JP4429055B2 - Laminated glass manufacturing equipment - Google Patents

Description

  The present invention relates to a laminated glass manufacturing apparatus, and more particularly, to a laminated glass manufacturing apparatus that is excellent in productivity and suitable for manufacturing various types of laminated glass.

As a conventional laminated glass manufacturing apparatus, what is shown in FIG. 4 is generally known. This apparatus comprises two vacuum carriages 15 and 15 ′ and a heating chamber 24 having loading / unloading outlets 26 and 26 ′ on both sides of the vacuum carriage. In the space between the bank rubber 11, the glass structure 20 (FIG. 3) in which an adhesive film (ethylene / vinyl acetate copolymer EVA film) 22 is sandwiched between the two glass plates 21 and 23 is placed. The space is evacuated by a vacuum pump (not shown). In this state, the vacuum carriage 15 is sent into the heating chamber 24, and the glass structure is heated by the lamp heater 25 to a predetermined temperature (for example, 100 ° C or 135 ° C in the case of EVA film) for a predetermined time according to the type of the adhesive film. To do. Meanwhile, in the other vacuum carriage 15 ′, the glass component is attached. After a predetermined time has elapsed, the vacuum carriage 15 is pulled out of the heating chamber 24 and the other vacuum carriage 15 ′ is fed. Allow the glass construct to cool to below about 60 ° C., then break the vacuum and remove the laminated glass and attach a new glass construct.
By repeating the above, a small amount of laminated glass can be produced with a small and simple apparatus configuration.

  On the other hand, an example of a manufacturing apparatus suitable for mass production is shown in FIG. 5A and 5B are a schematic front view and a plan view of the apparatus, respectively. The apparatus 30 includes an exchange section 31, a spare section 32, a heating section 33, a cooling section 34, and an outlet section 35. A vacuum carriage 38 in which the glass structure 20 is placed between a stainless steel substrate and a rubber sheet is provided. The bonding process is performed by sequentially moving on rails laid in the section.

First, in the replacement section 31, the glass structure is attached between the stainless steel substrate on the vacuum carriage 38 and the rubber sheet. Then, it moves to the preliminary section 32, the switch of the vacuum pump 39 arranged on the vacuum carriage is turned on, the vacuum state is established between the stainless steel substrate and the rubber sheet, and the adhesive film is pressed between the two glass plates. The vacuum carriage moves to the heating section 33, the glass structure is heated to a predetermined temperature (eg 135 ° C.), and the EVA film melts. Thereafter, in the cooling section 34, the glass structure is cooled, the EVA film is solidified, and the two glass plates are firmly bonded. After cooling, the vacuum pump 39 is turned off and air is sent between the stainless steel substrate and the rubber sheet. The vacuum carriage is sent to the outlet section 35, lowered to the lower stage by the outlet lift 36 ′, and returned to the replacement section 31 by the lower conveyor chain 37. Here, it is lifted up by the inlet lift 36. Here, the laminated glass is taken out and a new glass structure is attached.
As described above, in the manufacturing stand of the configuration shown in FIG. 5, the laminated glass can be continuously produced and mass-produced by continuously circulating each section sequentially using a number of vacuum carriages. It was.
JP 2001-247342 A

However, in recent years, the demand for laminated glass has increased in many cases using different adhesive films having different characteristics depending on the application, that is, there is a tendency for the demand for various types to increase. It is necessary to stop and reset the temperature of the heating furnace, and there is a problem that the productivity becomes extremely low for such a variety of production.
In addition, the conventional manufacturing apparatus has a problem that the tact time of the cooling process is particularly large, which reduces productivity, or requires an extra space for the cooling process, thereby increasing the size of the apparatus. Further, conventionally, a radiation type heating means has been used, and there has been a problem that it is not easy to uniformly heat the entire glass structure.
As described above, conventional laminated glass manufacturing equipment has only a mass production apparatus of the same type of laminated glass or a very small amount of production equipment, and produces laminated glass of different adhesives. Was practically impossible.

  Under such circumstances, an object of the present invention is to provide a laminated glass manufacturing apparatus that is excellent in productivity and capable of producing a plurality of types of laminated glass in parallel while having a small and simple apparatus configuration. . It is another object of the present invention to provide a production apparatus capable of producing a laminated glass having a uniform and high adhesive strength over the entire glass surface and having excellent durability.

