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A method for vacuum flexible heating of curved glass

A curved glass, flexible technology, applied in the direction of ohmic resistance heating, heating element materials, ohmic resistance heating parts, etc., can solve the problem that the curved glass is difficult to achieve high-temperature coating, etc., to solve uneven heating, enhance accurate monitoring, and ensure quality Effect

Active Publication Date: 2020-12-29
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem that curved glass is difficult to achieve high-temperature coating, and propose a method for vacuum flexible heating of curved glass

Method used

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  • A method for vacuum flexible heating of curved glass

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Experimental program
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Effect test

Embodiment approach

[0014]1) A flexible heating film is used to stick to the back of the glass to achieve seamless bonding with the glass. The suitable heating temperature range for this method is about 50-180°C;

[0015]2) A detachable flexible heating jacket is fixed on the back of the glass to achieve a good fit with the glass. Since the resistance wire used in the detachable flexible heating is wrapped with high temperature resistant glass fiber, the suitable heating temperature range for this method is about 180-350°C.

[0016]The prerequisite for implementing the vacuum heating of the present invention is to connect an external thermostat through a vacuum flange to control the above-mentioned flexible heating film or a detachable flexible heating jacket to realize temperature control. The prerequisite for the precise temperature control of the present invention is to arrange several sensors on the heated substrate to obtain the accurate temperature of the substrate.

[0017]The implementation steps of the...

Embodiment

[0025]After the curved glass piece is installed in the vacuum chamber 1, the flexible heating film or flexible heating jacket 2 is evenly attached to the back of the substrate 3. At the same time, a number of temperature sensors 4 are arranged around the substrate 3; the flexible heating film or flexible heating jacket 2 is connected to the external temperature controller 6 through the vacuum flange 5; the vacuum chamber 1 is evacuated through the vacuum pump group 7 to reach the coating site The required degree of vacuum. Such asfigure 1The shown external temperature controller heats the tightly attached flexible heating film or flexible heating jacket 2, and the temperature control is realized by the temperature controller 6. When the temperature stabilizes at the set value of 100°C, test the temperature sensors 4 arranged around the substrate 3 and find that the temperature is 96.5°C, 102.5°C, 99.4°C, 97.7°C, 99.4°C, 101.3°C, 102.3°C, basically At the set temperature of ±3.5℃, th...

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Abstract

The invention belongs to the field of electrical heating, and particularly relates to a method for vacuum flexible heating of bent glass. By adopting the characteristic that various special-shaped glass can be attached to a flexible heating film or a flexible heating jacket to be subjected to curving heating, so that high-temperature coating on large bent glass can no longer be limited by shapes or sizes. Flexible heating has the advantages that the uniform and controllable heating can be realized, the problems in other heating methods that the heating is nonuniform and the temperature controlis inaccurate are solved, and the high-temperature coating quality is ensured. The method further has the following beneficial effect that the used device and method can be applied to other coating equipment such as electronic beam evaporation and thermal spraying, and can also be used for performing vacuum heat treatment on a film grown on a substrate in situ.

Description

Technical field[0001]The invention belongs to the field of electric heating, and specifically relates to a vacuum flexible heating method for curved glass.Background technique[0002]In industrial production, it is often necessary to coat curved glass. Large-scale magnetron sputtering coating equipment, thermal evaporation, electron beam evaporation and other coating equipment are commonly used coating equipment. Existing studies have shown that increasing the temperature of the substrate can effectively remove water vapor on the surface and improve the growth quality of the film. Generally, the substrate heating device of the coating equipment is integrated in the substrate table, which only has a heating effect on flat parts with a small area, but is not suitable for various special-shaped curved glass substrates used in the automotive and aerospace fields. When coating large curved glass, it is often necessary to heat the overall coating equipment, which consumes a lot of resources...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/00H05B3/34H05B3/02H05B3/14
CPCC03C17/001C03C2218/156H05B3/02H05B3/146H05B3/34
Inventor 郝常山彭晶晶霍钟祺钟艳莉张旋
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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