Shaping device of fluorophosphate optical glass and its shaping method

Abstract

This invention provides a fluorophosphate optical glass molding equipment, including mold. Mold described composed by the end of mold, side die and block, in Mold also provided with cooling flat, air vents are installed on the flat. Fluorophosphate optical glass molding apparatus molding methods includes the following steps: 1) glass fluid flows out of the material tube and flow into Mold; 2) in Mold the glass fluid flow through the upper surface cover the cooling flat, inert gas through the air vents on the cooling flat blow to glass solution surface, so as soon as cool glass liquid for molding. The invention set cooling flat on the mold, through air vents blowing inert gas, so as soon as cooling liquid glass, to avoid the glass at high temperatures causing the volatile stripes, ensuringthe quality of products; In addition, the invention uses graphite mold to avoid corrosion.

Description

technical field [0001] The invention relates to a forming device and a forming method of optical glass, in particular to a forming device and a forming method of fluorophosphate optical glass. Background technique [0002] Fluorophosphate optical glass is a special optical glass with low dispersion, low refraction, and can be used to eliminate the secondary spectrum. It has a low softening point, and the viscosity of fluorophosphate glass is short. And it has strong volatility, it can be made into aspheric lens after one or two presses, and it is an excellent optical material for the production of digital products. [0003] After the optical glass is melted from powder to qualified glass, in order to keep the liquid glass in a certain shape after solidification, a forming process must be used to gradually solidify the shape of the glass when it changes from liquid to solid. At present, the main forming processes of optical glass are Two types: 1) Strip forming process: In t...

AI Technical Summary

Problems solved by technology

[0004] At present, the molding of fluorophosphate glass generally adopts a strip molding process. The upper surface of the molten glass is not in contact with the mold and is directly exposed to the air. This will cause serious volatilization of the components of the high-temperature molten glass, and the surface of the product is very deep. The yield rate of the product is very low; in addition, because the material of the forming mold is ductile iron, it is easily corroded by fluorophosphate glass under high temperature conditions

Images