Optical glass molding mould

Abstract

The invention discloses an optical glass molding mould, and belongs to the technical field of optical glass melting molding. The optical glass molding mould is characterized in that a sealed heat circulating passage communicated through a one-way valve is arranged inside a bottom plate, two side baffles and a rear baffle; a heat circulation medium is arranged in the heat circulation passage; a compressed air inlet and a compressed air outlet are arranged on the heat circulation passages which are located at both sides of the one-way valve, wherein the compressed air inlet and the compressed air outlet are both communicated to the outside; the compressed air outlet is provided with a device for preventing the heat circulating medium from splashing, which can effectively bring the heat energy of a high temperature area of the mould to a low temperature area of the mould, so that the temperature of each part of the mould tends to be consistent, to achieve the function of adjusting a mould temperature field. The optical glass molding mould has the advantages that because tin metal liquid with a low melting point is used as the medium, the efficiency is higher than compressed air as a cooling medium, and the temperature of the mould can become higher by heating than water as the cooling medium; the heat transfer of the glass mould can be realized to achieve the consistency with the mold temperature field; the mould has an energy-saving effect, and is particularly suitable for occasions where a high temperature part of the mold needs cooling and a low temperature part of the mould needs heating at the same moment.

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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