WO2018108268A1

WO2018108268A1 - Heat-insulated metal-plastic composite profiled section

Info

Publication number: WO2018108268A1
Application number: PCT/EP2016/081042
Authority: WO
Inventors: Franz Feldmeier
Original assignee: Franz Feldmeier
Priority date: 2016-12-14
Filing date: 2016-12-14
Publication date: 2018-06-21
Also published as: EP3555404B1; EP3555404A1

Abstract

The invention relates to a metal-plastic composite profiled section displaying reduced deformation under temperature differences, comprising an inner profiled section (2) made of metal, an outer profiled section (3) made of metal, and an insulating profiled section (4) made of plastic, comprising: a shear-resistant connection (6) which is form-fitting in the transverse tensile direction, between said insulating profiled section and inner profiled section; and a connection which is form-fitting in the transverse tensile direction and a connection (7) that can slide in the shearing direction, between said insulating profiled section and outer profiled section. The material of said insulating profiled section (4) has a modulus of elasticity of at least 10 GPa, preferably at least 20 GPa, in order to raise the flexural rigidity of the metal-plastic composite profiled section (1). The geometry of the insulating profiled section (4) comprises at least one transverse element (9a, 9b, 9c; 14) which extends perpendicularly to the transverse tensile direction.

Description

Thermally insulated metal-plastic composite profile

Field of the invention

The invention relates to a metal-plastic composite profile with reduced deformation at temperature differences.

State of the art

Thermally insulated composite profiles are used for frames of windows, doors or facades. It is between an outer profile of metal and an inner profile made of metal, an insulating profile or a plurality of individual Dämmstege to

thermal decoupling arranged to reduce the unwanted heat flow between the inner and outer profile. In conventional composite profiles is doing a

non-positive and therefore shear-resistant connection between the insulation profile and the inner and outer profile produced. The frictional connection generates a flexural rigidity of the composite profile, which for the removal of loads in

Traverse direction, e.g. is required for wind pressure or wind suction. The Querzugrichtung runs in the direction of the distance between the inner profile and outer profile, while the

Shear direction is perpendicular thereto.

Since the insulation profile between the metal profiles represents a thermal separation plane, the heat flow from the one

Metal profile limited to the other, however, arises in the production of a composite called shear-resistant composite profile with non-positive connection in

Direction of thrust and in Querzugrichtung between the

Dämmprofil and the metal profiles the difficulty that with a temperature difference between the composite profiles forming metal profiles, a deflection of the

Composite profiles done. The reason for this is that due to the greater length expansion of the metal profile with higher temperature a shear stress between the

Components of the composite profile results in due to the shear strength of the composite in a deflection of the

Composite profile towards the metal profile with the higher temperature affects.

Such a difficulty due to

Temperature differences occur, for example, in the winter between the inside of the room and the outside air, and in summer, as soon as the sunlight leads to an increase in temperature of the outer profile. These deformations are referred to as bi-metal effect, always act as a warp to the warmer side and affect the function of the component formed with the composite profile such. the window or the door. For example, it can lead to a difficult closing of windows and doors. Other possible difficulties may be restrictions on airtightness and watertightness. Finally, the

Deflection also be annoyingly visible on partition wall exclusions.

Several remedies have already been proposed in the prior art. On the one hand, the bi-metal effect can be reduced by reducing the temperature differences. This can be done firstly by the fact that the thermal separation is deteriorated, but this means increased heat loss in winter. In particular, the thermal insulation can be deteriorated by the application of local thermal bridges, whereby the temperature differences between the inner and outer profile is reduced and the associated change in length and deflection are reduced.

Another measure is to increase the IR reflection of the outer surface, which is effective for both summer and winter fall. The disadvantage of this measure However, it consists in the fact that the surface variants of the outer profile are limited to the building exterior.

Another alternative is to degrade the composite effect of the overall profile. On the one hand, this can be done by reducing the rigidity of the insulating webs, as described in DE 20 2012 003 730 Ul.

Another possible measure is described in DE 296 23 019 Ul. In the heat-insulated composite profile described therein, a sliding connection between the Dämmstegen and the metal profiles is provided to prevent deflection in uneven heating of the metal profiles.

