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制壳是熔模铸造的关键一环,我们对国内76个有代表性的单位进行了调查,绝大多数工厂仅控制水玻璃模数M、比重d和涂料粘度。由于控制项目少,实际上涂料质量不稳定。近几年来涂料控制已成为熔模铸造行业最为关心的问题之一。 一、涂料性能要求及其测定方法 为保证铸件质量及制壳操作方便,首先应合理选择粘结剂、耐火粉料等原材料,并根据粘结剂、耐火材料种类、粒度分布等来决定粉料和粘结剂数量的比例关系,即常称的粉液比。
Shell is a key part of investment casting, we conducted a survey of 76 representative units in China, most of the factory only control the water glass modulus M, the proportion of d and paint viscosity. Due to the few control items, the paint quality is actually unstable. In recent years, paint control has become one of the most concerned issues in the investment casting industry. First, the coating performance requirements and determination methods To ensure the quality of castings and shell easy to operate, first of all should be a reasonable choice of binder, refractory powder and other raw materials, and according to the binder, refractory species, particle size distribution to determine the powder And the ratio of the amount of binder, that is often called the ratio of powder to liquid.