EP3093423A1 - Spacer for insulating glazing - Google Patents

Abstract

Spacer (I) for insulating glazing at least comprising a base body (1) comprising a first pane contact surface (2.1) and a second pane contact surface (2.2) running parallel to it, a first glazing interior surface (3.1), a second glazing interior surface (3.2), an outer surface (4) , a first hollow chamber (5.1) and a second hollow chamber (5.2), whereby - A groove (6) for receiving a pane runs parallel to the first pane contact surface (2.1) and the second pane contact surface (2.2) between the first glazing interior surface (3.1) and the second glazing interior surface (3.2), - the first hollow chamber (5.1) adjoins the first glazing interior surface (3.1) and the second hollow chamber (5.2) adjoins the second glazing interior surface (3.2), - The side flanks (7) of the groove (6) are formed by the walls of the first hollow chamber (5.1) and the second hollow chamber (5.2) and - The base body (1) is made essentially of metal.

Description

The invention relates to a spacer for insulating glazings, a glazing, a process for their preparation and their use.

The thermal conductivity of glass is about a factor of 2 to 3 lower than that of concrete or similar building materials. However, since slices are in most cases much thinner than comparable elements made of stone or concrete, buildings often lose the largest proportion of heat through the exterior glazing. The additional costs for heating and air conditioning systems make up a not inconsiderable part of the maintenance costs of a building. In addition, lower carbon dioxide emissions are required as part of stricter construction regulations. An important solution for this is triple-glazing, which is indispensable in building construction, especially in the context of ever faster rising raw material prices and stricter environmental protection regulations. Triple insulating glazings therefore make up an increasing part of the outwardly facing glazings.

Triple insulating glazings typically contain three panes of glass or polymeric materials separated by two individual spacers. It is placed on a double glazing by means of an additional spacer another disc. When mounting such a triple glazing very low tolerance requirements apply because the two spacers must be mounted in exactly the same height. Thus, the installation of triple glazing compared to double glazing is much more complex because either additional system components for the installation of another disc must be provided or a time-consuming multiple pass of a classic system is necessary.

WO 2014198431 and WO 2014198429 disclose a hollow profile spacer made of polymers, which has a groove-shaped receiving profile for a central disc. It is advantageous in this spacer that only a single spacer must be mounted, and thus eliminates the step of adjusting two individual spacers in the conventional triple glazing. A disadvantage of this polymeric hollow profile spacer, however, is that on the outside of a gas and vapor-tight barrier must be applied, since the tightness of the polymeric Basic body alone is not sufficient to seal the inner space between the panes against ingress of water and the loss of inert gas contained. Accordingly, the preparation of the spacer must be carried out separately from the production of the insulating glass unit, since after an extrusion of the polymeric base body must first cure in order to be provided in a second step with a film or a coating, which must also cure depending on the preparation.

An object of the present invention is to provide an improved spacer for insulating glazings, to provide an insulating glazing as well as an economical method of assembling an insulating glazing with a spacer according to the invention.

The object of the present invention is achieved by a spacer for double glazing according to the independent claim 1. Preferred embodiments of the invention will become apparent from the dependent claims.

The spacer for insulating glazings according to the invention comprises at least one main body, which has a first wafer contact surface and a second disk contact surface extending parallel thereto, a first glazing interior surface, a second glazing interior surface and an outer surface. The main body has a wall thickness d. In the main body, a first hollow chamber and a second hollow chamber and a groove are introduced. The groove extends parallel to the first disc contact surface and second disc contact surface and serves to receive a disc. The first hollow chamber is adjacent to the first glazing interior surface while the second hollow chamber is adjacent to the second glazing interior surface, the glazing interior surfaces being above the hollow chambers and the outer surface being below the hollow chambers. Above is in this context as the disk interior of a double glazing with inventive spacer facing and below facing away from the disk interior. As the groove extends between the first glazing interior surface and the second glazing interior surface, it laterally delimits them and separates the first and second hollow chambers from one another. The side edges of the groove are formed by the walls of the first hollow chamber and the second hollow chamber. The groove forms a recess which is suitable for the middle disc (third disc) Insulating glazing record. Thereby, the position of the third disc on two side edges of the groove and the bottom surface of the groove is fixed. The main body consists essentially of metal. Essentially in the context of the invention means that the main body consists of at least 90% of metal, preferably at least 95%, particularly preferably at least 99%. Since the base body is made of metal, the spacer has a very good gas and vapor tightness even without a barrier film or barrier coating. As a result, material costs and production costs can be saved.

In a preferred embodiment, the base body is produced by a roll forming process, particularly preferably in a cold rolling process. A thin metal sheet is bent into the right shape. These processes can be integrated directly into the insulating glass production so that the basic body is produced directly before the assembly of the insulating glass on the same production line. This saves storage and transport costs compared to a separate production of the spacer. Alternatively, the base body can also be produced, for example, in an extrusion process.

