The technical requirements for the lost pattern made from the paraffin-stearin and the shell mould made from colloidal silica in the precision casting were introduced.
介绍用石蜡-硬脂酸低温模料制作熔模，用硅溶胶作粘结剂制造模壳的工艺。
Preparation process of colloidal silica coating and compound shell making technology are introduced. In addition, the application results has been analyzed briefly.
介绍硅溶胶涂料的配制过程及复合制壳工艺，对使用结果作了简要分析。
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