文章基本信息

标题：Study on the Mechanism of the Packing Process and Sink Mark in External Gas-Assisted Injection Molding
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作者：Shaofei Jiang ; Jinlong Tao ; Jiquan Li 等
期刊名称：Advances in Mechanical Engineering
印刷版ISSN：1687-8140
电子版ISSN：1687-8140
出版年度：2014
卷号：2014
DOI：10.1155/2014/853142
出版社：Sage Publications Ltd.
摘要：External gas-assisted injection molding (EGAIM) technology can be applied to effectively reduce the sink marks generated from the shrinkage of plastic parts. In this paper, the interaction mechanism of gas and melting during the EGAIM stage was discussed. The causes of the sink marks on plastic parts as well as the influence of gas-melting interaction on the sink marks were analyzed. A corresponding physical model was established. Using plastic plate parts with stiffeners, for example, the EGAIM process was one-parameter simulated using Fluent software. The sink marks on the stiffeners, the interface morphology between the condensate layer and the gas, and other parameters were obtained. The effectiveness of the model, as well as the simulation process, was confirmed by experiment.