However, all measures for the deterioration of the composite effect of the overall profile have the disadvantage that the flexural rigidity compared to a cross-sectionally identical

Composite profile, i. is significantly reduced with a shear-resistant bond between the insulation profile and the metal profiles.

Presentation of the invention

The invention has for its object to provide a thermally insulated metal-plastic composite profile, which has a reduced bi-metal effect at the same time sufficient flexural rigidity and thermal insulation.

This object is achieved by a metal-plastic composite profile with the features of claim 1. preferred

Embodiments follow from the remaining claims.

The metal-plastic composite profile according to the invention with reduced deformation at temperature differences between inside and outside comprises an inner profile of metal, a External profile of metal and an insulating profile made of plastic, with a shear-resistant connection and positive connection in Querzugrichtung between the insulation profile and the

Internal profile. Between the insulating profile and the outer profile there is a positive connection in Querzugrichtung and a schollweiche, i. sliding connection in thrust direction. The metal-plastic composite profile according to the invention further comprises a means for increasing the flexural rigidity of the metal-plastic composite profile, wherein the means for

Increasing the bending stiffness the following measure comprises:

The material of the insulating profile has an E-modulus of at least 10 GPa and preferably at least 20 GPa, more preferably of at least 40 GPa.

The temperature difference between inside and outside is the temperature difference between the outer profile and

Inner profile.

According to the invention, the flexural rigidity of

Metal-plastic composite profiles increased by this measure. An insulation profile is used which increases the height

Having stiffness. So can in the use of

glass fiber reinforced plastic (GRP) an E-modulus of up to 60 GPa or when using carbon fiber reinforced

Plastic (CFRP) an E-modulus of over 40 GPa can be achieved. Conventional materials for insulating profiles such as PA 6.6 GF25, AWS or PVC, on the other hand, have E-modules which are generally less than 5 GPa. By a Dämmsteg

is used, the modulus of elasticity is at least 10 GPa, an increased bending stiffness is already generated, which is further increased by the provision of at least one, extending perpendicular to the transverse direction transverse element on. The at least one transverse element extending perpendicular to the transverse pulling direction is a transverse web or transverse bulkhead. To achieve a sufficient Flexural required dimensions of the cross member depend on their number and distance from the center of gravity in order to obtain a sufficiently high flexural rigidity. The provision of transverse bulkheads also has the effect of reducing heat transfer by convection.

According to a preferred embodiment of the invention, the insulating profile consists of fiberglass. GRP (glass fiber reinforced plastic) has the significant advantage that common GRP materials with a glass fiber content of more than 40% and below

Use of conventional resins have a coefficient of thermal expansion at 25% to 50% of

Thermal expansion coefficient of thermoplastics is. This makes an insulating profile of GRP less sensitive to temperature-induced deformation at a high

Temperature difference in the insulation profile.

According to a preferred embodiment of the invention, the insulating profile on a first Dämmstegelement and a second Dämmstegelement, and the sliding connection between the insulating profile and outer profile comprises a sliding device close to the outer profile between the first Dämmstegelement and the second Dämmstegelement. In this way, the in

Thrust direction sliding connection in

Metal-plastic composite profile either completely or additionally in a sliding connection between the first

Insulating web element and the second Dämmstegelement laid, however, wherein the sliding device between the first Dämmstegelement and the second Dämmstegelement is located closer to the outer profile than on the inner profile and preferably in that third of the extension of the

Dämmprofils between inner profile and outer profile is adjacent to the outer profile. This preferred measure may be advantageous, since a sliding connection between the synthetic material of the Dämmstegs may be more effective than a sliding connection between the metal of the outer profile and the plastic of the Dämmelements. The connection between the Insulating profile and the outer profile can be performed in a conventional manner, ie with a shear-resistant connection and positive connection in Querzugrichtung and thus as the connection between the insulation profile and the inner profile.

By arranging the transverse webs so that their average position is closer to the outer profile than on the inner profile is achieved that the composite of inner profile and insulation profile receives a particularly high bending stiffness.

According to one embodiment of the invention, the insulating profile has at least one cavity and in each case a plurality of connection points to the inner profile and the outer profile. Through the use of a cavity and the resulting increased moment of inertia is the

Bending stiffness of the insulating profile and thus the

Flexural rigidity of the whole

Metal-plastic composite profiles further increased.

