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A heating furnace used for drawing willow glass by secondary melting method

A flexible and secondary melting technology of far drawing, which is applied in glass forming, glass reshaping, glass manufacturing equipment, etc., can solve the problems of no heating furnace, description, etc., and achieve good flatness, small thickness deviation, and high temperature The effect of small fluctuations

Active Publication Date: 2015-01-28
GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned patents all belong to the secondary thinning method; in the secondary thinning process, the heating furnace is one of the most important equipment, and there is no detailed description of the heating furnace in the published patents

Method used

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  • A heating furnace used for drawing willow glass by secondary melting method
  • A heating furnace used for drawing willow glass by secondary melting method
  • A heating furnace used for drawing willow glass by secondary melting method

Examples

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Effect test

Embodiment 1

[0038] Embodiment 1. A heating furnace for drawing flexible glass by the secondary melting method is divided into a high temperature zone and an annealing zone, which are separated by a light heat insulating thin plate 3, and the width between the thin plates on both sides is 10mm. The high temperature area is heated by two silicon carbide heating rods, and the length of the hot end of the heating rod and the furnace is 600mm. The length and height of the long board in the vapor chamber 8 combination are 660mm and 200mm respectively, and the width and height of the short board are 50mm and 200mm respectively. The rated power of the high temperature area is 5kW; the rated power of the temperature compensation filling blocks at both ends is 1kW, and the material of the heating wire is nickel-chromium Ni80Cr20 alloy. The furnace body materials used on both sides of the high temperature zone are 50mm thick polycrystalline mullite fiber cotton and 65mm thick lightweight insulation ...

Embodiment 2

[0041] Embodiment 2. A heating furnace for drawing flexible glass by the secondary melting method, which is divided into a high temperature zone and an annealing zone, which are separated by light heat insulating thin plates 3, and the width between the thin plates on both sides is 20 mm. The high temperature area is heated with 4 silicon carbide heating rods, and the length of the hot end of the heating rod and the furnace is 400mm. The length and height of the long boards in the vapor chamber 8 combination are 460mm and 100mm respectively, and the width and height of the short boards are 80mm and 100mm respectively. The rated power of the high temperature area is 10kW; the rated power of the temperature compensation filling blocks at both ends is 2kW, and the heating wire is made of iron-chromium-aluminum 0Cr23Al5 alloy. The furnace body materials used on both sides of the high temperature zone are 100mm thick polycrystalline mullite fiber cotton and 130mm thick lightweight ...

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Abstract

A heating furnace used for drawing willow glass by a secondary melting method is provided. The heating furnace comprises a furnace body having a rectangular cross section and heating devices disposed in the furnace body. The middle of the furnace body is provided with a heating path along the width direction. The heating furnace is characterized in that: the heating devices are divided into a high temperature zone and an annealing zone from top to bottom; the high temperature zone and the annealing zone are separated by a light thermal-insulating thin plate; the temperature of each zone can be controlled individually according to needs; heat homogenizing plates have functions of homogenizing heat distribution, allow temperature distribution in the heating path to be more uniform than temperature distribution by adoption of direct radiation heating with heating rods, and allow temperature fluctuations to be smaller; the willow glass having a thickness of 0.03-0.2 mm, a width of 20-2000 mm and a length longer than 5 m and having good flexibility can be drawn; and the willow glass is low in thickness deviation and good in flatness.

Description

technical field [0001] The invention belongs to the technical field of secondary thermoforming equipment for glass, and relates to a heating furnace, in particular to a heating furnace for drawing flexible glass by a secondary melting method. Background technique [0002] In June 2012, at the International Information Display Annual Conference held in Boston, Corning demonstrated its flexible glass sample—Willow Glass, which is a bendable glass with a thickness of less than 0.1mm; its unique bendability and wide The application prospect has aroused people's great interest. However, this kind of ultra-thin glass is not the first invention of Corning. Its production can be traced back to the former Soviet Union in the 1960s. The Glass Technology Teaching and Research Office of Mendeleev Institute of Technology in Moscow used the method of vertically pulling glass melt Thin film glass with a thickness of 5-50 μm is prepared, and the research purpose is to use thin glass to man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B23/037
Inventor 智广林袁坚程金树吴磊舒向平郑伟宏王瑞璞史连莹张鹏
Owner GLASS TECH RES INST OF SHAHE CITY OF HEBEI PROVINCE
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