在铁路机客车车辆生产中,铝合金铸件大多用于制作各种管道、罩壳,铜合金铸件大多用于制作各种阀体、轴套、高级卧车内部的装饰用铸件等。对这些钢铝铸件,不仅要求有足够的机械性能,而且要求铸件具有良好的气密性,能够承受较高压力(≥1MPa)的耐水压试验。对装饰用铸件还要求有精良的表面质量。在常规手工砂型铸造基础上,不过多地增加工艺装备和工序流程, In the production of railway passenger cars and vehicles, aluminum alloy castings are mostly used to make various pipes, casings and copper alloy castings, which are mostly used for making decorative castings for various valve bodies, bushings and senior sleeping cars. These steel and aluminum castings, not only requires adequate mechanical properties, but also requires castings with good air tightness, can withstand higher pressure (≥ 1MPa) pressure resistance test. The decorative castings also require a good surface quality. In the conventional manual sand casting based on, but more than increase process equipment and process flow,