FACADE CLADDING PROFILE

Description

[0001] The invention relates to a facade cladding profile comprising a base profile made of plastic, in particular of an extruded plastic, a visible surface, an adjoining shadow gap surface, and a fastening strip, in particular which adjoins the shadow gap surface, wherein the visible surface is formed by a plastic film fastened to the base profile, and the shadow gap surface is designed differently than the visible surface of the facade cladding profile.

[0002] Such a plastic facade cladding profile or panel is preferably a single-piece base profile and can be manufactured into profile form by continuous casting or extrusion. Thermoplastics, particularly PVC (polyvinyl chloride), are preferably used as the plastic material for the base profile. PVC is also used, for example, in window frame construction or for pipes.

[0003] During production, the PVC material, preferably in granular form, is thermally melted and pressed through a mold. The PVC cools slowly and retains its shape. The molds can have a wide variety of contours. Typically, a base profile has hollow chambers defined by webs, with the cross-section remaining constant along its length.

[0004] Facade cladding profiles of the type mentioned above are known from the prior art. These are used, for example, for cladding the facades of buildings or mobile homes. To fix the facade cladding profiles to the wall of a building, a substructure, e.g. made of wood, is provided on the wall of the building, to which the facade cladding profiles, in particular those which can be several meters long, are attached. The facade cladding profiles comprise a visible surface and an adjoining shadow gap surface, which in turn is followed by a fastening strip. The shadow gap surface is offset in height from the visible surface, i.e. the shadow gap surface has a level that is lower than the visible surface. The same preferably also applies to the fastening strip opposite the shadow gap surface and / or the visible surface.

[0005] The fastening strip can preferably have a plurality of openings arranged one behind the other in the longitudinal direction, which serve to receive fastening means, e.g. nails or screws, by means of which the individual plastic facade cladding profiles can be fastened to the substructure on the wall, for example of a building.

[0006] However, the fastening strip not only serves to connect the facade cladding profiles to the substructure on the wall of a building, but also allows two such facade cladding profiles to be connected to each other using a tongue and groove joint. For this purpose, the fastening strip extends the length of the facade cladding profile on one side, and a corresponding groove runs along the opposite longitudinal edge of the facade cladding profile.

[0007] The visible surface of the facade cladding profiles can be designed in many different ways. For example, it is known to form the visible surface using film, in particular where the film is designed in a desired color and / or has a structure, in particular imitating the appearance of a wooden surface. In this context, it is preferably provided that the films are made of PVC. Such PVC films, which have an adhesive layer on one side, are usually not UV-resistant. In order to make such a film UV-resistant, it is known to coat this film with acrylic. This film, preferably film coated with acrylic, more preferably extends into the region of the shadow gap surface.

[0008] If you want to design the shadow gap surface differently from the visible surface of the facade cladding profile, it is known to create the shadow gap surface using a PVC film, which can also be coated with acrylic on the outside, glued to a profile web. In the area where the film transitions to the visible surface of the facade cladding profile, the film of the shadow gap surface rests on top of the film of the visible surface, or vice versa. However, the adhesive on the underside of the film of the shadow gap surface does not adhere particularly well to the acrylic coating of the film of the visible surface, or vice versa.Particularly when the films are exposed to extreme heat loads, as is the case, for example, when such facade cladding elements are installed on the south side of a building, the overlapping film—in this case, the film on the shadow gap—detaches from the top of the film on the visible surface. The film then gradually peels off across the entire surface. This is due to the acrylic coating.

[0009] According to the state of the art, utility model DE 20 2018 104 844 U1 offers a solution for providing a different surface, particularly with regard to the color design between the visible surface and the shadow gap surface, which is permanently durable. It is required that at least the material of the shadow gap surface be designed in a different color than the visible side of the film on the visible surface. Specifically, according to the doctrine of the patent, the shadow gap surface is either painted in color or the entire base profile of a facade cladding profile is manufactured in one piece from the desired colored material for the shadow gap surface, e.g., using an extrusion process, and the visible surface is formed by a film glued to the base profile. In order to achieve a colorful shadow gap surface, expensive color pigments are added to the THERMOPLAST melt for the entire base profile.However, since only the narrow area of ​​the shadow gap surface of the facade cladding profile is to be colored, it is an economic disadvantage to color the entire base profile, which is covered with a film.