According to another possible embodiment of the invention, the insulating profile is a hollow profile with a plurality of transverse webs

formed and the transverse webs are arranged so that their average position is closer to the outer profile than the inner profile. In other words, the insulation profile can be several

Have transverse webs, which are arranged in total closer to the outer profile than the inner profile. This can be done by it

determine that with a plurality of transverse webs whose individual position is averaged and the geometrically averaged position is closer to the outer profile than the inner profile.

The provision of a layer with low emissivity on at least one of the transverse webs or at least one

Transverse bulkhead can further reduce the heat transfer according to a preferred embodiment.

Brief description of the drawings The invention will be described purely by way of example with reference to the accompanying drawings, in which

Fig. 1 shows schematically a first embodiment of

shows thermally insulated metal-plastic composite profile according to the invention;

Fig. 2 shows a variant of that shown in Fig. 1

Embodiment with two transverse webs shows;

Fig. 3 shows a variant of that shown in Fig. 2

Embodiment with a different shape of the insulating profile shows;

Fig. 4 shows a further embodiment of the invention below

Use of two separate Dämmstegen represents

Fig. 5 shows a variant of the embodiment of the invention according to Fig. 4;

Fig. 6 shows a further variant of the embodiment of

Invention of Figures 4 and 5; a variant of the embodiment of the invention of Fig. 4 shows;

Fig. 1 shows a variant of the embodiment of the invention according to Fig. 5; a variant of the embodiment of the invention of Fig. 6 shows; and

10 shows a further embodiment of the invention

represents.

Description of the Preferred Embodiments In the following figures are each the same

Elements labeled with the same reference numerals.

Fig. 1 shows a first embodiment of a

Metal-plastic composite profile 1, which consists of an inner profile 2, an outer profile 3 and an insulating profile 4 between the inner profile 2 and the outer profile 3.

Both the inner profile 2 as well as outer profile 3 are made of metal, with aluminum, steel, stainless steel, weatherproof steel or copper / brass are particularly preferred.

When using aluminum, this is preferred

anodized or coated. If steel is used, it is preferably galvanized, in particular strip galvanized

(continuously hot dip refined) or piece galvanized. Alternatively, the steel can also be coated, with either liquid paint or a powder coating can be used. However, it is also possible to treat the steel by means of a duplex method, i. both too

galvanize as well as to coat.

If stainless steel is selected for the inner profile and / or outer profile, then it can be bright, polished, ground or else dyed electrolytically. When using

Brass / copper this is preferably blank or pickled used.

Between the inner profile 2 and the insulating profile 4 a shear-resistant compound 5 is provided with Querzugtragfähigkeit. In other words, a firm connection will be in both

Arrow direction A (Querzugrichtung) and in a direction perpendicular to the plane of FIG. 1 (thrust direction) made. In contrast, between the insulating profile 4 and the outer profile 3, a shear-soft compound 7 with sufficient

Transverse tensile strength produced. In other words, with the help of a suitable positive connection, a connection in

Arrow direction A (Querzugrichtung) produced, whereas in a direction perpendicular to the plane of the Fig. 1

(Shear direction) the insulating profile 4 can slide relative to the outer profile 3.

Both the shear-resistant connection 5 and the push-soft connection 7 can via a positive connection in

Querzugrichtung be realized.

The compound 5 between the insulating profile 4 and the

Inner profile 2 and the connection 7 between the insulating profile 4 and the outer profile 3 can each have a

dovetailed guide 6 be configured. The connection 5 between the insulating profile 4 and the inner profile 2 can be provided with a knurling in the inner profile 2 for producing the shear-resistant connection 5. In contrast, the push-soft compound 7 also has a

Dovetail guide 6 can be realized, but without a knurling in the outer profile 3, a sliding in the

To allow longitudinal direction of the insulating profile perpendicular to the plane of FIG. 1.

