Molds & Tooling
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PA12 Demolding Difficulty and Ejection Breakage
문제 현상
【Problem phenomenon】PA12 products stuck to the mold during demolding and broke during ejection, with a low yield rate
원인 분석
Insufficient demolding taper, poor surface finish, improper ejector pin position, or too-small diameter are the main causes; PA12 has good toughness, but concentrated ejection force on thin-wall parts can still break them; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
해결 방법
Increase the demolding taper and polish the mold surface; increase the number of ejector pins or enlarge the diameter to equalize ejection force; extend cooling time and appropriately lower barrel and mold temperature; after adjustment, take consecutive samples to verify the effect, and resume mass production only after confirming stability
핵심 요약
For demolding problems, first check taper and polishing; equalize ejection to prevent local breakage; 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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