Sandwich glass hot-pressing method and device

Abstract

The invention relates to a sandwich glass hot-pressing method and device. The sandwich glass hot-pressing method comprises the following steps of placing laminated multiple-layer glass onto a conveying device; conveying the multiple-layer glass to a rough vacuum chamber, communicating the rough vacuum chamber with a vacuum transitional chamber, vacuumizing the laminated multiple-layer glass to 100-1000 Pa, and maintaining the pressure for 3-5 minutes; conveying the laminated multiple-layer glass to the vacuum transitional chamber, disconnecting the rough vacuum transitional chamber from the vacuum transitional chamber, communicating the vacuum transitional chamber with the high vacuum chamber, vacuumizing the laminated multiple-layer glass to 70-200 Pa, and maintaining the pressure for 3-5minutes; conveying the laminated multiple-layer glass to the high vacuum chamber, disconnecting the vacuum transitional chamber from the high vacuum chamber, communicating the high vacuum chamber with a vacuum heating chamber, vacuumizing the laminated multiple-layer glass to 30-50 Pa, and keeping the pressure for 3-5 minutes. The sandwich glass hot-pressing method can achieve vacuumizing of themultiple-layer glass to a high vacuum state through a step-by-step mode, and meanwhile after vacuumizing is completed, achieve heating of the multiple-layer glass to avoid the possibility of bubbles and layering of the multiple-layer glass during subsequent application.

Description

technical field [0001] The invention relates to a hot-pressing device, in particular to a laminated glass hot-pressing method and a hot-pressing device. Background technique [0002] Laminated glass is composed of two or more pieces of glass with one or more layers of organic polymer intermediate film sandwiched between them. After high-temperature pre-pressing (or vacuuming) and high-temperature and high-pressure processing, the glass and the intermediate film are permanently bonded. An integrated composite glass product. [0003] In the production process of laminated glass, when the interlayer film is sandwiched between transparent materials, there will be air between the transparent material and the interlayer. In order to make the final composite glass product free of air bubbles, the air needs to be discharged. [0004] The method of exhausting air usually adopted in the prior art is to roll the glass with a roller in a heated chamber to exhaust the air, or put the gl...

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Problems solved by technology

[0004] The method of exhausting air usually adopted in the prior art is to roll the glass with a roller in a heated chamber to exhaust the air, or put the glass in a vacuum bag and extract the air with a vacuum pump, but the above two methods are both Only 95-98% of the air can be extracted, and the remaining air will be absorbed by the middle layer. Although there are no bubbles in the glass from the appearance of the glass, during the use of the glass, it is affected by the environment (solar radiation, high and low temperature, etc.) ) and the aging of the interlayer, over time, this air will be released, forming bubbles or delamination, which will eventually lead to glass failure

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