一年多来,我厂在兄弟单位的大力协助下,经过反复实践,克服了开裂、缩松、脆性、变形、化学成份不稳等困难,把熔模精铸工艺应用到阀门生产上。至今已有高中压闸板、填料压盖、Dg10Pg250电站截止阀上盖等29种规格的精铸产品成批和小批投产。图1为试制产品之一种。生产实践证明,把熔模铸造应用到阀门上是切实可行的,而且省工省料,效果比较显著(见表1)。 Over the past year, with the great help of our brothers, our factory overcame the difficulties of cracking, shrinkage, brittleness, deformation and chemical composition instability after repeated practice and applied the investment casting process to valve production. Up to now, 29 kinds of casting products such as high pressure gate, packing gland, Dg10Pg250 stop valve cover have been put into mass production and small batch production. Figure 1 is a prototype product. Production practice has proved that the application of investment casting to the valve is feasible, and save labor and material, the effect is more significant (see Table 1).