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近年来国内外对熔模铸造型壳质量的控制进行了大量试验研究工作。以涂料控制为例,英国于1974年、1977年相继制定了各种粘结剂和涂料的质量控制标准。在型壳高温性能检测方面,逐步从常温发展到高温,英国还对型壳高温性能制定了检测方法和标准。美国对涂料和型壳性能订有ASTM检测标准。日本订有JACT检测标准。随着铸件质量要求愈来愈高,熔模铸造已从少余量发展到无余量。为此,1977年美国开始组织力量修订熔模铸件质量标准,内容包括压型设计、制模、蜡模组合、涂料制壳、陶瓷型芯、蜡料
In recent years, a great deal of experimental research has been done on the control of the quality of investment casting shell at home and abroad. To paint control, for example, the United Kingdom in 1974 and 1977 have developed a variety of adhesives and coatings quality control standards. In the shell of high-temperature performance testing, gradually developed from room temperature to high temperature, the United Kingdom also developed high-temperature performance test methods and standards. The United States has ASTM test standards for paint and shell properties. Japan has JACT testing standards. With the casting quality requirements higher and higher, investment casting has been developed from less than the amount of margin. To this end, the United States in 1977 began to organize efforts to amend the quality standards for investment castings, including the pressure design, mold, wax mold combination, paint shell, ceramic core, wax