Molding Process 7 조회수

Improper multi-stage speed settings produce jetting, weld lines or surface defects

문제 현상

원인 분석

Slow stage too long, filling time too long, surface condensation Fast stage too fast producing jetting or excessive shear Improper speed switchover point selection, unsmooth transition Too many or too few stages set, control complex or not fine enough Unreasonable speed proportion allocation of each stage

해결 방법

Initial slow speed to prevent jetting (5-15% of maximum speed) Middle fast filling (60-80% of maximum speed) Final stage deceleration to prevent flash (20-40% of maximum speed) Reasonably set 3-5 speed stages Adjust each stage proportion according to the cavity structure

핵심 요약

Multi-stage speed needs optimization according to the cavity structure

multi-stage injectionspeed controljettingfilling

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Improper multi-stage speed settings produce jetting, weld lines or surface defects

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