探讨用硅溶胶与硅酸乙酯制造复合型壳的工艺，选择出层间干燥时间等参数，为生产使用提供了科学依据。复合型壳代替硅溶胶型壳可大大缩短制壳生产周期。 Explore the process of manufacturing composite shell with silica sol and ethyl silicate, choose the parameters such as interlayer drying time, and provide scientific basis for production and use. Composite shell instead of silica sol shell can greatly reduce the shell production cycle.