DE202018106224U1 - facade element - Google Patents

Abstract

Facade element (100) with a first glass unit (1), in particular insulating glass unit, and at least one adjacent thereto second glass unit (2), in particular insulating glass unit, wherein the two glass units (1, 2) via their adjoining edges in a joint area preferably exclusively with the help a particularly glass-clear adhesive connection (3) are interconnected, wherein the adhesive connection (3) is preferably formed by a two-component silicone material (4).

Description

The present invention relates to a facade element with a first glass unit, in particular insulating glass unit, and a second glass unit arranged adjacent thereto, in particular insulating glass unit.

An insulating glass unit, sometimes referred to as a multi-glazing unit, is useful for increasing the thermal insulation and sound insulation of the interior of buildings and therefore serves to increase the comfort to the occupants of the building as compared to a weak insulation provided by ordinary simple glazing units is created. Simple double-glazing units are formed by two surface elements, in particular disc-glass-like material, which are held and fixed at a distance to each other in the usual way at their ends by a spacer. The spacer is usually a metal profile adhered to the discs along the length of their four edges.

A hermetically sealed cavity is formed between the disks and bounded by the spacer. This cavity is filled with a dry gas, such as dry air. It is important that the gas confined within the disc space be maintained in a dry state to avoid any condensation of water inside the double glazing during temperature changes. If water vapor appears on the inner walls of the disk condensation, the transparency of the glazing is affected.

In multiple glazing units, it is also known to provide a resin rim which extends at least between the spacer and each of the surface elements to hold the surface elements in place. Ordinarily, the unit is mounted in a frame of cross-sectionally U-shaped profile in which the edges of the surface elements are held. This frame is then mounted on a support structure, for example in the opening of the wall of a building.

In the area of building facades, more and more emphasis is placed on the aesthetics of the installed elements as well as on the overall aesthetics of the building. There is a demand for large-scale glass facades, particularly in the case of building complexes of large companies or shops. Large-scale glass facades are usually composed of several elements of an insulating glass unit.

In order to meet the required conditions in the field of building insulation and thus to keep the costs of heating and for the use of air conditioning in limits, the insulating glass units are composed of several glass sheets. For better thermal insulation, the space between the panes, i. the space between the surface elements, be filled with a gas with low thermal conductivity.

To generate the interior, the surface elements are connected via spacers in particular via the combination of different spacers, and sealing means gas-tight together. The seal between the spacers and the glass sheets, and in particular the sealing of the joint area of two spacers, is of central importance for the generation of the gas-tight interior.

In large-scale glass facades, however, a durable and secure seal between the spacers and the glass sheets and in particular the sealing of the joint area of two spacers is problematic due to the size of the surface elements. This is not least because in the case of large-area multiple glazing units, the forces acting on the seal and the spacer are relatively large.

The invention has for its object to provide a facade element, in particular a building facade element, which is suitable for use in a large-scale glass facade, and in which the known problems of sealing the space between the pan no longer occur.

In addition, a corresponding method for producing such a facade element is to be specified.

With regard to the facade element, the object underlying the invention is achieved by the subject matter of independent claim 1, wherein advantageous developments of the facade element according to the invention are specified in the corresponding subclaims.

Accordingly, the invention particularly relates to a facade element with a first glass unit, in particular insulating glass unit and a second glass unit, in particular insulating glass unit arranged adjacent thereto, wherein the two glass units are preferably connected to one another via their adjoining edges in a joint area exclusively with the aid of an adhesive bond, wherein the adhesive bond is formed in particular by a preferably crystal-clear two-component silicone material.

Due to the fact that, in accordance with the invention, the glass units are glued together in their joint area with the aid of a silicone material, it is possible to dispense with corresponding profile arrangements, in particular U-shaped profile arrangements, for mutually connecting the two adjacent glass units. As a result, the impact area can be formed much less noticeable.

