Two-step molding method of thin plate glass pre-pressing

Abstract

The invention relates to a two-step forming method for pre-pressing and maintaining a thin plate glass, which belongs to the field of liquid crystal display panel glass substrate and panel forming. It installs a pair of pre-pressing rollers with narrow slits parallel to the cross-sectional direction of the molten glass ribbon under the outlet of the high-temperature molten glass, and pre-presses the molten glass ribbon left by the outlet of the molten glass with narrow slits. Under it are installed two crawlers composed of flat track shoes that run relatively synchronously, and the pre-pressed glass liquid belt is introduced into it, and after extrusion, shaping and gradually cooling and annealing, it becomes the extrusion gap of the flat track shoes on the same track. Thick sheet glass. As shown in Figure 1. Because of the forced pressing of mechanical molds, the thickness and flatness precision of thin plate glass can be guaranteed. The surface of the glass sheet is controlled by the surface quality of the extruded flat die, so mirror precision can be achieved. This molding method is a molding technology for flat display substrates and touch panel glass of mobile phones, car GPS, PDA, learning machines, notebook computers and other products.

Description

technical field

[0001] The field of the thin-plate glass pre-pressing two-step molding method belongs to the field of liquid crystal display panel glass substrate and panel molding. It is a forming technology for display substrate glass of mobile phone display, car GPS system display, PDA display, learning machine display, notebook computer display, desktop computer LCD display, LCD TV display and so on. Background technique

[0002] For a long time, the production and molding methods of liquid crystal display glass substrates have been relatively mature, including float process, overflow down-draw process, notch down-draw process and other technical methods. However, each of the above-mentioned methods has various disadvantages. The common disadvantage is that not only the molding quality of the thin plate glass depends on the parameters that are difficult to be controlled precisely, such as the melting state of the glass, the molding temperature, the traction speed, and th...

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