[0010] The object underlying the invention is therefore to remedy this situation and to further develop the known state of the art. In particular, the object is to provide a different surface design, particularly with regard to the color design between the visible surface and the shadow gap surface, which can be produced economically and efficiently from a commercial perspective.

[0011] This object is achieved by a facade cladding profile according to claim 1, wherein the shadow gap surface is formed by a coextrusion layer integrally connected to the base profile, and wherein the surface of the coextrusion layer merges seamlessly / edgelessly into the surface of the base profile at its opposite transition regions.

[0012] A coextrusion layer is understood to be a layer or layered component that is produced by the coextrusion process at the same time as the base body, which is also produced by extrusion.

[0013] The advantageous features and embodiments of the invention emerge from the subclaims.

[0014] In particular, it is intended that the coextrusion layer is designed in a different color than the visible side of the plastic film of the visible surface.

[0015] This can be achieved, for example, by extruding the base profile from a first plastic material and extruding the coextrusion layer from a second plastic material onto the first plastic material of the base profile in a material-to-material manner. The first and second plastic materials differ at least in that at least one color pigment is added to the second plastic material to achieve a different color than the first plastic material. Furthermore, the two plastic materials can also be different apart from the color pigment.

[0016] The coextrusion layer is extruded onto the base profile and is firmly bonded to it.

[0017] Advantageously, the base profile, in particular made of recycled rigid PVC, especially conventionally gray, has a wall thickness that is greater, preferably several times greater, than the wall thickness of the coextrusion layer. The wall thickness of a web of the base profile located beneath the coextrusion layer, to which the coextrusion layer is firmly bonded, can be greater, in particular several times greater, than the wall thickness of the coextrusion layer.

[0018] Because expensive color pigments are added to the coextrusion layer, the wall thickness of the coextrusion layer is preferably not made thicker than necessary for cost reasons. Complete opacity of the shadow gap surface over the material of the base profile is essential for an attractive appearance in the assembled facade. Especially with light-colored shadow gap surfaces, the base profile, on or to which the coextrusion layer is extruded, must not show through the coextrusion layer.

[0019] In practice, a thickness of at least 400 µm = 0.4 mm has proven to be suitable for full opacity of the coextrusion layer.

[0020] It can also be provided that the coextrusion layer partially or completely forms a web of the base profile, in particular the coextrusion layer extends over the entire thickness of a web of the base profile, the visible upper side of which forms the shadow gap surface.

[0021] From a manufacturing perspective, THERMOPLAST melts that are pressed through the extrusion die in parallel but with different wall thicknesses always pose a challenge, as warping can occur during cooling. The difficulty is further increased because the coextrusion layer contains color pigments. A uniform flow line is required. This ensures that a dimensionally stable facade cladding profile is created after curing, without warping.

[0022] For optimal results, a raw material that flows when heated, preferably a raw polymer mixed with color pigments (e.g., a masterbatch), can be used for the coextrusion layer. The coextrusion melt prepared in this way, especially in combination with a conventional rigid PVC melt, allows even different wall thicknesses to be produced at the usual extrusion speed and a dimensionally accurate facade cladding profile to be produced.

[0023] The addition of special color pigments can, in particular, lead to reduced heat transmission. In particular, it can be provided that the thermal transmittance of the facade cladding profile is lower at the shadow gap than in other areas of the facade cladding profile.

[0024] In particular, it is intended that the shadow gap surface be offset in height from the visible surface of the plastic facade cladding profile by means of a slanted edge. By definition, the visible surface extends at least over a large part of the offset edge, i.e., essentially to the shadow gap surface. In this context, it has been found that when the visible surface extends from the outer, free end over the offset edge to the shadow gap surface, i.e., when the plastic film also extends from the outer, free end to the shadow gap, the appearance is significantly more appealing than when the offset edge has the same surface as the shadow gap surface.

