在製造業，縮短產品上市是一個重要的話題，間接造模法是讓新產品縮短上 市時間與花費的一個好方法。於間接造模法中，矽膠模具經常被運用試作一項新 產品之樣品，所以了解矽膠模具之壽命為一個重要研究方向。本研究運用低壓射 蠟與真空注型來評估矽膠模具之壽命。研究結果發現，矽膠模具之內壁表面粗糙 度將隨著翻製蠟型次數增加而增加，並於翻製蠟型25 次以上時達到飽和，因此 當矽膠模具運用於真空注型時，真空脫泡時間需隨之增長。本研究發現評估矽膠 模具壽命，必須包含模具內壁表面粗糙度與整體模具彈性。

Shortening the time-to-market is an important issue in the manufacturing industry. Indirect tooling technology was regarded as a promising approach of reducing time and cost to the market in a new product development phase. Silicone rubber mold was frequently employed in the indirect tooling. In this study, the service life of silicone rubber molds was investigated using both wax injection molding and vacuum casting. The experimental results revealed that the average roughnesses of the inner surface of silicone rubber mold were increased with increasing the number of runs and saturated after 25 test runs. The degassing time needs to be increased with increasing the number of runs in the vacuum casting process. The major criteria for judging the service life of silicone rubber molds are surface features and elasticity of silicone rubber molds.