Cavity of moulded glass lens

Abstract

The present invention relates to a mould kernel for mould-making glass lens. It includes a mould kernel base and a coated film positioned on said mould kernel base, in said mould kernel base a water-cooling radiation system is inlaid, and said coated film is Rex-Iry and SiC atternatively-laminated multilayer film system.

Description

【Technical field】 [0001] The invention relates to a mold core for molded glass lenses. 【Background technique】 [0002] Mold cores are widely used in the molding process, especially in the manufacture of optical glass products, such as aspheric glass lenses, ball lenses, prisms, etc. Direct Press-molding technology can be used to directly produce optical glass products without grinding, polishing, etc. Subsequent processing steps can greatly improve production efficiency and output, and the product quality is good. However, the direct compression molding method has higher requirements on the chemical stability, thermal shock resistance, mechanical strength, and surface smoothness of the mold core. Therefore, the development of compression molding technology mainly depends on the progress of mold core material and mold core manufacturing technology. There are generally the following requirements for mold cores for compression molding: [0003] (1) At high temperature, it ha...

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Problems solved by technology

[0015] However, no matter which mold core structure is mentioned above, the mold core base used is generally carbide or cermet through sintering, and cobalt (Co), nickel (Ni) or molybdenum (Mo), etc. need to be added during the sintering process. When metal elements are used as additives, when the heat is accumulated, the heat cannot be removed in time and effectively, the heat dissipation cannot be well guaranteed, and the temperature of the base of the mold core rises. On the other hand, these metal elements as additives will diffuse to the outer surface of the mold core, thereby reacting with the glass formed by molding, affecting the precision of the mold core and the quality of the molded glass product, and even affecting the injection molding. The service life of mold core and mold

[0016] In addition, for the existing mold core structure, during use, because the heat cannot be discharged in time, the mold core needs to be replaced in time to cool down, and the high replacement frequency affects the improvement of production efficiency; and its cooling method is generally air-cooled. Mainly, that is, the used mold core with high heat is cooled in the gas. The commonly used gas is nitrogen. This cooling method requires a large amount of nitrogen, and because of the high frequency of mold core replacement, the nitrogen demand for cooling high, resulting in high cost

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