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铁路信号灯用玻璃透镜模具（以下简称透镜模具）的工作条件是：将1000℃左右的玻璃料置入经预热至600℃左右的模具中压制成形。经测定，模具工作表面温度为600～850℃。铁路信号灯是铁路运输的“眼睛”，对安全运输至关重要。为保证玻璃透镜的良好聚光性、透光性和信号灯射程等
The working conditions of the glass lens mold for railway signal lamps (hereinafter referred to as the lens mold) are as follows: a glass frit of about 1000 ° C. is placed in a mold preheated to about 600 ° C. to be press-formed. After determination, mold surface temperature of 600 ~ 850 ℃. Railway semaphores are the “eyes” of rail transport and are crucial for safe transport. In order to ensure good condenser glass lens, light transmission and signal range and so on