NO834400L - PROCEDURE FOR PREPARING HEAT-INSULATING PROFILES FOR WINDOW FRAMES OR SIMILAR, METAL PROFILE FOR USE BY THE PROCEDURE AND SEPARATION TOOL FOR IMPLEMENTATION OF THE PROCEDURE - Google Patents

Abstract

1. Method for the production of thermally-insulated composite sections for window frames or the like, which have at least two metal section parts (1, 2), which are connected with each other through at least one intermediate piece (15) of thermally insulating material, in which the two metal section parts are firstly integrally connected with each other by at least one connecting cross-piece (3) of the same material, and at least one channel (11), preferably open to the exterior, being formed and being filled with the thermally insulating material forming the intermediate piece, and in which, after hardening of the insulating material, the connecting cross-piece is separated at predetermined, weakened separation points (20) and removed, characterised in that the connecting cross-piece is continuously subjected to a tensile load, acting in the plane of the connecting cross-piece and transversely to its longitudinal extent, in the transition zone (20) between the connecting cross-piece and the metal section parts connected therewith in the longitudinal direction, and is thereby continuously separated from the metal section parts.

Description

The invention relates to a method for producing heat-insulating profiles for window frames or the like,

which profiles include at least two metal profile parts which are connected to each other by means of at least one intermediate part of heat-insulating insulating mass, the two metal profile parts being first connected uniformly to each other by means of at least one connecting step of the same material and thereby forming at least one preferably outwardly open channel which is filled with the insulating compound that will form the intermediate part, after which the connecting step is removed after the insulating compound has hardened.

Such a method is known in DE-AS 12 45 567. The removal of the connection step, however, presents problems when the composite profile is designed as a hollow profile, where two opposite sides of the cavity are formed by the metal profile parts and the other two mutually opposite sides of the cavity is formed by two intermediate parts of insulating material. By such a device,

see for example DE-OS 29 3 9 89 8, the connecting steps that form the gutter are located on the inside of the profile's cavity and are therefore not freely accessible. From DE-OS 29 39 898, it is known in this connection to remove the two opposite connecting steps in a chip-removing manner by means of a reaming needle, or by means of a draw mandrel which is provided with cuttings running across the longitudinal mid-plane. Moreover, from this publi-

tion, a separation method is known, whereby the ends of the connecting steps bent into the cavity can be grasped with pliers and then pulled out along a calculated breaking point formed during the production of the output profile. The known methods are associated with significant disadvantages. If tools with cutting edges are used, the tool requires a lot of maintenance, because you must constantly ensure that the cutting edges are sufficiently sharpened. In the latter method, in which the connection steps are mainly removed by shear force, there is a danger that the adjacent metal profile parts will at least be partially bent during the cutting, so that the shape-locking connection between the metal profile part and the intermediate

the part will be able to be at least partially loosened because the entire device in the separation area is subjected to a combined bending-shear force effect, so that here one does not get exactly definable stresses on the profile device.

From DE-OS 31 17 817, a method is known, in which the connecting steps, which form the gutter bottom, are connected to the metal profile in such a way that on both sides there remains a slot running in the longitudinal direction between the connecting step and the metal profile, into which slot one can enter a wedge-shaped separating tool intended for loosening the connecting step. The transition zone between the metal profile and connecting step in the gap area is also here designed as a calculated breaking point. The separation process with this known profile, however, occurs in such a way that the connecting step is torn off vertically on its plane from the metal profile, during which the wedge-shaped separating tool in the slot area rests both against the edge of the connecting step as well as against the metal profile. This means that part of the separation force acts directly on the steps that limit the chamber filled with insulating material. There is therefore a danger that these steps will be deformed and that this zone area will be stressed by stresses from the metal profile. This can have a negative impact on the force and form fit between the insulation mass filling and the metal profiles connected to it, and this can lead to the entire plastic joint and the two metal profile shells being displaced relative to each other during separation, because the metal profiles must also accommodate the guide of the separation tool necessary forces.

