Producing method of vacuum glass with edge sealed under normal pressure and opening sealed under low pressure in vacuum furnace

Abstract

The invention relates to a producing method of vacuum glass with the edge sealed under normal pressure and the opening sealed under low pressure in a vacuum furnace. The method includes: cutting plates, arranging supports, combining sheets, placing low-melting-point glass powder at the edge, placing air suction pipes on lateral sides and lateral corners, completing edge sealing during rising of interior temperature of a normal pressure furnace from 380 DEG C to 500 DEG C, taking the glass out of the furnace after cooling, moving the glass into the vacuum furnace for vacuumizing, sealing the air suction pipes by electric heating, putting vacuum glass abreast in the vacuum furnace, evacuating the vacuum furnace according to 1X10-1pa-1X10-5pa, controlling the furnace temperature from 100 DEGC to 310 DEG C, and switching on an electric heating device preset at the root of each air suction pipe to fuse glass tube seals. Vacuumization is performed when the vacuum temperature is lower than the edge sealing temperature, secondary melting of sealed low-melting-point glass powder and humidity in a vacuum cavity can be avoided, and high vacuum degree, high yield and low air leakage rate can be achieved. Further, partially sealing the air suction pipes can save energy effectively, production efficiency can be improved effectively by arranging the vacuum glass abreast and sealing the air suction pipes at fixed positions, and quality of the vacuum glass can be guaranteed.

Description

technical field [0001] The invention belongs to the field of vacuum glass, in particular to a method for manufacturing vacuum glass with normal-pressure edge sealing and low-pressure sealing in a vacuum furnace. Background technique [0002] At present, the traditional vacuum glass manufacturing method is to lay supports on the substrate glass, and then combine the sheets, seal the edges, make air extraction holes, install air extraction pipes, and place the two pieces of glass flat in the heating furnace for heating and edge sealing. Then take it out for vacuuming, and after fusing the exhaust pipe, vacuum glass can be formed. Alternatively, heating and edge sealing and vacuuming can also be carried out directly in a vacuum heating furnace. The disadvantages of the above method are: 1. In the traditional vacuum heating furnace, a large number of bubbles will be generated in the glass frit under high temperature and low pressure, which brings difficulties to the large-area ...

AI Technical Summary

Problems solved by technology

The disadvantages of the above method are: 1. In the traditional vacuum heating furnace, a large number of bubbles will be generated in the glass powder under high temperature and low pressure, which will bring difficulties to the large-area edge sealing around the vacuum glass and increase the probability of air leakage.

2. Existing vacuum glass uses a suction pipe when vacuuming, the air resistance is too large, and the vacuum degree in the vacuum glass cavity is not high

3. Existing vacuum glass generally adopts a single-block air extraction method, and the production efficiency is low