DE3402323A1 - Process for producing an insulating glazing consisting of at least two panes - Google Patents

Abstract

The invention relates to a process for producing an insulating glazing consisting of at least two panes, in which the panes are washed, brought into their final position with respect to one another by interposing a surrounding spacer covered with a sealing material and in which the assembly is pressed with the application of pressure, the arrangement is introduced into a chamber and there the pane interspace is filled with a special gas and then the insulating glazing thus formed is sealed with an adhesive. To achieve reliable filling, at least one filling hole (37) is provided in the spacer and the assembly (24) thus formed is first evacuated either before or after the sealing after pressing in a vacuum chamber (21) and then flooded with the special gas. Subsequently the filling hole (37) is sealed and the insulating glazing or the region thereof around the filling hole (37) is sealed. Alternatively, before pressing, the assembly is evacuated in the vacuum chamber (21), feeding a gap between a pane (2) and the spacer, and subsequently flooded with the special gas. Subsequently the pressing and sealing are carried out. A polyisobutylene is used as sealant or a thio-elastomer as adhesive. <IMAGE>

Description

Method of making one of at least two

Panes of existing insulating glass The invention relates to a method for producing an insulating glass consisting of at least two panes, which is described in DE-OS 31 15 566.

In the known method, the discs and the spacer compiled in a compression chamber of a press filled with a special gas and pressed. It is a significant advantage of this known method that the The space between the panes is formed within the compression chamber filled with the special gas and is therefore automatically filled with the special gas.

To ensure that the space between the panes is filled, the discs are introduced separately into the pressing chamber and only brought together in the pressing chamber will. Even with careful handling, there is an uncertainty with regard to this on a sufficient filling of the space between the panes with special gas, because with Introducing and removing the disc assembly into the press chamber air into the Pressing chamber penetrates, which are removed from the pressing chamber by a gas purging got to.

As a sealant in DE-OS 31 15 566 only for example butyl mentioned.

The invention is based on the object specified at the outset To train the method so that a safe filling despite simple equipment of the pane in between and a high-quality insulating glass also in the On-line operation is possible.

This task is indicated by the identifier of one of the Expectations 1 to 3 solved.

In the method according to the invention according to claim 1, with regard to a material has been selected for the sealant and a polyisobutylene is used, which is known under the name butyl and is also referred to as that in the following. This Sealant is particularly suitable for counteracting diffusion of the special gas. Butyl has for argon as well as for sulfur hexafloride, which in the following with SF6 is called the lowest diffusion rate. Since the special gas the aforementioned Contains gases either individually or as a mixture, is fed to an insulating glass Requirement taken into account that the gas filling during the service life the pane in the space between the panes is retained at least with the concentration, that sufficient sound and / or thermal insulation is guaranteed. It exists the requirement that the special gas loss from the space between the panes with unloaded Disc should not be larger than 0.5 volume% per year.

In addition, butyl has the property of a certain adhesive effect, so that the circumferential distance # age through the intermediate layer of the butyl-covered Slices brought into their final position to one another form a preliminary product, that adheres to one another with such strength that when the Pre-product from the pressing station to the vacuum chamber and from there to the sealing station the cohesion of the preliminary product is guaranteed. This also applies to a production in on-line operation. After pressing, the assembly is placed in a vacuum chamber guided. When the vacuum chamber is evacuated, it will be due to its presence at least one filling hole in the spacer at the same time as the space between the panes evacuated. When the vacuum chamber is flooded Likewise at the same time the space between the panes is also filled with the special gas. This method is characterized by simplicity and filling reliability, because when flooding the The space between the panes is filled in a vacuum chamber with the special gas inevitable, whereby uncertainties are excluded.

With an evacuation of about 50 mb, a degree of filling of about 95% is guaranteed. In contrast to the known method, the inventive Methods achieve the sealing of the vacuum chamber by simple means.

After the space between the panes has been filled, the filling hole is closed and then the insulating glass is sealed, giving it its final strength and strength Preserves tightness.

