Injection Molding
6 조회수
LLDPE '2079851475616104452 flash
문제 현상
LLDPE injection molded parts have less flash than LDPE, but flash still occurs when clamping is insufficient
원인 분석
LLDPE viscosity is higher than LDPE, with smaller flash tendency; but under high injection pressure of 800-1500bar, insufficient clamping still produces flash; mold wear enlarges the gap
해결 방법
①Calculate clamping force per high-pressure process; ②ensure parting line fit precision; ③injection pressure only needs to be adequate; after adjustment, continuously sample to verify the effect, and resume mass production only after confirming stability
핵심 요약
LLDPE's higher viscosity reduces flash risk; but clamping force calculation under high-pressure process still cannot be omitted; after confirming effectiveness, fix the parameters and practices into the work instruction to prevent recurrence
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