In this study,a large injection mold with a sequential valve hot runner was designed for the left-front door panel of a vehicle,and the forming defects such as poor filling and fusion marks in the horn mesh were effectively eliminated by using the formed parts made of a type of powder metallurgy breathable steel.The problem in the inclined inner reverse buckle demold-ing was effectively solved by using an inclined guide groove.The difficulty in filling large mold cavities was effectively ad-dressed by using a sequential valve hot runner control technology.The injection cycle was shortened by about 8％,and the di-mensional accuracy reached the MT3 level(GB/T 14486-2008)by using a fast and balanced temperature control system.
维普
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