Preferably, the bottom surface of the groove directly adjoins the outer surface of the base body, without extending one or both hollow chambers below the groove. This achieves the greatest possible depth of the groove, maximizing the area of the side flanks to stabilize the pane.

In a preferred embodiment of the spacer according to the invention, the wall thickness d _B is increased in the area of the bottom surface of the groove in comparison to the wall thickness d of the base body. As a result, the stability is increased in the area of the bottom surface, so that the burden of the third disc can be better absorbed. Preferably, the wall thickness d _B in the region of the bottom surface is at least twice the wall thickness d of the main body, namely 2 d, and at most four times the wall thickness d of the main body, namely 4 d. This achieves a particularly good stabilization of the floor area. Particularly preferably, the wall thickness d _B in the area of the bottom surface is exactly 2 d. This embodiment is easy to realize, in particular in the case of base bodies produced by roll forming, since in this case the thin metal sheet can be laid twice in the area of the bottom surface.

In a preferred embodiment, a web is mounted on the opposite side of the groove of the spacer according to the invention. The web is preferably located directly below the groove and is mounted on the outer surface of the body. The bridge serves to support the spacer frame with integrated third pane during the production of insulating glass after the gluing of the first and second pane to the pane contact surfaces. Thus, slippage of the spacer frame is prevented before and after the pressing or during the curing of the outer seal. When using a spacer with web, sagging of the spacer frame with integrated center glass during the production of insulating glass, as would happen with comparable spacers without a web, is impossible. The spacer is inserted so that the edge of the web is flush with the edges of the two disks and is thus flush with them. The spacer bar thus divides the outer pane space into two outer pane spaces, a first outer pane space, and a second outer pane space. The outer space between the panes is defined as the space bounded by the first pane, the second pane and the outer surface of the standoff. Since the entire outer pane space between the outer panes is divided by the gutter of the spacer into two narrower panes, the filling with the material of the outer seal can be performed on a standard triple glazing unit. These systems usually use two nozzles, which are each guided between an outer disc and adjacent middle disc, the two disc edges serve as a guide. The web of the spacer takes over the function of the middle disc and serves as a guide for the nozzle for filling the outer pane spaces with the material of the outer seal.

The edge of the web refers to the lower surface of the web, which faces away from the disc interior and facing the outside environment after installation in an insulating glazing. The side surfaces of the web are the surfaces of the web, which point after installation of the spacer in an insulating glazing to the first disc and the second disc and parallel to these. The side surfaces are in the finished glazing in contact with the outer seal. The side surfaces of the web can both run parallel to the first disc and the second disc and be inclined in one or the other direction. The height b of the web gives the dimensions of the outer space between the panes of the finished insulating glazing, since its edge is at the same height as the edges of the outer panes. The height b is preferably between 2 mm and 8 mm. The width a of the web preferably coincides with the width of the groove on the bottom surface, since a particularly good stabilization of the spacer frame is achieved. The width a of the web is preferably between 1 mm and 10 mm, particularly preferably between 2 mm and 5 mm.

In a particularly preferred embodiment, the web is formed as a T-profile. The web comprises in this case two side arms, which are mounted on the outer wall of the spacer. The two side arms contribute to an improvement in the stability of the spacer, since the contact area between the web and outer wall is increased. In addition, they increase the stability of the spacer in the region of the groove, in particular if the bottom surface of the groove adjacent to the outer wall of the spacer. The side arms may extend over the entire outer surface of the polymeric body or cover only a portion of the outer surface. Preferably, they cover about 40% to 60% of the outer surface. The thickness of the side arms is between 1 mm and 3 mm. With these dimensions, a particularly good stability of the web is achieved.

The web preferably contains polyethylene (PE), polycarbonates (PC), polypropylene (PP), polystyrene, polybutadiene, polynitriles, polyesters, polyurethanes, polymethylmethacrylates, polyacrylates, polyamides, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), preferably acrylonitrile-butadiene- Styrene (ABS), acrylic ester-styrene-acrylonitrile (ASA), acrylonitrile-butadiene-styrene / polycarbonate (ABS / PC), styrene-acrylonitrile (SAN), PET / PC, PBT / PC and / or copolymers or mixtures thereof. Optionally, the web can also be glass fiber reinforced. Particularly preferably, the material of the web has the same coefficient of linear expansion as the main body. This contributes to an improved stability of the spacer.

In a preferred embodiment of the spacer according to the invention, the base body preferably contains aluminum and / or stainless steel or consists essentially of aluminum and / or stainless steel. These materials are particularly stable and durable body can be produced.

In a further preferred embodiment, the base body contains or essentially consists of an aluminum alloy or stainless steel alloy. Particularly good results can be achieved with these alloys.

Particularly preferably, the main body consists essentially of an aluminum alloy with a thermal conductivity of at most 160 W / (m K) [watts per meter and Kelvin]. The use of such aluminum alloys improves the heat-insulating properties of the edge seal of the insulating glazing.

