DE3407121A1 - Composite profile, in particular for frames of windows, doors and facade elements - Google Patents

Abstract

The invention relates to a composite profile, in particular for frames of windows, doors and facade elements, with a metal inner part, a metal outer part and at least one plastic insulating web joining these parts together while forming a thermal insulation bridge. In order in a profile of this type to produce a shear-resistant connection between the insulating webs and the inner and outer parts, it is provided for the insulating web to be joined to the inner and outer parts at its edge regions facing the inner and outer parts via a metal web having roughness in the form of depressions and/or elevations and for the plastic forming the insulation web to penetrate in a form-fitting manner into the depressions and/or to enclose in a form-fitting manner the elevations of the metal web.

Description

Description:

Composite profile, in particular for frames of windows, doors and facade elements The invention relates to a composite profile, in particular for frames of windows, Doors and facade elements, with a metallic inner part, a metallic one Outer part and at least one of these parts with the formation of a thermal insulation bridge interconnecting insulating bar made of plastic, the insulating bar at its The edge areas facing the inner and outer parts form-fit with metal bars is connected and the metal webs with their free edges in grooves of the inner and Engage outer parts.

In a known composite profile of this type (DE-OS 32 23 343) takes place the positive connection of the insulating bar with the metal bars in that the plastic forming the insulating bar penetrates through openings in the metal bar.

Since such perforated metal webs in production are relatively are expensive, it is the object of the invention to make the metal webs longitudinally shear-proof in another way to connect with the insulating bar.

The object is achieved according to the invention in that the metal webs roughness in the form of depressions on their surfaces connected to the insulating web and / or have elevations and the plastic forming the insulating web into the Depressions and elevations of the metal web penetrate positively or they positively encloses.

It was found, surprisingly, that roughness in the form of depressions and / or elevations a form fit that is resistant to longitudinal shear between the metal bars and the plastic of the insulating bar results, all of which are provided Requirements met without the need for continuous plastic bridges the metal bars were required through it.

The following description of preferred embodiments of the invention serves for further explanation in connection with the accompanying drawing. Show it: 1 shows a cross-sectional view of a composite profile; Fig. 1a is a side view a metal web; Fig. 1b enlarged partial cross-sectional views and 1c of the connection area between the metal web and an insulating web; Fig. 2 partial cross-sectional views of further up to 4 embodiments of composite profiles.

As can be seen from Fig. 1, there is a composite profile from which Frames of windows, doors, facade elements or the like can be produced, from a metallic inner part 1 and a metallic outer part 2, which by two insulating bars 3, 4 are connected to one another in a heat-insulating manner. The composite profile extends uniformly perpendicularly with the cross section shown in FIG. 1 to the drawing plane and can have a different length depending on requirements. the Inner and outer parts 1, 2 can be made of aluminum, aluminum alloy, steel or other metal. As a plastic for the production of the insulating bars 3, 4 is particularly suitable polyamide or polyethylene terephthalate, these plastics can also be reinforced by glass fibers or other additives. Cheap it is when the insulating webs 3, 4 made of a plastic of porous or cellular Structure, in particular made of foamed plastic.

As can be seen from Fig. 1, are on the inner and outer parts facing edge regions of the insulating webs 3, 4 metal webs 5 embedded. These Metal bars 5 each have a protruding from the insulating web 3, 4, triangular or dovetail-shaped end 6 in cross-section. A the part 7 of the metal web 5 adjoining this end 6 has depressions 8 (see also Figs. 1a and 1b).

The recesses 8 can be circular or elongated recesses be formed in several rows on the side surfaces of the metal webs 5, optionally also offset from one another, can be arranged. The depressions can also be used as grooves or knurls, preferably parallel to the longitudinal axis the metal webs 5, be formed. Even microscopic indentations in shape smaller or larger surface roughness can serve the desired purpose.

As shown, the plastic forming the insulating webs 3, 4 penetrates into the wells 8, so that in this way the insulating bar with the two Metal webs 5 is immovably connected by positive locking. The penetration of the Insulating webs 3, 4 forming plastic in the recesses 8 in the metal web 5 reached is advantageous in that the insulating webs 3, 4 forming plastic injected onto the metal webs 5 held at a corresponding distance, extruded on, pours or presses on, so that the arrangement shown in FIG. 1 of each two metal bars 5 in one of the insulating bars 3 or 4 results.

Fig. 1c shows a modified embodiment of the connection a metal web 5 with an insulating web 3. The roughness on the metal web, which the intimate connection with the plastic material of the insulating web 3 result, are in contrast to FIG. 1b in FIG. 1c not as depressions, but as elevations 28 in the form of small, circular or elongated knobs or also running lengthways, continuous or interrupted webs. Also in this way results there is a longitudinally shear-proof positive connection between the insulating web 3 and the metal web 5.