However, the invention offers even more surprising advantages. Because the adhesive bond is formed, in particular, by a two-component silicone material, it is possible to confine the joint region for bonding the two glass units and thus define a joint region into which the silicone material can be introduced in liquid form, in particular cast or injected.

The introduction of the silicone material in liquid form has the decisive advantage that the adhesive connection can be formed bubble-free. This, in turn, makes it possible to use a two-component silicone material for the silicone material, which is particularly clear after curing.

With this embodiment, the actual impact area, i. the joint region between the two adjoining and adjacent glass units preferably carried out completely transparent, so that the normally opaque running in the art joint area now optically no longer noticeable.

In other words, the solution according to the invention makes it possible to form a large-scale facade element, which gives a monolithic and especially perfect transparent impression, but which is composed of several elements of the insulating glass units, the sealing of the space between the panes of the individual insulating glass units due to their relatively small size no Can cause problems. The use of clear spacers and a crystal-clear, preferably two-component silicone material as an adhesive connection prevents unwanted optical impairments in the transition region of the elements, so that the facade element - although it is formed from a plurality of individual insulating glass units - still shows no impairment of the overall visual appearance.

The individual insulating glass units can preferably be removed or exchanged individually from the facade element, which is necessary, for example, when an insulating glass unit of the facade element should be damaged.

The solution according to the invention is particularly suitable in connection with glass units, which are each formed as insulating glass units and preferably have at least a first transparent surface element preferably in the form of a glass pane and at least a second transparent surface element in the form of a glass pane, wherein the two surface elements of each as Insulating glass unit formed glass unit, including a disc space are connected to each other via a preferably circumferential spacer. Advantageously, the spacer of the first and / or second insulating glass unit is formed from a crystal-clear material, in particular a glass material or a corresponding plastic material.

In this way, the transition region between the two adjoining glass units is virtually no longer visually recognizable. In other words, the surface element, which is composed of a plurality of glass units, in particular insulating glass units, gives the visual impression of a monolithic surface element, i. a surface element without abutting areas between adjacent individual insulating glass units.

It is advantageous if the spacer of the first and / or second insulating glass unit is made of a crystal-clear material and in particular is made of several parts in order to realize a total circumferential spacers as simple as possible. Furthermore, it is advantageous if between the spacer of the first and / or second insulating glass unit and the first and second surface element of the corresponding insulating glass unit, a sealing means is provided, which is preferably also made crystal clear.

The solution according to the invention thus makes it possible to provide relatively large facade elements which optically define a maximum see-through range, in particular without disturbing optically non-transparent impact areas, although the surface element is constructed from a plurality of individual insulating glass units or glass units. The usual problems that occur in large-scale facade elements, such as the thermally induced bending (bimetal effect), the barometric effect, the internal condensation within an air gap, etc. no longer occur in the facade element according to the invention, since these problems are typical of large area elements.

The invention will be described in more detail below with reference to the accompanying drawings.

• 1 schematisch in einer teilgeschnittenen Ansicht der Fugenbereich zwischen zwei Glaseinheiten während des Einbringens eines Silikonmaterials; und
• 2 schematisch und in einer isometrischen Ansicht den Stoßbereich zwischen zwei aneinander angrenzenden Glaseinheiten beim Einbringen eines Silikonmaterials in den festgelegten Fugenbereich.

Show it:

• 1 schematically in a partially sectioned view of the joint area between two glass units during the introduction of a silicone material; and
• 2 schematically and in an isometric view of the impact area between two adjoining glass units when introducing a silicone material in the specified joint area.

Silicon grouting and silicone bonding on façade glass are currently only carried out when installed. Since this process makes a pasty state of the silicone material required, so far no pourable silicone type is provided for such an application in construction.

The introduction of pasty material into glass joints is no longer possible bubble free from joint depths that go beyond 10 to 15 mm, by standard construction site processing. This circumstance therefore additionally requires a corresponding procedure to hide these bubbles or small gaps. This means that the later visible glass edges for this reason are usually printed before, or with a thin layer of silicone in the factory already bubble-free precoated (trowelled) must be.

