| 摘要 |
To mold the lenses, for vehicle lamps and direction signal flashers, a polymer material is heated to softening point, and is injected into a cavity (22) between two walls (24,26) in the mold. The mold walls (24,26) are cooled to a given temperature level, and the molded lens is removed. The temperature of the polymer for injection is set at 320-360 degrees C, and the walls are cooled after molding to a temperature level of 150-250 degrees C or 220 degrees C. Directly after the lens has been molded and cooled, one surface of the molding is metallized in an additional stage, by vapor deposition in a vacuum or cathode sputtering. The surface can also be metallized by electrolysis with a chemical attack followed by chemical deposition on a metalled layer followed by the use of an electrolyte to give one or more metal layers.
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