Leaking molding device and method for low-viscosity optical glass

Abstract

The invention provides a leaking molding device and method for low-viscosity optical glass. The leaking molding device (100) comprises a leaking pipe (1), a cooling buffer cavity (2) and a drawing molding pipe (3), wherein the wall of the side, close to the leaking pipe (1), of the cooling buffer cavity (2) is provided with a pressure adjusting hole (203); the pressure adjusting hole (203) is connected with one end of a pressure adjusting pipe (4); excepting a cavity inlet (201), a cavity outlet (202) and the pressure adjusting hole (203), the cooling buffer cavity (2) is of a sealed structure; and the on and off of the pressure adjusting pipe (4) are controlled by a control system; and when the pressure adjusting pipe (4) is in an on state, under the control of the control system, the pressure adjusting pipe (4) exhausts or aerates the cooling buffer cavity (2). The leaking molding method performs leaking molding on the low-viscosity optical glass by using the leaking molding device (100).

Description

technical field [0001] The invention belongs to the technical field of leak forming of optical glass, and in particular relates to a leak forming device and a molding method for low-viscosity optical glass rods. Background technique [0002] With the increasingly fierce competition in the market and the continuous development of technology, the requirements for optical glass wool are getting higher and higher from sheet metal, secondary molded parts, primary molded parts to bar material and gob material. The current optical glass molding methods mainly include sheet material, gob material and bar material. Sheet metal forming has been very backward, its material utilization rate is very low, and it needs many processing steps, but its material has strong versatility, so it is still the main optical glass forming method at present. Gobs are very suitable for precision molding of aspheric surfaces, but gobs also have great limitations. For example, for some optical components...

AI Technical Summary

Problems solved by technology

[0004] The traditional leakage molding method has the following disadvantages: since the mold used is open, the volatile components in the molten glass can evaporate from the molten glass through the opening of the mold

Because the glass liquid viscosity of lanthanide glass is low and the fluidity of glass liquid is strong, therefore, in the process of forming lanthanide glass by traditional molding method, the glass liquid is prone to tumbling phenomenon

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