The inventive method according to claim 2 differs of which according to claim 1 essentially in that the pressing of the arrangement takes place after the space between the panes has been filled with special gas. This method has the advantage over the method according to claim 1 that no special filling hole it is to be provided between the panes that it is closed by a special means must become. According to the invention, there is a hold between at least one pane and the spacing he or the sealant leave a gap that is at least on one part the scope extends. This gap allows the space between the panes in the vacuum chamber evacuated and then flooded with Spezialgias. For safe filling A small gap, for example 1 to 3, is sufficient in the space between the panes mm. A small gap has the advantage over a larger gap that on the Path between the gas filling station and the pressing station tur little gas escapes from the space between the panes.

This special gas loss can thereby be kept within reasonable limits that the assembly immediately after opening and exiting the vacuum chamber is pressed. There is another possibility of avoiding the loss of special gas in pressing the panes together after flooding or after opening the vacuum chamber, so that the gap is closed.

The compression does not necessarily need to be pressed together at the same time to be, this can be done at the special press station.

As far as further advantages of the process claim 2 are concerned, which are common to the advantages of claim 1 is referred to the description referred to claim 1.

A prescribed gap between at least one disc and the Spacer can be produced in an advantageous manner that the spacer attached to a disc with the help of the sealant.

and the other disc in one opposite the first disc inclined position against the spacer is placed or leaned. A pretty great stability of this arrangement results when the last-mentioned disk in the lower area at a distance from the spacer # holder and in the upper area rests against the spacer or leans against it.

This stability results from the fact that the discs due to their Its own weight and the resulting static friction on the pane support too in the event of vibrations to be expected in a manufacturing plant in their position stay and keep the distance between them, so that in the filling station Filling is guaranteed.

The method according to claim 3 differs from that according to claim 1 in that the insulating glass is sealed before the space between the panes is filled and therefore before and before the space between the panes is filled the closing of the filling hole is of greater strength, so that it is less Caution can be handled or transported and also the filling hole with less Caution can be locked as far as forces occurring during locking are concerned are. With regard to the sealing, an adhesive is required for the pane composite not only gives strength, but also the diffusion of the special gas at the same time counteracts. A thio-elastomer, for example a 2-component sealant on the basis Polysulphide rubber (commercial name Thiokol) is particularly suitable Well. While in the method according to claim 1, the filling hole closure in the course of sealing is also sealed at the same time, requires the Füllochverschluß in the method according to claim 3 special attention with regard to tightness and, if necessary, a special sealing.

As far as the common advantages of the claim with the claims 1 and 2 3 are concerned, reference is made to the description of claims 1 and 2.

It is true that with insulating glass, the edges of the panes are bent and welded together for the purpose of sealing, attempts have been made to the To fill the space between the panes in a vacuum chamber with a special gas. The professional world was, however, of the opinion that in an insulating glass of the type described above Evekuierung has adverse effects, since an adverse change in the Sealing material or adhesive was expected, which increases the strength and the Leak tightness and thus the service life of the insulating glass would be significantly impaired.

Surprisingly, it has now been found that a polyisobutylene is used as a sealant or thio-elastomers as an adhesive, at least for evacuation and flooding required time is not adversely changed.

Further advantageous refinements of the invention are set out in the subclaims contain.

The invention is described below with the aid of a simplified drawing described in more detail.

1 shows a partial section through an insulating glass; Fig. 2 a Production line in a schematic representation for insulating glass as a first embodiment; 3 shows a vacuum chamber for filling the space between the panes with special gas; 4 shows a production line in a schematic representation as a second exemplary embodiment; 5 shows one of two disks and a spacer located between them formed arrangement; Fig. B shows a production line in a schematic representation as third embodiment.

The insulating glass, generally designated 1 in FIG. 1, consists of two disks 2, which are spaced apart from one another by a so-called spacer 3 are. The spacer 3 runs circumferentially in the vicinity of the edge of the pane and thus forms a frame which supports the disks 2 over the entire circumference. Of the The structure of the spacer 3 is generally known and therefore does not require any further details Description.

The spacer 3 is on both sides facing the panes 2 covered with polyisobutylene as a sealant 4. The space between the panes 5 is with filled with a special gas that is used for thermal insulation and / or noise insulation. That Filling of the space between the panes 5 can be carried out in a manner to be described below a filling hole 8 shown in broken lines take place.

It is the purpose of the polyisobutylene to counteract the space between the panes 5 to seal the environment so that the special gas does not escape. It is determined It has been found that polyisobutylene has a great resistance to diffusion of the special gas opposed. This is desirable so that the insulating glass 1 as long as possible in the Remains functional with regard to heat and / or noise insulation.

