JPH0264044A - Production of safety glass - Google Patents

Abstract

PURPOSE:To efficiently obtain safety glass of plural sheets at a time by piling plural pairs of laminated glass having an intermediate adhesive film between the layers through facial heaters, covering the piled materials with an evacuating film and heating the piled materials by a heater while reducing pressure in the film. CONSTITUTION:An adhesive 2 sandwiched in between two sheets of plate glass 1 and 1 is used as a pair and plural pairs of the laminated glass are piled through facial heaters 3. Then the piled materials 4 are placed on an evacuating stand 5, covered with a film 6 for pressure reduction and frames 7 to enclose the piled materials 4 are detachably attached to the periphery of the film 6 for pressure reduction. The piled materials 4 are heated by the facial heaters 3 and the interior of the film is evacuated (vacuum pipe 9) through a pressure reducing vent 8 formed between the piled materials 4 on the evacuating stand 5 and the frames 7.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for manufacturing laminated glass in which two glass plates are fused together by interposing an adhesive film between the two glass plates and heating under reduced pressure.

[Conventional technology]

Conventionally, as shown in FIG. 4, two glass plates 1 are placed on a decompression table 5 with an adhesive film 2 interposed therebetween, covered with a decompression film 6, and then inserted through the decompression port 8 of the decompression table 5. Under reduced pressure, the surface heater 3 installed above the vacuum table 5 heats the adhesive film 2 to melt the two glass plates 1.
lath A is manufactured by fusing and joining together.

[Problem to be solved by the invention]

Conventionally, heating is performed by a surface heater 3 installed above the decompression table 5, so that only one set of two glass plates 1 with an adhesive film 2 interposed therebetween can be placed on the decompression table 5. , productivity was extremely low. The present invention has been made in view of the above circumstances, and its purpose is to efficiently manufacture a plurality of laminated glasses at once.

[Means to solve the problem]

In the method for manufacturing laminated glass of the present invention, two large plates 1
A plurality of sets with adhesive film 2 sandwiched between them are stacked together via a surface heater 3, and this stacked body 4 is placed on a decompression table 5, and the stacked body 5 is covered with a decompression film 6. A frame body 7 surrounding the body 5 by stacking the periphery of the film 6
After that, the stacked body 5 is attached to the surface heater 3.
The stacked body 5 and frame body 7 of the decompression table 5 are heated by
This feature is characterized in that the pressure is reduced through a pressure reduction port 8 formed between the two, and this structure solves the above problem. [To work, multiple sets of stacked bodies 4, each consisting of two sheets of glass with adhesive film 2 sandwiched between them, are placed on a decompression table 5 and heated while being depressurized. Lath board 1 can be manufactured by lath board A.
Since multiple sets are stacked together via the surface heater 3, with the adhesive film 2 sandwiched between them, uniform heating is obtained and there is no variation in the quality of the laminated glass A. The peripheral edge of the decompression film 6 is removably attached to the frame 7 surrounding the stacked body 5, and the decompression port 8 is formed between the stacked body 5 and the frame 7 of the decompression table 5. Installation and removal are easy, and moreover, the attachment of the decompression film 6 can be efficiently manufactured without foreign substances entering the decompression port 8 and clogging the decompression port 8 when the film 6 is removed. [Example 1] First, an adhesive film 2 is sandwiched between two glass plates 1. As the adhesive film 2, a resin film, an embossed film, or an opaque film such as a patterned film, a polyester film, or an acetate film interposed between these two films may be used. Can be done. Next, a plurality of pairs of the two glass plates 1 with the adhesive film 2 interposed therebetween are arranged on the decompression table 5 with the surface heater 3 interposed therebetween. After this, the stacked body 5 is covered with a film 6 for reducing pressure. The periphery of this depressurizing film 6 is sandwiched between upper and lower frames 7 surrounding the stacked body 5 and is detachably attached. A pressure reduction port 8 is formed between the stacked body 5 of the pressure reduction table 5 and the frame 7, and a vacuum pipe 9 of a vacuum pump is connected to the pressure reduction port 8.
is connected. Then, while driving the vacuum pump to reduce the pressure,
The adhesive film 2 is heated by a heating element 3 to melt the adhesive film 2 and fuse the two glass plates 1 together. After this, return to normal pressure, peel off the decompression film 6, and put together multiple sheets at once.
Manufacture. [Effects of the Invention] In the present invention, multiple sets of stacked bodies, each consisting of two glass plates with an adhesive film sandwiched between them, are placed on a vacuum table and heated while reducing the pressure. It is possible to manufacture multiple sheets of laminated glass in a single process, and since multiple sets are stacked together using a surface heater, with adhesive film sandwiched between two glass plates, uniform heating can be achieved. The periphery of the decompression film is removably attached to the frame surrounding the stacked body, and a decompression port is formed between the stacked body and the frame of the decompression table. Because the film is made of laminated glass, it is easy to attach and remove the film for decompression, and when removing the film, there is no possibility of foreign objects entering the decompression port and blocking it. can be manufactured efficiently.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view of a device used in an embodiment of the present invention, Fig. 2 is a perspective view of the surface heater in the above, Fig. 3 is a cross-sectional view showing a laminated glass manufactured by the above, @Fig. is a schematic cross-sectional view of a device for use in a conventional example,
A is laminated glass, 1 is glass plate, 2 is adhesive film,
3 is a surface heater, 4 is a stacked body, 5 is a pressure reduction table, 6 is a film for pressure reduction, 7 is a frame, and 8 is a pressure reduction port. Agent Patent Attorney Ishi 1) Ai Shichini

Claims (1)

[Claims] (1) A set of two glass plates with an adhesive film sandwiched between them is stacked together via a surface heater, the stacked body is placed on a decompression table, and the stacked body is covered with a decompression film, The periphery of the decompression film is removably attached to the frame surrounding the stacked body, and then the stacked body is heated by a surface heater and the pressure is reduced through the decompression port formed between the stacked body and the frame of the decompression table. A method for manufacturing laminated glass characterized by: