浇注温度越高、直浇道空心面积率越大，铝液充型速度越快。
The higher the pouring temperature or the larger the sprue hollow area rate is, the faster the filling velocity of molten aluminum is.
一定的直浇道长度及直浇道面积有利于提高铝液的充型速度。
It will be helpful to improving the filling velocity when the sprue length and sprue areas are controlled to some extent.
得出的优化方案为将原始铸造工艺中的双直浇道结构改为较为简单的单直浇道系统；
The optimum process is that, the double-gating system in original process is replaced with a single-gating system.
通过理论分析比较并通过生产实践得出，对于铸件工艺出品率，正方形或正六边形截面的直浇道优于圆形截面的直浇道。
The sprue with square or hexagonal section is superior to the sprue with round section for technological yield of the casting by theoretical analysis and actual verification.
对喷嘴选择，直、横浇道及浇口设计等进行了分析。
Make analyses of selecting nozzle and designing sprue runner and gate and etc.
对喷嘴选择，直、横浇道及浇口设计等进行了分析。
Make analyses of selecting nozzle and designing sprue runner and gate and etc.
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