FI97637C - Hollow molding profile for insulating windows and process for its manufacture - Google Patents

Abstract

The hollow profiled metal bar, esp. made of aluminium is for use in double-glazing, and has a lengthwise weld seam (12a). The seam is formed in a retracted portion of the profile, where it is concealed. There can also be a second retracted portion (8b) on the opposite side of the bar, and which is a mirror image of the first one (8). The bar can have two parallel sidewalls (6), and two other walls (7) at right angles to them with the retracted portions form ed in them and running centrally in the lengthwise direction.

Description

97637

HOLLOW PROFILE FOR INSULATION GLAZING AND METHOD FOR ITS MANUFACTURE

The invention relates to a small profile made of hollow metal, in particular aluminum, for insulating glazing with a weld seam and intended to be placed between the boxes in order to improve the visual impression, and to a method for producing a small hollow profile.

10 In insulating glazing, small ones are arranged between two glass sheets, eg in windows. The small ones consist of hollow profile rods which are assembled with cross-joints and connected to the insulating glazing spacer frames by connecting dowels. The small ones are either metallic or dyed, in which case the color of the small ones is most often matched to the color of the window frames.

In the known small manufacturing method, the hollow profile bar is extruded as a closed profile. In this manufacturing method, the walls of the hollow profile bar must be relatively thick, because thin walls cannot be extruded at a low cost. So such a small one consumes quite a lot of material. Another disadvantage is that the surface treatment of the hollow profile bar is expensive because it can only be done after profiling.

25

In another known method of making a small one, a hollow profile bar with a butt seam is formed from a metal strip, which is then closed by welding.

30 The small one made by this method has a weld seam visible on the surface, which is not optically beautiful. Although surface treatment can make the weld seam invisible, subsequent surface treatment is as expensive as for an extruded small cavity profile. In addition, the consumption of 35 colors is high because the surface treatment must cover the weld so that it remains invisible. Staining before welding is not possible because the paint would return from the welding area during welding and the hollow profile would become ugly.

40 97637 2

The object of the invention is to make, in a simple manner, metallic and colored surface-treated small cavity profiles with a weld seam which does not appear to be optically interfering and which, despite the small wall thickness, are relatively bending and torsionally strong.

The task for small hollow profiles is solved with the features of claim 1 and the method for its production is solved with the features of claim 8. Preferred further applications of the small cavity profiles according to the invention are given in the subclaims.

In the small cavity profile according to the invention, the butt joint and the weld seam are located in the recess of the profile inside the hollow profile. This prevents the butt joint / weld from being visible on the surface. In addition, the profile recess according to the invention increases the bending and, in particular, the torsional strength of the profile.

A particular advantage of the invention is that the surface treatment of the metal strip, in particular the surface dyeing or anodising, can be carried out before shaping into a profile bar. Thus, it is possible to produce hollow profile bars and small ones from already surface-treated or coated metal strip. Such surface treatment or coating is simpler, faster and more inexpensive to make on a metal strip than on a hollow profile bar.

Another advantage of the invention is that the weld seam can be better welded through and thus made wider and stronger. The weld seam can even be large because it is lowered into the recess of the profile so that it is not visible. In addition, it is possible to proceed in such a way that there is no through-weld, but spot welding is used or welding is only intermittent, which can significantly reduce the manufacturing cost.

In the following, the invention is explained in more detail by means of drawings; 11 3 97637

Figure 1 is a front view diagram of an insulating glazed window,

Fig. 2 is a section along the line II-II in Fig. 1 enlarged, Fig. 3 is a perspective diagram showing the manufacture of a hollow small profile 5 from a wide strip of tape

Figure 1 shows an insulating glazed window 1. However, the invention does not only apply to small insulating glazed small windows, but also to small insulating glazing in general.

The insulating glazed window 1 generally comprises window frames 2, at least two spaced apart glass sheets 3 layered on the window frames 2 and glass sheets 3 kept apart by a desiccant-filled intermediate ceramic 4. Small spaces 5 are formed in the space between the glass sheets 3. 12a, and which are arranged crosswise. At the cross-points, the small 5 are connected to each other in a manner known per se by means of cross-joints (not shown). The connecting pins connect the small ones to the spacer frames 4 in a manner known per se.

The small ones 5 can be different in cross-section of the hollow profile. Shown is a common profile in which side walls 6 running parallel to the glass panes 3 and edge walls 7 running transversely to the side walls 6 are arranged. The edge walls 7 are narrower than the side walls 6, so it is advantageous to provide a trough-shaped transition area 30 6a between the walls 6 and 7.

It is essential that both edge walls 7, preferably in their longitudinal center, are profiled with a longitudinal pressure 8, 8b or a grooved recess 9, 9a.

The profile prints 8, 8b are of the same shape and arranged as mirror images with respect to each other. The depth of each groove 9, 9a is e.g. 1/8 to 1/10 of the profile height (the distance between the edge walls 7 4 97637). The width of the groove 9 must be as small as possible, in any case at least so small that the bottom of the groove remains invisible from the outside. It is preferred that the side walls 8a of the groove 9 are aligned.

5

The small ones 5 are always cut to a suitable length from a hollow profile bar 11. The hollow profile bars 11 are formed of a relatively thin metal strip, e.g. aluminum, whereby the longitudinal edges 12 of the metal strips are bent against each other 10 to form a closed tube 11a. The buffer edges, i.e. the longitudinal edges 12, are welded together so that a weld seam 12a is formed. The profiling itself forms a groove 9 such that the weld seam 12a remains in the interior 5a of the profile and invisible. In order for the small 5 to look uniform, it is in accordance with a suitable embodiment of the invention to arrange so that the opposite pipe part 11a of the groove 9 with the weld seam is grooved in the same way and has a groove 9a.

