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Molding method of curved glass

A technology of curved glass and molding method, which is applied in glass molding, glass remolding, glass manufacturing equipment, etc., can solve the problems affecting the appearance quality of curved glass, the appearance of molding glass, and the low yield of curved glass, etc. The glass structure is stable, the finish is improved, and the appearance is beautiful.

Inactive Publication Date: 2018-05-11
安徽晶晶玻璃制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this hot pressing method is used, the glass is prone to stress after forming, and the appearance of the formed glass has serious pitting, indentation and other defects, and the yield rate of the curved glass after forming is low, and there are also problems of unevenness on the upper and lower surfaces. Affect the appearance quality of curved glass

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for forming curved glass, comprising the steps of:

[0023] (1) Preheating of the forming mold: make a forming mold according to the size and curvature of the glass to be processed; preheat the upper mold of the forming mold to 240°C, and preheat the lower mold to 300°C;

[0024] (2) Preheating of the flat glass plate: Preheat the spare flat glass plate to 320°C, and then put it into the preheated forming mold;

[0025] (3) Hot press forming: Put the forming mold with the flat glass plate into the forming furnace to start hot press forming; hot press forming includes four sections: the first section heats up to 380°C at a speed of 30°C / min, and heats it for 10 minutes Afterwards, the second section heats up to 600°C at a speed of 22°C / min, and holds for 7 minutes; the third section heats up to 700°C at a speed of 20°C / min, and holds for 3 minutes; 770°C, heat preservation for 100s; during the hot pressing process, the pressure (the pressure of the pressure hea...

Embodiment 2

[0029] A method for forming curved glass, comprising the steps of:

[0030] (1) Preheating of the forming mold: make a forming mold according to the size and curvature of the glass to be processed; preheat the upper mold of the forming mold to 200°C, and preheat the lower mold to 280°C;

[0031] (2) Preheating of the flat glass plate: Preheat the spare flat glass plate to 310°C, and then put it into the preheated forming mold;

[0032] (3) Hot press forming: Put the forming mold with the flat glass plate into the forming furnace to start hot press forming; hot press forming includes four sections: the first section heats up to 350°C at a speed of 25°C / min, and keeps warm for 12 minutes Afterwards, the second stage heats up to 580°C at a speed of 20°C / min, and holds for 5 minutes; the third stage heats up to 680°C at a speed of 25°C / min, and holds for 3 minutes; 750°C, heat preservation for 80s; the pressure is constant during the hot pressing process, and the pressure is 0.25...

Embodiment 3

[0036] A method for forming curved glass, comprising the steps of:

[0037] (1) Preheating of the forming mold: make a forming mold according to the size and curvature of the glass to be processed; preheat the upper mold of the forming mold to 220°C, and the lower mold to 260°C;

[0038] (2) Preheating of the flat glass plate: Preheat the spare flat glass plate to 280°C, and then put it into the preheated forming mold;

[0039] (3) Hot pressing forming: Put the forming mold with the flat glass plate into the forming furnace to start hot pressing forming; hot pressing forming includes four sections: the first section heats up to 400°C at a speed of 28°C / min, and keeps warm for 15min After that, the second section heats up to 600°C at a speed of 25°C / min, and keeps warm for 6 minutes; the third section heats up to 700°C at a speed of 22°C / min, keeps warm for 2.5 minutes, and the fourth section heats up at a speed of 20°C / min To 760 ℃, keep warm for 120s; the pressure is constan...

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Abstract

The invention provides a molding method of curved glass. The molding method comprises (1) preheating of a mold, (2) preheating of a flat glass plate, (3) hot press molding: putting the mold with the flat glass plate into a forming furnace and carrying out hot press molding, wherein the hot press molding comprises four stages: heating to 350-400 DEG C in the first state, heating to 580-600 DEG C inthe second stage, heating to 680-700 DEG C in the third state and heating to 750-770 DEG C in the fourth stage, (4) staged cooling: carrying out fast furnace cooling in three stages: cooling to 550-620 DEG C in the first stage, cooling to 350-400 DEG C in the second stage and cooling to the room temperature in air in the third stage, and (5) annealing: feeding curved glass into an annealing furnace, heating the curved glass to 200-240 DEG C, keeping the temperature and carrying out furnace cooling to the room temperature. The curved glass obtained by the molding method has a stable structure,high strength, high gloss of the glass surface, beautiful appearance, and no defects such as mold print and indentation.

Description

technical field [0001] The invention relates to the field of glass manufacturing and processing, in particular to a method for forming curved glass. Background technique [0002] With the development of industrialization and informatization, people's living consumption level is also constantly improving and upgrading, especially for the living and using environment, more attention is paid to aesthetics and comfort. [0003] Glass is formed by melting silicon dioxide and other chemicals together (the main production materials are: soda ash, limestone, quartz). A silicate-based non-metallic material that forms a continuous network structure during melting, and gradually increases in viscosity and hardens during cooling to cause it to crystallize. Widely used in buildings, used for wind and light transmission, belongs to the mixture. There are also colored glass that is mixed with certain metal oxides or salts to show color, and tempered glass made by physical or chemical met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B23/023C03B25/00
CPCC03B23/023C03B25/00
Inventor 倪明发许德章李怀正田民选
Owner 安徽晶晶玻璃制品有限公司
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