To those reduced by the shear-soft connection 7

To at least partially compensate bending stiffness of the composite profile 1, the insulating profile 4 is made of a material with high rigidity, wherein the modulus of elasticity of the material is at least 10 GPa. For example, the insulating profile can be made of fiberglass, with this e-modules of up to 60 GPa can be achieved. When using a

Insulating profiles made of carbon fiber reinforced plastic can even achieve e-modules of more than 60 GPa. However, the achievable bending stiffness of the composite profile does not depend exclusively on the material of the Dämmprofils 4 but also of its geometry. Thus, in the embodiment of Fig. 1, the insulating profile 4 is formed with an H-shaped cross-section and has a transverse web 9a, which connects the two longitudinal webs IIa and IIb rigidly together. In conjunction with a shear resistant

Compound 5 to the inner profile rises through the crossbar 9a while the "Steiner share" designated distance to

Focus, so a support frame with elevated

Moment of inertia and thus to provide improved flexural rigidity.

In the embodiment of Fig. 2, a one-piece insulating profile 4 with two longitudinal webs IIa and IIb and two transverse webs 9a and 9b is shown. Otherwise, the embodiment of FIG. 2 corresponds to that of FIG. 1. Due to the ladder-shaped structure of the insulating profile 4 of FIG. 2, the bending solubility of the insulating profile is further improved. The

Providing a hollow chamber 12 between the transverse webs 9a and 9b improves the thermal insulation.

Both embodiments of FIG. 1 and FIG. 2 is

together that the transverse webs 9a and 9b averaged closer to the outer profile 3 than the inner profile 2 are arranged. Would you like the position of the transverse webs in Querzugrichtung A relative to the connections 6 between the insulating profile 4 and the

External profile 3 and between the insulating profile 4 and the

Consider inner profile 3, the sum of the distances between the individual transverse webs to the outer profile 3 would be less than the sum of the distances of the transverse webs to the inner profile 2. This measure serves to the insulating profile 4 by increasing the moment of inertia increased rigidity, especially in that area give, in which due to the push-soft connection 7 between the insulating profile 4 and the outer profile 3 is a reduced overall stiffness.

When using an insulating profile made of a material of high rigidity with an E-modulus of at least 10 GPa It is also possible to provide alternative geometries of the insulating profile. Thus, the insulating profile 4 also consist of individual Dämmstegen, each having a shear-resistant connection with the inner profile and a shear-soft connection with the

External profile are connected.

In the embodiment of FIG. 3, a so-called Ω-Dämmprofil 4 is shown, which improved by its increased width compared to the embodiment of FIG

Has properties, since the insulation profile 4 is flush with the metal profiles in the outer contour. In addition, the curvature of the longitudinal webs IIa, IIb increases their length in the drawing plane of FIG. 3, as a result of which the thermal insulation improves slightly with respect to the geometry according to FIG. Also in the embodiment according to FIG. 3, the transverse webs 9a, 9b are arranged closer to the outer profile 3 in order to increase the moment of inertia.

In the embodiments according to Figures 4,5 and 6 instead of transverse webs 9, 9a, 9b, transverse bulkhead 14 on the longitudinal webs 11 of the insulating profile forming Dämmstege 4-1 and 4-2 are provided which are also arranged eccentrically, as by the From the inner profile 2 complained transverse bulkhead 14 each increases the moment of inertia of the associated Dämmstegs 4-1, 4-2. The more transverse bulkheads 14 are provided, the higher the moment of inertia becomes.

In addition, the transverse bulkheads 14 constitute a barrier which reduces the heat flow due to radiation between the inner profile 2 and the outer profile 2. When two Dämmstege 4-1 and 4-2 as shown in Figures 4,5 and 6 are mirror images of each other designed and almost touch the transverse bulkhead, also almost closed hollow chambers 12 are formed, which further improve the thermal insulation. The almost closed hollow chambers obstruct the

Heat transfer by convection, as in the chambers a reduced temperature difference from transverse bulkhead to transverse bulkhead is present.

The embodiments according to FIGS. 7, 8 and 9 correspond to those according to FIGS. 4, 5 and 6 and additionally have at least one low-emissivity LE layer (low emissivity) applied either on one side or on both sides to the transverse bulkhead, which is glued either as a foil or sprayed as a varnish layer. The LE layers 15, 15a, 15b, 15c, 15d reduce the heat flow by radiation and therefore contribute to improved thermal insulation of the metal-plastic composite profile 1 according to the embodiments of Figures 7, 8 and 9 with respect to the otherwise identical

Embodiments of Figures 4, 5 and 6 at. Generally, the energy exchange with the outside profile

is more effectively hindered when the LE layer faces the outer profile. The optimum solution, however, is to provide both the surface directed towards the outer profile and the surface directed towards the inner profile with an LE layer.

