DE102007062903B4 - Method for producing an insulated window or door frame - Google Patents

Abstract

Method for producing a door or window frame (1) from hollow profiled elements (2, 3, 4, 5) having at least one chamber (7) which contains an insulating foam core (22), wherein the frame (1) consists of a plurality of successive hollow profiled elements (2 , 3, 4, 5), characterized in that first the hollow profile elements (2, 3, 4, 5) are connected to a frame (1) and thereafter through at least one opening (8) of the frame (1) of the insulating foam in fluid form into which at least one chamber (7) is filled, said at least one opening (8) and at least one further opening (10, 11, 12) of the frame (1) allowing air to escape from the chamber (7). allow.

Description

The invention relates to a method for producing a window or door frame from hollow profile elements with at least one chamber containing an insulating foam core, wherein the frame is assembled from a plurality of successive hollow profile elements.

Frames of the type relevant here are used in window construction as a frame or sash. The hollow profile elements are known to be made of aluminum or preferably plastic such as PVC. The hollow profiles are known to have a plurality of adjacent chambers for sound and thermal insulation.

In the case of plastic profiles, it is known, on the one hand, to introduce metal rails, in particular made of steel, into individual chambers for stabilizing the frame, which are known to be in the form of a square tube or simple, open rolled profiles.

In order to reduce the heat transfer through such frames, it is also known to fill at least individual chambers with a Dämmschaumkern. For this purpose, either a prefabricated foam core is inserted, which is optionally combined with one of the mentioned metal rails. Or a foaming material is injected into the hollow profile.

From the DE 2 038 073 C is a method for the production of foam-filled hollow plastic profile bars, which are provided for windows known. The method includes mitring the plastic hollow profile bars and connecting them to form a frame. Before joining the profile bars they are foamed with a foam. End sections in the area of the frame corners are more densely foamed than the other foam-filled areas. For this purpose, the walls of the profile bars on holes through which the foam material is pressed under increased compression in cavities that have formed when connecting the profile bars in the frame corners.

The DD 86 923 A5 discloses a method for producing solid, force-transmitting, heat-insulating connections between thermally conductive components as well as building produced by this method.

In the US 3,517,472 A is disclosed a structural element with a thermal barrier. This structural element comprises an elongate, thermally insulating plastic closure element. The closure part has parts that engage with elongated pieces. These pieces are made of two elongated metal parts and thus form a single, solid part.

The production of the hollow profile elements is usually carried out in several stages: In the first stage, a corresponding hollow profile is produced in the factory in a length of several meters. In the second stage of this several meters long material in the workshop of a window maker a hollow profile element is cut to the required dimensions. Such a hollow profile element is then usually provided at its ends with a miter and joined there to form an angle of for example 90 ° with another hollow profile element.

In this assembly, the cut edges of the hollow profile elements are brought together with the interposition of a Heizschwertes. They are heated by the heating sword and finally compressed after removal of the heating sword. After cooling the compressed cutting edges creates a solid corner joint.

However, the previously known hollow profiles with a Dämmschaumkern lead to problems in this processing: While the material of the hollow profile elements shortens somewhat in the described joining / welding, the foam core, which often consists of a thermoset, retains its original length. The corresponding Dämmschaumkerne must therefore be shorter from the beginning or shortened before joining two hollow profile elements accordingly by the present in the hollow profile element foam core is milled out at the interface or scratched out manually.

Both measures are troublesome for the workflow, because it is difficult to precisely cut the foam core by the exact amount required. If the foam core is not shortened sufficiently, this can lead to problems when joining two hollow profile elements. If the foam core is shortened too much, the finished frame at the junction of two hollow profile elements on an undesirable cold bridge, which is not tolerable in today's requirements.

Object of the present invention is therefore to provide a method for producing a frame of hollow profile elements, in particular made of plastic and for door and window construction, wherein the frame contains a Dämmschaumkern and is assembled from several hollow profile elements, which is characterized by a simple workflow and at the joints of two hollow profile elements a seamless course of the Dämmschaumkernes guaranteed. This method should be reliable in the workshop of a window manufacturer can be carried out and also cost-effective in view of the generally prevailing in construction cost pressure.

This object is achieved in that first the hollow profile elements are connected to a frame and then filled by at least one opening of the frame of insulating foam in fluid form in the at least one chamber, said at least one opening and at least one further opening of the frame allow escape of air from the chamber.