As far as elongated to achieve the form-locking connection described If elements (depressions or elevations) are used, they can also be used transversely to the longitudinal axis of the metal web, in particular also designed to run obliquely be.

When connecting the two outer parts 1, 2 to form a composite profile it now only depends on the protruding from the insulating webs 3, 4 To connect the ends 6 of the metal webs 5 firmly to the parts 1, 2. As shown, the two inner and outer parts 1, 2 each have inwardly protruding outer webs 9 and inner webs 11, which each extend over the entire length of the parts 1, 2 extend. In the embodiment shown in FIG. 1, the outer webs 9 have from the outset and unchangeable those from the drawing apparent Cross-sectional shape, while the inner webs 11 initially approximately perpendicular to the parts 1, 2 stick out. After inserting or pushing the respective ends 6 between the Webs 9 and 11, the inner webs 11 are positively bent towards the ends 6, which can be done, for example, by the fact that one of the parts 1, 2 and the insulating webs 3, 4 formed chamber of the composite profile a corresponding Pulls the mandrel through with the application of force. After this "rolling" or "caulking" the inner webs 11 assume the inclined position shown in FIG. As with corresponding force applied two metals almost cohesively on their contact surfaces, d. H. In this way, a practical insoluble connection between the Ends 6 and thus the insulating webs 3 on the one hand and the inner and outer parts 1, 2 of the composite profile on the other hand. The material connection the metal webs 5 with the parts 1, 2 is particularly strong when the metal webs 5 and the parts 1, 2 made of the same metal, for example aluminum or aluminum alloy, exist. In other embodiments of the invention, the ends 6 of the metal webs 5 also by welding or gluing to the inner and outer parts 1, 2 of the Composite profile are connected.

Because of the immovable, form-fitting connection between the insulating bar 3, 4 and metal web 5 on the one hand and the z. B. integral, non-slip connection between the end 6 of the metal webs 5 and the parts 1, 2 of the composite profile on the other hand the overall result is a completely shear-proof connection between the insulating bars 3, 4 and parts 1, 2 of the composite profile.

Fig. 2 shows another embodiment of the invention. Each other Corresponding parts are denoted by the same reference numerals in FIGS. 1 and 2. As shown, in Fig. 2 between the outer and inner web 9 and 11 is a one-piece arranged with the metallic part 2 connected metal web 15, which also Surface roughness in the form of elevations 28 (the depressions 8 would be the fulfill the same purpose). The elevations 28 shown in FIG. 2 correspond thus exactly the elevations 28 according to FIG. 1c.

In contrast to the embodiment, the metal web 15 is thus shown in FIG Fig. 1 initially not part of the insulating web 3, but is direct and in one piece connected to part 2 of the composite profile. To the form fit between the insulating bar 3 and metal web 15 to produce, the plastic material of the insulating web 3 penetrates positively into the depressions 8 or the elevations 28 positively encloses the plastic forming the insulating web 3 between the corresponding The spaced inner and outer parts 1, 2 of the composite profile are introduced in such a way that z. B. injected, that at the edge of the so forming Isoliersteges 3 a filling that is located between the outer and inner webs 9, 11 Groove and the form fit between the depressions 8 or elevations 28 and the Plastic enters. A subsequent pressing of the inner web 11 is in this Trap not required. In the embodiment according to FIG. 2, too, the insulating webs are 3, 4 completely immovable with the inner and outer parts 1, 2 of the composite profile tied together.

In a further embodiment of the invention according to FIG - Similar to FIG. 1 - Metal webs 25 with elevations 28 in the edge areas of the Insulating bars 3, 4 embedded. Instead of the elevations 28, depressions could also again be used 8 may be provided.

In contrast to FIG. 1, however, the metal webs 25 do not protrude in FIG. 3 upwards, but laterally out of the insulating bars 3. To connect with the Inner and outer parts 1, 2 of the composite profile are used in one piece with these parts connected webs 29, which initially formed a corresponding groove of parts 1 and 2 stick out. After inserting the connected to the metal webs 25 Insulating webs 3, 4 are the webs 29 in the manner shown in FIG. 3 on and formed around the protruding ends of the metal webs 25, for example by appropriate rolling or caulking. Also a connection by welding or gluing is basically possible in the embodiment according to FIG. 3.

In the further embodiment of the invention according to FIG. 4 is for Connection of the inner and outer parts 1, 2 of the composite profile as a hollow chamber profile trained insulating bar 30 made of plastic is provided.

The insulating web 30 has on its sides facing the parts 1, 2 each have an embedded metal web 35 with depressions 38. The depressions 38 could also be replaced by elevations 28. The embedding of the metal bar 35 in the insulating web 30 such that the plastic material of the insulating web in the indentations 38 penetrates in a form-fitting manner or corresponding elevations in a form-fitting manner is carried out by molding the insulating web 30 onto the metal webs 35. As shown, the metal webs 35 protrude on both sides in a manner similar to that in FIG. 3 out of the hollow insulating web 30. The protruding ends can be in the The manner described in connection with FIG. 3 with the inner and outer parts 1, 2 of the composite profile are connected.

