CZ2012152A3 - Plastic profile element - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a profiled element made of plastic, in particular for window sashes or for other glazing supports or window frames. The profile element is provided with several chambers (7) which are foamed with foam material (8), preferably polyurethane foam, wherein at least one of the reinforcing elements (9) is supported in one of the chambers (7). The invention further relates to a window sash (1) of such a profile element with glass (2) provided with a glass retaining strip (4), wherein the retaining strip (4) is made of plastic material and foamed with foam material (8). ), preferably polyurethane foam. The present invention further relates to a window frame (5) for a window wing, wherein the window frame (5) is also formed from a profile element according to the invention.

Description

Plastic profile element

Technical area

The invention relates to a profile element made of plastic, designed in particular as a frame profile, and a window sash or other glazing carrier, also intended for window frames or the like, with a certain number of chambers.

State of the art

Window sash or frame profiles, which are cut on a miter and joined into the shape of generally four-sided window sashes or window frames, are designed as chambered for reasons of stability and insulation, i.e. they are divided by a number of bridges into a certain number of chambers in the cross-section of the profile, which are generally filled with air to prevent undesirable complications in the production of profiles by extrusion.

To achieve better strength in the area of one or more glass panes (combined glass with two or three panes), reinforcement is inserted into one of the larger chambers of the profile element or window sash profile in the zone of the glass pane, in order to ensure the stability of the window frame.

After direct foaming of the profile chambers of window profiles brought technological problems (cf. document DE 103 56 49 A1), it is also known to use partially inserted profiles made of polyurethane foam to improve the insulating properties of plastic profile elements intended for window profiles (window sashes or window frames).

The situation where polyurethane foam cores are used in some chambers of a profile element for the production of window or door frames (cf. document AT 410 350 A) also brings difficulties with larger dimensions of these elements and is not satisfactory in terms of achievable heat transfer values.

The essence of the invention

The basis of the invention is therefore the problem of introducing a profile element made of plastic, which is both light, but with regard to its values for heat transfer in houses meets the passive requirements placed on them, and also exhibits considerable rigidity and mechanical load-bearing capacity. Furthermore, the invention is to introduce the corresponding window sash (sash frame) and window frame, as well as a combination of these elements, creating a complete window system.

According to the invention, this task is solved with respect to the profile element by the features of claim 1.

With respect to a window sash, a window frame or a combination of window sashes and window frames, the above-mentioned object is achieved by the features of claims 8, 10 and 11.

Accordingly, the invention provides a profile element made of plastic, in particular for window sashes or other glazing carriers, window frames, door frames or the like, which is designed as a multi-chamber profile with a plurality of chambers which are essentially completely foamed with foam material, in particular polyurethane foam, wherein a reinforcing element is arranged in at least one of the chambers. It is therefore essential that all chambers of the profile element are at least essentially completely foamed, as well as that the reinforcing element, in particular a hollow steel profile, preferably an open profile, is used, so that the profile element and thus the window sash or window frame consisting of it have very good thermal insulation properties and a heat transmission value Uw < 1, while this element is light and also has sufficient mechanical stability.

Preferably, the reinforcing element, in particular a C-shaped steel element or other comparable steel angle element, is completely embedded in the foam material.

Preferably, this foam material, in particular polyurethane foam, does not have a higher processing temperature or exothermic reaction temperature than 80 to 90° C.

Preferred embodiments of the invention are set forth in the dependent claims.

Clarification of drawings

The invention will be explained in more detail below on the basis of exemplary embodiments and the relevant drawings. They show:

Fig. 1 is a cross-section of a profile frame of a window sash according to one embodiment of the invention, Fig. 2 is a cross-section of a combination of a window sash with a window frame,

Fig. 3a - 3d computer simulated representation of the course of isotherms in the combination according to Fig. 2, as well as in another further embodiment, Fig. 4 cross-section of the combination of a window sash with a window frame in another embodiment, intended for heat adsorbing or absorbing external surfaces, similar to the embodiment according to Fig. 2, and Fig. 5 cross-section of the combination of a window sash with a window frame in another embodiment, intended for heat repelling (reflecting) external surfaces, similar to the embodiment according to Fig. 2.

Examples of implementation of the invention

Fig. 1 shows the profile frame P of the window sash 1 (see Fig. 2). The profile frame P (the glass pane and the glass retaining strip are not shown) consists of a number of foamed chambers 7, with a reinforcing element, in particular a steel profile element 9, preferably being placed in the largest chamber 7a.

For further description, which also concerns the profile frame P according to Fig. 1, reference will be made to the following description of Fig. 2.

Fig. 2 shows a cross-section of a window sash 1 with a pane 2 of laminated glass, inserted into the sash and shown only schematically, which is held in the window sash 1 by sealing profiles 3 and a glass retaining strip 4.