It follows, however, that with such a procedure with a clear, pasty material visually unsightly visible bubbles would remain visible. These bubbles can not be seen until now through the use of through-dyed material.

The use of through-dyed silicone as jointing or bonding material has so far also been completely sufficient, since the use of the standard edge seal alone has not made it possible to see through a massive object on the glass edges of the insulating glass.

However, a facade element 100 indicate with the largest possible transparent and optically transparent range, the conventional approach and the use of solid-colored silicone material can no longer be used. In particular, according to the embodiments exemplified in the drawings, a facade element is used 100 provided, which despite providing a plurality of adjacently arranged insulating glass units 1 . 2 offers a maximum possible viewing area.

These are the insulating glass units 1 . 2 , which for the formation of the facade element according to the invention 100 be connected together in a joint area, specially constructed. In detail, the insulating glass units 1 . 2 in each case at least one first transparent surface element 11 preferably in the form of a glass pane and at least one second transparent area element twelve also preferably in the form of a glass pane. The two surface elements 11 . twelve are over a preferably circumferential spacer 13 including a disc space 14 connected with each other.

It is provided in particular in the exemplary embodiments illustrated in the drawings that the spacer 13 the first and second insulating glass units 1 . 2 is formed in each case from a crystal-clear material, in particular glass material or a corresponding plastic material.

Furthermore, it is advantageously provided that between the spacer 13 and the first and second surface elements 11 . twelve the corresponding insulating glass unit 1 . 2 a preferably crystal clear sealant 15 is provided.

In other words, there are insulating glass units 1 . 2 for use, the edge region of which is formed from a crystal-clear material or from crystal-clear materials, so that even the edge region provides no visual impairment in terms of transparency.

To the so completely transparent trained insulating glass units 1 . 2 be able to connect to each other, the glass units 1 . 2 arranged to each other such that the two glass units 1 . 2 in an abutting area with their edges adjacent to each other. In this position, the glass units 1 . 2 preferably temporarily fixed and then the impact area is limited to a joint area 5 set.

After that, a silicone material 4 , in particular a crystal-clear silicone material 4 , in liquid form in the specified joint area 5 introduced, in particular cast or - as in 1 indicated - by means of an injection process in the specified joint area 5 injected.

Because of that, the silicone material 4 in liquid form in the specified joint area 5 is a secure, durable, crystal-clear and bubble-free connection between the two adjacent glass units 1 . 2 possible, even with a complex glass structure, such as in insulating glass units 1 . 2 with glass spacers 13 , which are to be connected to each other, for example, on a corner (cf. 2 ).

The introduction of the silicone material 4 in liquid form allows a clean flow to the joint surfaces and the rise of possibly introduced bubbles to the surface. Since this pourable material is then to react free of shrinkage and completely, the use of two-component material is required for this.

A silicone material suitable for crystal clear potting 4 For example, the two-component, clear, pourable silicone sold by Dow Corning under the designation "Sylgard 184". A comparable product would also be, for example, the product Elastosil Solar 2202 AB of the company Wacker.

Advantageously, the silicone materials should 4 have a viscosity of about 1 Pa x second to about 3.5 Pa x second to allow the specified joint area 5 made of the silicone material 4 is completed.

To limit the impact area and to fix it with the liquid silicone material 4 fill in the joint area 5 Different approaches can be used. A possible variant would be to set up a prefabricated, for example, milled or drawn form, which is sealed and held by, for example, bonding from the outside of the glass. As a result, a predefined joint shape, such as a defined radius or a precise surface, can be generated for visual enhancement. This joint shape may consist of Teflon. Alternatively, another material provided with a release agent is to adhere the silicone material 4 to prevent, conceivable.

A simpler method of achieving a containment of the joint to be cast would be, for example, if the mold is enclosed by means of a self-adhesive tape glued to the glass edges. This tape can locally have an adhesion-preventing strip along the joint.

