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Method and device for heating glass plate in annealing preparation

A technology for preparing and glass plates, applied in glass manufacturing equipment, glass tempering, manufacturing tools, etc., can solve problems such as lack of availability, deterioration of glass surface optical quality, and contamination

Inactive Publication Date: 2005-09-28
TAMGLASS LTD OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the circulating air gradually becomes dirty, degrading the optical quality of the glass surface, or even clogging the nozzles
Another problem associated with known furnaces is the control of the widthwise profile of convective heating, or the complete inability to provide a widthwise profile for convective heating

Method used

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  • Method and device for heating glass plate in annealing preparation
  • Method and device for heating glass plate in annealing preparation
  • Method and device for heating glass plate in annealing preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The glass sheet, heated to the annealing temperature, is conveyed in the furnace 1 on rollers 13, usually in a back and forth swing, before being fed into the annealing station 2, where both surfaces of the glass sheet are cooled in a known manner annealing.

[0011] The furnace 1 is equipped with an upper convective heating section 11 comprising ducts arranged along the length (longitudinal) of the furnace, some of which are arranged side by side and have convective heating air which discharges downwards or obliquely downwards through the gaps between the upper heating resistors 12 the orifice. In order to preheat the upper convection heating air, the air circulates inside the furnace in ducts 10 for a distance substantially equal to half the length of the furnace before reaching the perforated convection heating ducts 11 .

[0012] Correspondingly, the lower convective heating section 14 comprises ducts arranged along the length of the furnace, some of which are arra...

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PUM

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Abstract

A method and apparatus for heating glass sheets in preparation of tempering. A furnace (1) is provided with upper and lower convection blasting conduits (11, 14) extending lengthwise of the furnace. The furnace is also provided with upper and lower radiation heating elements (12, 16). The convection heating air is pressurized with a compressor (3), cleaned with a filter (4). The upper convection heating air is heated with air discharged from the furnace in a plurality of separate heat exchangers (7), through which the convection heating air is passed into the upper convection blasting conduits (11). The amount of air discharged from the furnace (1) through the heat exchangers (7) is substantially equal to that blasted into the furnace for convection heating.

Description

technical field [0001] The present invention relates to a method for heating a glass sheet in preparation for annealing, the method comprising heating a horizontal glass sheet with upper and lower convective blasts and upper and lower radiant heating, pressurizing the convectively heated air with a compressor and using The filter performs the cleaning and adjusts the lateral distribution of the upper convective heating by controlling the amount of convective air to be respectively blown into the multiple transverse parallel heating zones. [0002] The invention also relates to an apparatus for heating glass sheets in preparation for annealing, the apparatus comprising horizontal conveying rollers and upper and lower convective heating elements, upper and lower radiative heating elements, a device for generating pressurization of the convective heating elements A compressor for convectively heated air, and an oil and / or particulate filter through which convectively heated air p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B25/08C03B29/08
CPCC03B29/08C03B27/0417C03B27/044
Inventor J·维特卡拉M·莱波宁T·佩索宁P·雷乌纳梅基
Owner TAMGLASS LTD OY