Fig. 2 shows the sash 1 in connection with the window frame 5, to which the window sash 1 is connected, or into which it is pressed using sealing profiles 6.

The special feature of the profile frame P (Fig. 1) or the window sash 1, hereinafter referred to as the sash frame 1, which contains a number of chambers 7, is that all of them, but at least in the amount of about 75%, are completely filled or foamed with polyurethane foam 8 as a foam material, whereby the polyurethane foam 8 is preferably immediately and directly foamed into the chambers 7 of the sash frame 1. To achieve the best thermal insulation values, it is advantageous if all chambers 7 are completely foamed. However, the term "substantially complete foaming of the chambers" should be understood as the degree of filling of 100% of the number of chambers 7, down to about 75% of the total number of chambers 7.

Another special feature of the sash frame 1 is that in the largest chamber 7a there is an open steel profile element 9 as a profile reinforcement element of the sash frame 1, which is completely foamed with polyurethane foam and is possibly supported by projections on the wall of the chamber 7.

As a result of the practically complete foaming of the entire transverse profile of the frame 1 of the sash, this frame has a house value of passive heat transfer ability Uw < 0.8 (value of the thermal conductivity coefficient of the material λ = 0.3 W/mK).

The steel reinforcing profile 9 serves for static reinforcement of the frame 1 of the sash and at the same time as protection against burglary, while at the same time it acts as a guiding element of the isotherm inside the frame 1 of the sash in connection with the composite panel 2, as shown by measurements and simulation results (cf. Fig. 2a - 2d).

Figure 1 also shows a window frame 5 in cross-section, which is also foamed to at least 75% in a chambered design (with chambers 11), but is preferably completely foamed with foam material, in particular polyurethane foam 8. Here too, a reinforcing element 12, preferably a hollow profile part made of steel, is located in the largest chamber 13, essentially in the vertical extension of the composite pane, as well as in the reinforced chamber 7a of the sash frame 1, which is also completely embedded in foam material, in particular polyurethane foam material 8. Here too, the combination of polyurethane foam material 8 with a reinforcing profile 12, preferably made of steel or fiber-reinforced plastic material, achieves, on the one hand, a particularly high thermal insulation capacity of the window frame 1, and on the other hand, excellent mechanical stability and protection against burglary or the like. The steel profile part 12 is also supported by the projections 14, or on them.

here, the frame profile of the window frame 5 is preferably foamed in situ with polyurethane in its chambers 11, preferably using polyurethane foam with a density of 30 to 40 kg/m 3 .

Such foam with a λ value of approximately 0.021 to 0.031 allows for the full fulfillment of passive house standards, or rather the achievement of the advantages of low-energy houses with a heat transfer coefficient Uw < 0.8.

The invention creates a lightweight, but also mechanically highly strong window and/or frame profile for windows or door frames or the like, which additionally has great mechanical stability, so that polyurethane foam with a lower density but with a particularly high resistance to heat transmission can be used.

It is particularly advantageous if the glass retaining strip 4 is also foamed with polyurethane foam 8, as also shown in Figure 1. This further improves the insulating thermal resistance.

The relevant computer simulation figures of the combined window frame/casement frame system are shown in Figures 3a to 3d, with the isotherms marked with the number 15.

Figure 3a shows an embodiment in which the reinforcing profile (steel profile element 9) is inserted only into the frame 1 of the window sash, the chambers 11 of the window frame 5 are foamed with polyurethane foam 8 with a value of λ = 0.031, which is also used to foam the chambers 7 of the frame 1 of the sash. Overall, a value of Uf = 0.82 W/m ² K is achieved. In Figure 3b, in addition to the frame 1 of the sash, a reinforcing steel profile element 12 is also inserted into the window frame 5. In this case, when the chambers of the profiles £_a 5 (sash profile and frame profile) were foamed with polyurethane foam with a value of λ = 0.031, a value of Uf = 0.94 W/m ² K was achieved.

When using polyurethane foam with a value of λ = 0.021, the Uf values shown in the following table were obtained, while the corresponding designs with polyurethane foam with a value of λ = 0.021 are shown in Figures 3c and 3d (without window frame reinforcement and with reinforcement).

Uf value PU-foam with λ = 0.031 Uf value PU-foam with λ = 0.021 only window sash 1 with steel profile 9 0.82 W/ ^m2K 0.74 W/ ^m2K window sash 1 and window frame 5 with steel profile, element 9, 12 0.94 W/ ^m2K 0.84 W/ ^m2K

In this way, a window system can be created, consisting of a window frame and a window sash, which is formed by a combination of a reinforcing element and complete, or at least substantially complete, foaming of the chambers of the profile elements with polyurethane foam with a relatively low density on the one hand, and on the other hand, a window frame system with the ability of passive heat transmission and with remarkable thermal insulation properties.

