在确保熔模铸件的表面光洁度、尺寸精度、内部质量、化学成份及机械性能的前提下,若能进一步缩短型壳的焙烧周期,这对节约电能和降低成本具有重大的意义。我们对数量大(每年约250000件)的形状较简单的MX50型摩托车的曲柄臂等铸件的型壳进行了低温短期焙烧浇注的试验,由焙烧几组进行浇注扩大到整炉焙烧浇注,收到初步效果。一、高强度型壳的制备对制造高强度型壳用的粘结剂,耐火材料、涂料、硬化剂的物理化学性能及工艺参数均有较严格的要求。水玻璃粘结剂处理前后的化学成份及工艺参数如表1;对耐火材料的要求如表2;用自动制壳线制壳的工艺参数如表3。二、对高强度型壳进行低温短期焙烧的 In the premise of ensuring surface finish, dimensional accuracy, internal quality, chemical composition and mechanical properties of investment casting, it is of great significance to save energy and reduce costs if the firing cycle of the shell is further shortened. We carried out a low-temperature short-term roasting and pouring test on a large number of castings (about 250,000 pieces per year) of the MX50 motorcycle crank arm and the like. To the initial effect. First, the preparation of high-strength shell For the manufacture of high-strength shell binder, refractory, paint, hardener physical and chemical properties and process parameters have more stringent requirements. Water glass binder before and after treatment of chemical composition and process parameters in Table 1; the requirements of refractory materials in Table 2; shell system with automatic system shell line process parameters in Table 3. Second, the high-strength shell for short-term roasting