The advantage of the invention is that the insulating foam virtually automatically flows through the subsequent foaming in the circumferential direction successive chambers without a difficult shortening of a prefabricated or subsequently injected insulation foam core is necessary. Furthermore, window builders are accustomed to deal with foams, since window frames are often foamed with a mounting foam even during their installation. Not least, it is beneficial that the foaming of the complete frame is done in one operation. This saves handling costs. In principle, these are also eliminated by the shortening of an insulating foam core, which is no longer necessary.

Basically, the foaming can be done by means of any foams, expedient are multi-component foams, in particular polyurethane foams.

The individual components of the foam can be introduced via separate metering pumps in the intended chamber, preferably simultaneously, so that the mixing of these components takes place in particular at the time of introduction into the auszuschäumende chamber. By a corresponding reaction delay can be ensured that the curing of the foam begins only when the component mixture has been distributed in the auszuschäumenden chamber, so that a complete and uniform foaming is guaranteed.

As far as above and below is spoken of the introduction of the foam or its components, this means the introduction of the foam in each type, so both the introduction of Einkomponentenschaumes in not yet foaming state, at the onset of foaming or delayed foaming, as well as the introduction of the foam components in a not yet mixed state, in an already mixed state, in a non-foaming state or in the case of incipient or delayed foaming.

In a further preferred embodiment, it is possible to work with fiber-reinforced foam. As a result, the resulting Dämmschaumkern also take over stabilization or carrying function, so that the installation of metal stiffening profiles is unnecessary.

In order to perform the foaming within a conventional window frame manufacturing method in the workshop of a window manufacturer, it is particularly proposed to keep the frame in a vertical position during foaming. It has proven to be advantageous to carry out the introduction of the foam in the region of a corner of the frame, so that the foam can be introduced in fluid form at high pressure in a sufficiently large cavity without the flow must be redirected.

Preferably, the introduction of the multi-component foam in the auszuschäumende chamber by means of a directed flow. As a result, the most uniform possible distribution of the foam is achieved in said chamber.

The introduction of this directed flow can also be done by means of an insertable into the auszuschäumende chamber flexible hose. By using a hose, the foam can be introduced with increased certainty deeper into the auszuschäumende chamber. It could also be worked with a filling opening outside the corners, since the flow is deflected in the hose.

It is also proposed to make the introduction of the foam in particular at the substantially vertical position of the frame from above. Due to gravity, the forming foam is then very well distributed in the auszuschäumenden chamber.

So that the foam which forms does not undesirably penetrate the filling opening to the outside again, the opening is closed after the filling of the foam by means of a plug.

Alternatively, a valve may be installed in the filling opening, such that the fluid can flow into the frame only in the filling direction but can not flow out. In addition, alternatively, a small cock can be mounted in the filling opening, which allows either the inflow and outflow or blocked.

It should be noted at this point that the introduction of the foam does not necessarily have to be done by external pressure or by gravity, but instead can be applied to another opening of the frame negative pressure, so that the foam or its components in the frame be sucked in.

It has proved to be further advantageous to rotate the frame after the introduction of the foam in the vertical plane. This favors the filling process and the uniform foaming. In the described rotation in the vertical plane is achieved in particular that the automatic foaming penetrates into all areas of the frame, and finally the vent opening is reached.

In order not to hinder the foaming, it is recommended to bleed the auszuschäumende chamber during foaming through at least one opening. Preferably, the venting takes place via a plurality of openings which are distanced from the filling opening, so that outgassing also remains ensured when the forming foam reaches one of these venting openings and thereby closes it.

It has proved to be beneficial to make the venting through openings to the top, so as to achieve a last consistent even foaming. At the same time, these openings serve to check that the frame has been completely filled with foam.

For particularly large frames and thus correspondingly long extensions of auszuschäumenden chambers is further proposed to provide the auszuschäumende chamber with at least one Fließwegbegrenzung with which the auszuschäumende chamber is divided in the axial direction of at least one hollow profile element. Such Fließwegbegrenzung may, if necessary, by introducing a plug, in particular a foam plug or the like. be generated. It is proposed to provide this plug in a hollow profile element before it is joined together with others to form a frame. In this way, two or more fluidically separate chambers, which follow one another in the circumferential direction of the frame, but separated by the foam plug, which also acts insulating.

