Process Investigation of Colloidal Silica Shell Mold
Author of the article:WANG Rong;GAO Yingmin;LIU Junying
Author's Workplace：Shaanxi Hongyuan Aviation Forging Co., Ltd., Sanyuan 713801, China
Key Words：colloidal silica coating formula shell mold thickness
Abstract：
By adjusting the coating proportion of different layers of silica sol mold shell, the suitable process parameters of shell making were obtained. The results show that the silica sol shell should be of certain thickness to reduce the phenomenon of under-casting. According to the test results, the recommended shell thickness is about 6.5 mm;When the silica content in silica sol is about 27%.28%, the mold shell has good reducibility and can reduce the influence of mold shell on casting shrinkage. Reducing the content of silica in the silica sol can improve the collapsibility of the shell and facilitate the cleaning of the shell.
