DE102020117198A1 - Process for the production of a composite profile and composite profile - Google Patents

Abstract

A method for producing a composite profile (1) comprises the following steps: providing at least two metal profiles (2, 3) which are extruded or produced by roll forming; Connecting at least one insulating profile (4) to the at least two metal profiles (2, 3) to form a unit, with at least one hollow chamber (5) being formed between the at least two metal profiles (2, 3), in which a material (7 ) is arranged, painting an outer surface of the unit consisting of the at least two metal profiles (2, 3) and the at least one insulating profile (4) and subsequent drying by heating and simultaneous foaming of the material (7) that foams under the action of heat in order to at least partially fill out the at least a hollow chamber (5). The invention also relates to a composite profile produced in this way.

Description

The present invention relates to a method for producing a composite profile and a composite profile according to the preamble of claim 12.

the DE 195 04 601 A1 discloses a thermally insulated composite profile for a window, door or facade construction with two spaced apart metal profiles which are connected to one another via insulating webs. A thermal insulation material is arranged in a hollow chamber of the composite profile and is enclosed in a casing in a compressed form. The envelope can be destroyed by the action of heat, so that the thermal insulation material arranged in the envelope can foam up and fill the hollow chamber. The disadvantage of this composite profile is that the thermal insulation material has to be introduced into the envelope, which is then glued to the insulating web or the metal profile. After the envelope has been destroyed by the action of heat, the hollow chamber is filled with foam, the foam body hardening and, if the amount of thermal insulation material is too large, the composite profile can be deformed in the area of the insulating webs. Despite the good thermal insulation of such a composite profile, this has not been able to establish itself in practice.

In order to avoid the entry of moisture into vehicle parts, it is from the EP 2 922 900 B1 known to use a thermally expandable mass that closes the cavity.

It is therefore the object of the present invention to provide a method for producing a composite profile and a composite profile in which the composite profile has a high level of thermal insulation and can be produced effectively.

This object is achieved with a method with the features of claim 1 and a composite profile with the features of claim 12.

In the method according to the invention, at least two metal profiles extruded or produced by roll forming are provided, which are connected via at least one insulating profile, with at least one hollow chamber being formed between the two metal profiles in which a material that foams under the action of heat is arranged. Subsequently, an outer surface of the unit consisting of the at least two metal profiles and the at least one insulating profile is painted and then dried with the supply of heat, with the drying simultaneously causing the foaming of the material that foams under the action of heat to at least partially fill the at least one hollow chamber. The use of a material that foams up under the action of heat has the advantage that the foaming process can be initiated in a targeted manner at a predetermined temperature and, according to the invention, the heat is introduced when the applied paint is drying, in which the unit made up of the at least two metal profiles and the at least one insulating profile the application of particles is heated anyway in order to dry the applied paint, for example powder paint, and optionally to cure it. In this respect, the foaming of the material in the at least one hollow chamber can take place without an additional process step. The material, which foams up under the action of heat, does not have to be arranged in an envelope, but is fixed directly to the insulating strip and / or one of the metal profiles. As a result, the at least one hollow chamber can be foamed with high reproducibility.

Preferably, when drying the unit made of the at least two metal profiles and the at least one insulating profile, which is painted on the surface, it is heated to a temperature between 120.degree. C. to 200.degree. The temperature threshold at which the material, which foams up under the action of heat, foams by means of a corresponding chemical reaction, preferably lies in this range. This temperature is preferably lower than a softening temperature of the at least one insulating profile, which is preferably made of plastic and can have a temperature resistance of at least 140.degree. C., in particular at least 200.degree.

In a preferred embodiment, the at least one hollow chamber is filled to at least 80% when the material which foams up under the action of heat is foamed. As a result, a high level of thermal insulation is achieved in the composite profile. To avoid pressure from the foaming, the hollow chamber can be filled between 80% and 95%. Complete filling of the hollow chamber is possible, but not absolutely necessary for good thermal insulation.

