| 摘要 |
PURPOSE:To obtain a metal mold for molding plastics having satisfactory heat resistance, releasability and slidability as well as superior wear resistance and a long service life by forming an Al2O3 film or i-C film by ion plating on the surface of a metal mold made or a light alloy. CONSTITUTION:The Al2O3 film or i-C film is formed by ion plating on the surface of a metal mold made of a light alloy such as an Al alloy. The pref. thickness of the formed film is about 1-5mum. The wear resistance of the metal mold is improved, the deterioration of the dimensional accuracy is prevented and the service life is prolonged. The film has very high smoothness and superior thermal stability and improves the heat resistance, slidability and releasability of the metal mold. |