The purpose of the invention is to provide a method

of the initially mentioned type, which method has been improved so that the release of the connection step takes place on

a more favorable way. According to the invention, this is achieved by continuously subjecting the connection step in the transition area between the connection step and the metal profile parts connected to it to a tensile load across its length.

stretch and in the longitudinal direction and below continuously separated from the metal profile parts. With such a method, a definable stress on the overall profile is achieved, so that there will be a flawless separation of the connecting step without an unfavorable deformation of the metal profile parts. - It is appropriate to apply the tensile load simultaneously and symmetrically, so that the connecting step can be separated from the metal profile parts on both sides in one and the same workflow.

In a preferred embodiment of the invention, one proceeds in such a way that the tensile load is provided by deformation of bending profile parts which limit the connecting steps and are connected to the metal profile parts. With such a precisely definable deformation of parts of the remaining metal profile parts, with the help of the design of the bending profile parts, a clear tensile stress is achieved in the parting area, so that you can avoid accidental deformations that disturb the provided composite profile.

In a preferred embodiment of the method, it is further proposed that at the connection point, at a distance behind the separation point and continuously in accordance with the separation propagation, a transverse force is exerted to detach the connection step from the intermediate part of insulating mass. With the help of this effect on the already separated part of the connecting step, a proper detachment from the insulating mass is also effected in those cases when, during the casting of the gutter-shaped parts with insulating mass, it has occurred that these parts have not or only insufficiently been provided with a separating agent .

The invention also relates to a metal profile for manufacturing

of heat-insulating composite profiles for window frames or the like, for carrying out the method, which metal profile includes at least two metal profile parts which are uniformly connected to each other by means of at least one connecting step of the same material forming an open channel

for recording a heat-insulating insulating mass.

Such a metal profile as a starting profile for the production of heat-insulating profiles is known, for example, from DE-OS 29 39 898.

The new metal profile according to the invention is characterized by

that the metal profile parts at the transition point to the connecting step are provided with a respective bending flange projecting beyond the rear step surface, and that the wall thickness at the transition point between connecting step and bending flange is smaller than the wall thickness of the connecting step and of the bending flange in the transition area.

A metal profile designed in this way makes it possible to achieve an optimal design of the two profile parts with regard to the requirements placed on the composite profile, without having to take account of the separation due to the wall thickness in the individual areas. Such consideration is taken when dimensioning the bending flange, as it is dimensioned so thick that it can transfer the forces necessary for the detachment of the connecting step from the tool and to the transition point that forms the dividing line. At the same time, with an adapted design of the bending flange, it can be achieved that the forces acting on the flange during splitting do not have a deforming effect on the other metal profile part areas.

A further advantage is that after the separation of the bending flange and connecting step, a slightly larger space will appear as a result of the deformation of the bending flange, so that the connecting step can be taken out of the profile more easily. With a corresponding design, the transition point between the connecting step and the step-limiting bending flanges can be designed in cross-section so that the transition point forms a calculated breaking point and thus establishes a defined separation area.

In a preferred embodiment of the invention, it is proposed that the bending flanges should have a respective V-shaped cross-section,

where one leg ends at the metal profile part, while the other leg in the area between the top point and the free end is connected

with the connecting step, with a partial length of the free leg protruding over the back of the connecting step. Such a design of the bending flange allows for precisely defined lifting arm conditions by corresponding assignment of the transition point to the connection point, so that impacts on the metal profile parts can be unambiguously avoided. This is particularly possible when the wall thickness of the bending flange leg connected to the connecting step is smaller in the top point area than in the other areas. A further advantage associated with an approximately V-shaped bend in cross-section

flange is that it can at the same time be used for anchoring the intermediate step formed of insulating material and thus be included as an integrated and load-bearing component in the composite profile.