In the method, at least one end face of the unit composed of the at least one metal profile and the at least one insulating profile is preferably closed by means of a cover element prior to drying and foaming. The hollow chamber is preferably closed by a cover on the opposite end faces, whereby the closure does not have to be airtight, but rather an escape of air or gases during foaming can be made possible through gaps or a ventilation opening. To control the air flow, at least one ventilation opening can be provided on each cover element, from which a gas escapes during foaming, so that a pressure build-up in the at least one hollow chamber is reduced during foaming.

The unit of the at least two metal profiles and the at least one insulating profile can, for example, have a length between 4 m to 8 m, preferably about 6 m, and is closed on the opposite end faces before drying, in particular before painting. After drying and foaming, the cover elements are then removed in order to be able to further process the composite profile produced in this way.

For an effective production of the composite profile, two spaced-apart strips made of a material that foams under the action of heat are preferably provided in the at least one hollow chamber. The strips can optionally be attached to an insulating profile or a metal profile, for example by gluing. However, it is particularly preferred to fix a strip of a material that foams under the action of heat by coextrusion to at least one insulating profile, so that the insulating profile can be processed as a unit together with the foaming material. The insulating profile can be introduced into a groove in the metal profile with opposite edges and fixed there by clamping.

To reduce the volume of a foam body in the at least one hollow chamber and thus to compensate for manufacturing tolerances, recesses, openings or profiles can be made in the material that foams under the action of heat in order to keep excess pressure low during the foaming process.

In the composite profile according to the invention, an outer surface of at least two metal profiles and the at least one insulating profile is painted, in particular on the entire outer surface, and in the at least one hollow chamber there is at least one foam body made of a material foamed under the action of heat, which at least partially fills the hollow chamber. As a result, a foam body can be generated via the material that foams under the action of heat, which ensures a high level of thermal insulation of the composite profile when it is installed on a building envelope. Furthermore, the at least one insulating profile can be glued to at least one metal profile via the foam body, which increases the strength of the composite profile.

The at least one foam body is preferably designed to be elastic and can be reversibly compressed by at least 10%, in particular at least 20%, of a volume. Such a high elasticity is advantageous in order to reliably avoid deformation of the composite profile during foaming. The insulating profiles made from a hard plastic can thus have the same shape before and after foaming, since even when the hollow chamber is completely filled with the foam body, it can be compressed if necessary. The foam body preferably contains ethylene vinyl acetate (EVA) and / or a rubber in order to be sufficiently elastic. The thermally expandable material preferably has an expansion rate of over 1000% and can, for example, be designed as shown in FIG EP 2 922 900 B1 which is hereby incorporated by reference.

The at least one foam body preferably fills the at least one hollow chamber by less than 98%, preferably between 70% to 95%. This allows small spaces to remain in the hollow chamber, which makes it easier for air or gas to escape when the foam is filled.

The composite profile according to the invention preferably comprises two metal profiles which are connected to one another via two insulating profiles. In this case, two spaced or interconnected foam bodies can be provided in the hollow chamber, which are produced by foaming, for example, two strips of a material that foams under the action of heat.

The foam body preferably glues at least one insulating profile to one of the metal profiles and counteracts any displacement between the insulating profile and the metal profile. As a result, further measures to avoid a displacement of the insulating profile relative to the metal profile can be dispensed with, for example, if the bonding is sufficiently strong, a tie wire can be dispensed with, which is inserted into the groove of the metal profile before the groove walls against the web of the engaging in the groove Isolation profile are rolled on.

The foam body can be made from a cross-sectionally rectangular, T-shaped or other profile. By designing the material in a T-shape before foaming, the outer surface of the material is enlarged compared to a rectangular design and can therefore absorb an external temperature more quickly when the composite profile is heated for the drying process.

The composite profile according to the invention is preferably used for frames such as those used in windows, doors, facades or light roofs.

