JPS6362465B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a double-glazed glass in which the entire periphery of a plurality of glass plates at intervals is hermetically sealed and bonded with a thermosetting sealant, and the internal space is filled with a predetermined gas. Relating to a method of manufacturing.

Conventionally, when manufacturing such double-glazed glass, after assembling the double-glazed glass and applying a sealant around the entire periphery, it is transported into a heating furnace and left in the furnace for a long time to heat and harden the sealant. After that, it is taken out of the furnace, small holes are made at two places on the side that communicate with the internal space, and a predetermined gas, such as dry air, is fed under pressure through one hole, and the air in the internal space is discharged through the other hole for replacement. After that, the small holes are hermetically sealed with a sealant.

In the conventional method described above, when a gas other than air, such as argon gas or sulfur hexafluoride gas, is used as the internal filling gas, the replacement efficiency is poor, and therefore it is difficult to obtain the desired sound and insulation performance, and the manufacturing process becomes complicated. In addition, there is a problem in that it takes a lot of time to replace the gas and heat-cure the sealant.

The present invention solves the above-mentioned conventional problems and provides a method for manufacturing double-glazed glass that has a high gas replacement rate and has excellent production efficiency.

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is a sectional view showing an example of double-glazed glass manufactured by the method of the present invention, in which two glass plates 2
A hollow spacer frame 4 having ventilation slits 4A on the inner circumferential surface and containing a desiccant 3 inside is arranged in the peripheral area between A and 2B. A first airtight sealing layer such as butyl rubber 5 is used to seal the space between the spacer frame 4 and the inner surface, and a thermosetting sealant 6 such as polysulfide sealant or silicone sealant is filled around the entire outer circumference of the spacer frame 4. The glass plates 2A, 2B and the spacer frame 4 are integrally joined and hermetically sealed. The internal space 7 is filled with one or more gases having excellent heat insulation and soundproofing properties, such as sulfur hexafluoride gas, argon gas, and freon gas.

In manufacturing the double-glazed glass 1 having the above structure, the present invention first assembles the above structure (however, the interior space 7 is air) in a normal working space.

A small hole 9 for gas replacement passing through the spacer frame 4 and the sealant 6 and communicating with the internal space 7 is provided at one location.

Next, with the sealant 6 uncured, double-glazed glass 1
is carried into the decompression chamber 10.

In this carrying-in, a large number of double-glazed glasses 1 are placed on a cart 11 in a vertical or horizontal position, and the cart is loaded together with the cart.

A radiation type heating device 12 is installed in the decompression chamber 10, and a vacuum exhaust device 15 is connected to the decompression chamber 10 via an exhaust pipe 13 and a flow path switching valve 14.
and a gas cylinder 16 are connected.

First, the switching valve 14 is set to the exhaust device 15 side to reduce the pressure inside the decompression chamber 10, and then the switching valve 14 is switched to the gas cylinder 16 side to introduce a predetermined filling gas into the decompression chamber 10. The internal space 7 is filled with the above gas.

On the other hand, the double-glazed glass 1 is heated to a predetermined temperature by the heating device 12 to harden the sealant 6 through the above-mentioned evacuation process and replacement gas filling process.

When the gas replacement and the curing of the sealant 6 are completed, the double-glazed glass 1 is taken out of the decompression chamber 10 and the hole 9 is sealed with the sealant.

According to the method described above, since the pressure inside the double-glazed glass is reduced and a predetermined gas is introduced, the replacement efficiency is very high, and therefore a double-glazed glass with excellent heat and sound insulation performance can be obtained. Furthermore, since the gas replacement process and the heat curing process of the airtight sealant are performed simultaneously, the overall processing time can be significantly shortened.

Furthermore, since the internal gas is always filled at a constant temperature through the heating described above, variations in the expansion and contraction behavior of the internal gas caused by environmental temperature changes during the assembly process can be suppressed to a minimum. Therefore, it is possible to manufacture products with stable quality and high reliability.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an example of double-glazed glass manufactured by the present invention, and FIG. 2 is a cross-sectional view showing an example of an apparatus for carrying out the present invention. 1...double glass, 2A, 2B... glass plate,
4...Spacer frame, 6...Sealant, 9...
Gas displacement hole, 10...decompression chamber, 12...heating device, 15...exhaust device.

Claims (1)

[Claims] 1. In a method for manufacturing double-glazed glass in which the entire periphery of a plurality of spaced glass plates is hermetically sealed and engaged with a thermosetting sealant and the internal space is filled with a predetermined gas, after assembly, After the sealant is in an uncured state and a small hole communicating with the interior space is provided, it is carried into a decompression chamber equipped with a heating device, and after the chamber is depressurized, the predetermined gas is introduced into this chamber to form double-glazed glass. A method for manufacturing double-glazed glass, characterized by replacing air in an internal space with a predetermined gas and simultaneously heating and curing a sealant.