DE102015200272A1 - INTERIOR ELEMENT FOR A MOTOR VEHICLE AND METHOD FOR MANUFACTURING AN INTERIOR ELEMENT - Google Patents

Abstract

The invention relates to an interior element (1) for a motor vehicle, wherein the interior element (1) has a shaping support structure (4) and a decor cover (3) covering the support structure (4) at least partially with an A side and a B side. According to the invention, a heating device (5) arranged between the carrier structure (4) and the decorative cover (3) is provided with at least one applied heating conductor track (7.1, 7.2).

Description

The present invention relates to an interior element for a motor vehicle according to the preamble of independent claim 1.

Accordingly, the invention relates, in particular, to an interior element for a motor vehicle, wherein the interior element has a shaping support structure and a decor cover which covers the support structure at least in sections and has an A side and a B side. The decorative cover may in particular be an artificial leather lamination, real leather lamination, a nonwoven fabric or a lamination with at least one film, in particular IMD film.

In the automotive industry, there is an increasing trend to make the vehicle interior even more comfort environment. Since temperature sensation is one of the key indicators of vehicle occupant comfort, thermal function plays an important role in this regard.

While electric seat heating systems for producing a comfortable microclimate between the seat surface and the driver or his passengers already belong to the standard equipment of most automobile manufacturers, the targeted heating of contact surfaces is usually often understood as a luxury feature. However, the additional comfort of well-being provided by the targeted heating of contact surfaces provides a high level of acceptance among drivers and passengers alike.

Accordingly, the present invention is particularly directed to a technology which is particularly suitable for directly heating contact surfaces of an interior element such as a steering wheel, a shift lever, door handles, armrests, etc.

The existing heating concepts, which were originally developed for seat heaters, are not readily usable for targeted heating of such contact surfaces, since in the known and originally developed for seat heaters technologies usually wire heaters are used, in which the Joule heating of an electrically heated wire to Heating the seat is exploited.

The disadvantage of such wire heaters is to be seen in particular in the fact that the heating wires are usually operated at a relatively high temperature, consequently a correspondingly thick padding for decor reference is imperative to homogenize the temperature field for the decorative surface, and to ensure that a predetermined, physiologically harmless maximum temperature on the A side of the decorative cover is not exceeded.

Therefore, it is common in seat heaters to arrange between the heating wires and the decor cover the seat foam and thus provide the required upholstery. In addition to the homogenization of the temperature field, this concept provides the further advantage that the heating wires are invisible and haptically invisible from the decor side.

However, for heating of contact surfaces, in particular for heating the steering wheel, the shift lever, the door handles and / or the armrests of a vehicle, these heating concepts originally developed for seat heaters can not be readily applied, since in these interior elements as a rule, if any, Only a slight padding can be applied.

Apart from this, the concepts developed for seat heaters can only be used to a limited extent in electric vehicles, since energy efficiency, in particular of interior heating, also plays an essential role in such vehicles. Using conventional wire heating concepts originally developed for seat heaters would significantly shorten the range of an electric vehicle.

Based on this problem, the present invention is therefore based on the object of specifying a heatable interior element, in which an intentionally fixed or definable contact surface of the interior element can be heated in an energy-efficient manner. In particular, the heating function should be integrated with the least possible design effort in the interior element.

Furthermore, a corresponding method for producing such an interior element with heatable contact surfaces is to be specified.

With regard to the interior element, the object underlying the invention is achieved by the subject matter of independent claim 1, wherein advantageous developments of the interior element according to the invention in the dependent claims 2 to 15 are given.

With regard to the manufacturing process, the object underlying the invention is in particular by the subject matter of the independent claim 16 or alternatively by the subject of the sibling Claim 21, wherein advantageous developments of the method according to the invention in the dependent claims 17 to 20 or 22 or 23 are given.

According to the invention, the interior element has a shaping support structure and a decorative cover covering the support structure with an A side and a B side, wherein the heating function is realized by a heating arranged between the support structure and the decorative cover with at least one applied heating conductor track ,

The decorative cover is in particular a single-layer or multi-layer drapeable decorative cover which has an A-side and a B-side. The A side of the decorative cover corresponds to the visible side surface of the decorative cover in a state when the indoor element is installed in the motor vehicle. By contrast, the B side of the decorative cover corresponds to the surface of the decorative cover, which is opposite to the A side and represents the non-visible region of the interior element in the installed state.

Due to the fact that at least one applied heating conductor track is used in the solution according to the invention for realizing the heating function, a particularly low overall depth of the heating is achieved so that it can not be detected haptically, in particular without padding. Since the heater is disposed between the support structure and the decorative cover, this is also not visually visible.

