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Convection heating furnace for a tempered glass sheet

A convection heating, glass plate technology, applied in the field of convection furnace, can solve the problems of high surface temperature, shortened service life, etc.

Active Publication Date: 2010-03-03
GLASTON FINLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of heating resistors as radiant heaters, they have high surface temperatures, which inevitably lead to a shortened service life

Method used

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  • Convection heating furnace for a tempered glass sheet
  • Convection heating furnace for a tempered glass sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] figure 1 A part of a glass sheet tempering furnace is shown, including the furnace walls (not shown) and traction tracks formed by rotating rollers 3, on which the glass sheet 1 can be moved in the desired manner during or after processing. In order to direct the blast air onto the glass surface, there is an extended blast channel 2 in the furnace, which is installed in the direction of the glass pane 1 in the present embodiment. The blown air is directed to the distribution channel 4 from one or several blower devices. A heating resistor 5 is installed in the blast channel 2 along the direction of the blast channel 2 . The channel widens downwards below the heating resistor 5 and ends at the perforated bottom 9 . At least the bottom part is made of sheet metal and holes 7, 8 are punched out therein, most suitably with a punching tool to make a downward ring around the holes ( Figure 1-3 ). A thin plate refers to a plate having a thickness of less than 3mm.

[001...

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PUM

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Abstract

A convection furnace for a tempered glass sheet (1), into which furnace the glass sheet arrives along a hauling track, as on turning rolls (3), and the furnace has also heating resistances (5) againstglass sheet (1) for heating the blast air, a blast apparatus and blast channelling (4), (2) for blasting said air against the glass sheet. The blast channelling comprises elongated channels (2) in the glass sheet (1) direction, inside of which there is at least a part of each blast air heating resistance (5) and each channel (2) has below the resistance line a broadening and in the broadening a bottom part (9), whereby bottom part (9) is furnished with blast holes (7, 8).

Description

technical field [0001] The invention relates to a convection furnace for tempering glass sheets, the glass sheets entering the furnace along a traction track, such as on rotating rollers, the furnace additionally having a heating resistor next to the glass sheet for heating the blown air, Blowing means and blowing channels for blowing said air towards the glass pane. Background technique [0002] Previously known from the patent specification EPO0910553B1 is a tempering furnace for glass sheets as described above, which furnace has an extended air blast channel. In these channels there are heating resistors arranged in the direction of the channel, which are adjusted mainly downwards against the glass by means of special radiating surfaces. Blast air is blown from the upper part of the channel leading to the radiant tube which partially surrounds the heating resistor, and the channel continues down against the perforated special radiant plate. Due to the radiant channels, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B27/044C03B29/08
CPCC03B29/08Y02P40/57C03B27/044
Inventor J·耶尔维宁P·拉米K·韦海-安蒂拉
Owner GLASTON FINLAND