DE102007062898A1 - Interior trim component for motor vehicles, in particular instrument panel, door or side paneling - Google Patents

Abstract

The present invention relates to an air-conditioned interior trim component for a motor vehicle, which has a multilayer structure, wherein an intermediate layer 2 through which a cooling medium can flow is arranged between a decorative layer 1 and a carrier 3.

Description

The The present invention relates to an at least three-layered structure Interior trim component for motor vehicles, such. B. an instrument panel, a door trim or a side trim, with the features of the preamble of claim 1.

Interior trim components for motor vehicles are usually constructed multi-layered and consist of at least a carrier and a visible side trained decor layer. In most cases it is between the carrier and the decorative layer another layer arranged around the component the necessary strength and above all, however also to give the required or desired feel. As an intermediate layer is often between carriers and decor a foam layer arranged.

The entire interior trim component is now commonplace essentially made of plastic, with different ones Plastic materials are used. So be for the Decorative layer commonly used decorative films or skins, which consist of a thermoplastic elastomer and thereby relative soft and flexible. Such shaped skins can obtained by slushing or by deep drawing become. In contrast to the decorative layer, the carrier is in usually relatively hard and rigid and usually also made a thermoplastic, wherein the carrier is often over Injection molding is produced. additional Strength can be obtained by the carrier, that fibers be processed during injection molding, being suitable Fibers frequently glass fibers are used.

The Molding or component is usually completed, putting the decorative skin and the carrier together in a mold be inserted and the space between the carrier and Decor layer is foamed. The foam has on the one hand the function of connecting the carrier to the decorative layer, and secondly, by a suitable selection of the foam in particular the haptics of the molding are varied and adjusted.

Also in the optical design of the molding offer themselves to the manufacturer a number of ways, the visible side of the molding to vary. So once the type of decorative film itself varies which is thought of different materials. About that In addition, the surface of the decorative layer can be structured be provided with a grain, for example, the plastic molding or the decorative surface, for example to give a leather-like appearance. More options consist of parts or the entire decorative side of the molding to coat with leather, imitation leather or other textiles. Next all these variations based on different materials In addition, the color of the decorative film may vary are elected, with often dark or against Pollution insensitive colors or shades selected become. A disadvantage in particular of these dark shades is that such colored components in at strongly heat up direct sunlight. This is special Of course noticeable in instrument panels that almost unprotected from the sun in the area of the windscreen are arranged. Sun are over by the solar radiation the windscreen not only when parking over a longer Period produced on the components high temperatures, but also during the heat heats up in particular a dark colored Instrument panel on strong.

Though are often climate channels in the field of instrument panels arranged over which the vehicle interior with the air conditioner is connected and air conditioned, however, these have air conditioning ducts only the function, the tempered air in the vehicle interior to transport. At a targeted temperature of the interior trim component is not intended.

So will in the DE 601 23 455 T2 describes an air conditioning duct assembly for a dashboard of a vehicle, wherein the instrument panel consists of a surface-side mold panel member which is vibration welded to a rear molding member at a plurality of locations, so that between the two mold members, a heat insulation gap remains, which acts as an air conditioning line.

there corresponds to the surface-side form panel member of the usual Instrument panel with a base layer of polypropylene (PP) as Carrier and a surface layer of one thermoplastic olefin, wherein between the base layer and the Surface layer, a cushion layer of polypropylene foam is arranged. The carrier is then with another Formtafelglied vibration welded, between which additional mold panel member and the carrier Gap remains free, as an air duct for the Air conditioning is used. A direct cooling of the instrument panel is not achieved with this arrangement.

It Thus, there is still the problem that interior trim parts of motor vehicles relatively large amounts of heat absorb only indirectly through the air conditioning is discharged with the normal exchange of air in the vehicle interior.

In particular, the arrangement of the windshield of a motor vehicle is often chosen so that a large part of the interior lining is exposed to direct sunlight and thus absorbs energy. This is particularly true for dark or black colored instrument panels that absorb energy easily and then heat up the vehicle interior as a kind of heat source. In an air conditioning of the vehicle interior through the cooling of the air conditioning system only the mixed air of the entire interior is replaced and it is very much energy consumed by the fact that the sun's radiation to the instrument panel always new radiant heat is generated, which must be dissipated ,

apart from the additional energy consumption of the air conditioning system, which is associated with increased fuel consumption, the instrument panel as a radiation source has the further disadvantage that they serve as a source of heat for the driver or the passenger is directly adjacent and especially sensitive people causes physical stress, which then causes headaches or general malaise. For longer Driving time can lead to lack of concentration, which not least affects traffic safety becomes.

