Method for accurately controlling viscosity of molten state glass in platinum channel

A precise control, molten state technology, applied in glass forming, glass forming, glass manufacturing equipment, etc., can solve the problems of equipment failure, heat dissipation deviation, and no consideration of current carrying capacity of electric heating circuit, etc., to reduce energy consumption , high degree of automation and simple operation

Active Publication Date: 2010-05-19
北京远大信达科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

In the electric heating control of the platinum channel in the existing control method, only the conventional heat dissipation power is considered, and the phase se

Method used

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  • Method for accurately controlling viscosity of molten state glass in platinum channel
  • Method for accurately controlling viscosity of molten state glass in platinum channel
  • Method for accurately controlling viscosity of molten state glass in platinum channel

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Experimental program
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Embodiment Construction

[0065] The platinum channel is divided into zones and sections according to the process conditions, and flanges for power supply are installed at the ends of each zone. For a segment, all non-end flanges and partly end flanges used for the segment are shared by at least two electric heating circuits with current flowing through at least two circuits at the same time.

[0066] The structure of the flange includes a current sharing outer ring 4 , a current leading inner ring 3 , a flanging structure 6 for welding positioning, and a current leading end 5 .

[0067] The flange structure also includes a cooling water channel, which is connected to a cooling water circulation system regulated by a management circuit.

[0068] The above-mentioned management circuit includes a matching voltage-regulating power regulator, which applies the regulated voltage to the platinum channel of the corresponding area and section through the flange.

[0069] The above management circuit structure...

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Abstract

The invention relates to a method for accurately controlling the viscosity of molten state glass in a platinum channel, which is used for controlling the quality of TFT-LED glass substrate in a production process. The method specifically comprises the following steps: (1) additionally installing electrifying flanges in the platinum channel by areas and sections according to a technical route; (2) determining electric power according to the position of each section of platinum channel and maximum current magnitude needed in an electric heating process; (3) applying the controllable AC voltage to each section of platinum channel by flanges; (4) selecting and matching a current phase sequence which is matched with each common flange; (5) calculating and determining standard temperature value intervals of all the areas and the sections, and the power flow interval of the platinum channel corresponding to the standard temperature interval in the section; (6) setting a management circuit which is used for sampling the on-line temperature of all the sections and conducting the closed loop control on the voltage of the loading areas and sections. The method can ensure the technical target of molten glass which enters a forming procedure, save energy resources and have automatic operation.

Description

technical field [0001] The invention relates to a method for precisely controlling the viscosity of molten glass in a platinum channel, and the application of the method and equipment for temperature control by means of electric heating in the production of TFT-LED glass substrates. Background technique [0002] In the TFT-LCD glass substrate production process, in order to reduce the composition heterogeneity and gas inclusions caused by the contact between the molten glass and the refractory material, a platinum channel is usually set up between the melting pool and the forming equipment. . The platinum channel is responsible for the clarification, homogenization, stirring and temperature regulation of molten glass. It plays an important role in the final molding of the TFT-LCD glass substrate and the technical indicators after molding. In each section of the platinum channel, the viscosity of the molten glass requires a standardized viscosity to achieve the specificatio...

Claims

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Application Information

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IPC IPC(8): C03B5/24G05B19/04G05D23/19C03B17/06
Inventor 宋金虎斯沿阳刘文泰李兆廷
Owner 北京远大信达科技有限公司
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