| 负压造型时芯砂充填密度分布及其影响因素 |
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| 引用本文： | 向群英,大中逸雄.负压造型时芯砂充填密度分布及其影响因素[J].重庆大学学报(自然科学版),1999,22(5):1-5. |
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| 作者姓名： | 向群英 大中逸雄 |
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| 作者单位： | [1]重庆大学机械工程学院 [2]大阪大学大学院材料开发工学科 |
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| 摘 要： | 通过直接观察圆筒内芯砂的充填过程，测定空气压和粉体压的变化以及砂芯的充填密度分布，考察了芯砂的充填机理，指出砂芯的密度分布一定程度上可用砂粒接触时产生的粉体压理论说明。阐述了影响圆筒内砂芯密度分布的主要因素有高速运动砂粒急速停止时的冲击、流过多孔质砂层的气流阻抗以及壁面前断摩擦。
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| 关 键 词： | 负压造型 砂粒充填 密度分布 粉体压 |
| 修稿时间： | 1999-03-02 |
Density Distribution of Sand Packing in Vacuum Suction Molding Process and its Influential Factors |
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| XIANG Qun yin,Ohnaka Itsuo.Density Distribution of Sand Packing in Vacuum Suction Molding Process and its Influential Factors[J].Journal of Chongqing University(Natural Science Edition),1999,22(5):1-5. |
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| Authors: | XIANG Qun yin Ohnaka Itsuo |
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| Abstract: | By means are measured of the direct observation of the packing behavior of sand in the vacuum suction molding process.The air and powder pressure,density distribution of sand core.The packing mechanisms are studied based on these experimental results.It found that the density distribution of sand core is elucidated by powder pressure theory,and the density distribution is decided by air flowing,sand chocking and shearing. |
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| Keywords: | vacuum suction molding sand packing process density distribution powder pressure |
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