So can be used in the field of instrument panel in midsummer Sunlight easily reaches temperatures up to 120 ° C. Because the way air conditioning works today is based on air sucked out of the interior or fresh air from the outside to obtain, then temper this air and then over Blowing outlets into the interior, there is a significant disadvantage this system in that draft that arises undesirable is and also a physical strain in the Car interior people leads, in particular the mucous membranes attacked in the area of the nose and eyes become.

Solved These problems are caused by a generic Interior trim component for motor vehicles with the features of claim 1. Advantageous embodiments of the invention Interior trim components for motor vehicles are in the Subclaims reproduced.

The The basic idea of the present invention is the instrument panel or in general interior trim components as a source for Turn off radiant heat, so that the load on the vehicle occupants is eliminated by the unwanted heat source and much less tempered air blown into the vehicle interior must be, which not only reduces the burden of drafts but also additional energy for the operation of the air conditioning is saved.

Interior trim components are usually multi-layered, the layers usually a decorative layer, which is arranged towards the visible side is, and a backing layer, mostly with the decorative layer over an intermediate layer is connected. The present invention now provides that the intermediate layer comprises devices which suitable for flowing through with a tempering medium so that the interior trim component is directly air conditioned and This can prevent the component from heating up. The direct Energy removal from the potential radiation source has the advantage that the vehicle interior heats up less and thus the energy consumption for the air conditioner is reduced. Ideally, this will even increase the size of the air conditioning system itself can be significantly reduced. In addition, has the reduced use of air conditioning has the advantage of being less tempered air must be blown into the vehicle interior, which In addition to saving energy costs a noticeable physical and health relief of the vehicle occupants brings with it.

Of the Construction of the air-conditioned interior trim component is essentially based on the conventional construction of these parts. So the carrier is usually from a thermoplastic material from the group polypropylene (PP), polyethylene (PE), polybutylene terephthalate (PBT), polyamide (PA), Polystyrene (PS), polycarbonate (PC), polymethyl methacrylate (PMMA), Acrylonitrile butadiene styrene (ABS), acrylonitrile butadiene styrene / polycarbonate copolymer (ABS-PC) or polyoxymethylene (POM). This is the carrier usually produced via an injection molding process. The mechanical properties of the carrier can be further improved by that in injection molding Fibers are added, with glass fibers, carbon fibers or natural fibers come into question.

The Decorative layer is often a plastic molded skin or a Plastic film, wherein thermoplastic elastomers from the group Polyurethane (PU), Polypropylene (PP), Polyethylene (PE), Polyamide (PA) or polyvinyl chloride (PVC) can be used. To gain the Decorative films can use different procedures often with the decorative films over thermoforming or slush method.

decorative film and wearers will now have an intermediate layer connected to each other, the means for flowing through comprising a tempering medium, wherein these with a tempering medium flow-through intermediate layer designed differently can be.

Thus, one possibility is to provide a foam layer as an intermediate layer which cooling hoses are foamed. In this case, for example, a foam based on polyurethane (PU), polypropylene (PP) or polyethylene (PE) can be used for the intermediate layer, in the then less flexible plastic tubing made of polypropylene (PP), polyethylene (PE), polybutylene terephthalate (PBT), Polyamide (PA), polystyrene (PS), polycarbonate (PC), polymethyl methacrylate (PMMA), acrylonitrile-butadiene-styrene (ABS), acrylonitrile-butadiene-styrene / polycarbonate copolymer (ABS-PC) or polyoxymethylene embedded. The consistency of the foam itself can be adjusted in many areas of the desired feel.

at a preferred embodiment of the present invention the cooling hoses are connected directly to the air conditioning and are via the air conditioning with the temperature control medium fed. This has the added benefit of not being a one-sided Cooling or heating of the interior lining component takes place, but an air conditioning, d. H. an adaptation to each prevailing climatic conditions takes place. Even if the cooling is the component in the foreground, so is in this arrangement a positive side effect that the component at low temperatures over the air conditioning is heated directly. This effect is playing especially at Seitentei len or door panels one not to be underestimated role, because by such directly heated Interior panel components the comfort for the vehicle occupants considerably increased at low outside temperatures becomes.

The Storage and arrangement of cooling hoses in Component can be done in different ways. So can the cooling hoses, for example, in a separate Operation prefabricated as plastic pipes and then attached to the carrier Then, together with the carrier and the molded skin to be further processed in the foaming tool.

