DE10039980A1 - Hollow insulation strip with foamed plastic - Google Patents

Abstract

An insulation strip for composite profiles (12, 14) comprises anchoring areas (18) for positive locking in correspondingly shaped receiving areas (16) in the inner profile (14) and outer profile (12) and at least one cavity (22; 22a, 22b) with at least one filling opening ( 24; 24a, 24b) which is filled with a foamed plastic (26; 26a, 26b); wherein the wall (20; 20a, 20b, 20c) of the insulating strip (10) surrounding the at least one cavity (22; 22a, 22b) has attachment areas (28; 28a, 28b, 28c, 28d, 28e) which are located in the respective one Extend cavity (22; 22a, 22b) and are shaped so that they extend positively into the foamed plastic (26; 26a, 26b).

Description

Field of the Invention

The invention relates to an insulation strip for composite profiles, in particular metal-plastic composite profiles, with at least a cavity filled with a foamed plastic is.

State of the art

Insulation strips are used for the formation of composite profiles in Area of facade construction or for the training of Used frames of windows and doors. For composite profiles one strives to minimize heat transfer between the outward and the inward Allow areas of a frame. This is guaranteed by the necessary for reasons of strength used inner and outer profiles made of metal Insulation strips made of a material with less Thermal conductivity can be combined. Dämmleisten are on their outer contour with anchoring areas equipped, for example with dovetail-shaped Areas or similar, so that they are in a respective Retaining contour of a metal profile can be inserted and in a direction perpendicular to its longitudinal extension in the Retaining contour are anchored. Thus, such Plastic insulation strips that connect at least two  Metal profiles are used for thermal separation between Inner profile and outer profile.

DE 195 13 836 A1 is a window or door profile shown, the usual design of composite profiles exists, whose inner profile and outer profile by insulation strips are interconnected. An insulation strip, the same time serves as a center seal, consists of a hard shell Plastic hollow body, the cavity with a foam is filled out. This measure will satisfactory thermal insulation achieved.

In the composite profile shown in DE 32 27 599 A1, especially for frames of windows, doors and Facade elements are insulation strips between the inner profile and External profile shown, one with foamed plastic can have filled cavity. This measure serves in addition, the thermal conductivity of the insulation strip as low as to make possible.

In the solutions in the prior art, use is used of foamed plastic in insulation strips of improvement thermal insulation. Only EP 0978 619 A2 mentioned generally the use of an insulation strip in one Composite profile that this sufficient stability gives.

Presentation of the invention

The invention has for its object to an insulation strip create, both in terms of insulation and in Has improved properties in terms of rigidity.

This task is carried out by an insulation strip with the characteristics of claim 1 solved.  

The invention is based on the idea that the wall of the Insulation strip, which the at least one with foamed Plastic-filled cavity surrounds with attachment areas too provided, which are in the bounded by the wall Extend cavity and shaped so that they are positively into the foamed plastic extend. In other words protrude from one foamed cavity surrounding inner wall one or more Neck areas into the cavity, the one positive connection between the attachment areas and the plastic foam. This is achieved by broadest sense of foam from every neck area is encompassed in some areas, whereby in particular the Transverse stiffness of the insulation strip thanks to the firm bond between the surrounding wall parts and the foamed Plastic is increased. In this way, the foamed bears Plastic not only improves insulation, but also to improve the rigidity.

Preferred embodiments are defined by the remaining claims characterized. According to a preferred embodiment of the Invention areas broaden with growing Distance from the cavity facing Inner surface of the wall. This measure represents a very is an easy way to establish a positive connection between the the wall surrounding the cavity with its attachment area and to manufacture the foamed plastic.

The attachment areas preferably have a T-shaped shape Cross-sectional shape. By forming a T shape creates a very effective form fit, because a Relative movement between the foam material and the walls of the cavity in two axial directions at the same time is prevented.

According to an alternative embodiment, the Neck areas have an L-shaped cross-sectional shape,  the angled leg is the form fit by the reaching around the plastic foam.