In addition to the purpose of sealing, polyisobutylene acts on the contact surfaces, namely the discs 2 and the spacer 3 also make an adhesion, so that it holds the discs 2 and the spacer 3 together with a certain adhesion.

ter spacer 3 is from the circumference of the discs 2 by a predetermined Spaced. This one-sided open space 6 is with an adhesive, namely sealed with a thio-elastomer known under the trade name Thiokol. The adhesive 7 gives the insulating glass 1 the. final strength and beyond also the final waterproofing.

In the production line generally designated 11 in FIG Production of insulating glasses 1 is shown in the direction of passage indicated by an arrow 12 marked. The production line 11 includes a washing station 13 in which the Slices 2 are washed for the purpose of cleaning. After that the slices 2 assembled in an assembly station 14, this assembly being the assembling the discs 2 at a distance from each other, which by the between the discs delegated spacer 3 is guaranteed.

Due to the adhesive effect of the sealant 4 be liable the discs 2 to such a degree on the spacer 3 that the arrangement thus formed represents a preliminary product, this arrangement is passed through a roller press 15, where the discs 2 and the sealant 4 are pressed together, creating the adhesion considerably enlarged, the sealing gap considerably reduced and the sealing width is enlarged considerably. The last two features mentioned make d ~ r Diffusion of a special gas located in the space between the panes 5 is counteracted.

After being pressed together, the arrangement is placed on a buffer belt 16. From here, the arrangement is guided into a gas filling station 17, the configuration of which is yet to be explained. After the gas filling station, the arrangement arrives on a tilting table 18, where it is rotated 90O. The tilting table 18 follows in the direction of passage 12 Sealing table 19 on which the spacer 3 surrounding space 6 between the Disc edges as well as the closed by means of a simplified shown in Fig. 1 Pop rivet 9 tightly closed filling hole S is sealed with the adhesive 7.

According to Fig. 3, the gas filling station 17 is through a vacuum chamber 1p formed, the four stationary walls 22 and in the direction of passage 12 on their narrow sides has two movable walls 23 (e.g. locks) with which the vacuum chamber 21 for the purpose of introducing or removing the arrangement generally designated 24 here can be opened and tightly closed.

A vacuum pump 25 is used to evacuate the vacuum chamber 21, which is connected to the vacuum chamber 21 by a suction line 26.

A supply line is used to flood the vacuum chamber 21 with the special gas 27 into one line 28 for argon, a line 29 for sulfur hexafloride (SF6) and a line 30 for one, for example, consisting of the two aforementioned Gas mixture opens. In the lines 28 to 30 shut-off valves 31 are. .

intended. Also in the suction line 26 and the supply line 27 shut-off valves 32, 33 are arranged, which are denoted by a general number 34 Control device are closed and opened. The control device 34 has a pressure gauge which is connected to the vacuum chamber 21 by a line 35 is.

In addition, the control device 34 is connected by control lines 36 connected to the electrically operated shut-off valves 32, 33.

To fill the space between the panes 5 with the special gas, the Assembly 24 inserted in an upright position into the vacuum chamber 21 and the vacuum chamber 21 sealed by closing the walls 23. Then open the shut-off valve 32 and switching on the vacuum pump 25, the vacuum chamber 21 is evacuated. Simultaneously the space between the panes 5 is evacuated because the pressure in the vacuum chamber 21 propagates through the filling opening 37 into the space 5 between the panes.

When the pressure gauge measures a pressure of 50 mb, the shut-off valve opens 32 closed and the shut-off valve 33 opened, so that with the help of the valves 31 selectable special gas flows into the vacuum chamber 21.

At the same time, the special gas also flows in through the filling opening 37 the space between the panes 5. If now the pressure in the vacuum chamber 21 a certain value, e.g. At least the external pressure is reached, the vacuum chamber is filled 21 and the space between the panes completed. At the same time, the shut-off valve 33 are closed so that no more special gas flows in. Then will the vacuum chamber 21 opened by opening the movable walls 23.

Before the arrangement 24 is led out, it is removed from the inner wall lifted from the vacuum chamber against which it rests, causing a drag on the inner wall and to avoid scratches on the panes 2 resulting therefrom.