In an alternative preferred embodiment, the base body contains or essentially consists of a stainless steel alloy, particularly preferably a stainless steel alloy with a thermal conductivity of at most 80 W / (m K) [watts per meter and Kelvin]. The use of such stainless steel alloys further improves the heat-insulating properties of the edge seal of the insulating glazing.

"Essentially" in the sense of the invention means that the main body consists of at least 90% of the corresponding metal, preferably at least 95%, particularly preferably at least 99%.

In a preferred embodiment of the spacer according to the invention, a gas-permeable insert is provided in the groove or at least two inserts are attached at a distance of at least 1 mm. As a result, in the finished insulating glazing a gas exchange between the inner space between the panes, which adjoin the first and second glazing interior surfaces, made possible. The groove is wider than the disc mounted therein, so that the insert can be inserted into the groove. The insert prevents slippage of the disc and a consequent noise when opening and closing the window. The insert is attached at least in a region of the side edges of the groove, for example, as bulges in a portion of the two side edges. Preferably, the insert also extends over the bottom surface of the groove, whereby a rattle noise of the disc can be particularly effectively prevented. The insert also compensates for the thermal expansion of the third disc when heated, so that regardless of the climatic conditions, a tension-free fixation is guaranteed. Further, the use of an insert advantageous in terms of minimizing the variety of variants of the spacer. In order to keep the variety as low as possible and still allow a variable thickness of the middle disc, a spacer with different deposits can be used. The variation of the insert is in terms of production costs cheaper than the variation of the spacer.

A gas-permeable embodiment of the insert according to the invention means that in a finished insulating glazing the first inner space between the first disc and the third disc is connected to the second inner space between the third disc and the second disc so that an air or gas exchange is possible. This allows a pressure equalization between the inner panes, which leads to a significant reduction of the load on the middle pane compared to a version with hermetically sealed inner panes. Thus, thinner wafers and in particular non-tempered wafers can be used. This gas-permeable design can be realized by the use of porous materials such as polymer foams, or in the use of gas-tight materials by the introduction of compounds such as one or more channels into the liner. Alternatively, the insert is not continuously disposed along the entire spacer profile in the groove, but only in individual sections deposits are placed in which the disc is fixed in order to prevent rattling of the disc in the groove. The distances between the inserts are at least 1 mm. In the unobstructed areas without an insert, an exchange of air and thus a pressure equalization between adjacent inner pane interstices can take place. Since the inserts are attached in sections, material costs can be saved as compared to attachment along the entire spacer profile.

In a preferred embodiment, the insert is inserted or inserted in the groove. In this case, the base body is first manufactured, and before the Isolierglaszusammenbau the prefabricated insert is inserted or inserted into the groove. As insert suitable profiles can be made separately by extrusion. Alternatively, sealing tapes or sealing profiles can also be purchased as rolled goods. This design of insert and body allows a particularly flexible adaptation of the production of insulating glass, since at different disc thicknesses of the middle glass of the same body can be used and only the insert must be varied.

In a further advantageous embodiment, the insert is injected into the groove of the previously manufactured base body. This process is particularly easy to automate. Particularly advantageous is the injection in connection with the interrupted execution of the insert, since it is very easy to inject the insert only in individual sections.

Preferably, the insert contains a butyl sealant. Butyl sealants are widely used in insulating glass production to ensure the bonding of spacers and discs. These sealants are therefore tried and tested for use in insulating glazing and particularly well suited. Butyl can be used in the form of finished cords or, after heating, injected into the designated places in the groove.

Preferably, the insert contains a thermoplastic elastomer, preferably a thermoplastic urethane-based elastomer (TPU). Thermoplastic elastomers are particularly advantageous due to the good processability. The elastomers used must not contain any substances which escape during the service life into the interior of the pane and cause precipitation there. With urethane-based thermoplastic elastomers, particularly good results are achieved.

Preferably, the insert contains a silicone sealant. The silicone sealant can be injected or used as a prefabricated profile. With silicone sealants good results are achieved.

In an alternative advantageous embodiment, the insert contains an ethylene-propylene-diene rubber (EPDM). Particularly good results are achieved with this material.

The side flanks of the groove may be both parallel to the disc contact surfaces as well as inclined in one or the other direction. By a slope of the side edges in the direction of the third disc, a taper is generated, which can serve to fix the third disc targeted. In addition, the visual impression can be improved when looking in the direction of the glazed interior surfaces, because through the taper a recorded in the lower part of the groove insert can be covered. Furthermore, curved side flanks are also conceivable, with only the middle section of the side flanks resting against the third pane. The curved side edges have a very good spring action, especially for small wall thicknesses. Thereby, the flexibility of the side edges is further increased, so that a thermal expansion of the third disc can be compensated for particularly advantageous, so that a tension-free fixation is ensured even without the use of an insert. When no liner is fitted in the groove, the first disc space and the second disc space are not sealed airtight from each other. This has the advantage that an air circulation can be generated, in particular if a pressure equalization system is integrated into the spacer.

