 조회수
PPO Flash and Clamping
문제 현상
[Problem Phenomenon] Flash at the parting line of PPO products; short shot reappears after pressure reduction
원인 분석
PPO has high injection pressure requirements (100-140MPa), and flash occurs when clamping force is insufficient or the parting line is worn; the process window between high and low pressure is narrow; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
해결 방법
Calculate the clamping force margin against the projected area; repair the parting line fit; use a staged injection curve to balance filling and flash; after adjustment, take continuous samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
PPO's high pressure requirement tests the clamping; when flash and short shot coexist, check the equipment first; 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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