介绍了一种新型的注塑成型技术——物理微发泡微开模注塑成型技术.该技术采用物理微发泡的单相熔体注射到模腔后迅速将模具微开模,使得内部的熔体继续发泡膨胀,最后冷却定型成产品.相对于普通注塑,物理微发泡微开模注塑技术可以减少产品质量30个百分点以上,同时其物理性能可满足产品的要求.该技术可以减小产品变形和降低产品内应力,在非外观的汽车内外饰产品中广泛应用.%This article introduces a new injection molding technology,viz.,the opening mould foaming after Mucell.Firstly,the single-phase melt is injected into the mould,and then the mould is quickly opened with a small distance.The inner melt resin continues foaming and growing with the opening mould and the final product forms when the growing process stops and the inner material cools down.Compared with normal injection process,this new process introduces weight saving up to 30 percentage points,and meanwhile,physical properties of the products can fullfill the corresponding requirements.In addition,the deformation and internal stress of the products are highly reduced with the technology.This process can be widely used in the production of non-appearance parts for automotive,which helps reduce the weight of car and save energy.
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