Optical Glass Forming Mold

Abstract

The invention discloses an optical glass molding die. The invention belongs to the technical field of optical glass fusion molding. It is characterized in that the inside of the bottom plate, the two side baffles and the rear baffle are provided with a closed heat circulation channel connected by a one-way valve, and there is a heat cycle medium in the heat cycle channel; The compressed air inlet and compressed air outlet lead to the outside; the compressed air outlet is equipped with a device to prevent the thermal cycle medium from splashing out, which can effectively bring the heat energy from the high temperature area of ​​the mold to the low temperature area, so that the temperature of each part of the mold tends to be consistent, and the mold can be adjusted The role of the temperature field. Since the present invention uses tin metal liquid with a low melting point as the medium, it is more efficient than compressed air as the cooling medium, and can heat the mold at a higher temperature than water as the cooling medium, and can realize the heat transfer of the glass mold itself to achieve consistent mold temperature field. energy saving effect. It is especially suitable for occasions that need to cool the high-temperature part of the mold and heat the low-temperature part at the same time.

Description

technical field [0001] The invention belongs to the technical field of melting and forming of optical glass, and in particular relates to a one-time forming device for sheet material, which is mainly used for the one-time drawing forming of low-viscosity lanthanide optical glass sheet material. Background technique [0002] With the development of imaging technology and market, optical glass materials with low refractive index and low dispersion and high refractive index and high dispersion have become the focus of development. However, these glasses generally have the problems of high discharge temperature and low viscosity, and difficult to eliminate forming streaks. The root cause of the difficulty in eliminating forming streaks is that the temperature field of the mold is not uniform, and there are local differences in glass cooling shrinkage, resulting in forming streaks. In order to solve the problem of molding streaks, it is necessary to keep the temperature of each p...

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Problems solved by technology

[0004] The purpose of the present invention is to address the above problems, to provide a molding die mainly used for producing small-viscosity optical glass sheet material, which can transfer the heat from the high-temperature part of the mold to the low-temperature part, which not only significantly improves the temperature field of the molding die of optical glass, but also solves the problem of Since the molding streaks are caused by the inconsistent temperature field of the mold, the energy waste of cooling and heating the mold at the same time is avoided, and the cost is reduced

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