A glass substrate overflow molding crystallization control device

Abstract

The invention discloses a glass substrate overflow forming crystallization control device. By setting an overflow brick body, a drainage groove for draining glass liquid is arranged on the upper end of the overflow brick body. The lower end of the overflow brick body is a V-shaped structure, and the overflow The two ends of the flow brick body are respectively equipped with a drainage baffle. One end of the drainage groove on the overflow brick body is a liquid inlet. In the process, the drainage baffles fixed at both ends of the overflow brick body are used to prevent the glass liquid from extending along the two ends of the overflow brick body, thereby ensuring the accuracy of the production size of the glass substrate. By setting the heating device outside the drainage baffle, through the The heating of the drainage baffle can effectively prevent the molten glass from flowing out from both sides of the overflow brick body and crystallize near the far and near sides of the root, thereby ensuring product quality and improving production efficiency.

Description

technical field [0001] The invention relates to the technical field of substrate glass manufacturing, in particular to a crystallization control device for overflow molding of a glass substrate. Background technique [0002] The substrate glass used in the production of flat panel displays such as TFT-LCD (Thin Film Transistor Display) and PDP (Plasma Display Panel) is manufactured by overflow down-drawing. In the forming process, molten glass melted by a glass melting furnace is supplied to Melt overflow down-draw molding device to manufacture. The overflow down-draw method is a kind of substrate glass production technology. The molten glass overflows through the top of the overflow tank and flows down from the outer surfaces of both sides of the overflow tank respectively, and meets at the bottom of the tank, cooling the clamping mechanism at both ends. Under the traction of the glass, the molten glass then enters the glass forming area of ​​the substrate. The overflow d...

AI Technical Summary

Problems solved by technology

When the temperature gradient of the overflow brick changes from top to bottom, the temperature of the glass will fall into the crystallization area, and crystallization will occur on both sides of the overflow brick near the root, which will directly affect the production fluctuation and product quality.

[0004] The traditional overflow device is carried out under the traction of the cooling and clamping mechanism at both ends of the overflow brick. It is almost impossible to add a heating device to control crystallization in the cooling and clamping mechanism, and it is easy to cause the deformation of the drainage plate

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