The hollow chambers of the spacer according to the invention not only contribute to the flexibility of the side flanks, but can be available for receiving other components, such as a desiccant. The hollow chambers are preferably sealed tight, so that no desiccant contained can escape. Any openings along the glazing interior surface are designed so that moisture in the inner space between the panes can be absorbed by the desiccant in the hollow chamber without the desiccant can get into the inner space between the panes.

The first disc contact surface and the second disc contact surface represent the sides of the spacer at which the installation of the spacer, the mounting of the outer discs (first disc and second disc) of a glazing is done. The first disc contact surface and the second disc contact surface are parallel to each other.

The glazing interior surfaces are defined as the surfaces of the base body facing the interior of the glazing after installation of the spacer in insulating glazing. The first glazing interior surface lies between the first and the third pane, while the second glazing interior surface is arranged between the third and the second pane.

The outer surface of the main body is the glazing interior surfaces opposite side, away from the interior of the glazing in the direction an outer seal facing. The outer surface is preferably perpendicular to the disc contact surfaces. However, the portions of the outer surface closest to the disk contact surfaces may alternatively be inclined at an angle of preferably 30 ° to 60 ° to the outer surface in the direction of the disk contact surfaces. This angled geometry improves the stability of the body. A planar outer surface that behaves perpendicular to the disk contact surfaces in its entire course, however, has the advantage that the sealing surface between spacers and disc contact surfaces is maximized and easier shaping facilitates the production process.

The main body preferably has an overall width of 10 mm to 50 mm, particularly preferably 20 mm to 36 mm, along the glazing interior surfaces. By choosing the width of the glazing interior surfaces of the distance between the first and third disc or between the third and second disc is determined. Preferably, the widths of the first glazing interior space and the second glazing interior space are equal. Alternatively, asymmetric spacers are possible in which the two glazing interior surfaces have different widths. The exact dimension of the glazing interior surfaces depends on the dimensions of the glazing and the desired space between the panes.

The base body preferably has a height of 5 mm to 15 mm, particularly preferably 5 mm to 10 mm, along the disc contact surfaces.

The groove preferably has a depth of 1 mm to 15 mm, particularly preferably 2 mm to 4 mm. As a result, a stable fixation of the third disc can be achieved.

The wall thickness d of the main body is 0.05 mm to 2 mm, preferably 0.08 mm to 1.8 mm, particularly preferably 0.10 mm to 1 mm.

The main body preferably contains a drying agent, preferably silica gels, molecular sieves, CaCl ₂ , Na ₂ SO ₄ , activated carbon, silicates, bentonites, zeolites and / or mixtures thereof. The desiccant is preferably in the first and second hollow chamber of the body.

In a preferred embodiment, the first glazing interior surface and / or the second glazing interior surface have at least one opening. Preferably, a plurality of openings are attached to both glazing interior surfaces. The total number of openings depends on the size of the glazing. The openings connect the hollow chambers with the disc spaces, whereby a gas exchange between them is possible. As a result, a recording of humidity is allowed by a desiccant located in the hollow chambers and thus prevents fogging of the discs. The openings are preferably designed as slots, particularly preferably as slots with a width of 0.2 mm and a length of 2 mm. The slots ensure optimum air exchange without the possibility of desiccants penetrating from the hollow chambers into the interpane spaces.

The invention further comprises an insulating glazing having at least a first pane, a second pane and a third pane and a circumferential spacer according to the invention arranged between the first and second pane. The first disc is applied to the first disc contact surface of the spacer, while the second disc rests against the second disc contact surface. The third disc is inserted into the groove of the spacer. Between the first disc and the third disc is the first inner disc space defined by the spacer. Between the third disc and the second disc is the second inner disc space bounded by the spacer. In the outer pane clearance, bounded by the outer surface of the base body and the first disc and the second disc, an outer seal is arranged. The outer seal serves for the mechanical stabilization of the insulating glazing. As an external seal, for example, a plastic sealing compound is used.

In a preferred embodiment of the insulating glazing invention, a web is mounted below the groove of the spacer. The first disc and the second disc are arranged in parallel and congruent. The edges of the two discs are therefore arranged flush in the edge region, that is, they are located at the same height. The spacer is inserted so that the edge of the web is flush with the edges of the two disks and is thus flush with them. The bridge of the spacer shares with the outer Disc space in two outer pane spaces, a first outer pane space and a second outer space between the panes. The outer space between the panes is defined as the space bounded by the first pane, the second pane and the outer surface of the standoff. The outer pane interspaces are filled with an outer seal. As an external seal, for example, a plastic sealing compound is used.

The outer sealant preferably contains polymers or silane-modified polymers, more preferably organic polysulfides, silicones, room-temperature vulcanizing (RTV) silicone rubber, peroxide-crosslinked silicone rubber and / or addition-crosslinked silicone rubber, polyurethanes and / or butyl rubber.

The spacer is preferably bent into a peripheral frame. The seam is preferably arranged on a longitudinal side, wherein the two ends of the spacer are connected via a longitudinal connector. In principle, the most varied geometries of insulating glazing are possible, for example rectangular, trapezoidal and rounded shapes.