Alternatively, it is proposed to foam two mutually parallel chambers separately from each other. If necessary, this can correspondingly increase the desired insulating effect.

As already discussed above, a preferred application for the method is the production of a door or window frame, ie a window frame or a sash. It is proposed to arrange for the introduction of the multi-component foam as well as for the venting of auszuschäumenden chamber openings in a groove extending outside of the hollow profile elements groove or fold. Since such hollow profile elements are provided with grooves or folds, in which in particular fittings or the glazing or other filling are installed, said openings can be invisibly covered in a finished window.

It should be mentioned that in the production of a window sash, the frame is preferably filled without glazing.

If, moreover, a corresponding frame is made in a known manner with a metal rail reinforcing it, it is proposed that this metal rail be perforated. As a result, the foaming insulation foam or the like without the formation of voids. be embraced and so a uniform insulation over the entire length can be achieved with simultaneous intimate connection of Dämmschaumkern and metal rail.

• 1 eine Prinzipskizze eines auszuschäumenden Rahmens in einer ersten Stellung;
• 2 eine Prinzipskizze eines auszuschäumenden Rahmens gemäß 1 in einer zweiten Stellung;
• 3 Schnitt durch ein Hohlprofilelement mit einem ausgeschäumten Dämmschaumkern;
• 4 Querschnitt durch ein Hohlprofilelement mit einem ausgeschäumten Dämmschaumkern und einem von diesem eingeschlossenen Aussteifungsprofil.

Further advantages and features of the invention will become apparent from the following description of an embodiment and from the drawing. Showing:

• 1 a schematic diagram of auszuschäumenden a frame in a first position;
• 2 a schematic diagram of auszuschäumenden a frame according to 1 in a second position;
• 3 Section through a hollow profile element with a foam-filled insulating foam core;
• 4 Cross section through a hollow profile element with a foam-filled insulating foam core and a stiffening profile enclosed by this.

1 shows a frame 1 made up of several hollow profile elements 2 - 5 composed. The individual hollow profile elements are at their ends via corresponding miter cuts 6 welded.

The hollow profile elements are preferably made of a plastic such as PVC and have in their interior parallel to their longitudinal extent at least one chamber 7 on.

When joining two mitred hollow section elements are held with their oblique cutting edges laterally to a heating sword and heated in the region of these cutting edges. After removal of the heating sword, the cut edges are then pressed together, whereby they firmly connect with each other and wherein the corresponding chambers 7 be connected together in the adjacent hollow profile elements.

In the example shown here, one ultimately obtains a substantially quadrangular frame, in which by the corresponding chambers 7 an inner circumferential closed channel is formed. Except straight hollow profile elements, but it is also possible to use curved hollow profile elements, for example, for a bow window.

The frame shown is brought into a vertical position and in the area of a then overhead corner with a hole 8th provided in the chamber 7 empties.

One recognizes that the bore 8th in the region of the axial extent of the hollow profile element 4 in the hollow profile element 3 is introduced, wherein it is in its axial extent with the downwardly extending central axis of the chamber 7 within the hollow profile element 4 about aligned.

In the chamber 7 gets through the hole 8th through a multi-component foam introduced in particular by means of a flexible hose in a predetermined amount. The foam components are only when introduced into the chamber 7 or shortly before mixed with each other, wherein only after a certain time delay, a reaction of the various components is done together, which leads to the desired foaming and subsequent curing. During this time, the various components of the multi-component foam to be generated flow in a directed flow through the chamber 7 in the hollow profile element 4 down into the chamber of the hollow profile element 5 and possibly also in the chamber of the hollow profile element 2 ,

The introduced multi-component foam is, for example, a PU foam, which can also be mixed with glass or carbon fibers, which lead to a fiber reinforcement of the insulating foam core formed during foaming.

After a predetermined amount of components for the multi-component foam in the chamber 7 was introduced, the hole is 8th with a stopper 9 closed and the frame 1 is rotated in its vertical plane by about 90 °, as in the 2 is shown. With this comes the corner of the frame with the opening 8th and the plug therein 9 to lie in an underlying position. The previously horizontally oriented hollow profile elements 3 and 5 get into a vertical orientation and the previously vertically aligned elements 4 and 2 get into a horizontal orientation. At the same time reach three mutually distant vents 10, 11, 12 in an overhead position, suitably in a position that is reached by the foam last.