• 1 eine perspektivische Ansicht eines erfindungsgemäßen Verbundprofils;
• 2 eine Ansicht des Verbundprofils der 1 vor dem Aufschäumen;
• 3 eine Explosionsdarstellung eines Isolierprofils mit einem aufschäumbaren Streifen;
• 4 eine Explosionsdarstellung des Verbundprofils der 2 vor der Montage;
• 5 eine Ansicht des Verbundprofils vor dem Aufschäumen;
• 6 eine Stirnseite des Verbundprofils nach dem Aufschäumen;
• 7 eine perspektivische Ansicht eines modifizierten Verbundprofils vor dem Aufschäumen;
• 8 eine Isolierleiste mit einem aufschäumbaren Streifen für das Verbundprofil der 7;
• 9 und 10 zwei Ansichten eines modifizierten Isoliersteges mit einem aufschäumbaren Material;
• 11 und 12 zwei Ansichten eines weiteren erfindungsgemäßen Verbundprofils bei der Montage, und
• 13 und 14 zwei Ansichten eines Verbundprofils gemäß einem weiteren Ausführungsbeispiel.

The invention is explained in more detail below on the basis of several exemplary embodiments with reference to the accompanying drawings. Show it:

• 1 a perspective view of a composite profile according to the invention;
• 2 a view of the composite profile of the 1 before foaming;
• 3 an exploded view of an insulating profile with a foamable strip;
• 4th an exploded view of the composite profile of 2 before assembly;
• 5 a view of the composite profile before foaming;
• 6th an end face of the composite profile after foaming;
• 7th a perspective view of a modified composite profile before foaming;
• 8th an insulating strip with a foamable strip for the composite profile of the 7th ;
• 9 and 10 two views of a modified insulating web with a foamable material;
• 11th and 12th two views of a further composite profile according to the invention during assembly, and
• 13th and 14th two views of a composite profile according to a further embodiment.

A composite profile 1 includes two metal profiles 2 and 3 , for example extruded aluminum profiles or rolled profiles made from sheet metal. The two metal profiles 2 and 3 are about two spaced apart insulating profiles 4th made of plastic interconnected so that between the two insulating profiles 4th and an inside of the metal profiles 2 and 3 a hollow chamber 5 is trained. Instead of a single hollow chamber, several hollow chambers can also be formed, as can the metal profiles 2 and 3 as well as the insulating profiles can optionally comprise hollow chambers.

In the hollow chamber 5 are two foam bodies 6th arranged that the volume of the hollow chamber 5 largely fill in, for example in the range between 70% to 100%, in particular 80% to 95%. The two foam bodies 6th are each with an insulating profile 4th and a surface of the metal profiles 2 and 3 connected, for example by gluing, joining or coextruding.

The foam body 6th are preferably made of an elastically compressible material that contains, for example, ethylene vinyl acetate (EVA) and / or rubber. The foam body 6th consist of an original material that foams when exposed to heat, with an increase in volume by a factor of at least 5, preferably at least 10, taking place.

In 2 is the composite profile 1 before foaming to form the two foam bodies 6th shown. On every insulating profile 4th is a strip of an intumescent material 7th held, which has a significantly smaller volume than the later foam body 6th . The hollow chamber 5 is therefore mostly empty and therefore still has poor thermal insulation between the two metal profiles 2 and 3 .

In 3 are an insulating profile 4th and a strip of an intumescent material 7th shown. The insulating profile 4th is strip-shaped and comprises edges on opposite longitudinal sides 40 , each with one of the two metal profiles 2 and 3 get connected. There is a recording in a central area 41 on which the strip made of a material that foams under the action of heat 7th is determined, for example by gluing or joining. Instead of gluing, the strip made of the foaming material and the insulating profile can be used 4th are produced in a co-extrusion process.

After making two insulating profiles 4th with a strip of a material that foams when exposed to heat 7th can the edges 40 the insulating bars in a groove 20th or 30th on one of the metal profiles 2 or 3 like this in 4th will be shown. The insulating profiles can then be rolled up or using another fastening technique 4th on the metal profiles 2 and 3 be fixed.

The insulating profiles 4th can in addition to rolling on the groove walls of the groove 20th or 30th also about the foam body 6th on the metal profiles 2 and 3 be fixed. By gluing the foam body 6th can cause a shift between the insulating profile 4th and the metal profile 2 or 3 be counteracted.