In order to protect the glass edges of the filling side against unwanted wetting, the edge region of the filling point is advantageously covered with an adhesive tape. Thereafter, the material mixed ready for pouring is slowly and evenly introduced into the area to be filled.

The aim is a flow rate of about 10 ml / s to about 40 ml / s, depending on the joint thickness and viscosity of the silicone material 4 , The removal of excess material and leveling of the potting surface must be completed before the start of the curing process to allow flow into a perfectly flat surface.

This "open" filling process should, for example, be carried out for the pre-bonding of a glass corner formation in a clean room under conditioned conditions in order to prevent the inclusion of dust or other dirt particles (cf. 2 ).

An improved blending method would be to close the entire joint from both sides with a fitting or a limiting band. This joint space could then be filled by injection of the premixed silicone potting material. This method makes it possible to optimize the filling of the grouting, which is otherwise only required in an open process in a horizontal manner, into a filling of the joint in the finished glazed building which is possible up to the vertical arrangement. The mentioned injection method also requires a somewhat more elaborate preparation, such as the secure sealing and the use of mixing or dosing equipment required.

By this invention, a crystal clear connection along the entire façade front of fully transparent composite and insulating glass can be produced which has no disturbing visible joints more throughout.

In addition, for the first time a usable glass clear connection of a corner glazing can be produced. Because the key advantage of this corner joint is the lasting elasticity of the joint. The completely reacted bonding material has a degree of hardness of approx. 35 to 65 to Shore A according to DIN ISO 7619-1, which corresponds to a converted pressure modulus of 3.5 to 8 MPa.

This elasticity at a corner joint of glasses allows adaptation to mounting tolerances of the substructure when installing the prefabricated glass corner on the building. An additional advantage of this permanent flexible corner joint is the ability to permanently absorb deformations of the substructure by wind loads or building settlements.

LIST OF REFERENCE NUMBERS

1

first glass unit

2

second glass unit

3

adhesive bond

4

silicone material

5

joint area

11

first surface element

12

second surface element

13

spacer

14

Disk space

15

sealant

100

facade element

Claims (8)

Facade element (100) with a first glass unit (1), in particular insulating glass unit, and at least one adjacent thereto second glass unit (2), in particular insulating glass unit, wherein the two glass units (1, 2) via their adjoining edges in a joint area preferably exclusively with the help a particularly glass-clear adhesive connection (3) are interconnected, wherein the adhesive connection (3) is preferably formed by a two-component silicone material (4). Façade element (100) after Claim 1 , wherein the adhesive bond (3) is gas bubble-free, and wherein the preferably two-component silicone material (4) is crystal clear, especially after curing. Façade element (100) after Claim 1 or 2 wherein the first and second glass unit (1, 2) are each formed as an insulating glass unit, each having at least a first transparent surface element (11) preferably in the form of a glass sheet and at least a second transparent surface element (12) also preferably in the form of a glass sheet, wherein preferably in two glass units, the two surface elements (11, 12) via a preferably circumferential spacer (13), including a disc space (14) are interconnected. Façade element (100) after Claim 3 , wherein the spacer (13) of the first and / or second insulating glass unit (1, 2) made of a clear material, in particular glass material or plastic material is formed. Façade element (100) after Claim 3 or 4 , wherein the spacer (13) of the first and / or second insulating glass unit (1, 2) is made of several parts. Facade element (100) according to one of Claims 3 to 5 , wherein between the spacer (13) of the first and / or second insulating glass unit (1, 2) and the first and second surface element (11, 12) of the corresponding insulating glass unit (1, 2), a sealing means (15) is provided, which is preferably clear is. Facade element (100) according to one of Claims 1 to 6 , wherein the facade element (100) has a plurality of glass units (1, 2), which are preferably connected to each other exclusively by means of the particular glass-clear adhesive connection (3) such that a large-area and transparent facade element (100) is formed. Façade element (100) after Claim 7 , wherein the individual glass units (1, 2) are made interchangeable.

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