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Glass welding method and composite glass device
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A technology for glass fusion and glass parts, applied in glass forming, glass re-forming, glass manufacturing equipment and other directions, can solve problems such as difficulty in ensuring the uniformity of coating flux, unwelded, affecting product appearance, etc.
Active Publication Date: 2021-07-13
WEIDALI IND CHIBI CO LTD
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Problems solved by technology
However, the addition of flux has high requirements on equipment technology, it is difficult to ensure the uniformity of coating flux, and it is very easy to affect the appearance of the product
Not only that, compared with the integrated glass itself, the combined glass parts after flux welding are not strong enough at the joint
The bigger problem is that there is a difference in the coefficient of thermal expansion between the flux and the glass, which seriously restricts the overall thermal stability of the composite glass after welding and has a significant impact on the function of the product
Direct contact heating and welding of glass products often requires heating the glass above the softening temperature to make it have a certain fluidity before processing, but softening will affect the shape of the glass itself, and it is often difficult to remove the bubbles in the contact part after welding, or because of welding The fit is not tight enough, resulting in partial unwelded
Method used
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Embodiment 1
[0044] 1) After cleaning the two pre-processed and shaped flat glasses, heat and bond them under vacuum conditions. The temperature of the glass parts during the bonding process is 70°C, and then place them in the defoaming machine for defoaming. The temperature inside the defoaming machine is 65 ℃, the air pressure is 0.6MPa, and the time is 50min;
[0045] 2) Place the glass group after defoaming treatment on the support, heat the interface to be welded, control the temperature of the part to be welded to 650°C, and weld the time to 2 hours;
[0046] 3) The welded glass group is placed in a resistance furnace, and annealed at a temperature of 900° C. for 2 hours.
Embodiment 2
[0048] 1) After cleaning the two pre-formed flat glasses, they are heated and bonded under vacuum conditions. The temperature of the glass parts during the bonding process is 85°C, and then placed in the defoaming machine for defoaming. The temperature inside the defoaming machine is 55 ℃, the air pressure is 0.8MPa, and the time is 40min;
[0049] 2) Place the glass group after defoaming treatment on the support, heat the interface to be welded, control the temperature of the to-be-welded part to 700°C, and weld the time to 1.5h;
[0050] 3) The welded glass group is placed in a resistance furnace, and annealed at a temperature of 800° C. for 2 hours.
Embodiment 3
[0052] 1) After cleaning the two pre-processed and shaped flat glasses, heat and bond them under air conditions. The temperature of the glass parts during the bonding process is 100°C, and then place them in the defoaming machine for defoaming. The temperature inside the defoaming machine is 50 ℃, the air pressure is 1MPa, and the time is 30min;
[0053] 2) Place the glass group after defoaming treatment on the support, heat the interface to be welded, control the temperature of the part to be welded to 750°C, and weld the time to 1h;
[0054] 3) The welded glass group is placed in a resistance furnace, and annealed at a temperature of 700° C. for 2 hours.
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Abstract
The invention relates to the technical field of glass, in particular to a glass welding method and a composite glass product. The glass welding method disclosed by the invention comprises the following steps: heating and laminating surfaces to be welded between at least two glass pieces to obtain a hot laminated glass group; heating and welding the to-be-welded surface of the hot laminated glass group; and carrying out annealing treatment on the fused glass group. According to the method, a bubble-free tightly-bonded glass group is realized through simple thermal bonding treatment, atoms on the to-be-welded surface of the glass are re-bonded through heating, and the welding of a glass body can be realized without adding any flux. The glass product welded according to the method has the advantages of high joint strength and no bubble defect.
Description
technical field [0001] The invention relates to the technical field of glass, in particular to a glass welding method and a composite glass device. Background technique [0002] Glass has become one of the most widely used materials in human production and life due to its excellent light transmission, high hardness, and low manufacturing cost. With the development of the times, people's demand for multi-layer glass structure products with more exquisite appearance is also increasing day by day. [0003] Traditional welding technology usually requires the use of low-melting point glass powder and other fluxes, which can be softened at relatively low temperatures and act like glue to join the two glass surfaces to be joined together. However, the addition of flux has high requirements on equipment technology, it is difficult to ensure the uniformity of coating flux, and it is very easy to affect the appearance of the product. Not only that, compared with the integrated glass...
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Application Information
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