Glass re-shaping process

A molding process, glass technology, applied in glass molding, glass pressing, glass manufacturing equipment, etc., can solve the problems of low product quality rate, irregular glass shape, uneven shrinkage of products, etc., to avoid uneven heating, The structure does not change and the effect of improving the product quality rate

Inactive Publication Date: 2016-08-10
四川省洪雅维国光学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The range of temperature fluctuations in the process of glass reshaping is very large, resulting in uneven shrinkage of the product, which eventually leads to the need to cut off the uneven glass body in subsequent deep processing, resulting in waste of raw materials and a significant reduction in product quality
[0003] In addition, in the existing reshaping process, the softening furnace usually uses one heating zone for heating, and it is not easy to control the softening degree of the glass blank. If the temperature in the furnace body is too low, the surface of the glass blank can be softened but the inner layer cannot be softened. Due to the brittleness of the glass, this kind of glass blank is prone to cracks when it is pressed into a preform, which will affect the quality of optical device products; to soften the inside of the glass blank, it is necessary to increase the temperature in the softening furnace. The lower glass tends to melt beyond the softening point, and the melted glass tends to have irregular shapes during the molding process, and even the glass liquid flows out, causing the preform to fail to meet the weight requirement

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1 The technology of glass reshaping comprises the following steps:

[0032] (1) Preparation of coating: Take asbestos powder, silicone modified acrylate resin, methacryloxysilane, aluminosilicate and isopropanol respectively according to the proportioning ratio of 1:1.5:0.02:0.008:1. After the asbestos powder is ground, pass through a 600-mesh sieve, add methacryloxysilane and isopropanol to mix, put it in a high-speed disperser and disperse evenly for 8 minutes, add silicone modified acrylate resin and aluminosilicate to continue dispersing for 3 minutes , that is;

[0033] (2) Coating the surface of the glass blank with paint: use a sponge scraping tool or a brush to dip an appropriate amount of paint from top to bottom to coat with a coating thickness of 30μm, dry at 70°C for 30min, and then Dry at 100°C for 180min;

[0034] (3) Put the coated glass blank on the porcelain box, transport it into the heating zone in the softening furnace through the conve...

Embodiment 2

[0037] Embodiment 2 The technology of glass reshaping comprises the following steps:

[0038] (1) Preparation of coating: Take asbestos powder, silicone modified acrylate resin, methacryloyloxysilane, aluminosilicate and isopropanol respectively according to the proportioning ratio of 1:2:0.04:0.01:1.5. After the asbestos powder is ground, pass through a 600-mesh sieve, add methacryloxysilane and isopropanol to mix, put it in a high-speed disperser and disperse evenly for 8 minutes, add silicone modified acrylate resin and aluminosilicate to continue dispersing for 3 minutes , that is;

[0039] (2) Coating the surface of the glass blank with paint: use a sponge scraping tool or a brush to dip an appropriate amount of paint from top to bottom to coat with a coating thickness of 30μm, dry at 70°C for 30min, and then Dry at 100°C for 180mmin;

[0040](3) Put the coated glass blank on the porcelain box, transport it into the heating zone in the softening furnace through the con...

Embodiment 3

[0043] Embodiment 3 The technology of glass reshaping comprises the following steps:

[0044] (1) Preparation of coating: Take asbestos powder, silicone modified acrylate resin, methacryloyloxysilane, aluminosilicate and isopropanol respectively according to the proportioning ratio of 1:1.5:0.01:0.005:1. After the asbestos powder is ground, pass through a 600-mesh sieve, add methacryloxysilane and isopropanol to mix, put it in a high-speed disperser and disperse evenly for 8 minutes, add silicone modified acrylate resin and aluminosilicate to continue dispersing for 3 minutes , that is;

[0045] (2) Coating the surface of the glass blank with paint: use a sponge scraping tool or a brush to dip an appropriate amount of paint from top to bottom to coat with a coating thickness of 30μm, dry at 70°C for 30min, and then Dry at 100°C for 180mmin;

[0046] (3) Put the coated glass blank on the porcelain box, transport it into the heating zone in the softening furnace through the c...

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Abstract

The invention belongs to the technical field of glass processing and particularly relates to a glass re-shaping process which includes the following steps: (1) coating the surface of a glass blank body with a coating; (2) arranging the coated glass blank body on a porcelain box, conveying the porcelain box into a heating zone in a softening furnace through a conveying apparatus, and performing zoned stepwise heating to soften the glass blank body; (3) performing die-press moulding to the softened glass blank body in a shaping mould; (4) after the die-press moulding, cooling and demoulding the glass, and removing the coating layer on the surface to obtain a performer of glass. The glass blank body is coated with the heat-resistant and -insulation coating, so that the problems of non-uniformity of glass body and generation of shrinkage grains in the glass, which are caused by non-uniform heating and heat-expansion and cold-contraction and the like factors, during the glass re-shaping process are avoided. Through the zoned stepwise heating method, the softening degree of the glass blank body can be controlled well, so that the glass blank body is easily to press and shape and qualified ratio of products is increased.

Description

technical field [0001] The invention belongs to the technical field of glass processing, and in particular relates to a glass reshaping process. Background technique [0002] Before the glass is prepared for further processing of optical devices, it is often necessary to process the glass blank into preforms of various specifications. The quality of the preform is directly related to the quality of the final optics product. The process of reshaping glass blanks into preforms usually includes the steps of glass softening, compression molding, and cooling and demoulding. During this process, the thermal expansion coefficient of glass plays a vital role in the reshaping of glass. The range of temperature fluctuations in the glass remolding process is very large, resulting in uneven shrinkage of the product, which eventually leads to the need to shave off the uneven glass body during subsequent deep processing, resulting in waste of raw materials and a significant reduction in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00
CPCC03B11/00C03C17/009C03C2217/29C03C2217/445C03C2217/475
Inventor 杨维国牟建国黎明
Owner 四川省洪雅维国光学有限公司
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