A Another possibility is that the cooling hoses be sprayed directly in the production of the carrier.

It There is also the possibility that separately manufactured cooling hoses be preformed and aligned according to the component and then directly together with the decorative foil and the carrier in the foaming tool are inserted and during foaming of the component are foamed into the intermediate layer.

Generally In addition, there is the possibility through different concentration and variable diameter of the cooling hoses in the intermediate layer will form local temperature zones, which are heated particularly intensively. This variation can be, for example be used advantageously for areas that are particularly are exposed to strong sunlight.

When Temperierungsmedium can generally gases or liquids be used, in particular water or air in question come.

water has the advantage as cooling medium against air that with water a more efficient energy intake possible is. The disadvantage of water as a cooling medium, however in that an appropriate adaptation of the air conditioning system is required, since usually air conditioners air as a carrier medium use. Another disadvantage of water as a carrier medium is that through the use of water additional Weight is brought into the vehicle interior.

Of the detailed construction of the above-described embodiment an interior trim component according to the invention consists of a decorative layer with a layer thickness between approx. 0.5 mm and 2 mm, preferably about 1.2 mm, a carrier with a thickness of about 1.5 mm to 4 mm, preferably 2.5 mm, and an intermediate layer with a layer thickness of about 5 mm to 20 mm, preferably about 10 mm. The cooling hoses have a diameter of about 3 to about 8 mm and have a Wall thickness of approx. 0.5 to 1.5 mm.

at a further general embodiment of a with a Tempering medium flowed through intermediate layer exists These are made of an air-permeable fleece, knitted or woven fabric or an air-permeable foam. Such a Structure is obtained by the fact that the fleece, knitted or Fabric or the foam as a kind of spacer on the carrier is laminated and then turn the carrier and the "spacer" with a decorative foil is laminated. In the carrier itself are openings provided, via which with the temperature control medium flow-through layer connected to air channels is, in turn, connect to the air conditioning of the motor vehicle.

In the case of this second general embodiment of the present invention, in which the entire intermediate layer is to be flowed through by the carrier medium, air is advantageously used as temperature control medium. The air permeable nonwoven, woven or knitted fabric may be composed of mineral, animal, vegetable or chemical fibers or threads. In an advantageous embodiment of the invention, chemical fibers or filaments based on polyamide (PA), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyvinyl chloride (PVC), polypropylene (PP) or polyethylene (PE) are used, the chemical fibers opposite the animal or plant fibers or threads have the advantage that they are more resistant to the attachment of bacteria. A further advantageous embodiment of the present invention provides that the intermediate layer is constructed of air-permeable foam, which consists for example of a plastic from the group polyethylene (PE), polypropylene (PP), polyurethane (PU) or polyamide (PA).

As already mentioned before is the air-permeable Intermediate layer via air ducts with the air conditioning connected to the motor vehicle. The air ducts are over Entrance or exit openings in the carrier with the intermediate layer in a fluid connection. The air channels are either injected directly to the wearer or with the Carrier welded later. from that it turns out that it makes sense if the air ducts also made of a thermoplastic material from the group Polypropylene (PP), polyethylene (PE), polybutylene terephthalate (PBT), Polyamide (PA), polystyrene (PS), polycarbonate (PC), polymethyl methacrylate (PMMA), acrylonitrile-butadiene-styrene (ABS), acrylonitrile-butadiene-styrene / polycarbonate copolymer (ABS-PC) or polyoxymethylene (POM) exist.

Structurally is the above-described second embodiment of the interior trim component in detail from a decorative layer with a layer thickness between about 0.5 mm and 2 mm, preferably 1.2 mm, and a support in a thickness between about 1.5 mm and 4 mm, preferably 2.5 mm, constructed, with between decorative layer and support an intermediate layer with a layer thickness between about 1 mm and 10 mm, preferably 3 mm, is arranged. The air channels have a diameter of about 3 mm to 10 mm with a wall thickness about 1 mm to about 4 mm.

at a preferred embodiment of this second variant In the present invention, the air channels are on the outside the carrier, wherein the interior trim component has at least one air supply duct and an exhaust duct, which are arranged so that when tempering the entire component is traversed by air.

ever According to an embodiment of the present invention, it may be necessary be that taken in this second variant measures must be that prevent the decorative film when blowing in the air from the air conditioning inflates. This can be achieved, for example, by the fact that on the side the exhaust duct a slight negative pressure is generated, so that a Damming the carrier medium is prevented. In addition, you can also provided framework-like reinforcements in the intermediate layer be, with the help of which the decorative film can be fixed. In this However, case care must be taken that the feel of the interior trim component is not suffers from such reinforcements.