In a next step, a prefabricated composite profile according to 2 before lathering with covers 10 closed at the front, as shown in 5 is shown. The cover 10 covers one end face with the hollow chamber 5 of the composite profile 1 and embraced with two legs 12th an end portion of the composite profile 1 . The two legs 12th can use fasteners, such as screws 13th , on the composite profile 1 be fixed. At least one cover 10 , optionally also on both covers 10 , can be a bracket 11th be provided in the form of an eyelet around the composite profile 1 to be fixed hanging on a conveyor. The composite profile 1 also on two brackets 11th be fixed to a conveyor for transport.

The cover 10 can also be attached to the composite profile using other fastening mechanisms 1 be fixed, for example at least one plug on the cover 10 be formed in the hollow chamber 5 or the hollow chambers on the metal profiles 2 and 3 is inserted in order to be fixed there by clamping or locking. This allows the cover 10 can be assembled by a simple inserting process before drying, leaving the outer surface of the composite profile 1 not through the cover before drying 10 is covered.

That about the covers 10 composite profile closed at the end faces 1 can now be painted on one side. For this purpose, the two metal profiles are first placed on an outer surface 2 and 3 and the insulating profiles 4th a lacquer or paint particles are applied, which are then dried after application and baked on the surface. When drying, the composite profile 1 thus heated to a temperature between 120 ° C to 200 ° C in order to apply the coating to the composite profile 1 to fix. This warming is used to make the strips of a material that foams under heat 7th to activate and initiate the foaming process. This means that the composite profile can foam up at the same time as drying 1 respectively.

In 6th is an end face of the composite profile 1 after removing the cover 10 shown, which can be used for a further coating process. In the hollow chamber 5 (Number is missing in 6th ) are now two foam bodies 6th arranged, which are optionally provided separately from one another or can also be connected to one another. The hollow chamber 5 can largely through the foam body 6th be filled in, for example between 70% and 100%. The composite profile produced in this way can be cut off in a front end area and delivered to a processor in order to produce windows, doors, facades or light roofs.

7th shows a modified composite profile in which the strips are made of a material that foams under the action of heat 7th with cutouts 70 are provided. This can increase the volume of the foam body 6th be reduced to an overpressure when foaming the hollow chamber 5 to reduce or avoid. As in 8th shown, the strip can with the recesses 70 be provided and on the insulating profile 4th be fixed.

In the 9 and 10 Another embodiment of an insulating bar is shown in which, instead of a strip, several blocks arranged at a distance from one another 71 are provided from a material that foams when exposed to heat. These blocks 71 are at a predetermined distance on the insulating profile 4th fixed, especially glued, and by the size of the blocks 71 and their distance can be the subsequent volume of the foam body 6th can be set.

In the 11th and 12th a further embodiment of a composite profile is shown during assembly, the strip being made of a material that foams under the action of heat 7th not on an insulating profile 4th , but on the metal profile 3 on the to the hollow chamber 5 turned side is fixed. Here, too, two strips are provided which, under the action of heat, then form foam bodies 6th form. The attachment to the metal profiles 2 and 3 has the advantage that the initiation of foaming is easier because the introduction of heat reaches the strip more quickly during drying. There is also the advantage that when foaming the metal profiles 2 and 3 through the foam body 6th are completely covered, which increases the thermal insulation.

In 13th is a further embodiment of a composite profile 1 shown in which the heat-foaming material 7th is not designed as a strip with a rectangular cross-section but as a T-profile that has a first web 17th has, which is parallel to the insulating web 4th extends and a second web 18th has, which is substantially at right angles to the first web 17th into an interior of the hollow chamber 5 extends. This configuration makes the outer surface of the material 7th increased and absorb an external temperature more quickly when the composite profile is heated for the drying process. In addition, there is a more homogeneous distribution of the foam body formed 6th in the hollow chamber 5 achieved.

In order to fix the material 8, which foams under the action of heat, as a T-profile, on the insulating web 4th according to 14th integrally formed retaining webs 19th provided that the first web 17th grip around one edge at an angle.

The material that foams when exposed to heat 7th can also have a different cross-sectional shape, which allows a uniform foaming of the hollow chamber 5 enables.

