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Curved glass and preparation method thereof

A technology of curved glass and calcite, applied in glass manufacturing equipment, glass molding, glass re-molding, etc., can solve the problems of inconsistent side height of hot bending, glass can not be formed, glass curved surface indentation, etc., to reduce Lamination marks, good flatness and high forming precision

Inactive Publication Date: 2020-10-30
马鞍山楚锐科技信息咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when using traditional hot bending molds to heat bend glass, the formed glass cannot be completely shaped according to the shape of the mold, especially the lower mold forming angle is small, and there will be unevenness of the glass plane. The height of the sides of the glass is inconsistent, the height is uneven, or even the problem of stacking. In addition, the curved surface of the glass after molding will produce heavy indentations.

Method used

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  • Curved glass and preparation method thereof
  • Curved glass and preparation method thereof
  • Curved glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The specific steps of the production method are as follows:

[0035]In the molding stage, the concave positioning module 3 is fixed, and the glass blank is placed in the concave mold groove 302, so that the convex positioning module 1 is in contact with the glass blank; in the preheating stage, the convex positioning module 1, the concave positioning module 3 and the glass The blank plate is preheated, and the temperature of the convex positioning module 1 is less than or equal to the temperature of the concave positioning module 3, and the temperature of the convex positioning module 1 is less than or equal to the glass transition temperature of the glass blank plate, and then the convex positioning module 1 and the concave positioning module 3 Put it into the forming furnace together with the glass blank, heat until the glass is softened, and keep it warm for 35-45 minutes, then vacuumize the hot bending mold, a vacuum is formed in the hot bending mold, and the softene...

Embodiment 2

[0037] The specific steps of the production method are as follows:

[0038] Take out the hot bending mold from the forming furnace, gradually cool down the temperature of the hot bending mold and the glass shell in the hot bending mold until it cools down to room temperature, take out the glass shell to get a curved glass semi-finished product, and roughen the surface of the curved glass semi-finished product; then the curved surface of the semi-finished product Steps for glass to be edged. Specifically, use a CNC edging machine for edging treatment, wherein the CNC edging machine is, for example, Beijing Jingdiao CNC edging machine, and the process parameters for edging treatment are: the feed speed is 400mm / s-800mm / s, the spindle The rotating speed is 15000r / min~35000r / min, the positioning height is 4mm~8mm, and the time for edging treatment is 60s~200s;

Embodiment 3

[0040] The specific steps of the production method are as follows:

[0041] After the curved glass is edged, the curved glass is polished in a polishing solution. The specific steps are: install the curved glass after the edge grinding in the polishing mold, and install the polishing mold on the polishing equipment , attach polishing material on the polishing equipment, add polishing liquid, and perform polishing.

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Abstract

The invention belongs to the technical field of glass processing, and particularly relates to curved glass and a preparation method thereof. Raw materials for preparing the curved glass comprise quartz sand, soda ash, calcite, feldspar, carbon powder and an active agent, wherein the active agent is mainly prepared from 8%-11% of SiO2, 12%-19% of an active oxidant, 0.1%-3% of Al2O3, 12%-16% of Na2O, 20%-28% of CaO, 30%-40% of volatilization amount and 0.01%-1% of Fe2O3. When the hot bending die is used for hot bending of glass, the glass can be bent so that most of folding marks can be reduced,the non-curved surface part is good in flatness, bending from top to bottom is carried out, the phenomenon that the thickness is uneven due to extrusion deformation of all faces of the glass is avoided, the influence of bending is only limited to softening of the glass on the side edges, the amount of the integrally involved softened glass is small, control is easy, the influence of gas is small,the softened glass can also play a curved surface forming role under the action of gravity, and the forming precision is high.

Description

technical field [0001] The invention relates to the technical field of glass processing, in particular to a curved glass and a preparation method thereof. Background technique [0002] 3C products such as smart phones, smart watches, tablet computers, wearable smart products, dashboards, etc. have successively appeared 3D products, leading the development direction of 3D curved glass, for example, from flat touch screen mobile phones to 3D curved mobile phone screens, greatly Opened up people's horizons. At present, people usually use cold processing technology to manufacture 3D curved glass for touch screens. The basic process of this cold processing technology is: flat glass-shape removal and grinding-rough grinding-finish grinding-surface polishing-outer diameter processing and shaping-3D curved glass . [0003] However, when using traditional hot bending molds to heat bend glass, the formed glass cannot be completely shaped according to the shape of the mold, especiall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C6/04C03B23/035
CPCC03B23/0357C03C1/00
Inventor 李波
Owner 马鞍山楚锐科技信息咨询有限公司
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