Also in the second general embodiment of the present invention In the invention, temperature zones can be created in which by a heaped arrangement of supply and exhaust air ducts the carrier medium preferably transported to selected locations where is then an increased temperature exchange and a faster and more intensive air conditioning of the component takes place.

Of the Cross-section and the geometric arrangement of the air ducts, Cooling hoses, supply and exhaust air ducts as well the flow-through layers is chosen so that possibly possible flow noise be minimized or do not occur at all. This includes Also, that has edges and bottlenecks that cause noise could be avoided. Overall, the acoustics in the vehicle interior when using the invention Interior trim components improved as the disturbing Noise of the ventilation due to the reduced use the air conditioning also be minimized.

in the The present invention will be described in detail below with reference to figures explained. Show

1 a cross-section through a section of an interior trim component with a foamed intermediate layer and foamed cooling hoses and

2 a cross-section through a section of an interior trim component with an air-permeable fleece, knitted fabric or fabric as a "spacer".

In the 1 is the typical for an interior trim component layered structure to recognize, wherein between a decorative layer 1 and a carrier 3 a foamed intermediate layer 2 is arranged in the cooling hoses 4 are formed. The cooling hoses 4 are similar to a floor heating regularly distributed in the layer, so that a uniform temperature of the interior trim component is possible. In the 1 shown embodiment of the present invention are the cooling hoses 4 on the carrier 3 fixed. In this not drawn to scale schematic representation of the component according to the invention has the decorative layer 1 a layer thickness of about 1.2 mm and the foamed intermediate layer 2 a layer thickness of about 10 mm, while the cooling hoses have a diameter of about 5 mm and the layer thickness of the carrier is about 2.5 mm. The wall thickness 5 the cooling hoses 4 has about 1 mm.

The 2 shows a further embodiment of the present invention, wherein the intermediate layer 2 is formed by an air-permeable nonwoven, woven or knitted fabric or an air-permeable foam which acts as a "spacer" between the decorative layer 1 and the carrier 3 are arranged. The layer is permeable to air and is supplied by a stream of air 7 flows through, which via an air supply channel 8th and corresponding openings 10 in the carrier 3 fed to the intermediate layer and through openings 10 and an exhaust duct 9 is removed from the layer again. The ventilation ducts 6 are preferably made of the same thermoplastic as the carrier 3 and be either with the carrier 3 subsequently welded or sprayed directly with this already during production. In this schematic representation of the present invention, which is likewise not drawn to scale, the layer thickness of the decorative layer is 1 about 1.2 mm, the carrier 3 has a layer thickness of about 2.5 mm and the spacer fabric or knitted fabric or the intermediate layer 2 has a layer thickness of approx. 3.5 mm. The air channels 6 have a diameter between 3 to about 10 mm and a wall thickness between 1.0 and 4 mm.

1

decorative layer

2

interlayer

3

carrier

4

coolant hose

5

Cooling tube wall

6

Wall air duct

7

airflow

8th

Air supply duct

9

exhaust duct

10

opening

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 60123455 T2 [0007]

Claims (26)