After the above-mentioned time delay then develops from the introduced components of the multi-component foam of the insulating foam within the chamber 7 , fills them gradually and forms an insulating foam core filling the entire frame.

In this foaming, the in the chamber 7 displaced air and escapes through the overhead, spaced apart vents 10 - 12 ,

In the 3 and 4 are sections shown by frame according to the invention. These frames are frames 13 . 14 and around door or window sashes 15 . 16 ,

In the cuts you can see that both the frame 13 . 14 as well as the casements 15 . 16 with folds 18 respectively. 19 and grooves 20 or with grooves 21 are provided. In these folds or grooves end the above-mentioned holes 8th or vents 10 - 12 because they are in areas that are not visible when a window is installed. In the grooves 20 while a window sash standard fittings are mounted, the corresponding openings additionally cover.

In the 3 and 4 one recognizes that the internal chambers 7 by an insulating foam core filling it to the contour 22 are filled, which is formed by an expanded multi-component foam, as described above in the circumferential chamber 7 was introduced.

In the 4 you also recognize that in these chambers 7 metallic stiffening profiles 23 . 24 were inserted, which contribute to an additional mechanical rigidity of the illustrated hollow profile elements. In particular, in the in the 4 box-shaped stiffening profile shown below 24 you realize that there are numerous holes 25 having. Through these holes, the individual components of the multi-component foam can pass through and then foam the interior of the stiffening profile and connect this intimately with the frame.

The invention described herein is a method for quickly, inexpensively and safely producing a window or door frame well insulated over its full extent.

Claims (19)

Method for producing a door or window frame (1) from hollow profiled elements (2, 3, 4, 5) having at least one chamber (7) which contains an insulating foam core (22), wherein the frame (1) consists of several successive hollow profiled elements (2 , 3, 4, 5), characterized in that first the hollow profile elements (2, 3, 4, 5) are connected to a frame (1) and thereafter through at least one opening (8) of the frame (1) of the insulating foam in fluid form into which at least one chamber (7) is filled, said at least one opening (8) and at least one further opening (10, 11, 12) of the frame (1) allowing air to escape from the chamber (7). allow. Method according to Claim 1 , characterized in that the foaming takes place by means of a multi-component foam, in particular a polyurethane foam. Method according to Claim 1 , characterized in that the foaming takes place by means of a fiber-reinforced foam. Method according to Claim 1 , characterized in that the frame (1) is in a vertical position during foaming. Method according to Claim 1 , characterized in that the introduction of the foam in the region of a corner of the frame (1). Method according to Claim 1 , characterized in that the introduction of the foam into the at least one chamber (7) by means of a directed flow. Method according to Claim 1 , characterized in that the introduction of the foam takes place from above. Method according to Claim 1 , characterized in that the introduction of the foam by means of a in the at least one chamber (7) insertable flexible tube takes place. Method according to Claim 1 , characterized in that after the introduction of the foam, the opening provided therefor (8) by means of a plug (9) is closed. Method according to Claim 1 , characterized in that the opening (8) has at least one valve. Method according to Claim 1 characterized in that the introduction of the foam takes place by suction on said further opening (10, 11, 12). Method according to Claim 1 , characterized in that the frame (1) is rotated after introduction of the foam in the vertical plane, preferably in such a way that the opening (8) provided for introduction reaches an underlying position. Method according to Claim 1 , characterized in that the venting via a plurality of spaced-apart openings (10, 11, 12) takes place. Method according to Claim 1 , characterized in that the venting takes place upwards. Method according to Claim 1 , characterized in that in the at least one chamber (7) a flow path limitation is provided, with which the chamber (7) in the axial direction of a hollow profile element (2, 3, 4, 5) is divided. Method according to Claim 1 , characterized in that the opening (8) for the introduction of the multi-component foam (8) and / or the opening for the vent (10, 11, 12) of the at least one chamber (7) in an outside of a hollow profile element (2, 3 , 4, 5) extending groove (20, 21) or fold (18, 19) are arranged. Method according to Claim 1 , characterized in that the frame (1) is a window sash (15, 16), which is filled without glazing. Method according to Claim 1 , characterized in that in the at least one chamber (7) prior to assembly of the hollow profiles (2, 3, 4, 5) stiffening profiles (24) are introduced. Method according to Claim 16 , characterized in that the stiffening profiles (24) are perforated.

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