Second, the various parts of the gating system of the process parameters and the structure of the choice of cooling Design and layout, Top design of the system based, including the choice of mold and so on, have done the relevant research.
其次对浇注系统各个部分的工艺参数及结构的选择，冷却机构的设计与布局，顶出系统的设计依据，还包括模架的选择等等，都做了相关的研究。
Further more, an improved scheme was proposed according to the characteristics of fluid flow in Lost Foam Process. The simulation and pouring test results show that the shrinkage defect at the top of the sheathing board casting could be eliminated by using top gating system.
根据干砂消失模铸造充型过程特点，提出了改进方案，数值模拟结果及浇注实验结果表明，采用顶注式浇冒口系统可以消除铸件顶部的集中缩孔缺陷，证明了模拟软件的正确性。
Introduced with emphasis its design method and the process, analyzed and elaborated top plate's material, the member, modelled the size common difference and the precision choice, the injection machine choice and the examination, the formation components work size computation, slanting roof bar's design, gating system's design, as well as cooling system's design, drawing of patterns ejecting mechanism design, pould frame and standard letter choice.
重点介绍了其设计方法和过程，分析和阐述了后盖的材料，结构要素，塑件的尺寸公差和精度的选择，注射机的选择和校核，成型零件的工作尺寸的计算，斜顶杆的设计，浇注系统的设计，以及冷却系统的设计，脱模推出机构的设计，模架及标准件的选择。
It is impossible to eliminate completely blow hole, blow-shrinkage hole and the other common defects of cylinder head by adopting the traditional foundry method such as bottom or side gating, cold top riser, increasing number of mould vents and core vents.
采用底注或分型面侧注，顶置冷冒口、砂型、砂芯多开气眼等传统工艺方法不可能彻底消除缩孔、缩松、气孔和气缩孔等常见缺陷，是缸盖生产长期废品率高的主要原因。
Top gating system is suitable for metal parts with simple structure and low height while multi-step gating system is suitable for large and complicated parts in gravity casting for rapid manufacturing of metal parts in practice.
分析了面向金属零件快速铸造的重力铸造工艺并以实例说明，顶注式浇注系统适用于结构简单且高度不大的快速零件，而阶梯式浇注系统适用于中大型和复杂程度较高的铸件。
A Core-making Process Cured by Acetal Bottom Pouring Top Kiss Riser Gating System Casting Technology
乙缩醛工艺制芯的研究
Mold filling results of traditional top and new bottom gating system for conventional grey iron blade investment casting were compared.
以普通灰铸铁精密铸造叶片为例，把传统的顶注式浇注系统和新的底注式浇注系统的充型结果进行比较。
Design of Bottom Shower Gating System Using Proportional Solidification Technology at Top Beam of Hydraulic Machine
运用均衡凝固理论设计液压机上横梁底雨淋式浇注系统
Based on the analysis on the structure of the steering wheel made of magnesium alloy, and the design principle of the gating system, top casting, ring casting and aside casting forms are designed by mean of UG.
在对镁合金汽车方向盘压铸工艺分析的基础上，根据浇注系统的设计原则，采用UG软件设计了顶注浇铸系统、环形浇铸系统和侧注浇铸系统三种浇注系统。
In order to prevent casting defects, the combined feeding technology is designed using the proportional solidification theory, in which the top pouring, dispersed ingate intake, combined feeding of gating system and riser are adopted.
为了防止铸件产生铸造缺陷，运用均衡凝固理论，采用顶注、内浇道分散引入、浇注系统和冒口联合补缩工艺。
It was found in the production practice with using kiss gating-feeder, that some defects including top surface depression and shrinkage at kissing area etc.
在使用压边浇冒口的生产实践中，由于化学成分、浇注温度、压边宽度、长度和冒口体积等选取不当，易造成铸件顶面凹陷、冒口根部缩孔、缩松等缺陷。