Numerical Simulation and Analysis of the Influence of the Pattern Density on the Filling Behavior in Lost Foam Casting

Chang Qingming1; Chen Changjun1; Xiong Jiulang1; Huang Naiyu2

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Numerical Simulation and Analysis of the Influence of the Pattern Density on the Filling Behavior in Lost Foam Casting
Issue 3, Pages: 212-215(2008)
Published： 2008 ，
DOI：

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[1]常庆明,陈长军,熊九郎,黄乃瑜.模样密度对消失模铸造充型模式影响的模拟计算[J].特种铸造及有色合金,2008(03):212-215+162.

Chang Qingming1, Chen Changjun1, Xiong Jiulang1, et al. Numerical Simulation and Analysis of the Influence of the Pattern Density on the Filling Behavior in Lost Foam Casting. [J]. Special Casting & Nonferrous Alloys (3):212-215(2008)
[1]常庆明,陈长军,熊九郎,黄乃瑜.模样密度对消失模铸造充型模式影响的模拟计算[J].特种铸造及有色合金,2008(03):212-215+162. DOI：

Chang Qingming1, Chen Changjun1, Xiong Jiulang1, et al. Numerical Simulation and Analysis of the Influence of the Pattern Density on the Filling Behavior in Lost Foam Casting. [J]. Special Casting & Nonferrous Alloys (3):212-215(2008) DOI：

摘要

针对消失模铸造和普通砂型铸造中充型模式的差异

通过建立自由表面换热边界条件和压力边界条件

模拟了消失模铸造中熔融金属的充型过程

分析了模样密度对消失模铸造充型模式的影响。分析表明

消失模铸造中金属液从内浇道处呈放射状向前充填

充型较平稳进行

消失模气化反压与重力的相对大小决定了液态金属充型过程中的充填趋势。预测了铸造缺陷的产生过程。

Abstract

The filling process of molten metal in lost foam casting was simulated to analyze the effects of pattern density on filling behavior by establishing boundary of free surface heat-exchange and pressure boundary condition according to the difference of filling behavior in lost foam casting and in green sand casting.The simulated results reveal that the liquid metal is filled radially into the cavity from the ingate with smooth process

and the cascading tendency of molten metal in the mold is controlled by the relative values of the pressure of the vaporized pattern to the gravity.Furthermore

the potential defect in the casting was visualized

which provided a reference to optimize filling process of design to check up to re-design in CAD.