According to a preferred embodiment of the invention the insulation strip has several filling openings along the The length of the insulation strip is provided in a regular arrangement are. The filling openings serve to introduce the Starting materials for the foaming of the cavities. You can but also improve thermal insulation at the same time, provided they are arranged in a wall that is in the Extends essentially parallel to the heat flow direction because in this case a labyrinth effect through the filling openings is generated that for the heat flow between inside and External profile available heat transfer path extended.

According to a preferred embodiment of the invention the insulation strip has two cavities which are separated by a Partition running in the longitudinal direction of the insulation strip are separated from each other, the partition wall openings can have, which the two cavities with each other combines. In this embodiment, the approach areas are mutually opposite walls, so to speak extended that they touch each other or in one piece are interconnected. This measure allows increase the stability of the insulation strip.

According to a preferred embodiment of the invention the cavity is in the form of a gutter. It is therefore only one only fill opening provided, which extends over the entire Length extends. In this case, the cavity is one-sided open.

Brief description of the drawings

The invention is explained below purely by way of example using the attached figures, in which:  

Fig. 1 shows a sectional view perpendicular to the longitudinal extent of an insulation strip according to the invention in a composite profile;

Fig. 2 is a schematic three-dimensional view of an insulating strip to the invention;

Fig. 3 to 5 show sectional views of alternative embodiments of inventive Dämmleisten;

Figures 6a, 6b and 6c alternative embodiments of the area shown in Figure 5 with detail A..;

Figure 7 illustrates a further alternative embodiment of an insulating strip with two cavities.

Fig. 7a shows the area shown with detail A in Figure 7 in an alternative embodiment.

Fig. 8 illustrates an alternative embodiment of an insulating strip having interconnected cavities; and

Fig. 9 is a sectional view of another embodiment of an insulating strip according to the invention.

Ways of Carrying Out the Invention

Different in the following illustrations Embodiments of the invention are each identical or corresponding elements with the same Designated reference numbers.

Fig. 1 shows a first embodiment of an insulating strip 10 of the invention, the inner profile 14 is attached between an outer profile 12 as well. The outer profile 12 and the inner profile 14 are shown in the embodiment according to FIG. 1 purely by way of example and are in no way restricted to the illustrated geometry for the execution and also the understanding of the invention. In the exemplary embodiment shown in FIG. 1, the inner and outer profiles are roll-formed from metal, wherein receiving areas 16 in the outer profile 12 and also the inner profile 14 serve to accommodate appropriately shaped anchoring areas 18 of the insulating strip.

The insulation strip 10 comprises anchoring areas 18 as well as walls 20 which surround at least one cavity 22 (see, for example, FIG. 2). The walls and anchoring areas of the insulating strip are made of plastic, preferably PVC, PA, ABS with and without fiber reinforcement. As can be seen from the illustration in FIG. 1, the anchoring areas are shaped in such a way that they can be brought into positive contact with the receiving areas 16 by the receiving areas 16 enclosing the anchoring areas 18 . The exact design of the anchoring areas 18 is not essential for the invention. Therefore, a different geometry can also be selected instead of the “two-fingered” configuration of the anchoring regions 18 shown in FIG. 1. The geometry of the anchoring areas shown in FIG. 1 is only used to fix the anchoring areas 18 of the insulating strip in the receiving areas by providing notches in the receiving areas, which are not shown in FIG ,

In the cavity 22 of the insulation strip 10 there is a foamed plastic with a porous or cellular structure. For example, PUR, melamine resin, PA or polyethylene terephthalate can be used as a suitable plastic. The plastic is introduced into the cavity 22 through one or more filling openings 24 , so that after the plastic is foamed, the foam material 26 fills the entire cavity 22 . The foam leads to an improvement in the insulation of the insulation strip 10 . In order to further increase the rigidity of the insulation strip, in particular when a force shown by the arrow F in FIG. 1 acts in the transverse direction, attachment areas 28 are formed on the walls of the insulation strip, each of which extends from the walls into the cavity. As will become clear from the explanation of the various embodiments of the invention, a large number of different possibilities are conceivable, where on the one hand the attachment areas 28 are provided on the walls and on the other hand which geometry they each have. In the embodiment shown in FIG. 1, attachment areas are provided for this purpose, which flank the filling opening 24 and extend perpendicularly from the corresponding wall 20 into the interior of the cavity. In addition, attachment areas are also provided on those walls which run parallel to the heat flow direction Q, which have a T-shaped cross section and likewise extend from the corresponding wall into the cavity. Providing the attachment areas encompasses the foam material 26 in some areas, so that a relative movement between the foam material 26 and the surrounding wall is prevented. This enables a significant improvement in the rigidity of the entire insulation strip.