As shown in dashed lines in FIG. 4, the insulating web 30 each facing bottom surface of a groove receiving this web 30 in the interior and Outer part 1, 2 has a transverse knurling 36. The knurling creates the contact area between the insulating web 30 and the respective inner and outer parts 1, 2 is reduced. This increases the heat transfer from the metallic inner and outer parts 2 the insulating bar 30 is reduced. The one shown in FIG Knurling 36 could also be used in the longitudinal direction of the composite profile to achieve the same purpose, that is to say perpendicular to the plane of the drawing in FIG. 4.

In that of the inner and outer parts 1, 2 and the insulating bars 3, 4 enclosed chamber (Fig. 1) easily forms a convection flow, which transports heat between parts 1 and 2 in an undesirable manner. To a to prevent such convection currents occurring in the plane of the drawing in FIG. 1, can protrude from the insulating webs 3, 4 transverse walls 12, 13, which are shown in dashed lines in FIG are shown. Such transverse walls can also be in the interior of the insulating web 30 forming hollow chamber profile is provided in the embodiment shown in FIG will.

To achieve a form-fitting connection between the insulating bar 3, 4 and metal web 5 resulting surface roughness can also depressions 8, 38 can be combined with elevations 28. Also a combination of the recesses and / or elevations with continuous perforations on the insulating web 3, 4 sheathing surface parts of the metal web 5 is possible.

When the distance between the inner and outer parts 1,2 is large and therefore relatively wide insulating webs 3, 4 are provided between these parts must, can the torsional stiffness of the composite profile is impaired be. In this case, the invention provides two adjacent insulating bars 3, 4 by bridges, e.g. B. in the form of transverse webs or transverse walls to each other connect and thus achieve a transverse stiffening of the composite profile. The in Fig. 1 cross walls 12, 13 shown in phantom are then used to form a such a stiffening bridge not only with a web, but in one piece with both tied together.

Instead of two spaced apart and od by webs. Like. Interconnected insulating bars 3, 4 can also have three or more insulating bars Find use, all of which are connected to one another by cross stiffeners.

What applies to individual insulating bars also applies to insulating bars 30 with hollow chamber profile according to FIG. 4. Here, too, the hollow chamber profile is through Bridges cross-stiffened, with the hollow profile also more than two between the Inner and outer parts 1, 2 may have extending webs.

The transverse reinforcement of the insulating webs 3, 4, 30 described here can according to the invention not only in the case of the metal webs 5, 15, 25, 35 insulating bars connected to the inner and outer parts 1, 2 are used, but in general, So, for example, even when insulating bars made of plastic can be connected directly to metallic inner and outer parts.

- Lee? Side -

Claims (8)

Claims: 1. Composite profile, especially for window frames, Doors and facade elements, with a metallic inner part, a metallic one Outer part and at least one of these parts with the formation of a thermal insulation bridge interconnecting insulating bar made of plastic, the insulating bar at its The edge areas facing the inner and outer parts form-fit with metal bars is connected and the metal webs with their free edges in grooves of the inner and Engage outer parts, characterized in that the metal webs (5,15,25,35) on their surfaces connected to the insulating web (3, 4, 30) roughness in the form of Have depressions (8, 38) and / or elevations (28), and the insulating web forming plastic in the depressions and elevations of the metal web form-fitting penetrates or encloses them in a form-fitting manner. 2. Composite profile according to claim 1, characterized in that the Metal webs (15) connected in one piece to the metallic inner or outer part (1,2) are. 3. Composite profile according to claim 1, characterized in that the Free edges of the metal webs that engage in the grooves of the inner and outer parts (1,2) (5,25,35) rolled, caulked, welded or are glued. 4. composite profile according to claim 1, 2 or 3, characterized in that that two insulating webs are formed together as a coherent hollow chamber profile (30) are. 5. Composite profile according to one of claims 1 to 4, characterized in that that to reduce the surface contact between the hollow chamber profile (30) and the attached inner and outer parts that come into contact with each other Surfaces a knurling preferably running in the longitudinal direction of the connecting profile (36) or otherwise provided with non-contact recesses are. 6. composite profile according to one of the preceding claims, characterized characterized in that in the cavity delimited by two insulating bars at least a transverse wall (12, 13) is provided, which is provided with at least one insulating web (3, 4) is integrally connected. 7. Composite profile according to one of the preceding claims, characterized characterized in that two or more insulating bars (3, 4, 30) are connected by cross bridges (12, 13) are connected and thereby result in a transverse stiffening of the composite profile. 8. composite profile according to one of the preceding claims, characterized characterized in that the plastic of the insulating web (3, 4, 30) is at least partially is foamed and has a porous or cellular structure.