The panes of the insulating glazing are connected to the spacer via a gasket. Between the first disc and the first disc contact surface and / or the second disc and the second disc contact surface, a seal is attached thereto. The seal contains a polyisobutylene. The polyisobutylene may be a crosslinking or non-crosslinking polyisobutylene.

The first pane, the second pane and / or the third pane of the insulating glass preferably contain glass and / or polymers, particularly preferably quartz glass, borosilicate glass, soda-lime glass, polymethyl methacrylate and / or mixtures thereof.

The first disc and the second disc have a thickness of 2 mm to 50 mm, preferably 3 mm to 16 mm, both discs can also have different thicknesses. The third disc has a thickness of 1 mm to 4 mm, preferably 1 mm to 3 mm, and particularly preferably 1.5 mm to 3 mm. The spacer according to the invention allows by the stress-free fixation an advantageous reduction of the thickness of the third disc with the same stability of the glazing. Preferably, the thickness of the third disc is less than the thicknesses of the first and second discs. In one possible embodiment, the thickness of the first disc 3 mm, the thickness of the second disc 4 mm and the thickness of the third disc 2 mm. Such an asymmetrical combination of the thicknesses leads to a considerable improvement of the acoustic damping.

The insulating glazing is filled with a protective gas, preferably with a noble gas, preferably argon or krypton, which reduce the heat transfer value in the insulating glazing gap.

The third pane of the insulating glass preferably has a low-E coating. With low-E coatings, the thermal insulation capacity of the insulating glazing can be further increased and improved. These coatings are heat radiation reflective coatings that reflect a significant portion of the infrared radiation, resulting in reduced warming of the living space in the summer. The various low-E coatings are known, for example DE 10 2009 006 062 A1 . WO 2007/101964 A1 . EP 0 912 455 B1 . DE 199 27 683 C1 . EP 1 218 307 B1 and EP 1 917 222 B1 ,

The third pane of the insulating glass is preferably not biased. By saving the tempering process, the manufacturing costs can be reduced. Furthermore, the disc is fixed in the groove with flexible side edges and / or an insert and not by an adhesive connection. Since a pressure equalization between the inner space between the panes is possible in an insulating glazing according to the invention, the load on the third pane is significantly lower than on hermetically sealed inner panes. Thus, the spacer according to the invention allows the production of a triple glazing with a low-E coating on the third disc, without biasing the third disc is necessary. In an adhesive bond or otherwise rigid locking of the disc due to the low-E coating caused heating of the disc would promote failure of the adhesive bond. Furthermore, a bias of the third disc would be necessary to compensate for occurring voltages. When using the spacer according to the invention, however, eliminates the biasing process, whereby a further cost reduction can be achieved. The tension-free fixing in the groove according to the invention furthermore makes it possible to advantageously reduce the thickness and thus the weight of the third disk.

In a further embodiment, the insulating glazing comprises more than three panes. In this case, the spacer may include a plurality of grooves that can accommodate more discs.

It could also be formed several discs as a laminated glass.

1. a) Bereitstellen eines Grundkörpers,
2. b) Einsetzen der dritten Scheibe in die Nut des Abstandshalters,
3. c) Anbringen der ersten Scheibe auf der ersten Scheibenkontaktfläche des Abstandshalters,
4. d) Anbringen der zweiten Scheibe auf der zweiten Scheibenkontaktfläche des Abstandshalters und
5. e) Verpressen der Scheibenanordnung.

The invention further comprises a method for producing an insulating glazing according to the invention comprising the steps:

1. a) providing a basic body,
2. b) inserting the third disc in the groove of the spacer,
3. c) attaching the first disk to the first disk contact surface of the spacer,
4. d) attaching the second disc on the second disc contact surface of the spacer and
5. e) pressing the disc assembly.

First, a base body, for example by roll forming, produced. This can be done on the same system as the assembly of the insulating glass unit. This saves transportation and storage costs. Subsequently, the third disc can be inserted into the groove. After inserting the third disc in the groove of the spacer this pre-assembled component can be processed on a conventional double-glazing system known in the art. The costly installation of additional plant components or a loss of time in multi-pass a plant as in the use of multiple spacers can thus be avoided. This is particularly advantageous in terms of productivity gain and cost reduction.

Preferably, the disc gaps between the first disc and the third disc and between the second disc and the third disc are filled with a protective gas before pressing the disc assembly.

The invention further includes the use of a spacer according to the invention in multiple glazings, preferably in insulating glazings, particularly preferably in triple insulating glazings.

