Method for manufacturing safe toughened vacuum glass

Abstract

The invention relates to a method for manufacturing safe toughened vacuum glassm comprising the following steps of: (1) placing two ultrahigh-stress glass plates each provided with an air exhaust slot and having a stress value of 100-200 MPa on a platform, and cutting the glass plates to form the air exhaust slots; (2) arranging a support on the lower glass plate, placing a getter thereon, and arranging exhaust tubes in the air exhaust slots; (3) applying glass powder to the edges of the four sides of the lower glass plate, wherein the applied glass powder is less than 2 cm away from the edges; and putting the upper glass plate on the lower glass plate for combination; (4) delivering the combined two glass plates into a furnace, heating the glass plate to a range of 380 to 485 DEG C, and preserving heat for 25-35 minutes; and (5) performing vacuum supply when the temperature in the furnace ranges from 280 to 320 DEG C; and performing hot melting sealing when the value of negative pressure in the cavity of the glass reaches 10-1 to 10-2 Pa, thereby obtaining the toughened vacuum glass with the stress value of 85-95 MPa. The method is scientific in design and simple in process, and perfectly overcomes the problems difficult to be solved in the prior art and greatly expands the application fields of the vacuum glass; therefore, the method is a revolutionary technological innovation and must cause deep influence on the development of the vacuum glass.

Description

technical field [0001] The invention belongs to the field of vacuum glass, in particular to a method for manufacturing safe tempered vacuum glass. Background technique [0002] Tempered vacuum glass that meets national safety standards has always been a dream come true for people, but so far no product has come out. The main reason is that 100% of the flat tempered glass circulating in the market must meet safety standards, that is, tempered glass with a stress of 60-95Mpa. When using this stress value glass to manufacture vacuum glass at a high temperature above 450 ° C, the original sheet will be annealed and lose about 20-50% of the surface stress value, and the tempered glass will no longer be tempered glass. [0003] So far, there are three domestic and foreign research directions for the manufacture of vacuum glass from tempered glass: 1. Local heat preservation method, but it is difficult to control the gradient balance between edge stress and middle part stress; 2. U...

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Problems solved by technology

[0005] Through the search, no published patent documents related to the application of the present invention were found