In this context, it is particularly advantageous to use plastic hollow profile strips filled with polyurethane foam, also for the 4 glass retaining strips.

Profile rails, in particular made of fiber-reinforced plastics or fiber-reinforced molded materials, are also suitable as reinforcing profile elements 9, 12.

Figure 4 shows another embodiment of the invention, in particular a window system with a window sash frame 1 in connection with a window frame 5, wherein a steel profile element 9 as a trapezoidal open hollow profile of a reinforcing element is inserted into the largest chamber 7a of the sash frame 1 and this chamber 7a is completely foamed with polyurethane foam. Optionally, the steel profile element 9 itself rests on the inwardly directed projections of the chambers 7a or also the chamber walls.

In this case, the outer chambers 7b, 7c, 7d (on the outside of the sash frame 1), in particular the outer front chamber 7b, are preferably not filled with polyurethane foam, and the same applies to the outer chambers 11b, 11c, 11d, in particular to the front chamber 11b of the window frame 5. In the largest chamber 13 of the window frame 5, a steel profile part 12 is located as a reinforcing element. The explanation regarding the embodiment according to FIGS. 1 to 3 also applies to this exemplary embodiment, unless the different special features mentioned are discussed here.

Such profile elements are preferably used for window or other profile systems that are provided with a heat-absorbing layer, i.e. less reflective coloring (darker coloring), and in which good dissipation of radiant heat from the profile elements (from the sash frame 1 and from the window frame 5) as well as from the outer surface of the profile is preferred, in order to prevent heat accumulation in the profile element.

The chambers of the window sash 1 or window frame 5 without foam also serve, at least partially, to drain the profiles.

In the case of profile elements, e.g. in the case of the sash profile 1 and the window frame 5, which have a very light or white outer layer or color, there is no need to worry about heat accumulation, while the outer chambers, in particular the outer front chambers 7b, 11b. are foamed. Figure 5 shows such an example of an embodiment with the sash frame 1 and the window frame 5, whereby the always outer front chambers 7b, 11b in both the sash frame 1 and the window frame 5 are completely filled with polyurethane foam, and e.g. only the transition chambers 7c, 7d, or 11c, 11d lying between them remain unfilled with foam, made "in situ".

In other respects, the explanations relating to the exemplary embodiment according to FIGS. 1 to 3 also apply to this exemplary embodiment, unless the special features of the profile configurations explained are discussed here.

The window frame 5 also has a stabilizing open steel profile 12 in its largest chamber 13 as a reinforcing element.

By setting the degree of foaming of the profile elements and the location of the foamed and unfoamed chambers of the profile elements (frame 1 of the sash and window frame 5), it is possible to determine the heat transfer profile while taking into account the heat input due to the outer layer or the color (degree of reflectance or absorption) of the profile body system.

The invention is of course also applicable to door elements or other profile elements arranged for insertion into the external walls of buildings or already inserted there, e.g. in the field of panel houses.

Claims (11)

Patent claims A plastic profile element, intended in particular for sash windows or other glazing carriers or for window frames, with a plurality of chambers, characterized in that the chambers (7, 11) are completely foamed with a foam material (8) and in at least one of a reinforcing element (9, 12) is mounted in the chambers (7a, 13). Profile element according to Claim 1, characterized in that the foam material is polyurethane foam (8). Profile element according to Claim 1 or 2, characterized in that the reinforcing element in the chamber (7a, 13) is embedded in the foam material, in particular in the polyurethane foam (8). Profile element according to one of the preceding claims 1 to 3, characterized in that the reinforcing element (9, 12) is a profile, in particular a substantially C-shaped profile or a box profile which is made of steel, glass-fiber-reinforced plastic or the like. Profile element according to one of the preceding claims 1 to 4, characterized in that the volume of the chamber (7a, 13) in which the reinforcing element (9, 12) is accommodated is greater than the volume of the other chambers (7, 11). Profile element according to one of the preceding claims 1 to 5, characterized by a connection to at least one glass pane (2), preferably a plurality of these panes, the chamber (7a, 13) with the reinforcing element (9, 12) being substantially arranged in a vertical extension of the glass panes (2). Profile element according to one of the preceding claims 1 to 6, characterized in that at least one externally mounted front chamber (7b, 11b) is provided which is not filled with plastic foam or is not completely filled with plastic foam. Window sash with a profile element according to one of the preceding claims 1 to 7. 9 · .. * · .. · ··. ··. ·· Window sash according to Claim 8, with a glass retaining strip (4) made of a plastic material which is foamed with a foam material, in particular polyurethane foam. Window frame with profile element according to at least one of the preceding claims 1 to 7. A sash combination with a window frame according to claim 8 or 9 and claim 10.