Study on the Mechanism of the Packing Process and Sink Mark in External Gas-Assisted Injection Molding | Zendy

Jiang Shaofei | Zendy; Tao Jinlong | Zendy; Li Jiquan | Zendy

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Study on the Mechanism of the Packing Process and Sink Mark in External Gas-Assisted Injection Molding

Author(s) -

Jiang Shaofei,

Tao Jinlong,

Li Jiquan

Publication year - 2014

Publication title -

advances in mechanical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 40

ISSN - 1687-8132

DOI - 10.1155/2014/853142

Subject(s) - sink (geography) , materials science , molding (decorative) , fluent , shrinkage , heat sink , mechanical engineering , composite material , mechanics , computer simulation , computer science , engineering , simulation , physics , cartography , geography

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.

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