For this purpose, compressed air is used, which is simplified by a compressed air line 41 and illustrated inlets 42 between the wall 22 of the vacuum chamber 21 and the assembly 24 is pressed so that the assembly 24 lifts off the wall 22. At 43 are Denotes sensors which sense the position of the arrangement 24 and through a control line 44 a switching valve 45 in the compressed air line 41 for the purpose of opening or closing actuate.

The production line shown in FIG. 4, generally designated 51 also has a washing station 52, an assembly station 53, a gas filling station 54, a press 55, a tilting table 56 and a sealing station 57. A The essential difference to the embodiment according to FIG. 2 is that the press 55 is arranged downstream of the gas filling station 54 in the flow direction 12.

As with the first embodiment, it is also with the second embodiment the gas filling station 54 is formed by a vacuum chamber 21 according to FIG. 3.

In contrast to the first exemplary embodiment, in the second exemplary embodiment the arrangement does not have a special filling hole, as can be seen in FIG. 1 and 3 is denoted by 8 and 37, respectively.

The filling opening inevitably necessary when filling in the vacuum chamber 21 is formed here by (Fig. 5), that a disc 2 opposite the other is set slightly obliquely diverging downwards, so that one downwards diverging gap 58 between the one disc 2 and the spacer 3 or the sealant 4 consists. 5 clearly shows the arrangement designated here by 59 in the area of the assembly station 53, in which the arrangement 59 rests on the rollers 61 of a transport frame 62 is located. The arrangement 59 is put together in such a way that that initially the spacer 3 is placed on the disc 2 on the left in the drawing is, whereby it adheres to this disc 2 due to the sealing material 4. Then it will be the disc 2 on the right in FIG. 5 at a distance forming the gap 58 onto the rollers 61 placed and tilted against the spacer 3. In this position the The arrangement 59 is introduced into the vacuum chamber 21, which is shown in simplified form in FIG. 3 and filled with the special gas, the special gas through the gap 58, which is shown enlarged in the drawing, flows into the space 5 between the panes.

Fig. 5 shows that the arrangement 59 is in a certain inclined position is located and supported on the broad side by the left disk 2 on the transport frame 62 is.

Upon opening the vacuum chamber, the assembly 59 is immediately pressed so that as little special gas as possible escapes from the space 5 between the panes.

Tests have shown that there is a few seconds between opening the vacuum chamber and the compression of the assembly 59 are harmless because of the . Gap 58 is relatively small and a noticeable replacement of the gas filling therefore does not take place in the space between the panes.

If a larger gap 58 is to be used, appears it is advantageous to the arrangement 59 immediately after filling and before the Open the vacuum chamber 21 and push the right in Fig. 5 disc 2 to rest on the spacer 3, whereby the gap 58 is closed will. For this purpose, it is advantageous to use the gas filling station 54 or the vacuum chamber 21 assign a pressing device, not shown. It's in easier and more beneficial Way also possible to press the right disk 2 in Fig. 5 with the help of compressed air, e.g. in the first embodiment for lifting off the designated 24 there Arrangement described or in a similar manner.

The production line 65 of the third exemplary embodiment shown in FIG. 6 also has a washing station 66, an assembly station 67, a pressing station 68, a tilting station 69, a sealing station 70 and a gas filling station 71 on. In this embodiment, however, the sealing station 70 is located in front of the gas filling station 71. Production in the flow direction 12 therefore proceeds as follows take place. The discs 2 are washed in the washing station 66 and in the assembly station 77 assembled with the spacer 3. The arrangement thus formed then passes through the press station 68 where the assembly is pressed. Then the arrangement in the tilting station 69 rotated by 900 and led to the sealing station 70, where it is sealed, leaving a filling hole in the spacer 3. The sealed If necessary, the arrangement is moved into the gas filling station 71 after a curing time guided and filled with special gas, which is due to the presence of the filling hole is possible. After filling, the arrangement is guided to a sealing station 72, where the filling hole, for example by a pop rivet, closed and if necessary is additionally sealed.

In particular in the event that the special gas is heavier than air, is useful the at least one filling hole 8 in the upper horizontal leg of the Spacer 3 or near this, provided approximately at the top of the vertical leg, whereby the penetration of air into the space between the panes 5 between the vacuum chamber 21 and the closing of the filling hole 8 is largely avoided.