In a preferred embodiment of the invention it is further

in the longitudinal direction of the profile arranged guiding means for the tool for deforming the bending flanges. These guide means can either consist of an inserted guide rail for the tool or can, according to a preferred embodiment, be arranged on the back of the connecting step. The guiding means can consist of a step-shaped guide attachment which extends in the longitudinal direction of the profile. A guide attachment with a T-shaped cross-section would also be appropriate, which guide attachment simultaneously enables the detachment of the part of the connecting step already separated from the metal profile parts from the intermediate part made of insulating material.

The invention further relates to a separating tool for carrying out the method, with a pulling element with an associated tool head. According to the invention, the parting tool is designed so that the tool head - with respect to the flow direction - has a front guide part for abutment against the unparted profile, as well as a cone-shaped deformation part extended in the direction towards the rear tool end and acting against the bending flanges. This tool has the advantage that the reaction forces of the deformation forces acting on the bending flanges can be taken up via the tool by the profile areas that have not yet been detached, so that the separation does not strain the intermediate parts made of insulating material.

In a preferred embodiment, a longitudinal groove is arranged on the surface of the tool head facing the connecting step for receiving a guide shoulder on the connecting step or an inserted guide rail. This improves the absorption of the reaction forces to the deformation forces acting on the bending flanges, because such a designed tool will not stress the two metal profile parts when a corresponding profile is formed.

The invention shall be explained in more detail with reference to

the schematic drawings showing a number of design examples.

The drawings show:

Fig. 1 an output profile,

fig. 2-6 show the individual steps during the production of a composite profile starting from the front profile in fig. 1,

fig. 7 shows a work step according to fig.i 5 (separation of the connection step) in the case of a profile with a larger cross-

cut,

fig. 8, 9 and 10 show a composite profile in accordance with fig.

6, with different arrangements of heat-insulating spacers, fig. 11 shows another embodiment of a front profile,

fig.12 shows an elevation of a separation tool for production

of the composite profile in fig. 6,

fig.13 shows an end view of the tool in fig. 12, and fig. 14 shows a side view of the separating tool in fig. 12.

The one in fig. 1 shows a metal profile for manufacture in cross-section

of a heat-insulating composite profile mainly consists of two metal profile parts 1 and 2 which have been given an appropriate shape during adaptation to the calculated later application.

As this is only the connection area with the connection parts described in more detail below of heat-insulating insulation

mass which is of interest, the more detailed design for adaptation to the purpose of application is not shown in more detail.

The two metal profile parts 1 are symmetrical in the design example and are firmly connected to each other by means of two mutually parallel connecting steps 3 of the same material. The two metal profile parts 1 and 2 are further provided on their sides facing the connecting steps 3 with Jioldesteg 4 with associated bending flanges 5. The bending flanges 5 have an approximate V-shaped cross-section. One leg 6 of the V-shaped flange cross-section is connected to the holding step 4, while the other leg 7 is connected to the connecting step 3. The connection point between the leg 7 and the connecting step 3 is here in the area between the top point of the V and the free leg end , so that the free end of the leg 7 protrudes over the back side 8 of the connecting step. The other leg end, i.e. the end of the leg 7 which faces the metal profile part 1 or 2, here in the area at the top point 9 is given a reduced wall thickness compared to the other areas, so that a bending line that is unambiguous for the deformation occurs.

From the two metal profiles 1 and 2 and the connecting steps 3, a profile is formed which has two outwardly open channels 11. Towards the channels 11

the metal profiles 1 and 2 are provided with flanges 12 that project into the gutter opening, so that respective hook-shaped cross-sectional sections are formed in cooperation with the profile of the respective bending flanges 5.

The one in fig. The metal profile shown in 1 has it, for example, with the help of

of strand pressing provided output form.

Fig. 2 shows the next manufacturing step for manufacturing the composite profile. From the free edges of the flanges 12, several deflected projections 14 are bent out that scratch against the gutter bottom 13. Then, as shown in fig. 3 and 4, the channels 11 are successively filled with an insulating mass, for example by casting, this insulating mass forming the insulating middle parts 15 in the finished profile.