In addition to the shape of the walls with the attachment areas described above, the rigidity of the insulation strip is of course also dependent on the foam material used, so that a suitable foam material is selected depending on the desired properties with regard to thermal insulation or behavior in the event of fire or also the strength can. In the embodiment of the invention shown in FIG. 2, attachment areas 28 are provided on all walls 20 of the insulation element 10 , each of which has a T-shaped cross section. In addition, it can be seen from FIG. 2 that the anchoring regions 18 are dovetail-shaped and made from a full profile. Finally, FIG. 2 shows a possible embodiment in relation to the arrangement of a plurality of filling openings 24 a, 24 b etc. in the longitudinal direction of the insulation strip 10 . By providing a large number of filling openings, the insulating strip can be foamed out very evenly. In the embodiment according to FIG. 2, the filling opening is also provided in a wall of the insulating strip, which runs transversely to the heat flow direction Q.

An alternative embodiment of the invention is shown in FIG. 3. The insulation strip 10 shown here has only in the wall area flanking the filler neck areas 28 a, which extend in the filling direction A, as well as neck areas 28 b, which are provided on the opposite wall and also only form a web running perpendicular to the corresponding wall 20 . In the very simple embodiment of the attachment areas 28 a, 28 b shown in FIG. 3, the stiffness can be increased by the form-fit between the attachment areas and the foam 26, but the foam will grip around preventing a relative movement between the foam material and the surrounding wall only in a direction perpendicular to the heat flow direction Q, while in a direction perpendicular to this, ie parallel to the heat flow direction and parallel to the insertion direction A, the embodiment according to FIG. 3 does not yet provide optimal results. However, the achievement of a high transverse rigidity is the most important measure, which is also achieved with the embodiment according to FIG. 3.

In the embodiment according to FIG. 4, the foam material is gripped at least in some areas in all main directions by providing T-shaped attachment areas 28 a on three walls of the insulating strip. A relative movement of the foam material 26 in the direction of arrow B is therefore no longer possible.

The embodiment according to FIG. 5 differs from the previous embodiments in that an intermediate wall 30 is provided which delimits two mutually separate cavities in the insulation strip 10 . For this purpose, the intermediate wall 30 shown in FIG. 5 runs in the longitudinal direction of the insulation strip 10 . Each cavity is generally continuously open, but can also have one or more fill openings 24 a, 24 b. In the embodiment of Fig. 5, two foam bodies 26 a and 26 b in the insulating strip is formed. The embodiment of the attachment areas 28 according to FIG. 5 is shown in the simplest variant in the example shown, in which the attachment areas 28 are each formed in the longitudinal direction along the respective filling openings 24 , 24 b and are only perpendicular to the respective wall with a single leg stretch into the cavity. From the illustrations of Figs. 6a, 6b and 6c, however, it is clear that different geometries are possible for the boss portion 28, as the a, shown in Fig 6b. Shown, L-shaped in Fig. 6a, T-shaped attachment area 28 shown Neck area 28 c and the neck area 28 d shown in FIG. 6 c, which differs from the L-shaped neck area 28 c only in that the two legs do not form a right angle to one another.

FIG. 7 shows an alternative embodiment of the invention, in which there is no final wall in the space arranged below in the drawing plane, so that it is not a cavity in the strict sense. Therefore, in the context of the invention, the term hollow space is to be interpreted at least sufficiently that a gutter-shaped space or a space with a trough-shaped cross section is also understood, which is limited at least by the attachment areas 28 a shown in FIG. 7 with regard to its opening cross section ,

Also the embodiments according to FIGS. 5, 8 and 9, a one-sided open cavity may, in a modified embodiment have.