The at least one heating conductor consists for example of a print or the like applied layout of silver or copper-based ink. To form the heating conductor in this context, for example, a polymer Dickschichtbedruckung in question, the ink is a composite with silver flakes in the micrometer size range, a binder, a solvent, and other additives.

Alternatively, inks with silver nanoparticles in question. These inks have the advantage that they require no further binder and sinter in the drying step, so as to realize specific conductivities.

Of course, other inks are also suitable, for example inks with copper or copper oxide nanoparticles, which are chemically reduced in the drying process and also sinter.

According to some embodiments of the present invention, the at least one heating trace is formed as a thick film pressure whose electrical resistance increases as a function of temperature. For this purpose, it is preferable to use for the realization of the heating function inks or prints on the basis of PTC materials, ie materials with a positive temperature coefficient, so that the heating power is automatically throttled with increasing temperature. It is conceivable in this context, for example, to form the at least one heating conductor as polymer thick-film printing, which preferably contains graphene, carbon nanotubes, carbon particles, graphite or mixtures thereof as electrically conductive components.

For applying the at least one heating conductor track, different methods can be used, for example printing processes. With regard to the latter, screen printing processes such as in the flatbed or rotary process would be preferred.

Of course, however, other processes are suitable in particular printing processes, such as high pressure, gravure or inkjet printing.

Further, it is conceivable to manufacture the heater with the at least one heating conductor track according to the FPC technology, which is already used for the production of printed electronic circuits on flexible base material. The base material for the heating here would be polyimide or a polyester film coated with a thin layer of copper. This thin copper layer alone could already be suitable as a heating conductor in the context of the present invention. Alternatively, it is also conceivable if the at least one heating conductor printed with a special color on the flexible base material and the non-printed area is etched, so that the heating conductor for the heating is maintained.

In order to be able to supply the at least one heating conductor track with electrical energy, it is advantageous for the heater integrated in the interior element to have at least one supply line which is highly electrically conductive in relation to the at least one heating conductor track, wherein the supply line and the at least one contact area are at least a heating conductor can be arranged overlapping each other.

As well as the at least one heating conductor, the at least one electrically highly conductive lead in particular consist of silver or copper-based ink. This has the advantage that the supply line and the at least one heating conductor can be formed in a common process, in particular printing process.

With regard to the decorative cover of the interior element according to the invention is provided according to an implementation of the solution according to the invention that this has a thermoplastic film, in particular IMD film. Of course, other materials come into question, especially real leather, artificial leather or fleece or fabric materials.

As a "thermoplastic" is generally referred to a film having a reversible softening point or range above the service temperature, above which it can be mechanically deformed, the new shape is maintained after cooling of the fabric below the softening point or range.

The thermoplastic film preferably used as a decorative cover in the interior element according to the invention contains, for example, polyolefin, polypropylene (PP) and / or a polypropylene copolymer. Conceivable in this context, it is also to provide as a decorative cover a thermoplastic multilayer film, in particular a polypropylene copolymer multilayer film.

In preferred embodiments of the interior element according to the invention, the decorative cover embodied in particular as a thermoplastic film serves as a carrier material for the heating integrated in the interior element or the at least one heating conductor of the heater to be applied to the B side of the decor cover. Therefore, the decor cover should have in addition to general resistance requirements, especially the necessary thermal deformability.

As a film material for the decorative cover is - in addition to the materials already mentioned - thus in particular a material suitable thermoplastic polymers, in particular polyacrylates, polymetacrylates, thermoplastic polyurethanes, polyesters, polyethers, polyolefins, polyamides and copolymers of different polymers. Particularly suitable are thermoplastic polyurethanes, polymethyl methacrylate (TMMA) and modified variants of PMMA, polycarbonates, acrylstyrene, acrylonitrile copolymer (ASA) and mixtures of these polymers.

As a material for the support structure of the interior element is particularly suitable a thermoplastic material, such as preferably polypropylene, acrylic-butadiene-styrene and / or thermoplastic polyurethane elastomers and / or natural fiber composites and / or natural fiber materials. The support structure serves in particular to give the finished interior element the necessary dimensional stability. In this case, the support structure can be mounted in different ways on the B side of the decorative cover or on the arranged between the decorative cover and the support structure heater.