As shown in fig. 3 and 4, the respective transition area facing the intermediate parts 15 between the connecting step 3 and the bending flange leg 7 is designed so that there is an approximate V-shaped contour here, the connection between the leg 7 and the connecting step 3 here having its smallest wall thickness. The connecting step 3 also has, on its side facing away from the chute, a continuous, step-shaped guide shoulder 16. The meaning of this will be explained in more detail below. Furthermore, the connecting step 3 can have a further step-shaped projection 17 on its gutter bottom side, which allows for special design options for the finished profile, described in more detail below. As can be seen from fig. 3 entails the shaping of the bending flanges 5

and those that scratch deflected projections 14, which after casting the channel are embedded in the intermediate part 15, that a form-locking connection is formed between the two metal profile parts 1, 2 and the intermediate parts 15.

In order to now provide a heat-insulating profile, the connecting steps 3 must be removed, so that the only connection between the metal profile parts 1 and 2 is formed by the intermediate parts 15. This process is shown in more detail in fig. 5. After the insulating mass has hardened and thus solid intermediate parts 15 have formed

of the insulating mass, it is introduced into the profile, which now looks like in fig. 4, a parting tool. This tool is introduced into the cavity 17 and it usually consists of a pulling element which extends over the entire profile length and which carries a tool head. In the present case, the tool head consists, see fig. 12,

in the main of a wedge-shaped deformation part 18 as in fig.

5 is shown with its largest cross-sectional area. If such a tool head is pulled through the cavity 17, the wedge-shaped pointed side projections 19 will bend the free ends of the legs 7 of the bending flanges in the direction of the metal profile parts 1, 2. This causes the connection points 20 between the legs 7 and the connecting steps 3 (Fig. 3) to be subjected a defined tensile stress and that the connecting step is simultaneously separated from the two bending flanges 5. This deformation also means that in this area a small space 21 also occurs, so that the now separated connecting step 3 is free after the tool head

is pulled through and can be pulled out.

Since the connecting steps 3 have a respective step-shaped guide projection 16 directed into the cavity 17, which is assigned to a corresponding groove 2 2 in the tool head, the reaction forces occurring during the deformation of the bending flanges 5 will be transferred to the connecting step 3 via this guiding projection 16. If you now supply the tool head, see fig. 12, with a continuous guide part, the reaction forces via the guide projections 16 will be completely taken up by the part of the profile where separation has not yet taken place, so that during the separation of: the intermediate parts 15, which indeed form the only connection between the metal profiles 1 and 2, not recognized. Experiments have shown that by separating the intermediate steps 3 from an output profile as shown in fig. 1, i.e. without the stabilization via the intermediate parts 15, no reaction forces will be able to be transferred to the metal profile parts 1, 2 behind the separation point. In the case of a free-standing output profile as in fig. 1, no distance changes could be determined between the two metal profile parts 1, 2 after the splitting.

Fig. 6 shows the finished profile in cross-section.

Fig. 7 shows a profile with a larger cross-section, that is to say with a larger distance between the intermediate parts 15. The arrangement of the connecting steps 3 and the bending flanges 5 corresponds to that in fig. 1-6. The only difference is that the metal profile parts 1', 2' have extra guide projections 23 in the area of the cavity 17, and that the separating tool can rest against these guide projections, so that you can work with smaller tool heads. Here, too, the reaction force absorption takes place via a guide shoulder 16 on the connecting step 3 and a corresponding longitudinal groove 22 in the tool head. Fig. 8, 9 and 10 show advantageous design options for a composite profile of the type shown in Fig. 6. As can be seen from fig. 8, heat-insulating, strip-shaped spacers 24 can be inserted on one or both sides in the remaining free spaces in the bending flanges 5, so that heat transfer by radiation over the cavity 17 is also prevented,

from one metal profile part to the other.

