The casting technique with top gating system, outer shaped iron chill, compound casting mold and core assembly molding was used for producing aluminum impeller on a large scale successfully.

详细介绍了采取顶注式浇注系统、成形外冷铁、复合铸型、组芯造型的铸造工艺，成功地生产出批量铝叶轮。

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The basic principle of the proportional solidification theory was introduced, and the influences of casting construction, feeder position and chill on feeding effect was described.

介绍均衡凝固的基本原理，叙述铸件结构、冒口位置和冷铁对补缩的影响。

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Using thin, wide ingate and chill can prevent the shrinkage defect, and improve casting yield by 3%.

采用薄、宽的内浇道和冷铁工艺消除了飞轮铸件的缩孔缺陷，铸造工艺出品率提高3%；

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