In preferred embodiments of the interior element according to the invention, with regard to the heating integrated in the interior element, it is provided that it has a carrier substrate in the form of a film, in particular in the form of a thermoplastic film, on which the at least one heating conductor is applied. Although it is conceivable in principle that the thermoplastic film serving as the decorative cover of the interior element also assumes the function of the carrier substrate for the heating, it is preferable to provide a carrier substrate for the heater, which is formed separately from the decor cover, in addition to the decorative cover designed in particular as a thermoplastic film.

This carrier substrate is hereinafter also referred to as "heating foil" if the carrier substrate is formed as a foil, in particular a thermoplastic foil, on which the at least one heating conductor track is applied.

As an alternative to the above-mentioned embodiment, in which the heater has a carrier substrate formed in particular separately from the decorative cover, it is basically also conceivable to apply the heating conductor directly to the A side of the carrier structure of the interior element or directly to the B side of the interior Decorative cover print.

From a production point of view, however, it has been shown that it is advantageous to print the at least one heating conductor of the heater onto a carrier substrate, which is preferably a thermoplastic film, in particular PET or PUR film with a maximum thickness of 150 μm and preferably not more than 100 μm. On this carrier substrate, the at least one heating conductor is applied and dried according to a pattern adapted to the application.

For drying or sintering of the corresponding inks, convection ovens, but also infrared dryers, UV dryers or flash lamps can be used.

Preferably, the at least one heating conductor track applied to the carrier substrate has a maximum thickness of 50 μm, preferably not more than 30 μm, and even more preferably not more than 20 μm, so that the change in thickness resulting from the integration of the heating function in the interior element is of the order of magnitude only about a maximum of 150 microns and thus in the production of the interior element of the decorative cover in the ordinary manufacturing process can be connected to the carrier substrate.

The at least one heating conductor preferably has a specific electrical resistance of between 100 Ω / m and 1500 Ω / m, and preferably between 300 Ω / m and 1000 Ω / m.

In particular, it is advantageous if, at least in regions, at least on the at least one heating conductor track applied to the carrier substrate, a protective film, in particular protective lacquer, is applied. In this way, corrosion of the heating conductor can be prevented in an easily realizable but effective manner.

According to preferred implementations of the solution according to the invention, it is provided that the carrier substrate of the heater is elastically deformable with the at least one heating conductor track applied to the carrier substrate and the protective film optionally applied to the heating conductor track such that it can be adapted to a shaping of the carrier structure of the interior element.

This makes it easier to connect the carrier substrate of the heater cohesively with the A side of the support structure and / or the B side of the decorative cover.

With regard to the feel, it is advantageous if at least one intermediate layer, in particular foam layer, is arranged between the carrier substrate of the heating and the B side of the decorative cover and / or the A side of the carrier structure.

The interior element according to the invention advantageously has at least one contact surface, wherein the at least one heating conductor of the heater is arranged in the region of the contact surface.

The interior element is in particular a part of a door panel, tunnel console or dashboard, wherein the interior element is designed in particular as an armrest of a vehicle seat, as an armrest of a door panel, as a vehicle seat, as a door handle, as a shift lever, as a steering wheel or as a cup holder.

The term "heating track" as used herein is by no means to be understood as referring only to elongate, line-shaped tracks. Rather, these are to be understood as meaning any printed conductors with a two-dimensional profile, in particular also flat printed conductors in the form of an electrically conductive layer, which is applied in a planar manner on the carrier substrate.

According to a realization of the interior element according to the invention, it is provided that the carrier substrate of the heater has a shape adapted to the carrier structure of the interior element and in particular formed by an in-mold process. As described in more detail below in connection with the production method according to the invention, it is conceivable in this context in particular that the carrier substrate of the heater is deformed in one step together with the decorative cover of the interior element by an in-mold method.

• a) Bereitstellen einer Trägerstruktur des herzustellenden Innenraumelements, welches insbesondere vorgeformt ist;
• b) Bereitstellen einer Heizfolie mit einem Trägersubstrat in Gestalt einer Folie, mindestens einer auf dem Trägersubstrat aufgebrachten Heiz-Leiterbahn und mit einem Schutzfilm, insbesondere Schutzlack, der zumindest bereichsweise zumindest auf der mindestens einen auf dem Trägersubstrat aufgebrachten Heiz-Leiterbahn ausgebildet ist, wobei die Heizfolie eine an einen Bereich der Trägerstruktur angepasste Größe und Abmessung aufweist;
• c) Anordnen der Heizfolie auf dem Bereich der Trägerstruktur, an dessen Größe und Abmessung die Heizfolie angepasst ist, und Fixieren der Heizfolie an dem Bereich der Trägerstruktur, insbesondere durch eine stoffschlüssige Verbindung; und
• d) zumindest bereichsweises Drapieren der Trägerstruktur und der auf der Trägerstruktur angeordneten Heizfolie mit einem Dekorbezug.