In fig. 9, such an intermediate wall is drawn into the middle area, with the aid of a corresponding projection 17 on the connecting step 3 (Fig. 3) providing a channel-shaped recess in the intermediate parts 15. Fig. 10 shows a device where three inserted spacers are used 24. Fig. 11 shows a cross-sectional profile as in fig. 1, with the modification that the guide attachment 16' has a T-shaped profile cross-section. Otherwise, the profile corresponds to that shown in fig. 1. The tool head for separating the connecting steps 3 must, in this profile, be provided with a hammer head groove corresponding to the cross-sectional shape of the guide attachment 16', so that here too you get a cushion for absorption of reaction forces. In the case of a guide projection 16' designed in this way, however, the hammer head groove in the tool head is guided so that the distance between the hammer head-forming part of the groove and the surface of the tool head facing the connecting step - with regard to the flow direction - is greater in a distance behind the area of the deforming part 18, so that when the tool head is pulled through, forces will be exerted via the T-shaped shoulder 16' in the direction of the indicated arrows 25. These forces will, after the connecting steps 3 have been separated from the bending flanges 5, lift the connecting steps from the intermediate part 15.

Fig. 12 shows an elevation of a tool head 26 for machining a cross-sectional profile as in fig. 1. The tool head 26 is pulled in the direction of the arrow 27 (the flow direction) through the cavity 17 in the profile (fig. 4). For this purpose, the tool head is connected by a pulling element, not shown. On the upper side and the lower side, the tool head is provided with a longitudinal groove 22 for recording cooperation with the guide attachment 16 on the connecting step 3. The tool head 26 is divided into a front guide part 28 and a wedge-shaped towards the rear tool end extended deformation part 29. The one in fig. 5 shown cross-sectional surface corresponds to the section line V-V in fig. 12.

Fig. 13 shows a view in the direction of the arrow 30, and Fig. 14 shows a side view.

Claims (26)

