Forming cooling device and method for fluorophosphate optical glass
A technology of optical glass and fluorophosphate, which is applied in glass molding, glass molding, glass manufacturing equipment, etc., can solve the problems of local glass liquid up and down convection, optical glass manufacturing difficulties, and different refractive index, so as to avoid components The effect of loss, lowering temperature, and reducing the number of crystallization times
Active Publication Date: 2022-06-17
HUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD
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Problems solved by technology
Low-refraction and low-dispersion optical glass is mainly fluorine-containing phosphate glass. Due to the particularity of its formula, it is difficult to manufacture this type of optical glass
There is a large amount of fluoride in the formula of this type of optical glass. During the process of glass melting and molding, a large amount of fluoride in the glass composition volatilizes, which causes the difference in refractive index and forms serious volatilization streaks; in addition, the viscosity of fluorophosphorus glass is relatively high. Small, when the glass liquid flows out of the leakage pipe, the low viscosity and high flow rate glass liquid can easily cause eddy currents, resulting in serious local convection of the glass liquid up and down, making the glass liquid on the surface of different refractive index penetrate into the inside, resulting in serious surface streaks
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[0030] like figure 1shown. The structure of a molding cooling device for fluorophosphate optical glass according to the present invention includes a main air intake pipe 1, a heat exchange chamber 2, a rear air intake pipe 3, a side mold 4, a rear regulating valve 5, a glass plate 6, a rear cooler 7, and ceramic fibers. Insulation ring 8, leakage tube 9, upper electrode sheet 10, ceramic fiber wrapping layer 11, lower electrode sheet 12, leakage nozzle 13, bottom mold 14, rear baffle 15, front cooler 16, front regulating valve 17, The front air intake tube 18 is composed. Among them, the front cooler 16 and the rear cooler 7 are semi-cylindrical cavities with the same structure and the same structure and can be buckled with each other. 85° conical bottom surface, the conical bottom surface is covered with conical surface exhaust holes 21, and the conical bottom surface is close to the inner cylindrical surface 24 with a circumferential surface exhaust groove 22 distributed a...
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The name of the present invention is a forming and cooling device and method for fluorophosphate optical glass. It belongs to the technical field of optical glass manufacturing. It mainly solves the problem of volatilization streaks and surface streaks in the molding of fluorophosphate optical glass. Its main features are: including a glass leaking device, a forming mold, a cooler and a main air intake pipe, the glass leaking device includes a leaking tube with a leaking nozzle at the lower end and a heating device for the leaking tube; The air pipe communicates with the cooler; the bottom surface of the cooler is provided with vent holes facing the molding die. The dry gas can flow into the cooler through the main air intake pipe and blow out from the air hole of the cooler to realize the forced cooling of the molten glass, so as to rapidly increase the viscosity of the molten glass, reduce the convection of the molten glass, and eliminate or reduce the fluorophosphate glass. Evaporation streaks and surface streaks produced during molding.
Description
technical field [0001] The invention belongs to the technical field of optical glass manufacturing. Specifically, it relates to a molding cooling device and method for fluorophosphate optical glass. Background technique [0002] With the development of high-definition imaging technology, there are more and more applications of low-refractive and low-dispersion optical glass. Low-refractive and low-dispersion optical glass is mainly fluorine-containing phosphate glass. Due to the particularity of its formulation, it is difficult to manufacture this type of optical glass. There is a large amount of fluoride in the formulation of this type of optical glass. During the process of glass melting and molding, a large amount of fluoride in the glass composition volatilizes, resulting in different refractive indices and serious volatilization streaks; in addition, the viscosity of fluorine phosphorous glass is relatively high. When the glass liquid flows out of the leakage tube, th...
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IPC IPC(8): C03B17/06
CPCC03B17/067
Inventor姜敬陆李攀
OwnerHUBEI NEW HUAGUANG NEW INFORMATION MATERIALS CO LTD