In the method according to the invention for producing an interior element with integrated heating function for heating contact surfaces of the interior element, the following method steps are provided:

• a) providing a support structure of the interior element to be produced, which is in particular preformed;
• b) providing a heating foil with a carrier substrate in the form of a foil, at least one heating conductor track applied on the carrier substrate and with a protective film, in particular protective lacquer, which is at least partially formed at least on the at least one heating conductor track applied on the carrier substrate, wherein the Heating film has a size and dimension adapted to a region of the support structure;
• c) arranging the heating foil on the area of the carrier structure, at the size and dimension of which the heating foil is adapted, and fixing the heating foil at the area of the carrier structure, in particular by a material-locking connection; and
• d) at least partially draping the support structure and arranged on the support structure heating foil with a decorative cover.

In this case, provision is made in particular for the heating foil to be arranged on the region of the carrier structure in such a way that, when the interior element is finished, it lies in a region which corresponds to a heatable contact surface of the interior element.

In an advantageous manner, the heating foil is provided in method step b) such that the at least one heating conductor track applied to the carrier substrate is applied in a layout which is adapted to the heatable contact surface of the finished interior element.

Alternatively or additionally, it is provided that the decorative cover is designed in particular multi-layer, and wherein a layer of decorative cover is a layer of genuine leather, synthetic leather, nonwoven fabric or a plastic film. Preferably, a layer of the decorative cover is a foam layer.

In particular, it is advantageous if, prior to method step c), the heating foil is preformed in such a way that it adjoins the region of the Carrier structure has at least partially adapted shape.

• a) Bereitstellen einer als Dekorbezug für das Innenraumelement dienenden thermoplastischen Folie, welche eine A-Seite und eine B-Seite aufweist;
• b) Laden der thermoplastischen Folie auf ein Formungswerkzeug, so dass die A-Seite der Folie zu einer Negativform des Formungswerkzeuges zeigt, wobei die Negativform des Formungswerkzeuges vorzugsweise eine in Richtung der A-Seite der Folie zeigende, zumindest bereichsweise genarbte Oberfläche aufweist;
• c) Erwärmen der thermoplastischen Folie; und
• d) Prägen der erwärmten Folie in der Negativform des Formungswerkzeuges,

According to an alternative, but nevertheless to the present invention, method for producing an interior element with integrated heating function for heating contact surfaces of the interior element, the following method steps are provided:

• a) providing a serving as decorative cover for the interior element thermoplastic sheet having an A-side and a B-side;
• b) loading the thermoplastic film onto a forming tool so that the A side of the film points to a negative mold of the forming tool, the negative mold of the forming tool preferably having a surface which is grainy in the direction of the A side of the film and at least partially grained;
• c) heating the thermoplastic film; and
• d) embossing the heated film in the negative mold of the molding tool,

Accordingly, an in-mold method is particularly suitable for producing the interior element according to the invention, in which an initially unhardened thermoplastic film, which represents the decorative cover in the finished state of the interior element, is loaded onto a forming tool so that the A side of the film to a negative mold of the molding tool shows. The negative mold of the molding tool preferably has a surface which is grainy in the direction of the A side of the film and grained at least in regions. In this way, in a subsequent process step, the originally unembossed, thermoplastic film can be laminated to a support structure and obtained in the same step their grain. Of course, the surface of the negative mold can also be an unhardened, in particular smooth surface.

Subsequently, the film loaded on the molding tool is first heated to increase the moldability and the extensibility of the film. Thereafter, the embossing of the heated film takes place in the negative mold of the forming tool, wherein not only a three-dimensional contour of the film is achieved, but possibly also a grain in the A side of the film.

The in-mold process is a laminating process in which the thermoplastic polyolefin (TPO) film frequently used in the automotive industry obtains its surface structure through a specially grained tool. The unembossed film is shaped and embossed by means of a vacuum in the tool. In the same step, the material is laminated to the carrier. This prevents distortion of the grain on sharp edges, which can occur in processes with pre-embossed films and skins. In order to be able to produce a soft feel, in many cases of connection, in particular a TPO foam sheet is preferred.

According to the invention, in the method for producing the interior element equipped with the heating function, the further method step of applying a thermoplastic heating foil with at least one printed heating conductor on at least a portion of the B side of the thermoplastic foil used in the finished interior element as a decorative cover.