[0025] It should be emphasized that the smooth transition between the coextrusion layer and the base profile is important, especially in the transition area to the plastic film, because only an edgeless surface ensures that the plastic film can be applied continuously and with complete adhesion. Ideally, the plastic film overlaps the transition area between the base profile and the coextrusion layer, in particular by around 4 - 5 mm. Optimally, the film edge ends at the apex of the radius of the transition area. The coextrusion layer preferably has a constant wall thickness up to the transition areas in the cross-section. In each transition area, the wall thickness can decrease towards the end of the coextrusion layer, preferably down to the level of the surface of the base profile. The wall thickness thus decreases towards the outwardly visible surface of the coextrusion layer.

[0026] According to a further feature of the invention, it is preferably provided that the coextrusion layer in the transition area to the fastening strip is covered in the assembled state by the outer end of an added / further facade cladding profile.

[0027] Furthermore, it is preferably provided that two facade cladding profiles can be moved into one another by means of the fastening strip on one side of a facade cladding profile into a corresponding receiving groove on the opposite, other side of another facade cladding profile in the manner of a tongue and groove connection, so that the fastening strip is covered by the receiving groove in the longitudinal edge of the adjacent profile.

[0028] A facade surface consisting of at least two mounted facade cladding profiles completely covers the shadow gap with the coextrusion layer as a shadow gap surface and creates not only a visually appealing look but also a weather-resistant surface.

[0029] The invention is explained in more detail below with reference to the drawings.

[0030] The figures show in detail: Fig. 1a facade cladding profile shown in cross section Fig. 1a detail of the Figure 1 Fig. 1bAn alternative version of the detail

[0031] The Figure 1The facade cladding profile 10 shown in cross-section has a visible surface 12, which extends from the outer, free end to the shadow gap surface 13. The visible surface 12 is formed by a plastic film 19 being glued to the base profile 20, which, with its outward-facing visible side 19a, forms this visible surface 12. The shadow gap surface 13, in turn, continues in the fastening strip 15. The transition between the visible surface 12 and the shadow gap surface 13 is designed as an inclined, stepped edge 17.

[0032] The film 19 is preferably designed as a colored and / or structured PVC film, in particular coated on the visible side 19a with acrylic, PVDF, or other sealing materials, and extends from the outer end 11 of the facade cladding profile 10 over the offset edge 17 to the shadow gap surface 13. The shadow gap surface 13 is colored in a contrasting manner with the visible surface 12 of the facade cladding profile. This effect is created by the extruded coextrusion layer 21, which preferably extends across the entire width of the shadow gap surface 13 and forms this shadow gap surface 13, and more preferably tapers off at the end radii into edgeless, preferably flowing, and preferably drop-shaped transitions 22a, 22b.

[0033] The fastening strip 15 can preferably have a plurality of openings 15a arranged one behind the other in the longitudinal direction of the facade cladding profile. These openings serve to receive fastening means, e.g., nails or screws, for attaching the facade cladding profiles to the substructure on the wall of a building. The facade cladding profile 10 also has a receiving groove 16, which serves to receive the fastening strip 15 of another facade cladding profile in the manner of a tongue and groove connection.

[0034] The Figure 1a shows the shadow gap surface 13, which is formed by a coextrusion layer 21, in detail according to the Figure 1 .

[0035] In this illustration it is clear that preferably the wall thickness d of the coextrusion layer 21 is smaller than the wall thickness D of the underlying web of the base profile 20, to which the coextrusion layer 21 is firmly attached by coextrusion.