The embodiment according to FIG. 7 thus corresponds with respect to the upper cavity or foam body 26 a to the embodiment according to FIG. 6 b, while in the foam body 26 b shown below the attachment areas 28 a are foamed in and the filling opening extends over the entire area between the extends parallel to the heat flow direction arranged wall parts 20 a and 20 b. As an alternative embodiment of the attachment area 28 a, a detailed view A is also shown in FIG. 7 a, in which an attachment area 28 e is shown, the cross section of which widens in the shape of a club with increasing distance from the outgoing wall 20 .

FIG. 8 shows an embodiment in which two cavities are also provided. As is clear from the sectional view, the wall 20 c shown below in the drawing plane of FIG. 8 is closed. In order to be able to foam the cavity 22 b, openings 32 are therefore provided in the intermediate wall 30 . The openings 32 can be perforated and arranged in a regular sequence in the longitudinal direction of the insulation strip 10 . Through the openings 32 the introduced in the filling direction A foam material enters b into the cavity 22 and there is also foam from a foam integral with the body 26 a formed foam body 26th Since the embodiment according to FIG. 8 is ultimately only a single foam body, the parts of the intermediate wall 30 interrupted by the openings 32 thus act in an analogous manner to the attachment areas discussed in the two preceding embodiments, or those shown in FIG Attachment areas 28 surrounding the filling opening.

Finally, FIG. 9 shows a further embodiment of the invention, in which the wall 20 c is provided with slots 34 continuously. The foam material does not escape through the slots when foaming, but the heat conduction in the main heat flow direction Q is reduced by this measure, so that the insulation properties can be improved while the insulation strip 10 remains stable.

All of the embodiments have in common that by the provision a positive connection between the surrounding Wall parts of the insulation strip and that in a cavity foam material not only the insulation properties, but also the rigidity of the insulation strip, especially in Transverse direction, is improved.

Claims (7)

1. Insulating lowest for composite profiles ( 12 , 14 ), comprising:
Anchoring areas ( 18 ) for positive reception in correspondingly shaped receiving areas ( 16 ) in the inner profile ( 14 ) and outer profile ( 12 ); and
at least one cavity ( 22 ; 22 a, 22 b) with at least one filling opening ( 24 ; 24 a, 24 b) which is filled with a foamed plastic ( 26 ; 26 a, 26 b); in which
the wall ( 20 ; 20 a, 20 b, 20 c) surrounding the at least one cavity ( 22 ; 22 a, 22 b) of the insulating strip ( 10 ) attachment areas ( 28 ; 28 a, 28 b, 28 c, 28 d, 28 e) has, which extend into the relevant cavity ( 22 ; 22 a, 22 b) and are shaped such that they extend into the foamed plastic ( 26 ; 26 a, 26 b) in a form-fitting manner. 2. Insulation strip according to claim 1, characterized in that the attachment areas ( 28 ; 28 a, 28 b, 28 c, 28 d, 28 e) face with increasing distance from the cavity in question ( 22 , 22 a, 22 b) Widen the inner surface of the wall ( 20 ; 20 a, 20 b, 20 c). 3. Insulation strip according to claim 2, characterized in that at least one of the attachment areas ( 22 a) has a T-shaped cross-sectional shape. 4. Insulation strip according to claim 1 or 2, characterized in that at least one of the attachment areas ( 28 c; 28 d) has an L-shaped cross-sectional shape. 5. Insulation strip according to one of the preceding claims, further comprising a plurality of filling openings ( 24 ; 24 a, 24 b), which are provided along the length of the insulation strip ( 10 ), preferably in a regular arrangement. 6. Insulating strip according to any one of the preceding claims, characterized in that two cavities (22 a, 22 b) are provided which are separated from each other by an axis extending in the longitudinal direction of the insulating strip partition wall (30), said partition wall (30) apertures (32 ) which connects the two cavities ( 22 a, 22 b) with each other. 7. Insulation strip according to one of the preceding claims, characterized in that the cavity is in the form of a Channel.