In the embodiment of FIG. 10 with H-shaped

Insulating profile 4 is also provided on the transverse web 9a an LE layer 15, which faces the inner profile 2. In Fig. 10 also schematically an outer profile 3 and an inner profile 2 are shown, each having a

dovetailed recording 6 have. Notwithstanding the embodiments shown in the other figures, the non-slip compound 7 between the insulating profile 4 and the outer profile 3 in all shown

Embodiments of the invention are laid as an additional variant in the insulation profile 4. For this purpose, the insulating profile 4 consists of a first Dämmstegelement 4a and a second

Insulating web element 4b. Both the first Dämmstegelement 4a as well as the second Dämmstegelement 4b are connected via a shear-resistant connection 5 with the inner profile 2 and outer profile 3. Between the two Dämmstegelementen 4a and 4b is the shear-soft and in the transverse direction

positive connection 7, which allows a relative sliding in a direction perpendicular to plane of Fig. 10. It is important, however, that the shear-soft connection 7 is located near the outer profile 3, so that the

Schubweiche compound 7 is also in this embodiment in close proximity to the outer profile 3. The length LI of the inner profile 2 shear-resistant connected

Dämmstegelements 4a can therefore advantageously

be at least twice as large in the heat flow direction as the length L2 of connected to the outer profile 3

Damping elements 4b.

All embodiments have in common that can be limited by the creation of a metal-plastic composite profile according to the invention, the bi-metal effect and at the same time can achieve sufficient thermal insulation and sufficient bending stiffnesses. The thermal insulation achieves heat transfer coefficients Uf of <3.0 W / {m ^ -K) and heat transfer coefficients of Uf <1.5 W / (m2R). Depending on the geometry of the insulating profile and its choice of material, a bending stiffness can be achieved, compared to a composite profile of a

conventional thermoplastic material and achieved with sliding connection between the insulation profile and the outer profile a significantly higher flexural rigidity.

Claims

claims

Metal-plastic composite profile with reduced

Deformation with temperature differences between inside and outside, comprising: an inner profile (2) of metal; an outer profile (3) made of metal; and an insulating profile (4) made of plastic; With

- a shear-resistant and in Querzugrichtung

positive connection (6) between the

Insulating profile (4) and the inner profile

(2) and between the insulating profile (4) and the outer profile (3) a positive connection in Querzugrichtung and a sliding connection (7) in the thrust direction; wherein: the insulating profile (4) has a geometry that

at least one transverse element (9a, 9b, 9c; 14) extending perpendicular to the transverse pulling direction; and the material of the insulating profile (4) an E-modulus of

at least 10 GPa, preferably at least 20 GPa and more preferably at least 40 GPa, in order to increase the flexural rigidity of the metal-plastic composite profile (1).

Metal-plastic composite profile according to claim 1, characterized in that

the insulating profile (4) made of GRP or CFRP, but preferably made of GRP.

3. metal-plastic composite profile according to one of

previous claims,

characterized in that

the insulating profile (4) has a first Dämmstegelement (4a) and a second Dämmstegelement (4b) and the sliding connection (7) between the insulating profile (4) and outer profile (3) a sliding device close to the

External profile (3) between the first Dämmstegelement (4a) and the second Dämmstegelement (4b).

4. metal-plastic composite profile according to one of

previous claims,

characterized in that

the insulating profile (4) has at least one cavity and in each case a plurality of connection points to the inner profile and the outer profile.

5. metal-plastic composite profile according to one of

previous claims,

characterized in that

the insulating profile (4) as a hollow profile with one or

a plurality of transverse webs (9; 9a, 9b, 9c) is formed and the transverse web (9) or the transverse webs (9a, 9b, 9c) are arranged so that their averaged position is closer to the outer profile (3) than to the inner profile (2) ,

6. metal-plastic composite profile according to one of claims 1 to 4, further comprising a plurality of transverse bulkheads (14) on the longitudinal webs (11) of the insulating profile (4).

7. Metal-plastic composite profile according to one of claims 5 and 6, further comprising a layer with low emissivity (15) on at least one transverse web (9; 9a, 9b, 9c) or at least one transverse bulkhead (14).