At least three-layer interior trim component for motor vehicles, in particular dashboard, door or side paneling, with a decorative layer forming the visible side ( 1 ), a carrier ( 3 ) and at least one between decorative layer ( 1 ) and supports ( 3 ) arranged intermediate layer ( 2 ), characterized in that the intermediate layer ( 2 ) Comprises means for flowing through a tempering medium. Component according to claim 1, characterized in that the carrier ( 3 ) of a thermoplastic material from the group polypropylene (PP), polyethylene (PE), polybutylene terephthalate (PBT), polyamide (PA), polystyrene (PS), polycarbonate (PC), polymethylmethacrylate (PMMA), acrylonitrile-butadiene-styrene (ABS ), Acrylonitrile-butadiene-styrene / polycarbonate copolymer (ABS-PC) or polyoxymethylene (POM). Component according to claim 1 or 2, characterized in that the carrier ( 3 ) is reinforced with fibers selected from the group of glass fibers, carbon fibers or natural fibers. Component according to one of claims 1 to 3, characterized in that the decorative layer ( 1 ) is a molded skin made of a thermoplastic elastomer from the group polyurethane (PU), polypropylene (PP), polyethylene (PE), polyamide (PA) or polyvinyl chloride (PVC). Component according to one of claims 1 to 4, characterized in that the intermediate layer ( 2 ) a foam layer with foamed-in cooling hoses ( 4 ). Component according to one of claims 1 to 5, characterized in that the foam layer is made of a plastic from the group polyurethane (PU), polypropylene (PP) or polyethylene (PE). Component according to one of claims 1 to 6, characterized in that the cooling hoses ( 4 ) Flexible plastic hoses made of polypropylene (PP), polyethylene (PE), polybutylene terephthalate (PBT), polyamide (PA), polystyrene (PS), polycarbonate (PC), polymethylmethacrylate (PMMA), acrylonitrile-butadiene-styrene (ABS), acrylonitrile Butadiene-styrene / polycarbonate copolymer (ABS-PC) or polyoxymethylene (POM) are. Component according to one of claims 1 to 7, characterized in that locally different concentrations and variable diameter of the cooling hoses ( 4 ) are provided for the formation of local temperature zones. Component according to one of claims 1 to 8, characterized in that the cooling hoses ( 4 ) are connected to the air conditioning of the motor vehicle. Component according to one of claims 1 to 9, characterized in that as Temperierungsmedium water or Air is provided. Component according to one of claims 1 to 10, characterized in that the decorative layer ( 1 ) a layer thickness between 0.5 mm and 2 mm, preferably about 1.2 mm, the intermediate layer ( 2 ) a layer thickness between 5 mm and 20 mm, preferably about 10 mm, and the support ( 3 ) has a layer thickness between 1.5 mm and 4 mm, preferably 2.5 mm. Component according to one of claims 1 to 11, characterized in that the cooling hoses ( 4 ) has a diameter of about 3 mm to about 8 mm and a wall thickness ( 5 ) of about 0.5 to about 1.5 mm. Component according to one of claims 1 to 4, characterized in that the intermediate layer ( 2 ) is an air-permeable nonwoven fabric, knitted or woven fabric or an air-permeable foam. Component according to claim 13, characterized that the air-permeable fleece, woven or knitted fabric out mineral, animal, vegetable or chemical fibers or Threads is constructed. Component according to Claim 14, characterized that the air-permeable fleece, woven or knitted fabric out chemical fibers or threads based on polyamide (PA), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), Polyvinyl chloride (PVC), polypropylene (PP) or polyethylene (PE) is constructed. Component according to claim 13, characterized that the air-permeable foam made of a plastic from the group polyethylene (PE), polypropylene (PP), polyurethane (PU) or polyamide (PA). Component according to one of claims 13 to 16, characterized in that the intermediate layer ( 2 ) via air channels ( 6 ) is connected to the air conditioning of the motor vehicle. Component according to one of claims 13 to 17, characterized in that the air channels ( 6 ) the carrier ( 3 ) injected directly with the carrier ( 3 ) are welded and via openings ( 10 ) in the carrier ( 3 ) with the intermediate layer ( 2 ) are in fluid communication. Component according to one of claims 13 to 18, characterized in that the air ducts ( 6 ) of a thermoplastic material from the group polypropylene (PP), polyethylene (PE), polybutylene terephthalate (PBT), polyamide (PA), polystyrene (PS), polycarbonate (PC), polymethylmethacrylate (PMMA), acrylonitrile-butadiene-styrene (ABS ), Acrylonitrile-butadiene-styrene / polycarbonate copolymer (ABS-PC) or polyoxymethylene (POM). Component according to one of claims 13 to 19, characterized in that provided as tempering medium air is. Component according to one of claims 13 to 20, characterized in that the decorative layer ( 1 ) a layer thickness between 0.5 mm and 2 mm, preferably about 1.2 mm, the intermediate layer ( 2 ) a layer thickness between 1 mm and 10 mm, preferably about 3 mm, and the support ( 3 ) has a layer thickness between 1.5 mm and 4 mm, preferably 2.5 mm. Component according to one of claims 13 to 21, characterized in that the air ducts ( 6 ) have a diameter of about 3 to about 10 mm and a wall thickness of about 1.0 to about 4 mm. Component according to one of claims 13 to 22, characterized in that the component at least one air supply channel ( 8th ) and at least one exhaust duct ( 9 ) having. Component according to claim 23, characterized in that in the region of the at least one exhaust air duct ( 9 ) A negative pressure is provided. Component according to one of claims 13 to 24, characterized in that additional components in the component and exhaust ducts for the formation of local temperature zones are provided. Use of a component according to one of the claims 1 to 25 as interior trim for a motor vehicle, in particular as an instrument panel, door or side paneling.