List of reference symbols

1

Composite profile

2

Metal profile

3

Metal profile

4th

Insulating profile

5

Hollow chamber

6th

Foam body

7th

material

10

cover

11th

bracket

12th

leg

13th

screw

17th

first bridge

18th

second bridge

19th

Holding bridge

20th

Groove

30th

Groove

40

edge

41

admission

70

Recess

71

block

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 19504601 A1 [0002]
• EP 2922900 B1 [0003, 0014]

Claims (19)

Process for the production of a composite profile (1) with the following steps: a) providing at least two metal profiles (2, 3) which are extruded or produced by roll forming; b) connecting at least one insulating profile (4) with the at least two metal profiles (2, 3) to form a unit, with at least one hollow chamber (5) being formed between the at least two metal profiles (2, 3) in which a material that foams under the action of heat (7) is arranged; c) painting an outer surface of the unit composed of the at least two metal profiles (2, 3) and the at least one insulating profile (4), and d) drying the applied paint on the outer surface of the unit of the at least two metal profiles (2, 3) and the at least one insulating profile (4) by supplying heat and simultaneous foaming of the material (7) which foams under the action of heat to at least partially fill the at least one Hollow chamber (5). Procedure according to Claim 1 , characterized in that when the unit of the at least two metal profiles (2, 3) and the at least one insulating profile (4) is dried, it is heated to a temperature between 120 ° C to 200 ° C. Procedure according to Claim 1 or 2 , characterized in that the at least one insulating profile (4) is made of plastic and has a temperature resistance of at least 140 ° C, in particular at least 200 ° C. Method according to one of the preceding claims, characterized in that during the foaming of the material (7) which foams under the action of heat, the at least one hollow chamber (5) is filled to at least 80%. Method according to one of the preceding claims, characterized in that before drying and foaming, at least one end face of the unit made of the at least two metal profiles (2, 3) and the at least one insulating profile (4) is closed by a cover element (10). Procedure according to Claim 5 , characterized in that the hollow chamber (5) is closed on opposite end faces in each case by a cover element (10). Procedure according to Claim 5 or 6th , characterized in that the at least one cover element (10) has at least one ventilation opening (14) from which a gas escapes during foaming. Method according to one of the preceding claims, characterized in that two spaced-apart strips made of a material (7) which foams under the action of heat are provided in the at least one hollow chamber (5). Method according to one of the preceding claims, characterized in that the material which foams up under the action of heat is designed in strip form and is fixed to the at least one insulating profile (4) by coextrusion. Method according to one of the preceding claims, characterized in that the material (7) which foams up under the action of heat is designed as a strip on which recesses (10), openings or profiles are made before foaming. Method according to one of the preceding claims, characterized in that the material (7) which foams up under the action of heat is arranged on opposite sides of the hollow chamber (5) before foaming. Composite profile with at least two metal profiles (2, 3) produced by extrusion or roll forming which are connected to one another via at least one insulating profile (4) and between which at least one hollow chamber (5) is formed, characterized in that an outer surface of the metal profiles (2 , 3) and the at least one insulating profile (4) is painted and the at least one hollow chamber (5) is at least partially filled with at least one foam body (6) made of a material (7) that foams under the action of heat. Composite profile according to Claim 12 , characterized in that the at least one foam body (6) is elastic and is reversibly compressible by at least 10% of the volume. Composite profile according to Claim 12 or 13th , characterized in that the at least one foam body (6) contains ethylene vinyl acetate (EVA) and / or rubber. Composite profile according to one of the Claims 12 until 14th , characterized in that the at least one foam body (6) fills the at least one hollow chamber (5) to less than 98%, preferably between 70% to 95%. Composite profile according to one of the Claims 12 until 15th , characterized in that the composite profile (1) has two metal profiles (2, 3) which are connected to one another via two insulating profiles (4). Composite profile according to one of the Claims 12 until 16 , characterized in that the Foam body (6) glued at least one insulating profile (4) to one of the metal profiles (2, 3) and counteracts a displacement between the insulating profile (4) and the metal profile (2, 3). Composite profile according to one of the Claims 12 until 17th , characterized in that the foam body (6) is made from a profile with a T-shaped cross-section. Frame for a window, a door, a facade construction or a light roof, with a composite profile (1) according to one of the Claims 12 until 17th .

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