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熔模精铸阀体时,合理地选择浇注系统,是保证阀体不发生渗漏,经得住强力、密封试压的重要因素之一。几年来通过浇注系统的合理改进和其它工艺措施相配合,现在我厂精铸阀体因渗漏而报废的铸件远低于15%。生产试验证明按下列要求设计阀体浇注系统,效果较好:(1)横(直)浇口直接补缩热节,这样既能保证铸件的顺序凝固,又能使横浇口充分发挥冒口的补缩作用。
Investment Casting valve body, a reasonable choice of casting system is to ensure that the valve does not leak, withstand strong, one of the important factors of seal pressure test. Over the past few years through the reasonable improvement of the casting system and other technical measures to cooperate with, and now my factory castings due to leakage valve castings well below 15%. Production test proved that the following requirements for the design of valve casting system, the effect is better: (1) horizontal (straight) gate directly hot section, so as to ensure the order of the solidification of castings, but also to make full play runner Replenishment effect.