The laminated glass manufacturing apparatus of the present invention includes a sealed container having a fluid inlet and outlet and a rubber sheet that covers the top plate of the container, and is thermally melted in a space between the rubber sheet and the top plate. Alternatively, a vacuum heating table on which a glass structure composed of two pieces of glass sandwiching a thermosetting film is placed and the space can be evacuated, and the film is melted or thermoset. A heating fluid circulating device for controlling the heating of the fluid to a temperature of 1 and circulating the heating fluid between the container and a cooling fluid having a temperature lower than the first temperature between the container and the container. A cooling fluid circulation device that cools the glass structure, a switching valve that switches a fluid supplied to the container, and a vacuum pump that evacuates the space, and the glass structure with the space in a vacuum state. body The heated in a heating fluid, wherein the film is cooled by the cooling fluid after melting or curing, characterized in that to produce a laminated glass by bonding the two glass.
By heating the glass component through the top plate with a liquid controlled to be heated to a predetermined temperature, the temperature uniformity in the glass surface is improved compared to the heating method using a radiation heater such as a lamp. As a result, the uniformity of the adhesive strength is improved. Further, since a cooling method using a low-temperature liquid is adopted for cooling the glass, the cooling time can be shortened and the productivity is improved.

  In addition, the said top plate is good also as a curved-surface shape, In this case, the bending laminated glass which has a predetermined curvature can be manufactured.

The laminated glass manufacturing apparatus of the present invention includes a plurality of the vacuum heating tables, a storage shelf in which the plurality of vacuum heating tables can be stored and taken out, and an arbitrary vacuum heating table among the plurality of vacuum heating tables. And a second switching valve for supplying the heating fluid or the cooling fluid, and the laminated glass is manufactured in parallel on the plurality of vacuum heating tables.
The vacuum heating table method of the present invention, which has excellent adhesive strength uniformity and productivity, can be easily arranged in multiple stages without impairing these characteristics. Can be further greatly improved.

Furthermore, instead of the heating fluid circulating device, at least one vacuum heating table among the plurality of vacuum heating tables is heated to a second temperature and circulated between the container and the container. Two heating fluid circulation devices are connected so that laminated glass using different adhesive films can be manufactured in parallel.
This makes it possible to simultaneously and simultaneously manufacture laminated glass using adhesive films corresponding to the first and second temperatures, and it is possible to manufacture a wide variety of laminated glasses with high productivity.
In the present invention, an ethylene vinyl acetate copolymer film is preferably used as the film.

  By this invention, the heating uniformity in a glass surface improves, and the adhesive strength and durability as a whole laminated glass improve significantly. In addition, it is possible to realize a manufacturing device that can produce multiple types of laminated glass at the same time, and a manufacturing device that is highly productive and has a very high throughput per floor area while having a small and simple device configuration. Become.

  Hereinafter, the present invention will be described in more detail with reference to examples.

An example of the laminated glass manufacturing apparatus of this invention is shown in FIG.
As shown in FIG. 1, the laminated glass manufacturing apparatus of the present embodiment is a vacuum heating table 1 that heats the glass structure 20 shown in FIG. A heating fluid circulation device 2 that circulates between the heating table 1, a cooling fluid circulation device 3 that circulates a cooling fluid between the vacuum heating table 1, and a switching valve 4 between the heating fluid and the cooling fluid. , 4 ′ and a vacuum pump 5 for evacuating the mounting space of the glass structure.

  The vacuum heating table 1 is disposed so as to cover the container 6 having the fluid introduction port 7 and the discharge port 7 ′ and the glass structure 20 placed on the top plate 8, and is an exhaust for evacuating the inside. It consists of a rubber sheet 10 with a base 12 attached. A bank rubber 11 is disposed between the top plate 8 of the container and the rubber sheet 10 so as to surround the glass structural body 20 and the exhaust base 12 in order to facilitate internal vacuuming.

  Further, the heating fluid circulation device 2 includes a heater and a thermostat so that the temperature of the fluid is always maintained at a predetermined temperature. The temperature-controlled heating fluid circulates between the container 6 and a circulation pump (not shown), and heats the glass structure to a predetermined temperature via the top plate 8. On the other hand, unlike the heating fluid circulation device 2, the cooling fluid circulation device 3 does not require highly accurate temperature control. However, since the fluid temperature gradually rises, the fluid is cooled by water or other refrigerant. Is preferred.

  In addition, it is preferable that a plurality of fluid inlets 7 and outlets 7 ′ of the container are usually provided so that the fluid flows uniformly in the container. The fluid is distributed to the plurality of inlets and the fluids from the plurality of outlets are collected. Manifolds 9 and 9 'are provided to return to the circulation device. Here, it is preferable that the discharge side has a larger number and a smaller diameter than the introduction side. By setting it as such a structure, the heating uniformity of a glass structure body improves further. Moreover, it is preferable that the container 8 and piping are heat-insulated with a heat insulating material.