According to a further aspect of the method according to the invention, a carrier material is applied to at least a portion of the B side of the finished interior element as decorative cover, such that at least in regions the thermoplastic heating foil is arranged between the B side of the film serving as decorative cover and the carrier material , The application of the carrier material serves to form the shaping carrier structure of the interior element, which gives the finished interior element the necessary dimensional stability.

Preferably, the carrier material comprises a thermoplastic, in particular polypropylene, acrylic-butadiene-styrene and / or polyurethane elastomers and / or natural fiber composites, but other carrier materials, in particular natural-fiber materials, may also be used.

In particular, it is conceivable that the thermoplastic heating foil is preformed and pressed during or after the embossing of the serving as decorative cover sheet against the B side of serving as a decorative cover sheet.

For example, in method step b), the thermoplastic heating foil can be loaded onto the forming tool together with the foil serving as decorative cover, in such a way that the foil serving as a decorative cover is arranged between the negative mold of the forming tool and the thermoplastic heating foil. Then, in a common step, the thermoplastic film used as decorative cover and the thermoplastic heating foil can be deformed after the corresponding heating of the foils in the negative mold of the forming tool, while at the same time at least serving as decorative cover for the interior element thermoplastic film also optionally receives a corresponding embossing.

Alternatively or additionally, it is conceivable that preferably before embossing serving as decorative cover thermoplastic film in Process step d) an adhesive layer, in particular a heat-activatable adhesive layer, and / or an adhesion promoter is applied to the B side of the decorative cover serving as film, wherein simultaneously with the embossing of serving as decorative cover sheet, the thermoplastic heating foil on at least a portion of the B side the film serving as decorative cover is applied in particular by pressing and preferably integrally bonds with the film during the subsequent cooling of the film used as decorative cover.

The carrier material, which forms the support structure in the finished interior element, can be attached in different ways to the B side of the film serving as decorative cover. On the one hand, it is conceivable to preferably apply the carrier material after embossing the film serving as decorative cover and after joining the thermoplastic heating film to the B side of the film serving as decorative cover by injection-molding onto the B side of the film. Alternatively, it is also conceivable to apply the carrier material during the embossing of the film on the B side of the film, in particular by pressing.

In accordance with preferred embodiments of the method according to the invention, both the thermoplastic heating foil and the carrier material are applied to at least a portion of the B side of the foil serving as decorative cover, in particular by pressing, simultaneously with the embossing of the thermoplastic foil serving as decorative cover, wherein the thermoplastic heating foil and the Preferably, during the subsequent cooling of the film serving as a decorative cover, the carrier material is bonded to the film in a material-locking manner.

In this context, it is conceivable, in particular, for the carrier material to be arranged on a surface of a positive mold of the molding tool facing the B side of the thermoplastic sheet used as decorative cover and to be applied by laminating to the B side of the thermoplastic film serving as decorative cover. In this context, it is particularly conceivable that at least the carrier material is reformed with the aid of the positive mold of the forming tool prior to lamination.

The invention will be described in more detail below with reference to the attached drawings by way of exemplary embodiments.

Show it:

1 schematically a sectional view through an exemplary embodiment of the interior element according to the invention;

2a , b schematically show various embodiments of a heater for an armrest designed as interior element according to the present invention; and

3a , b shows schematically the production of an interior element according to an exemplary embodiment of the invention.

In 1 is a schematic sectional view of an exemplary embodiment of the interior element according to the invention 1 shown. Specifically, the in 1 shown embodiment of the interior element according to the invention 1 around an armrest of a vehicle seat. The armrest is in the 1 illustrated schematic embodiment with a corresponding holder 2 connected.

The following section details the structure of the in 1 designed as an armrest interior element according to the invention 1 received.

As it is in particular the detail view in 1 can be removed, the interior element 1 or the armrest a decorative cover 3 which is preferably a drapable layer composite. Typical materials for the decor cover 3 are foils, imitation leather, real leather or non-woven fabric.

The first outer single layer 3.1 of the decorative cover 3 is in the illustrated embodiment with a cushioning inner layer 3.2 made of cushioning material, in particular foam, laminated.

Although in 1 not shown, it is also conceivable in this context that the decorative cover 3 still at least one other layer, such as a PET or a PU film has.

The B side of the decor cover 3 covers at least partially the shaping support structure 4 of the interior element 1 , Between the support structure 4 and the decor cover 3 is at the in 1 illustrated embodiment of the interior element according to the invention 1 a heater 5 arranged in the form of a film heater.

