一种脱模剂在固体火箭发动机燃烧室壳体绝热材料成型中的应用

Application of a Kind of Release Agent in Forming of Insulation Material of Solid Rocket Motor Combustion Chamber

分析了不同脱模剂在固体火箭发动机燃烧室壳体绝热材料成型中的脱模效果,结果表明:8421A脱模剂的质量分数为15%时,表面张力值为22.3mN/m,脱模次数最大,效果最佳。按照工艺方法处理后,用于长径比为18的绝热材料成型中可循环使用9次,且制备的产品合格率达100%,性能满足设计需求。此种脱模剂应用于其它大长径比产品中,脱模效果也尤为显著。

The demolding effect of different demolding agents in the molding of the thermal insulation material within the shell of solid rocket motor combustion chamber was analyzed. The results show that when the mass fraction of 8421 A demolding agent is 15%, the surface tension value is 22.3 mN/m, the number of demolding times reaches the maximum and the demolding effect shows the best. After the treatment according to this process, the demolding process of the molding of the thermal insulation material with a length-diameter ratio of 18 can be performed 9 times repeatly, and the qualified rate of the product is 100%, which meets the design requirements. This demolding agent has been applied to other products with large aspect ratio, and the demolding effect is particularly remarkable.