Small 5 is - as already mentioned - preferably aluminum. The thickness of the small wall 20 is about 0.4 to 0.6 mm. The small outer surface preferably has a color layer 6c or is anodized.

A particularly simple method of manufacturing the hollow profile bar 11 is shown in Figure 3. The starting material is a relatively wide metal strip drawn from a strip roll 14. The metal strip 13 is e.g. aluminum and has a relatively thin layer 6c on the outside 13a.

During drawing, the metal strip 13 is firstly cut into a plurality of strips 15, from which preferably hollow profile bars 11 are formed simultaneously, e.g. by rolling and / or heel pressing. The strips 15 can also be rolled and further processed later. The hollow profiles 11 formed from the strips 15 may be of the same cross-section 35 or different. Likewise, the strips 15 may be of the same width or different widths.

The division of the metal strip 13 into a plurality of strips 15 in longitudinal sections 16 takes place at a machining point A, which is in the drawing stage from the roll of metal strip 13. In the drawing direction, after the machining point point A, there is a machining point B with shaping tools (not shown), in which the strips 15 are shaped e.g. into a tube 11a of circular cross-section, where the longitudinal edges 12 are in the butt. The color layer 6c is then on the outer surface of the tube. In the machining point C arranged after the machining point B, which is equipped with a welding device, the longitudinal edges 12 are welded into a welding seam 12a, preferably by laser welding. After the machining point C there is a machining point 10 with a shaping tool (not shown) for forming prints 8, 8b in the profile and at the same time or after this the profiling of the side walls 6, 6a and the edge walls 7 can also be shaped.

15 When welding, the color returns from the area of the weld seam 12a. With the profile printing according to the invention, the weld seam itself is hidden in the region of the weld seam, as well as the color area damaged by the welding heat in the groove 9, so that they remain invisible from the outside. This unusual operation provides that hollow profiles formed and welded from a coated metal strip can be used in small sizes without optically interfering with the weld seam and the partially burnt color range. But even when uncoated metal strips are used, small ones can be formed whose weld seam is hidden 25 and does not appear to be optically interfering.

The hollow profile bars 11 made in one piece are cut into suitable commercial lengths and are used as an intermediate product by the manufacturer of insulating glazing. The manufacturer cuts the small 5 30 hollow profile bars 11 and forms the desired small assemblies for insulating glazing.

The invention thus has at least one profile print to make the welding seam invisible, and on optical grounds it is proposed to provide at least a second profile print as a mirror image for the profile print with the weld seam. The weld seam does not have to be arranged on the edge side. It can be in another side wall, for example, if the optical requirements for the small profile allow it.

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Claims (14)

1. A hollow molding profile of metal, especially aluminum, for insulating windows, which molding profile has a weld joint 5 and is intended to be placed between the glass panes (3) to improve the visual impression, characterized in that the weld joint (12a) is optically arranged invisible in the recess of the profile (8). Hollow molding profile according to Claim 1, characterized in that at least one of the other profile recesses (8b) is a mirror image of the profile recess (8) on the opposite side of the hollow molding profile. A hollow molding profile according to claims 1 and / or 2, which profile has two side walls (6) and in relation thereto a transverse edge wall, characterized in that the profile recesses (8, 8b) are arranged to extend the center point of the edge walls (7). . 20 Hollow molding profile according to one or more of claims 1-3, characterized in that the profile recesses (8, 8b) in cross-section are U- or V-shaped rafters (9, 9a), the weld joint (12a) being in the bottom of the latch (9). 25 Hollow molding profile according to one or more of claims 1-4, characterized in that the side walls (8a) of the opposing rafters (9, 9a) are arranged in parallel. 6. Hollow molding profile according to one or more of claims 1-5, characterized in that the outer surface of the molding profile is coated. especially colored. Hollow molding profile according to one or more of claims 1-5, characterized in that it is of aluminum and the outside is anodized. A method of producing a hollow molding profile (5), according to one or more of claims 1 to 7, of a metal strip, heist colored or anodized, especially of aluminum, of a strip in which the long sides (12) of the strip are folded, forming tubes against each other until they lie against each other, after which the long joints are welded together and the tube is further profiled into a hollow profile, whose cross-sectional shape is predetermined, characterized in that a profile depression (immediately after welding) is achieved ( 9) in the area of the weld joint (12a) on the pipe, so that the weld joint (12a) is at the bottom of the profile recess (9), invisible from the outside. Method according to claim 8, characterized in that the opposite region of the profile depression (9) is formed as a mirror image, heist simultaneously, a second profile depression (9a) of the same shape. 15 Method according to claims 9 and / or 10, characterized in that U- or V-shaped rafters are formed as profile recesses (9, 9a). 20 Method according to one or more of claims 8-10, characterized in that the side walls of the profile recess (9) which are mutually opposed to each other are pressed to face each other. 25 Method according to one or more of claims 8 to 11, characterized in that a round tube is formed by the strip (15). Method according to one or more of claims 8 to 12, characterized in that several narrower strips (15) or elongated pieces are formed from the relatively wide metal band (13) and that hollow profiles are formed by the strips, heist simultaneously. . 35 Method according to claim 13, characterized in that metal strips (13) are used which are colored or anodized on one side.