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首页> 外文期刊>International Polymer Processing: The Journal of the Polymer Processing Society >Residual Wall Thickness Study of Variable Cross-section Tube in Water-assisted Injection Molding
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Residual Wall Thickness Study of Variable Cross-section Tube in Water-assisted Injection Molding

机译：水辅助注射成型中可变截面管的残余壁厚研究

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摘要

Residual wall thickness is an important measure of the quality of water-assisted injection molding (WAIM) parts. Based on the traditional injection molding model, Reynolds stress was introduced into the WAIM model for the turbulent characteristics of high pressure water. In addition, residual wall thickness was computed by a computational fluid dynamics (CFD) method, and the results matched well with experimental data. The results show that the hollowed core ratio changes from small to large in the first half of water penetration, while in the latter half it is just the opposite. Difference of the residual wall thickness is larger at the large-diameter position of a part than other position. Residual wall thickness is mainly affected by water injection pressure, delay time, melt temperature, mold temperature and amount of short shot, in which the amount of short shot is the most obvious.
机译：残留壁厚是水辅助注塑（WAIM）零件质量的重要指标。在传统的注射成型模型的基础上，将雷诺应力引入到WAIM模型中，以了解高压水的湍流特性。此外，通过计算流体动力学（CFD）方法计算了残余壁厚，其结果与实验数据非常吻合。结果表明，在水渗透的前半部分，空心核比从小到大变化，而在后半部分则相反。零件的大直径位置处的剩余壁厚差异要比其他位置大。残余壁厚主要受注水压力，延迟时间，熔融温度，模具温度和短射量的影响，其中短射量最明显。

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