As in particular of the representations in 2a and 2 B can be removed, has the heater designed as a film heater 5 a carrier substrate 6 in the form of a film, in particular in the form of a thermoplastic film on. On this carrier substrate 6 is helical at least one heating trace 7.1 . 7.2 applied.

In detail are in 2a and 2 B different embodiments of for example, in the 1 schematically illustrated armrest used for heating 5 shown. In both embodiments, at least one heating conductor comes 7.1 . 7.2 used according to a particular pattern on the carrier substrate 6 is applied. With regard to the Heizlitzen pattern, it should be noted that this is chosen so that the contact surface to be heated can be heated as homogeneously as possible without heat spots being able to occur at specific points.

A homogeneous temperature field can be achieved, in particular, if the heating strands pattern has the most uniform surface density possible.

In the 2a shown embodiment of the heater 5 is different from the one in 2 B embodiment shown in particular that in the Heizlitzen pattern according to 2a only a single meander-shaped heating conductor 7.1 is provided while in the Heizlitzen pattern according to 2 B two separate heating strands 7.1 . 7.2 be used.

By using several, separate heating strands 7.1 . 7.2 can control the heating power and heating rate of the heater 5 increase. Furthermore, the reliability is improved, since even with a failure (interruption) of a heating track, the heater can still serve to control the temperature of the contact surface.

However, has a heater 5 with several heating strands 7.1 . 7.2 a higher power consumption compared to a heater 5 with only a single heating track 7.1 ,

In particular, at the in 2a or 2 B illustrated exemplary embodiment provided that the heating 5 as a carrier substrate 6 a thermoplastic film of, for example, PET or PUR, wherein said thermoplastic film has a thickness of at most 150 microns and preferably at most 100 microns. On the carrier substrate 7 is - as it in particular the representations in 2a and 2 B can be removed - at least one heating conductor 7.1 . 7.2 applied in accordance with a predetermined pattern. The applied heating conductor 7.1 . 7.2 in this case has a maximum thickness of 15 microns and preferably at most 10 microns.

In the illustrated embodiments, there is at least one heating conductor 7.1 . 7.2 from a print made from silver- or copper-based ink.

As in 2a and 2 B shown, indicates the heater 5 in each case at least one opposite the heating conductor track 7.1 . 7.2 electrically highly conductive supply line 8.1 . 8.2 on. In a contacting area 9 are the appropriate supply line 8.1 . 8.2 and the at least one heating conductor 7.1 . 7.2 printed overlapping each other.

The following is with reference to the representations in 3a and 3b in short, a possibility for the production of the interior element according to the invention 10 described.

In detail is in 3a schematically a molding tool 10 shown in the open state while in 3b the closed molding tool 10 is shown.

The molding tool 10 has a negative shape in the upper area 11 and in the lower part a positive shape 12 on. Preferably, in the negative mold 11 vacuum channels 13 formed, through which the negative mold 11 of the molding tool 10 can be applied with vacuum. In this way, one on the molding tool 10 loaded foil to the negative mold 11 be deep-drawn, namely by the vacuum channels 13 a vacuum is applied.

According to one embodiment of the method according to the invention, in which as a decorative cover 3 for the interior element 1 a thermoplastic film 3.1 is used, this thermoplastic film 3.1 first on the forming tool 10 loaded, leaving the A side of the slide 3.1 to the negative form 11 of the molding tool 10 shows. Although not shown in the drawings, it is conceivable in this context that the negative mold 11 of the molding tool 10 one towards the A side of the film 3.1 having pointing, at least partially grained surface.

Furthermore, a thermoplastic heating foil 5.1 on the molding tool 10 loaded in such a way that as a decor reference 3 serving thermoplastic film 3.1 between the negative form 11 of the molding tool 10 and the thermoplastic heating foil 5.1 lies.

The thermoplastic heating foil 5.1 has the thermoplastic carrier substrate 6 with the applied thereon, at least one heating trace 7.1 . 7.2 on.

Subsequently, both the as a decorative cover 3 for the interior element 1 serving thermoplastic film 3.1 as well as the thermoplastic heating foil 5.1 heated. The two heated films 3.1 . 5.1 then be in the negative form 11 of the molding tool 10 deep-drawn.

At the positive form 12 of the molding tool 10 In the schematically illustrated embodiment, the material of the support structure 4 (Carrier material 4.1 ) attached or hung up. The carrier material 4.1 preferably comprises a thermoplastic, in particular polypropylene, acrylic-butadiene-styrene and / or thermoplastic polyurethane elastomers and / or natural fiber composites, and is for example by the positive mold 12 of the molding tool 10 preformed.

