High-pressure high-temperature edge sealing method for vacuum glass
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A high-pressure high-temperature, vacuum glass technology, used in glass forming, glass re-forming, glass manufacturing equipment and other directions, can solve the problems of low melting point glass powder leveling and poor adhesion, achieve good quality and improve sealing quality, the effect of increasing the leveling
Active Publication Date: 2013-06-12
TIANJIN GUSHANG VACUUM GLASS MFG
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Problems solved by technology
Because the low-melting-point glass powder is naturally leveled under equal pressure and sealed after contacting the upper and lower sheets of glass to solidify, the leveling and adhesion of the low-melting-point glass powder for edge sealing are not good after melting, resulting in large defects in the quality of edge sealing , the air leakage rate after edge sealing is not less than 15%
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Embodiment 1
[0018] A high-pressure and high-temperature edge sealing method for vacuum glass, the steps are:
[0019] ⑴Coat a circle of closed low-melting point glass powder around the edge of the lower piece of ordinary glass with supports, combine the upper piece of ordinary glass with the lower piece of ordinary glass, reserve the glass exhaust pipe, and the exhaust pipe can be made into a blind head pipe or open type exhaust pipe and welded on the common glass surface or side end surface;
[0020] ⑵Put the combined ordinary glass into a high-pressure and high-temperature heating kettle. The high-pressure and high-temperature heating kettle is a box type or a tunnel kiln type. The combined ordinary glass in the high-pressure and high-temperature heating kettle can be placed vertically or flat. on the bracket;
[0021] (3) Heat the temperature in the high-pressure and high-temperature heating kettle to the melting point of glass powder at 460°C, then use an air compressor to pressurize...
Embodiment 2
[0023] A high-pressure, high-temperature edge sealing method for tempered vacuum glass, the steps of which are:
[0024] ⑴Coat a circle of closed low-melting point glass powder around the edge of the lower piece of tempered glass with supports, combine the upper piece of tempered glass with toughened ordinary glass, reserve a glass exhaust pipe, and the exhaust pipe can be made into a blind pipe Or open exhaust pipe and welded on the tempered glass surface or side end surface;
[0025] ⑵Put the combined tempered glass into a vacuum high-pressure, high-temperature heating kettle. The vacuum, high-pressure, high-temperature heating kettle is box type or tunnel kiln type. The combined toughened glass in the vacuum high-pressure, high-temperature heating kettle can be placed vertically or lay flat on the bracket;
[0026] (3) Heat the temperature in the vacuum, high-pressure, and high-temperature heating kettle to the melting point of glass powder at 360°C, then use an air compre...
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Abstract
The invention relates to a high-pressure high-temperature edge sealing method for vacuum glass. The high-pressure high-temperature edge sealing method for the vacuum glass comprise the steps of (1) of coating one circle of closed low-melting-point glass powder onto the edge periphery of a lower glass piece with a support object, and combining an upper glass piece with the lower glass piece; (2) putting the combined glass into a high-pressure high-temperature heating pot in a manner of vertically arranging the glass or flatly putting the glass on a bracket; and (3) increasing the temperature in the high-pressure high-temperature heating pot to the melting point of the glass powder 350 DEG C to 480 DEG C, increasing the pressure 0.1MPa to 5MPa into the pot by an air compressor, keeping the temperature and the pressure for 0.2 hour to 2 hours, and decreasing the pressure and the temperature to obtain a vacuum glass finished product. With the adoption of the high-pressure high-temperature edge sealing method for the vacuum glass, the low-melting-point glass powder is put between the edges of the two glass pieces; the temperature is increased to 350 DEG C to 480 DEG C under the normal pressure in the high-pressure pot; after the low-melting-point glass powder is molten, the pressure increase is performed, so that the two glass pieces are extruded in a vacuum way; therefore, the molten low-melting-point glass powder contacts with the upper glass piece and the lower glass piece fully and closely; the heat conduction speed and the heat conduction amount are increased; the adhesion force and the leveling performance of the molten powder are enhanced; the sealing quality of edges sealed with the low-melting-point glass powder is improved; and the technical difficulty of air leakage after the edge sealing is effectively solved.
Description
technical field [0001] The invention belongs to the field of vacuum glass and relates to edge sealing of vacuum glass, in particular to a high-pressure and high-temperature edge sealing method of vacuum glass. Background technique [0002] Generally, the manufacture of vacuum glass is under normal pressure (that is, the pressure in the container is lower than 0.1mpa, and the vacuum degree is lower than 0.02mpa), or under high vacuum and equal pressure, the glass edge is sealed by melting low melting point glass powder at high temperature. Because the low-melting-point glass powder is naturally leveled under equal pressure and sealed after contacting the upper and lower sheets of glass to solidify, the leveling and adhesion of the low-melting-point glass powder for edge sealing are not good after melting, resulting in large defects in the quality of edge sealing , the air leakage rate after edge sealing is not less than 15%. Contents of the invention [0003] The purpose o...
Claims
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Application Information
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