| 摘要 |
PURPOSE:To provide the titled mold giving a glass article having excellent optical surface property without using grinding nor polishing treatment, by applying a specific ceramic thin film to the molding surface of the main body of a mold made of a metallic material. CONSTITUTION:The surface (pressing surface) of the main body of the mold 1 made of a metallic material such as martensite stainless steel, tool steel, etc. is coated with a ceramic layer 2 made of Si3N4, HfN, etc. by physical vapor deposition or chemical vapor deposition process to obtain the objective mold for molding a glass article. |
