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Low-energy-consumption glass hot bending process

A low energy consumption, glass technology, applied in glass forming, glass reshaping, glass manufacturing equipment, etc., can solve the problems of high energy consumption, single shape, high heating temperature, etc., to reduce loss rate, increase pressure, prolong heating The effect of pressing time

Inactive Publication Date: 2019-09-17
CHANGXING KEYI GLASS HANDICRAFT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Early technological production processes such as the method of gravity bending glass plates can only provide flat glass screens with a single shape, which cannot meet the needs of modern people for glass products with exquisite shapes
[0003] Chinese invention patent CN104860514A discloses a production process for hot bending of curved glass. This process has the advantages of short forming time, high forming precision, high yield, low cost, and diverse shapes. The mold is heated for a long time, and the heating temperature is as high as 650-750°C, which consumes a lot of energy, so it is necessary to optimize the process to achieve the effect of saving energy and reducing consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A low energy consumption glass hot bending process, comprising the following steps:

[0024] (1) Cutting pieces: Cut out glass pieces according to the specifications of the original glass sheet;

[0025] (2) Edge grinding: grinding the sharp edge on the glass sheet to form a chamfer on the glass sheet;

[0026] (3) Tempering of small pieces of glass: small pieces of glass are placed in a tempering furnace, and the hardness and strength of the glass surface are improved through chemical strengthening;

[0027] (4) Glass cleaning: rinse the glass sheet with tap water after the edging step, then soak it in acetone mixture, then wash it with deionized water, and finally dry it in an oven with a temperature of 75°C;

[0028] (5) Preheating: Place the cleaned glass pieces horizontally on the conveying device, send them into the preheating device through the conveying device, and heat the preheating device. The first stage: the preheating temperature is 420°C, and the heating...

Embodiment 2

[0037] A low energy consumption glass hot bending process, comprising the following steps:

[0038] (1) Cutting pieces: Cut out glass pieces according to the specifications of the original glass sheet;

[0039] (2) Edge grinding: grinding the sharp edge on the glass sheet to form a chamfer on the glass sheet;

[0040] (3) Tempering of small pieces of glass: small pieces of glass are placed in a tempering furnace, and the hardness and strength of the glass surface are improved through chemical strengthening;

[0041] (4) Glass cleaning: rinse the glass sheet with tap water after the edge grinding step, then soak it in acetone mixture, then wash it with deionized water, and finally dry it in an oven with a temperature of 80°C;

[0042] (5) Preheating: Place the cleaned glass pieces horizontally on the conveying device, send them into the preheating device through the conveying device, and heat the preheating device. The first stage: the preheating temperature is 350°C, and the ...

Embodiment 3

[0051] A low energy consumption glass hot bending process, comprising the following steps:

[0052] (1) Cutting pieces: Cut out glass pieces according to the specifications of the original glass sheet;

[0053](2) Edge grinding: grinding the sharp edge on the glass sheet to form a chamfer on the glass sheet;

[0054] (3) Tempering of small pieces of glass: small pieces of glass are placed in a tempering furnace, and the hardness and strength of the glass surface are improved through chemical strengthening;

[0055] (4) Glass cleaning: rinse the glass sheet with tap water after the edging step, then soak it in acetone mixture, then wash it with deionized water, and finally dry it in an oven with a temperature of 60°C;

[0056] (5) Preheating: Place the cleaned glass pieces horizontally on the conveying device, send them into the preheating device through the conveying device, and heat the preheating device. The first stage: the preheating temperature is 450°C, and the heating ...

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PUM

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Abstract

The invention discloses a low-energy-consumption glass hot bending process, which is improved on the basis of the traditional hot bending process. Heated glycerol is introduced into the process, so that the heating of a mold is cancelled; and meanwhile, in order to reduce the glass loss rate, nitrogen protection is carried out on an operation chamber, the pressure is increased, and the pressurization time is prolonged. In the invention, glycerol is heated, and the principle of canceling the heating of the mold is as follows: under the oxygen-free condition, and under the condition that the temperature is higher than 250 DEG C and the pressure is applied, the glycerol can rapidly undergo dehydration reaction, and then complicated side reactions such as polymerization and the like are performed, so that high molecular polymers can be formed between the mold and glass; in the pressure application process, the high molecular polymers can play a certain buffering and protecting role on the glass; meanwhile, the friction of the mold on the surface of the glass can be reduced, and the loss rate of the glass can be obviously reduced; after the subsequent hot bending process is finished, only a polymer film on the glass surface needs to be peeled off, the process is simple, and the energy consumption is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of glass hot bending, in particular to a glass hot bending process with low energy consumption. Background technique [0002] The hot bending production technology of glass is the field of deep processing technology. It uses one-time forming flat glass as the raw material, and realizes different bending shapes by bending the glass plate by gravity. Among them, the method of bending the glass plate by gravity includes supporting the glass plate on a curved frame or mold close to the final shape, then sending the glass plate into a heating furnace for heating, and finally the glass plate is softened by its own gravity to make its edge Steps such as gradually fitting with a curved frame or mold to bend into a specified shape; the method of pressing a curved glass sheet includes heating and softening the glass sheet, sending the glass sheet into the forming area through a horizontal conveying device, and setting...

Claims

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Application Information

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IPC IPC(8): C03B23/03
CPCC03B23/03
Inventor 钟杰超
Owner CHANGXING KEYI GLASS HANDICRAFT CO LTD