Method for manufacturing vacuum glass in vacuum heating furnace by using temperature and pressure control method

Abstract

The invention relates to a method for manufacturing vacuum glass in a vacuum heating furnace by using a temperature and pressure control method. Firstly sides are sealed by heating under normal pressure and controlled temperature of 380-500 DEG C, requirements are met by vacuum pumping after side sealing powder is cooled and solidified, bleeder hole sealing is carried out on high temperature inorganic glass powder on a 420-900 DEG C melting bleeder hole, sealing is all continuously completed in the same vacuum heating furnace independently, so that the whole process design is scientific. The method adopts side sealing under the normal pressure and rising temperature before the vacuum heating furnace is pumped to be vacuum, vacuum pumping is carried out at the temperature lower than the side sealing temperature after the side sealing powder to be carried out side sealing is cooled and solidified after the sides are sealed, after vacuum degree meets requirements, the heat resisting inorganic sealing powder is partially heated to more than 400 DEG C to melt, and the bleeder hole is sealed. The method can effectively guarantee edge sealing quality of the vacuum glass and the vacuum degree of the vacuum glass, avoids air leakage and moisture problems of the vacuum glass, and effectively improves quality level of the vacuum glass.

Description

technical field [0001] The invention belongs to the field of vacuum glass, in particular to a method for preparing vacuum glass in a vacuum heating furnace by using a temperature control and pressure control method. 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-a...

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 diameter of the suction pipe is small and the resistance is large, which seriously affects the quality of vacuuming.