The special gas can also be filled with a slight excess pressure.

It should also be mentioned that the spacer 3 by a hollow profile is formed, the inside a molecular sieve, in particular 3A molecular sieve, for Binding of moisture in the space between the panes 5 contains, which is why also small There are openings to the space between the panes 5.

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Claims (13)

CLAIMS 1. Method for producing one of at least two discs existing insulating glass, in which the panes are washed, by interposing a Covered with a sealant, circumferential spacer in their final position are brought to one another and in which the arrangement is pressed under pressure is, the arrangement is introduced into a chamber and there the space between the panes is filled with a special gas and then the insulating glass formed in this way with a Adhesive is sealed, characterized in that a Polyisobutylene is used that at least one fill hole (8.37) in the spacer (3) it is provided that the arrangement (24) after pressing in a vacuum chamber (21) is introduced so that the vacuum chamber (21) is set to a negative pressure Worth evacuating that the Vacuum chamber (21) then with the special gas is flooded so that the arrangement (24) is then led out of the vacuum chamber (21) is, then the filling hole (8,37) is closed and that then the insulating glass (1) is sealed. 2. A method for producing one consisting of at least two disks Insulating glass, in which the panes are washed, through the interposition of one with a sealant occupied, circumferential spacer in their final position are brought to one another and in which the arrangement is pressed under pressure is, the arrangement is introduced into a chamber and there the space between the panes is filled with a special gas and then the insulating glass formed in this way with a Adhesive is sealed, the assembly prior to being pressed into the chamber is introduced, characterized in that a polyisobutylene is used as the sealant (4) is that the arrangement (24) while maintaining an at least partial gap (58) between at least one disc (2) and the spacer (3) in a vacuum chamber (21) is introduced that the vacuum chamber (21) to a predetermined negative pressure Value is evacuated so that the vacuum chamber (21) is then flooded with the special gas is that the arrangement (24) is then led out of the vacuum chamber (21), that the insulating glass (1) is then pressed and that the insulating glass (1) is then sealed will. 3. A method for producing one consisting of at least two disks Insulating glass, in which the panes are washed, by interposing one with one Sealant-covered, circumferential spacing halters in your final Position to be brought to each other and in which the arrangement is under pressure is pressed, and the arrangement is introduced into a chamber and there the space between the panes is filled with a special gas, and then the insulating glass formed in this way with a Adhesive is sealed, characterized in that the arrangement (24) according to the Sealed by pressing while maintaining a filling hole (8.37) in the spacer (3) is that for this purpose a thio-elastomer is used as the adhesive (7) that the arrangement (24) is introduced into a vacuum chamber (21) that the vacuum chamber (21) on one The vacuum chamber (21) is then evacuated with a predetermined value the special gas is flooded so that the arrangement (24) then out of the vacuum chamber (21) is led out, in which case the filling hole (8,37) is closed and sealed. 4. The method according to claim 2, characterized in that the arrangement (24) is introduced into the vacuum chamber (21) in a position in which at least a washer (2) is only partially in contact with the spacer (3) and at an acute angle (Gap 58) with the other disc (2) encloses, which is preferably open downwards is. 5. The method according to claim 2 or 4, characterized in that the Arrangement (24) is pushed together after the flooding. 6. The method according to claim 1 or 3, characterized in that the filling hole is closed with a pop rivet. 7. The method according to claim 6, characterized in that the pop rivet flush with the circumferential surface of the spacer (3). 8. The method according to any one of claims 3 to 7, characterized in that that the special sealing of the filling hole takes place with the help of a cartridge. 9. The method according to any one of claims 1 to 8, characterized in that that the vacuum chamber (21) is evacuated to a negative pressure of about 50 mb. 10. The method according to any one of claims 1 to 9, characterized in, that the arrangement (24) is inserted in the upright position into the vacuum chamber (21) will. 11. The method according to claim 9, characterized in that the filling hole (37) in the upper region of the horizontal leg or near the upper end at least an upright leg of the spacer (3) is provided. 12. The method according to claim 3, characterized in that as a sealant (4) a polyisobutylene is used. 13. The method according to claim 1 or 2, characterized in that a thio-elastomer is used as the adhesive (7).