Figur 1

eine mögliche Ausführungsform des erfindungsgemäßen Abstandshalters,

Figur 2

eine weitere mögliche Ausführungsform des erfindungsgemäßen Abstandshalters,

Figur 3

einen Querschnitt durch eine weitere mögliche Ausführungsform des erfindungsgemäßen Abstandshalters mit einer Einlage,

Figur 4

einen Querschnitt durch eine weitere mögliche Ausführungsform des erfindungsgemäßen Abstandshalters,

Figur 5

einen Querschnitt durch eine weitere mögliche Ausführungsform des erfindungsgemäßen Abstandshalters mit zwei Nuten,

Figur 6

einen Querschnitt einer möglichen Ausführungsform der erfindungsgemäßen Isolierverglasung im Randbereich,

Figur 7

einen Querschnitt einer weiteren möglichen Ausführungsform der erfindungsgemäßen Isolierverglasung im Randbereich.

In the following the invention will be explained in more detail with reference to drawings. The drawings are purely schematic representations and not to scale. They do not limit the invention in any way. Show it:

FIG. 1

a possible embodiment of the spacer according to the invention,

FIG. 2

a further possible embodiment of the spacer according to the invention,

FIG. 3

a cross-section through a further possible embodiment of the spacer according to the invention with an insert,

FIG. 4

a cross section through a further possible embodiment of the spacer according to the invention,

FIG. 5

a cross-section through a further possible embodiment of the spacer according to the invention with two grooves,

FIG. 6

a cross section of a possible embodiment of the insulating glazing according to the invention in the edge region,

FIG. 7

a cross section of another possible embodiment of the invention in the edge glazing.

FIG. 1 1 shows a perspective view of the spacer I according to the invention. The main body 1 comprises a first wafer contact surface 2.1, a second wafer contact surface 2.2 extending parallel thereto, a first glazing interior surface 3.1, a second glazing interior surface 3.2 and an outer surface 4. Between the outer surface 4 and the first glazing interior surface 3.1 a first hollow chamber 5.1, while a second hollow chamber 5.2 between the outer surface 4 and the second glazing interior surface 3.2 is arranged. Between the two separate hollow chambers 5.1 and 5.2 there is a groove 6 which extends parallel to the disc contact surfaces 2.1 and 2.2. The side edges 7 of the groove 6 are formed by the walls of the two hollow chambers 5.1 and 5.2, while the bottom surface of the groove 12 directly adjacent to the outer surface 4 and is defined by the outer surface 4. As a result, the depth of the groove 6 is maximum and the disk to be used can be optimally stabilized. The side flanks of the groove 7 touch the bottom surface of the groove 12, that is, the hollow chambers 5.1 and 5.2 are completely closed. After any filling of the hollow chambers with a desiccant 11 is thus avoided that parts of the filling in the groove 6 or even in the inner Space between panes 17. The side flanks of the groove 7 are arched inwardly in the direction of a male in the groove 6 disc, so that after insertion of a disc, only the central portion of the side edges rests against the third disc. The curved side edges have a very good spring action, especially at low wall thicknesses d, so that a thermal expansion of the third disc can be compensated for particularly advantageous. The base body 1 is made of an aluminum alloy and the wall thickness d is 0.18 mm. The main body is made by roll forming from a thin metal sheet. The outer surface 4 extends mostly perpendicular to the disc contact surfaces 2.1 and 2.2 and parallel to the glazing interior surfaces 3.1 and 3.2. The glazing interior surfaces 3.1 and 3.2 have openings 8 at regular intervals, which connect the hollow chambers 5.1 and 5.2 in the finished insulating glazing to the air space above the glazing interior surfaces 3.1 and 3.2. The spacer I has a height of 6.5 mm and a total width of 34 mm. The first glazing interior surface 3.1 is 16 mm and the second glazing interior surface 3.2 is 16 mm wide.

FIG. 2 shows a perspective view of another embodiment of the spacer I according to the invention. The spacers shown corresponds in the basic features of the in FIG. 1 shown. The main body 1 consists of a thin, formed in a roll forming aluminum sheet. The side edges 7 of the groove 6 are inclined inwardly in the direction of a male in the groove 6 disc. This results in the amount of the glazing interior surfaces 3.1 and 3.2, a taper of the groove 6, which favors the fixation of a disc in the groove 6. The bottom surface of the groove 12 adjoins the outer surface 4 of the base body 1. In the region of the bottom surface of the groove 12, the metal sheet is arranged double, wherein the two layers of metal sheet touch, so that the hollow chambers 5.1 and 5.2 are sealed. The wall thickness d _B in the region of the bottom surface is 2 d, that is twice as large as the wall thickness d of the main body. Due to the double arrangement of the metal sheet, the groove 6 is additionally stabilized in the region of the bottom surface 12. Parallel to the disc contact surfaces extends a connecting seam 18, which is formed during the production of the base body of the thin aluminum sheet. The connecting seam 18 is shown enlarged in the drawing for simplicity. The connecting seam 18 is not mounted in the region of the outer surface 4 in order to prevent the tightness of the spacer from decreasing.