During or after the embossing of the decorative cover serving as a foil 3.1 together with the thermoplastic heating foil 5.1 is the preferably preformed carrier material 4.1 against the B side of the decorative cover serving as a foil 3.1 or against the B side of the thermoplastic heating foil 5.1 pressed. During the subsequent cooling of serving as decorative cover sheet 3.1 connects the carrier material 4.1 with the decorative cover serving as a foil 3.1 or the thermoplastic heating foil 5.1 in a cohesive manner.

The invention is not limited to the embodiments shown in the drawings, but results from a synopsis of all the features disclosed herein.

Claims (23)

Interior element ( 1 ) for a motor vehicle, wherein the interior element ( 1 ): - a shaping support structure ( 4 ); and - at least partially, the support structure ( 4 ) covering decorative cover ( 3 ), which has an A-side and a B-side, characterized by a between the support structure ( 4 ) and the decorative cover ( 3 ) arranged heating ( 5 ) with at least one applied heating conductor track ( 7.1 . 7.2 ). Interior element ( 1 ) according to claim 1, wherein the at least one heating conductor track ( 7.1 . 7.2 ) consists of a layout of silver- or copper-based ink, and / or consists of a layout of graphene, carbon nanotubes, carbon particles, graphite or mixtures thereof. Interior element ( 1 ) according to claim 1 or 2, wherein the heating ( 5 ) at least one opposite to the at least one heating conductor track ( 7.1 . 7.2 ) electrically highly conductive lead ( 8.1 . 8.2 ), wherein in a contacting area the supply line ( 8.1 . 8.2 ) and the at least one heating conductor track ( 7.1 . 7.2 ) are arranged overlapping each other. Interior element ( 1 ) according to one of claims 1 to 3, wherein the at least one heating conductor track ( 7.1 . 7.2 ) is designed as a thick-film printing whose electrical resistance increases as a function of the temperature. Interior element ( 1 ) according to one of claims 1 to 4, wherein the decorative cover ( 3 ) has a thermoplastic film, in particular synthetic leather film, or genuine leather, or textile or nonwoven, and wherein the support structure ( 4 ) comprises a thermoplastic, in particular polypropylene, acrylic-butadiene-styrene, thermoplastic polyurethane elastomers, and / or natural fiber composites and / or natural fiber materials. Interior element ( 1 ) according to one of claims 1 to 5, wherein the heating ( 5 ) a carrier substrate ( 6 ) in the form of a film, in particular in the form of a thermoplastic film, on which the at least one heating conductor track ( 7.1 . 7.2 ), in particular imprinted. Interior element ( 1 ) according to one of claims 1 to 5, wherein the at least one heating conductor track ( 7.1 . 7.2 ) directly on the A-side of the support structure ( 4 ) or directly on the B side of the decorative cover ( 3 ) is applied. Interior element ( 1 ) according to claim 6, wherein the carrier substrate ( 6 ) a thermoplastic film, in particular PET film or PUR film is with a thickness of at most 150 microns and preferably at most 100 microns, and wherein on the carrier substrate ( 6 ) applied heating conductor ( 7.1 . 7.2 ) has a thickness of not more than 50 μm, preferably not more than 30 μm and more preferably not more than 20 μm, in particular not more than 7.5 μm. Interior element ( 1 ) according to claim 6 or 8, wherein at least in regions, at least on the at least one on the carrier substrate ( 6 ) applied heating conductor track ( 7.1 . 7.2 ) a protective film, in particular protective lacquer, is applied. Interior element ( 1 ) according to claim 6, 8 or 9, wherein the carrier substrate ( 6 ) of the heater ( 5 ) with the at least one on the carrier substrate ( 6 ) applied heating conductor track ( 7.1 . 7.2 ) and possibly on the heating track ( 7.1 . 7.2 ) applied protective film is elastically deformable such that it is adaptable to a shape of the support structure ( 4 ) of the interior element ( 1 ). Interior element ( 1 ) according to claim 6 or any one of claims 8 to 10, wherein the carrier substrate ( 6 ) of the heater ( 5 ) cohesively with the A-side of the support structure ( 4 ) and / or the B side of the decorative cover ( 3 ) connected is. Interior element ( 1 ) according to one of claims 6 or one of claims 8 to 11, wherein between the carrier substrate ( 6 ) of the heater ( 5 ) and the B side of the decorative cover ( 3 ) and / or the A-side of the support structure ( 4 ) At least one intermediate layer, in particular foam layer is arranged. Interior element ( 1 ) according to one of claims 1 to 12, wherein the interior element ( 1 ) has at least one contact surface, and wherein the at least one heating conductor track ( 7.1 . 