As a material for the top plate of the container, a metal having excellent thermal conductivity is used. For example, aluminum and copper are preferable, and particularly lightweight aluminum is preferable. In addition, the portion in contact with the glass may be coated with a resin having high heat resistance such as Teflon (registered trademark).
The fluid used is a liquid that is sufficiently stable at the melting or curing temperature of the adhesive film and does not corrode the container. If the adhesive film is an ethylene vinyl acetate copolymer, for example, spindle oil or quenching oil, etc. Are preferably used.

  In the present invention, the ethylene-vinyl acetate copolymer (EVA) film can be suitably used for both thermosetting and heat-melting properties. However, when a heat-melting film is used, it is not sufficiently cooled. If the vacuum state is broken, the adhesive strength is not sufficient, so there is a risk of peeling, and handling is necessary. Moreover, as a film thickness, the thing of about 0.1-0.5 mm is used suitably. As the rubber sheet, a silicon rubber having a high heat resistance and a thickness of 4 to 8 mm is preferably used.

Next, the manufacturing method of the laminated glass using the apparatus of FIG. 1 is demonstrated.
First, the inside of the container 6 is in a state where the cooling fluid is accumulated, and the temperature of the top plate is 60 ° C. or lower. In this state, the glass structure 20 shown in FIG. 3 is placed on the top plate 8 of the container. Subsequently, the bank rubber 11 is disposed so as to surround the glass constituent body, the whole is covered with the rubber sheet 10, and the end face is fixed with the fastener 13.
Subsequently, the vacuum pump and the exhaust cap 12 are connected by a vacuum hose 18, and the vacuum pump 5 is driven to exhaust the space surrounded by the top plate 8, the rubber sheet 10 and the bank rubber 11. Press the adhesive film with the glass 21,23.

Here, when the valves 4 and 4 ′ are switched and the heating fluid is supplied and circulated into the container, the heat of the fluid is transmitted to the adhesive film through the top plate, and the melting or curing of the film starts. After a predetermined time has elapsed and the film melting or curing reaction has been completed, the switching valves 4 and 4 'are switched again to introduce the cooling fluid into the container and circulate it.
After cooling to a predetermined temperature (for example, 60 ° C.), the vacuum is broken, the laminated glass is taken out, and the operation is finished.
As described above, since the apparatus of this example is configured to forcibly cool the glass structure including the adhesive film, the cooling process is greatly shortened, and the throughput is greatly improved as compared with the conventional method.

Next, FIG. 2 shows a multistage manufacturing apparatus that is highly productive and that can simultaneously manufacture various types of laminated glass.
As shown in FIG. 2, the storage chamber 14 of the vacuum heating table 1 is provided with a plurality of storage shelves 14 ′ (four levels in the example of FIG. 2), and the plurality of vacuum heating tables are placed on the carriage 15. Stored and removed. A first heating fluid circulation device 2, a second heating fluid circulation device, and a cooling fluid circulation device are disposed below the storage chamber 14, and each is connected to a container of each vacuum heating table via a switching valve. ing. A vacuum pump 5 is also arranged at the lower part of the storage chamber and connected to the exhaust cap of each vacuum heating table. In addition, fluid piping, hoses, and the like are housed in a cable bear (for example, a cable bear manufactured by Enomoto Kogyo Co., Ltd.) to facilitate storage and removal from a vacuum heating table storage shelf.

The state of FIG. 2 shows a state where the uppermost vacuum table is taken out and a new glass structure is mounted on the table. The vacuum table is taken out by moving the support block 16 movable to the right and left in the figure in the right direction, supporting the end of the carriage with a support base 17 having an L-shaped cross section, and retracting the support block 16 to the left. .
The support base 17 can be moved up and down, and is lowered when pulling out the lower vacuum heating table.

  Since the manufacturing apparatus of this example includes two types of heating fluids, it is possible to manufacture laminated glass using two types of adhesive films in parallel. For example, in the case of an EVA film, a laminated glass using an EVA film (for example, EVASAFE made by Bridgestone) having a melting point of 135 ° C. as the first heating fluid is produced in the upper two stages, and a melting point of 100 ° C. is obtained with the second heating fluid. Two types of laminated glass can be produced at the same time, for example, a laminated glass using an EVA film (for example, S-LEX-EN manufactured by Sekisui Chemical Co., Ltd.) can be produced in the lower two stages. Further, by arranging heating fluids of different temperatures, it is possible to produce more various types of laminated glass in parallel.