FIG. 3 shows a cross section through a spacer according to the invention. The spacer is essentially the same as in FIG. 2 shown spacers. The side edges of the groove 7 are inclined inwardly in the direction of a male in the groove 6 disc. In the groove 6, a porous insert 9 is introduced, which is mounted along the entire spacer profile. The insert 9 fixes the disk to be used in the groove 6 and prevents noise during opening and closing of the window and compensates for thermal expansion of the disk to be used when heated. The insert 9 covers the bottom surface of the groove 12 and the side edges of the groove 7. The insert 9 is made of a porous polyurethane foam. The use of the porous polyurethane foam ensures the connection of the inner pane spaces in the finished insulating glazing. As a result, after installation of a third disk 15 to be used, pressure equalization between adjacent inner pane interspaces 17.1 and 17.2 is made possible. The hollow chambers 5.1 and 5.2 are filled with a desiccant 11, such as a molecular sieve. Through the openings 8, a gas exchange between the hollow chambers 5.1, 5.2 and the disc spaces 17.1, 17.2 take place in the finished double glazing, wherein the desiccant 11, the humidity from the space between the panes 17.1 and 17.2 withdraws.

FIG. 4 shows a cross section through a further embodiment of the spacer according to the invention. The spacer is essentially the same as in FIG. 2 shown. The side edges 7 extend in this case parallel to the disk contact surfaces 2.1 and 2.2. In the region of the bottom surface of the groove 12, the metal sheet has only one layer, because the bottom surface 12 is formed by the same metal sheet as the outer surface 4 of the main body 1. The hollow chambers 5.1 and 5.2 are completely closed and contain a molecular sieve eleventh

FIG. 5 shows a cross section through an embodiment of the spacer (I) according to the invention with more than one groove 6. The general structure is as in FIG. 2 shown. The bottom surfaces of the grooves 12 adjoin the outer surface 4. In the area of the bottom surfaces 12, two layers of metal sheet are arranged, whereby the stability of the base body 1 is increased. This is particularly important in the area of the grooves 6, which must absorb the weight of the inner discs. The connecting seam 18 produced in the production by roll forming is arranged in the region of the central glazing interior surface and thus fulfills the function of the openings 8 in the two outer hollow chambers.

FIG. 6 shows a cross section through an insulating glazing in the edge region with a spacer I according to the invention, as in FIG. 2 shown. The space between the first disk 13 and the third disk 15 delimited by the first interior glazing area 3.1 is defined as the first inner space 17.1 and the space between the third space 15 and the second space 14 is defined by the second space inside the glazing 3.2 as the second inner space 17.2. About the openings 8 in the glazing interior surfaces 3.1 and 3.2, the inner pane spaces 17.1 and 17.2 are connected to the respective underlying hollow chamber 5.1 and 5.2. In the hollow chambers 5.1 and 5.2 is a desiccant 11, which consists of molecular sieve. Through the openings 8 there is a gas exchange between the hollow chambers 5.1, 5.2 and the disc spaces 17.1, 17.2 instead, wherein the desiccant 11, the humidity from the space between the panes 17.1 and 17.2 withdraws. The first plate 13 of the triple insulating glazing is connected via a seal 10 with the first disc contact surface 2.1 of the spacer I, while the second disc 14 is connected via a seal 10 with the second disc contact surface 2.2. The seal 10 is made of a crosslinking polyisobutylene. In the groove 6 of the spacer, a third disc 15 is inserted via an insert 9. The insert 9 encloses the edge of the third disc 15 and fits flush into the groove 6 a. The insert 9 is made of butyl rubber. The insert 9 fixes the third disc 15 stress-free and compensates for thermal expansion of the disc. Further, the insert 9 prevents noise by slipping the third disc 15. So between the two inner disc spaces 17.1, 17.2 gas exchange and thus pressure equalization can take place along the spacer profile in the longitudinal direction in the groove 6 more deposits 9 are mounted with gaps. The distance between the individual inserts 9 is about 2 cm. In the exposed sections, after installation of a third disc 15 to be used, it is possible to equalize the pressure between adjacent inner pane interspaces 17.1 and 17.2. The first disk 13 and the second disk 14 protrude beyond the disk contact surfaces 2.1 and 2.2 to form an outer disk space 24 which is filled with an outer seal 16, for example a polysulfide. The first disk 13 and the second disk 14 are made of soda-lime glass having a thickness of 3 mm, while the third disk 15 is made of soda-lime glass having a thickness of 2 mm.

FIG. 7 shows a cross section of another insulating glazing according to the invention with a spacer according to the invention I. The insulating glass corresponds in the basic features of in FIG. 6 shown insulating glazing. The side edges 7 of the groove 6 are curved inward in the direction of the third disc 15. The side edges 7 have a spring action and stabilize the third disc 15 stress-free in the groove. Below the groove 6, a web 20 is attached. The web 20 is used inter alia during the production of insulating glass to stabilize the spacer with integrated third disc. The height b of the bridge is 4.5 mm and the width a of the bridge is 3 mm. The web 20 is designed as a T-shaped profile. The two side arms 26 of the web 20 increase the stability of the spacer I, since the bonding surface with the outer surface 4 is increased. The web 20 is made of styrene acrylonitrile (SAN) with 30% glass fiber content. The web 20 divides the outer pane clearance into a first outer pane clearance 24.1 and a second outer pane clearance 24.2. The edge of the first disc 21, the edge of the second disc 22 and the edge of the web 23 are arranged at a height. The outer pane interspaces 24.1 and 24.2 are filled with an organic polysulfide 16. The web 20 divides the outer seal 16 into two parts.