[0036] Alternatively, it can be Figure 1b It can also be provided that the entire web or a partial area of ​​the web of the facade cladding profile, whose visible outer side forms the shadow gap surface 13, is formed entirely from the material of the coextrusion layer 21 in terms of thickness. This web or partial area of ​​the web as a whole is then materially bonded to the extruded base body 20 of the facade cladding profile by coextrusion. List of reference symbols

[0037] 10Facade cladding profile 11Outer end 12Visible surface 13Shadow gap surface 15Fastening strip 15aOpening 16Receiving groove 17Bevel / edge 19Plastic film 19aVisible side 20Base profile 21Coextrusion layer 22aTransition area to the plastic film 22bTransition area to the fastening strip dWall thickness of the coextrusion layer DWall thickness of the base profile

Claims

1. Facade cladding profile (10) comprising a base profile (20) made of plastic, in particular of extruded plastic, a visible face (12) and an adjoining shadow gap face (13), and an attachment strip (15), in particular which adjoins the shadow gap face (13), wherein the visible face (12) is formed by a plastic film (19) attached to the base profile (20) and the shadow gap face (13) has a different design from the visible face (12), characterized in that the shadow gap face (13) is formed by a coextrusion layer (21) materially bonded to the base profile (20), wherein the surface of the coextrusion layer (21) at its opposite transition regions (22a, 22b) transitions smoothly / edgelessly into the surface of the base profile (20).

2. Facade cladding profile (10) according to Claim 1, characterized in that the coextrusion layer (21) has a different-coloured design from the visible face (12).

3. Facade cladding profile (10) according to either of the preceding claims, characterized in that the base profile (20) is extruded from a first plastic material and the coextrusion layer (21) is extruded in a materially bonded manner from a second plastic material onto the first plastic material of the base profile (20), in particular wherein the first and second plastic materials at least differ in that at least one colour pigment is added to the second plastic material to achieve a different colour than in the first plastic material, in particular the two plastic materials also differ.

4. Facade cladding profile (10) according to any one of the preceding claims, characterized in that the heat transfer coefficient of the facade cladding profile at the location of the shadow gap face (13) is smaller than in other regions of the facade cladding profile.

5. Facade cladding profile (10) according to any one of the preceding claims, characterized in that the coextrusion layer (21) in the transition region (22a) to the plastic film (19) is covered by the plastic film (19).

6. Facade cladding profile (10) according to any one of the preceding claims, characterized in that the coextrusion layer (21) in the transition region (22b) to the attachment strip (15) in the assembled state is covered by the outer end (11) of an added / further facade cladding profile (10).

7. Facade cladding profile (10) according to any one of the preceding claims, characterized in that the coextrusion layer (21) has a constant wall thickness (d) up to the transition regions (22a, 22b) in cross section, in particular the wall thickness (d) in the transition regions (22a, 22b) is decreasing, preferably to the level of the surface of the base profile (20).

8. Facade cladding profile (10) according to any one of the preceding claims, characterized in that the coextrusion layer (21) has at least a wall thickness (d) which, in the case of a predetermined colour pigment admixture, in particular a light colour pigment admixture, ensures complete colour coverage of the material of the base profile (20), in particular the wall thickness (d) is greater than 400 micrometres.

9. Facade cladding profile (10) according to any one of the preceding claims, characterized in that the coextrusion layer (21) is formed of a flowable plastic raw material which is provided with colour pigments, preferably wherein the colour pigments form 2% to 2.5% of the mass of the plastic raw material.

10. Facade cladding profile (10) according to any one of the preceding claims, characterized in that the shadow gap face (13), in particular the coextrusion layer (21), is offset in height relative to the visible face (12).

11. Facade cladding profile (10) according to any one of the preceding claims, characterized in that the wall thickness (D) of a web of the base profile (20) lying under the coextrusion layer (21), and on which the coextrusion layer (21) is attached in a materially bonded manner, is greater, in particular greater by a multiple, than the wall thickness (d) of the coextrusion layer (21).

12. Facade cladding profile (10) according to any one of the preceding claims, characterized in that that the coextrusion layer (21) completely forms a web or sub-region of a web of the base profile (20), in particular the coextrusion layer (21) extends over the entire thickness of the web or sub-region of the web of the base profile (20) of which the visible top side forms the shadow gap face (13).

13. Facade cladding profile (10) according to any one of the preceding claims, characterized in that two facade cladding profiles (10) can be pushed one into the other in the manner of a tongue and groove connection by the attachment strip (15) on the one side of a facade cladding profile (10) and a corresponding receiving groove (16) on the opposite other side of the attachment strip (15) of another facade cladding profile (10).