采用可溶性型芯组合式(或整体型芯式)的熔模精密铸造法,在多方面弥补了传统的叶轮加工(采用锻材铣制后铆接或焊接、砂型铸造等方法)上的缺点。这种方法是将叶轮内腔整部用尿素型芯成型,尿素型芯则由中芯及叶片两大部份组合而成。型芯安装在压型里,经压蜡制成整体叶轮熔模,熔模放入水中使型芯溶解,就这样得到了图1中封闭式叶轮之熔模。 The use of soluble core combination (or integral core) investment casting process, in many ways to make up for the traditional impeller machining (using forging milling after riveting or welding, sand casting, etc.) on the shortcomings. This method is the whole cavity of the impeller with urea core molding, urea core by the core and leaves two major components from the combination. Core installed in the pressure-type, the pressure made of the whole impeller mold wax melt, melt into the water to dissolve the core, it got the enclosed impeller in Figure 1, the melt.