In addition, even when manufacturing a single type of laminated glass, the cooling time is greatly shortened, the same as the glass component replacement process and the heating process, the throughput is greatly improved, and the size is small and the productivity is excellent. Manufacturing equipment can be realized.
In the above, a four-stage storage chamber is used. However, the storage chamber may be further multi-staged, and the vacuum heating table may be stored and taken out not only from one side but also from both sides. In this way, a laminated glass manufacturing apparatus with extremely high throughput per floor area can be realized.
Further, in the present invention, glass materials such as flat glass and flat glass, flat glass and tempered glass, tempered glass and tempered glass, and a combination of flat glass and template glass can be freely combined.

  Furthermore, the present invention can produce not only flat laminated glass but also bent laminated glass having a predetermined curvature. In this case, what processed the top plate of the container into the desired curvature is used. Here, glass that has been bent in advance is used. For example, in the case of chemically tempered glass, it is also possible to simultaneously perform laminating and bending using flat glass.

It is a schematic diagram which shows the structural example of the laminated glass manufacturing apparatus of this invention. It is a schematic diagram which shows the other example of the laminated glass manufacturing apparatus of this invention. It is a schematic diagram which shows the structure of a glass structure. It is a schematic diagram which shows an example of the conventional laminated glass manufacturing apparatus. It is a schematic diagram which shows the other example of the conventional laminated glass manufacturing apparatus.

Explanation of symbols

1 vacuum heating table,
2, 2 'fluid circulation device for heating,
3 Cooling fluid circulation device,
4, 4 'switching valve,
5 Vacuum pump,
6 Airtight container,
7 Fluid inlet,
7 'Fluid outlet
8 Top plate,
9,9 'manifold,
10 Rubber sheet,
11 Bank rubber,
12 Exhaust cap,
13 Fasteners,
14 Vacuum heating table storage room,
14 'storage shelf,
15, 15 'dolly,
16 bogie support block,
17 Support base,
18 vacuum hose,
20 glass construction,
21, 23 glass,
22 adhesive film,
24 heating chamber,
25 lamp heater,
26, 26 'loading / unloading port,
30 Laminated glass manufacturing equipment for mass production,
31 Exchange section,
32 spare section,
33 Heating section,
34 Cooling section,
35 exit section,
36 Entrance lift,
36 'exit lift,
37 Conveyor chain,
38 Vacuum truck,
39 Vacuum pump.

Claims (5)

In each of two opposing faces a plurality of liquid inlet and outlet, rubber the liquid outlet to cover the top plate of the sealed container and container with a reduced number and caliber number of units than that of the liquid inlet and a sheet, the space between the rubber sheet and the top plate, by placing the glass structure consisting of two glass sandwiching a hot-melt or thermally cured film, and to a vacuum the space A vacuum heating table with a configuration capable of
A circulating device for heating liquid that circulates a liquid controlled to a first temperature at which the film is thermally melted or thermoset with the container;
A cooling liquid circulating device for circulating a liquid controlled to a temperature lower than the first temperature between the container and the container;
A switching valve for switching between the heating liquid and the cooling liquid supplied to the container;
A vacuum pump for evacuating the space,
The space is heated by the heating fluid to the glass structure as vacuum, after which the film is melted or cured, said cooled with a cooling fluid, to produce a laminated glass by bonding the two glass The laminated glass manufacturing apparatus characterized by the above-mentioned.   The laminated glass manufacturing apparatus according to claim 1, wherein the top plate has a curved shape, and a bent laminated glass having the curved shape is manufactured. A plurality of vacuum heating tables; a plurality of storage shelves capable of storing and taking out the plurality of vacuum heating tables;
A second switching valve for supplying the heating liquid or the cooling liquid to an arbitrary vacuum heating table among the plurality of vacuum heating tables;
The laminated glass manufacturing apparatus according to claim 1 or 2, wherein the plurality of vacuum heating tables are configured to manufacture laminated glass in parallel. Among the plurality of vacuum heating table, for at least one vacuum heating table, instead of the circulating device of the heating fluid body, the circulating between the liquid and the second temperature to the heating control to said container circulation device 2 of the heating liquid body linked, glass manufacturing system tailored according to claim 3, characterized in that a parallel can be produced constituting the laminated glass using different adhesive film. The laminated glass manufacturing apparatus according to any one of claims 1 to 4, wherein the film is an ethylene vinyl acetate copolymer film.

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