7.2 ) is arranged in the region of the contact surface. Interior element ( 1 ) according to one of claims 1 to 13, wherein the interior element ( 1 ) Part of a door trim, tunnel console or instrument panel, and is designed in particular as an armrest of a vehicle seat, as an armrest of a door panel, as an armrest of a tunnel console, as a vehicle seat, as a door handle, as a shift lever, as a steering wheel or as a cup holder. Interior element ( 1 ) according to one of claims 1 to 14, wherein the at least one on the carrier substrate ( 6 ) applied heating conductor ( 7.1 . 7.2 ) is formed flat in the form of an electrically conductive layer, the surface on the carrier substrate ( 6 ) is applied. Method for producing an interior element ( 1 ) for a motor vehicle, in particular an interior element ( 1 ) according to one of claims 1 to 15, the method comprising the following method steps: a) providing a carrier structure ( 4 ) of the interior element to be produced ( 1 ), which is in particular preformed; b) providing a heating foil ( 5.1 ) with a carrier substrate ( 6 ) in the form of a film, at least one on the carrier substrate ( 6 ) applied heating conductor track ( 7.1 . 7.2 ) and with a protective film, in particular protective lacquer, at least in regions, at least on the at least one on the carrier substrate ( 6 ) applied heating conductor track ( 7.1 . 7.2 ), wherein the heating foil ( 5.1 ) one to an area of the support structure ( 4 ) has adapted size and dimension; c) arranging the heating foil ( 5.1 ) on the area of the support structure ( 4 ), in whose size and dimension the heating foil ( 5.1 ) and fixing the heating foil ( 5.1 ) at the area of the support structure ( 4 ), in particular by a cohesive connection; and d) at least partially draping the support structure ( 4 ) and on the support structure ( 4 ) arranged heating foil ( 5.1 ) with a decorative cover ( 3 ), wherein the heating foil ( 5.1 ) in such a way on the area of the carrier structure ( 4 ) is arranged, that this in the finished interior element ( 1 ) lies in a region which corresponds to a heatable contact surface of the interior element ( 1 ) corresponds. The method of claim 16, wherein in step b) the heating foil ( 5.1 ) is provided such that the at least one on the carrier substrate ( 6 ) applied heating conductor ( 7.1 . 7.2 ) is applied in a layout which is adapted to the heatable contact surface of the finished interior element ( 1 ). A method according to claim 16 or 17, wherein the decorative cover ( 3 ) is formed in particular multi-layered, and wherein a layer of the decorative cover ( 3 ) is a layer of genuine leather, synthetic leather, nonwoven fabric or a plastic film. The method of claim 18, wherein a layer of the decorative cover ( 3 ) is a foam layer. Method according to one of claims 16 to 19, wherein before the process step c) the heating foil ( 5.1 ) is preformed such that this one to the region of the support structure ( 4 ) has at least partially adapted shaping. Method for producing an interior element ( 1 ) for a motor vehicle, in particular an interior element ( 1 ) according to one of claims 1 to 15, wherein the method comprises the following method steps: a) providing a decor reference ( 3 ) for the interior element ( 1 ) thermoplastic film having an A side and a B side; b) Loading the thermoplastic film onto a molding tool ( 10 ), so that the A-side of the film to a negative mold ( 11 ) of the molding tool ( 10 ), the negative form ( 11 ) of the molding tool ( 10 ) preferably has in the direction of the A-side of the film facing, at least partially grained surface; c) heating the thermoplastic film; and d) embossing the heated film in the negative mold ( 11 ) of the molding tool ( 10 ), further comprising the step of applying a thermoplastic heating foil ( 5.1 ) with at least one printed heating conductor ( 7.1 . 7.2 ) on at least a portion of the B side of the decorative cover ( 3 ) for the interior element ( 1 ) serving thermoplastic film is provided. A method according to claim 21, further comprising the step of applying a support material ( 4.1 ) on at least a portion of the B side of the decorative cover ( 3 ) is provided, in such a way that at least partially the thermoplastic heating foil ( 5.1 ) between the B side of the decorative cover ( 3 ) serving film and the carrier material ( 4.1 ) is arranged. Method according to one of claims 16 to 22, wherein the support structure ( 4 ) of a carrier material ( 4.1 ), which is a thermoplastic in particular polypropylene, acrylic-butadiene-styrene, thermoplastic polyurethane elastomers, and / or natural fiber composites, and wherein the support material ( 4.1 ) is preferably preformed.

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