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Glass forming mold and forming device and glass forming method

A technology for forming molds and glass, used in glass forming, glass manufacturing equipment, manufacturing tools, etc., can solve the problem of inability to prepare borosilicate glass with large size and high optical quality, and achieve large size and high optical quality. The effect of improving optical quality and improving optical uniformity

Active Publication Date: 2018-07-13
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present application solves the problem that the existing devices and methods cannot prepare borosilicate glass with large size and high optical quality by providing a glass forming mold, a forming device and a glass forming method, and realizes large size and high optical quality. Preparation of quality borosilicate glass

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  • Glass forming mold and forming device and glass forming method
  • Glass forming mold and forming device and glass forming method
  • Glass forming mold and forming device and glass forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The diameter of the forming die in the forming device used in this embodiment is 800mm; the borosilicate glass that the present embodiment carries out leakage forming is made up of the following components in weight percentage: 68% SiO 2 , 19%B 2 o 3 , 3%Al 2 o 3 , 4.2% Na 2 O, 5%K 2 O, 0.6% ZnO and 0.2% Sb 2 o 3 ;

[0041] The method for forming the above-mentioned borosilicate glass in this embodiment includes the following steps:

[0042] (1) When the glass raw materials of the above components are melted into molten glass and homogenized completely before 3 hours, a layer of boron nitride powder is sprayed on the inner surface of the side mold and the inner surface of the bottom mold of the forming mold, and the water cooling system is turned on. Then heat up the furnace body, the temperature in the furnace body is controlled at 850°C, and the temperature control accuracy is ±1°C;

[0043] (2) After the glass liquid is completely homogenized, the leaking pi...

Embodiment 2

[0048] The diameter of the forming mold in the forming device used in this embodiment is 900 mm; the borosilicate glass that is formed by leakage in this embodiment is composed of the following components in weight percentage: 74.4% SiO 2 , 18%B 2 o 3 , 1% Al 2 o 3 , 1.7% Na2O, 4.2% K 2 O, 0.3% BaO and 0.4% Sb 2 o 3 ;

[0049] The method for forming the above-mentioned borosilicate glass in this embodiment includes the following steps:

[0050] (1) When the glass raw materials of the above components are melted into molten glass and homogenized completely before 5 hours, spray a layer of boron nitride powder on the inner surface of the side mold of the forming mold and the inner surface of the bottom mold, and turn on the water cooling system, Then heat up the furnace body, the temperature in the furnace body is controlled at 820°C, and the temperature control accuracy is ±1°C;

[0051] (2) After the glass liquid is completely homogenized, the leaking pipe is rapidly h...

Embodiment 3

[0056] The diameter of the forming die in the forming device used in this embodiment is 700mm; the borosilicate glass that is formed by leaking material in this embodiment is composed of the following components in percentage by weight: 80% SiO 2 , 12.5% ​​B 2 o 3 , 2.5% Al 2 o 3 , 3.1% Na 2 O, 1%K 2 O, 0.3% BaO and 0.6% Sb 2 o 3 ;

[0057] The method for forming the above-mentioned borosilicate glass in this embodiment includes the following steps:

[0058] (1) When the glass raw materials of the above components are melted into molten glass and homogenized completely before 6 hours, spray a layer of boron nitride powder on the inner surface of the side mold of the forming mold and the inner surface of the bottom mold, and turn on the water cooling system, Then heat up the furnace body, the temperature in the furnace body is controlled at 1000°C, and the temperature control accuracy is ±1°C;

[0059] (2) After the glass liquid is completely homogenized, the leaking p...

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Abstract

The invention discloses a glass forming mold and forming device, and a glass forming method, wherein the glass forming mold is composed of a bottom mold and a side mold detachably connected with the bottom mold, the side mold is a cylinder formed by splicing a plurality of arc-shaped side mold plates, and the bottom mold is formed by splicing a plurality of bottom mold plates. The problem that a conventional device and method cannot prepare large-size and high-optical-quality borosilicate glass is solved, and preparation of large-size and high-optical-quality borosilicate glass is realized.

Description

technical field [0001] The invention relates to the field of glass manufacturing, in particular to a glass forming mold, a forming device and a glass forming method. Background technique [0002] With the rapid development of modern optics, optical design puts forward higher requirements for the optical uniformity and size specifications of lens materials, especially for borosilicate glass with large size and high optical uniformity. Borosilicate glass has high viscosity and long material properties, and forming is one of the key processes in its preparation. At present, there are mainly three forming methods of borosilicate glass: one is to prepare glass substrates by float method or overflow method, the substrate has double free surfaces, high flatness, and subsequent grinding and polishing can be avoided, and the daily production capacity of this forming method is relatively low. Large, output ≥ 5 tons / day, suitable for industrial production, but this method is limited...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B19/02
CPCC03B19/02
Inventor 王衍行祖成奎何坤陈江周鹏王琪
Owner CHINA BUILDING MATERIALS ACAD
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