1. Method for the production of heat-insulating composite profiles for window frames or the like, with at least two metal profile parts that are connected to each other with at least an intermediate part of a product insulating mass, where the two metal profile parts are first connected uniformly to each other by means of at least one connecting step of the same material and thereby forms at least one preferably outwardly open channel, the channel being cast with the insulating compound that is to form the intermediate part, and the connecting step removed after hardening of the insulating compound, characterized in that the connecting step is continuously subjected to a tensile load in the transition area between the connecting step and the metal profile parts connected to it across of the longitudinal extent and in the longitudinal direction and are thereby continuously separated from the metal profile parts. 2. Method according to claim 1, characterized in that the tensile load is applied simultaneously and symmetrically, so that the connecting step is separated from both metal profile parts in one and the same work step. 3. Method according to claim 1 or 2, characterized in that the tensile load is provided by a deformation of bending profile parts which limit the connection step and are connected to the respective metal profile parts. 4. Method according to one of the claims 1-3, characterized in that a transverse force is exerted on the connection step at a distance behind the separation point and continuously in accordance with the separation propagation to loosen the connection step from the insulating mass. 5. Metal profile for the production of heat-insulating profiles for window frames or the like according to the method in claims 1-4, with at least two metal profile parts that are uniformly connected to each other by means of at least one connecting step of the same material and form an open channel for receiving a heat-insulating mass , characterized in that the metal profile parts (1, 2) at the transition points (20) towards the connecting step (3) are provided with a respective bending flange (5) that projects over the rear step surface (8), and in that the wall thickness in the transition point (20) between the connecting step (3) and the bending flange (5) is smaller than in the connecting step (3) and in the bending flange (5) in the area at the transition point (20). 6. Metal profile according to claim 5, characterized in that the bending flanges (5) limiting the connecting step (3) at least on the rear side (8) of the step - seen in profile cross-section - are directed obliquely towards each other. 7. Metal profile according to claim 5 or 6, characterized in that in the area of the transition point (20) between the connecting step (3) and the adjacent bending flanges (5) it has a V-shaped contour course at least on the inside of the gutter. 8. Metal profile according to claim 5, 6 or 7, characterized in that the bending flanges (5) each have an approximately V-shaped cross-section if one leg (6) ends in the respective metal profile part (1, 2) and if the other leg (7) is connected to the connecting step (3) in the area between the top point and the free end of the leg, with a partial length of the free leg end projecting over the back of the connecting step (8). 9. Metal profile according to claim 8, characterized in that the wall thickness of the leg (.7) connected to the connecting step (3) is smaller in the top point area (9) than in the other areas. 10. Metal profile according to one of claims 7-9, characterized in that the bending flange leg (6) connected to the metal profile parts (1, 2) is connected to the metal profile parts by means of a respective holding step (4) running approximately at right angles to the bending flange (5) , as the top point of the V-shaped cross-section of the bending flange (5) protrudes above the surface of the connecting step (3) on the chute side. 11. Metal profile according to one of claims 5-10, characterized in that the two metal profile parts (1, 2) in their channel (11) limiting edge areas are provided in a manner known per se with a respective flange (12) projecting into the channel opening , and that the respective free flange edge over its length is provided with several projections (14) deflected like claws in the direction of the gutter bottom. 12. Metal profile according to one of claims 5-11, characterized in that continuous guiding means for a tool for deforming the bending flanges (5) are arranged in the longitudinal direction of the profile. 13. Metal profile according to claim 12, characterized by an inserted guide rail for the deformation tool. 14. Metal profile according to one of claims 5-12, characterized in that the back side (8) of the connecting step is provided with at least one longitudinally extending guide means for the deformation tool. 15. Metal profile according to claim 14, characterized in that the guide means on the connecting step (3) is designed as a step-shaped guide attachment (16). 16. Metal profile according to claim 14, characterized in that the guide means on the connecting step (3) is designed as a groove. 17. Metal profile according to claims 14 and 15, characterized in that the guide attachment (16 <1> ) has a T-shaped cross-section. 18. Metal profile according to one of claims 5-17, characterized in that the surface of the connecting step (3) which forms the gutter bottom is provided with a step (17) extending in the longitudinal direction of the step, preferably in the middle of the gutter. 19. Metal profile according to one of the claims 5-18, characterized in that the metal profile parts (1, 2) are connected to each other by means of two connecting steps (3) running at a distance from each other and parallel to each other, so that there are two outwards open chutes (11). 20. Composite profile produced from a metal profile according to claim 19, with at least two metal profile parts which are connected to each other by means of at least two intermediate parts of heat-insulating mass, characterized in that the two metal profile parts (1, 2) and the two intermediate parts (15) ) of insulating mass surrounded cavities (17) in its longitudinal direction are divided by at least one across the intermediate parts (15) directed intermediate wall (24) of an insulating material. 21. Profile according to claim 20, characterized in that an intermediate wall (24) is held by the mutually opposite bending flanges (5) on a metal profile part (1, 2). 22. Profile according to claim 20 or 21, characterized in that an intermediate wall (24) is drawn into channels in the insulating mass, which channels are designed with mutually opposite, longitudinally extending projections (17) on the separated connection steps (3). 23. Profile according to claims 20, 21 or 22, characterized in that at least two intermediate walls (24) are drawn in. 24. Separating tool for carrying out the method according to claims 1-4, for a metal profile according to claims 5-19, with a pulling element and an associated tool head, characterized in that the tool head (26) with respect to the flow direction (27) - has a front guide part (28) for abutment against the profile that has not yet been separated, and a wedge-shaped deformation part (29) extended towards the rear tool end, acting against the bending flanges (5). 25. Separating tool according to claim 24, characterized in that the surfaces of the tool head (26) facing the connecting step (3) have a longitudinal groove (22) for receiving a guide projection (16) on the connecting step (3) or one embedded in the profile guide rail. 26. Separating tool according to claim 25, characterized in that the longitudinal groove is designed as a hammer head groove, the distance between the hammer head part of the groove and the tool head surface facing the step being greater at a distance behind the deformation part, with regard to the direction of flow.