LIST OF REFERENCE NUMBERS

I

spacer

1

body

2

Pulley contact surfaces

2.1

first disc contact surface

2.2

second disc contact surface

3

Glazing interior surfaces

3.1

first glazed interior space

3.2

second glazed interior space

4

outer surface

5

hollow chambers

5.1

first hollow chamber

5.2

second hollow chamber

6

groove

7

Side flanks of the groove

8th

openings

9

inlay

10

poetry

11

desiccant

12

Bottom surface of the groove

13

first disc

14

second disc

15

third disc

16

outer seal

17

inner pane spaces

17.1

first inner pane space

17.2

second inner pane space

18

seam

20

web

21

Edge of the first disc

22

Edge of the second disc

23

Edge of the bridge

24

outer pane spaces

24.1

first outer pane space

24.2

second outer pane space

a

Width of the bridge

b

Height of the jetty

d

Wall thickness of the body

d _B

Wall thickness of the base body in the region of the bottom surface of the groove

Claims (14)

Spacer (I) for insulating glazings at least comprising a base body (1) with a wall thickness d comprising a first disc contact surface (2.1) and a second disc contact surface (2.2) extending parallel thereto, a first glazing interior surface (3.1), a second glazing interior surface (3.2) Outer surface (4), a first hollow chamber (5.1) and a second hollow chamber (5.2),
in which - A groove (6) for receiving a disc parallel to the first disc contact surface (2.1) and second disc contact surface (2.2) between the first glazing interior surface (3.1) and the second glazing interior surface (3.2), the first hollow chamber (5.1) adjoins the first glazing interior surface (3.1) and the second hollow chamber (5.2) adjoins the second glazing interior surface (3.2), - The side edges (7) of the groove (6) from the walls of the first hollow chamber (5.1) and the second hollow chamber (5.2) are formed and - The main body (1) consists essentially of metal. Spacer (I) according to claim 1, wherein the base body (1) is produced by roll forming, preferably produced in a cold rolling process. The insulating glass spacer (I) according to claim 1 or 2, wherein the bottom surface of the groove (12) is adjacent to the outer surface (4) of the base body. Spacer (I) for insulating glazings according to one of claims 1 to 3, wherein in the region of the bottom surface of the groove (12), the wall thickness d _B is increased compared to the wall thickness d of the base body (1), preferably d _B at least 2d and d _B at most 4d, particularly preferably the wall thickness d _{B is} exactly 2d. Spacer (I) for insulating glazings according to one of claims 1 to 4, wherein below the groove (6) on the outer surface (4), a web (20) is arranged. Spacer (I) for insulating glazings according to one of claims 1 to 5, wherein the base body (1) contains or substantially consists of aluminum and / or stainless steel. Spacer (I) for insulating glazings according to one of claims 1 to 6, wherein the base body (1) contains or consists essentially of an aluminum alloy or a stainless steel alloy. Spacer (I) according to one of claims 1 to 7, wherein the base body (1) consists essentially of an aluminum alloy having a thermal conductivity of at most 160 W / (m K). Spacer (I) for insulating glazings according to one of claims 1 to 8, wherein in the groove (6) is a gas-permeable liner (9) is included or at least two deposits (9) are arranged at a distance of at least 1 mm to each other. A spacer (I) for insulating glazings according to claim 9, wherein the insert (9) contains a butyl sealant. The insulating glazing spacer (I) according to any one of claims 9 or 10, wherein the insert (9) comprises a thermoplastic elastomer, preferably a urethane-based thermoplastic elastomer (TPU). Insulating glazing comprising at least a first pane (13), a second pane (14), a third pane (15), a first inner pane space (17.1) between the first pane (13) and the third pane (15), a second inner pane space (17.2 ) between the third disc (15) and the second disc (14) and a circumferential spacer (I) according to one of claims 1 to 11, wherein - The first disc (13) on the first disc contact surface (2.1) is present, - The second disc (14) on the second disc contact surface (2.2) is present, - The third disc (15) in the groove (6) of the spacer (I) is inserted. A method for producing an insulating glazing according to claim 12, wherein at least a) the base body (1) is provided, b) the third disc (15) is inserted into the groove (6) of the spacer (I), c) the first disc (13) is mounted on the first disc contact surface (2.1) of the spacer (I), d) the second disc (14) on the second disc contact surface (2.2) of the spacer (I) is mounted and e) the disc assembly of the discs (13, 14, 15) and the spacer (I) is pressed together. Use of a spacer (I) according to one of claims 1 to 11 in multiple glazings, preferably in insulating glazings, particularly preferably in triple insulating glazings.

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