Interior trim of a motor vehicle passenger cell and a method for producing same

Abstract

The invention relates to an interior trim (1, 49) of a motor vehicle passenger cell, which contains an upper and a lower moulded body (5, 6; 44, 45) made of a lightweight construction material, which bodies are connected to one another and whose sides (7, 8) facing one another together form an air guide (17) which has at least one air supply opening and at least one air outlet (19, 48) formed in the lower moulded body (5, 6; 44, 45). Furthermore, the interior trim (1, 49) has an air-permeable material layer (24) which is connected to the underside (22, 47) of the lower moulded body (6, 45) and covers the at least one air outlet (19, 48). In order to achieve most simple possible manufacture and sustainable design of the interior trim (1, 49) of the type in question, by means of which particularly effective and comfortable ventilation of the interior (21) of the passenger cell is made possible, the invention proposes that the two moulded bodies (5, 6; 44, 45) are bowl-shaped and each have a moulded depression (15, 16; 42, 43), wherein the two moulded depressions (15, 16; 42, 43) together form a single air chamber (20, 46) of the air guide (17), to which the at least one air supply opening (18) and the at least one air outlet (19, 48) are connected.

Description

[0001] Interior lining of a motor vehicle passenger compartment and a method for its production

[0002] The invention relates to an interior panel of a motor vehicle passenger compartment according to the preamble of patent claim 1 and a method for producing the interior panel according to the preamble of patent claim 14.

[0003] A generic panel in the form of a roof liner and a method for its production are known from DE 10 2018 129 059 A1. Here, the roof liner is formed from a lower base body made of particle foam and an upper cover element connected to this, as well as an air-permeable textile material layer that is firmly attached to the underside of the base body facing the interior of the passenger compartment. Air ducts are integrated into the upper side of the base body and are created when the base body is foamed. The upwardly open ducts are covered by the cover element, which forms part of the duct walls. The ducts forming an air duct are connected to an external air conditioning device via an air supply opening, by means of which temperature-controlled air is conveyed into the ducts.The base body also features various air outlets into which the ducts open, allowing air to flow through the material layer and from there into the interior of the passenger compartment. The material layer conceals the air outlets to improve the visual appearance and distributes the escaping air more evenly.

[0004] The invention is based on the object of realizing the simplest possible production and sustainable design of a generic interior paneling, by means of which a particularly effective and comfortable ventilation of the interior of the passenger compartment is enabled.

[0005] The object is achieved according to the invention by the features of patent claim 1 with regard to the interior lining and by the features of patent claim 14 with regard to the method for producing the interior lining.

[0006] In a first aspect of the invention, the interior lining of the motor vehicle passenger compartment is formed from an upper and a lower molded body made of a lightweight material. They are connected to one another and, with their mutually facing sides, together form an air duct. This air duct has at least one air supply opening and at least one air outlet formed in the lower molded body through which air can flow into the interior of the passenger compartment. The interior lining also has an air-permeable material layer that is connected to the underside of the lower molded body and covers the at least one air outlet, so that it is concealed, i.e. hidden, for an improved visual appearance for the respective passenger. By means of the shell-shaped design of the two molded bodies, each with a molded recess, they together form a single expansive air chamber of the air duct.At least one air supply opening and at least one air outlet are connected to the air chamber. Because this eliminates the need for complicated duct-like air ducts, the interior trim can be manufactured extremely easily. Since a single air chamber is formed in the molded body composite, almost any number of air outlets can be formed in the lower molded body, fed by this single chamber, resulting in very efficient and effective ventilation of the interior of the passenger compartment. This enables particularly wide-area and uniform ventilation, reaching virtually every corner of the interior and thus leading to a very high level of comfort for the passenger. Both molded bodies can be made from the same or at least similar material, which simplifies recycling and improves sustainability.

[0007] In an advantageous development of the invention, at least one of the two molded bodies consists of a particle foam, in particular of EPP (expandable polypropylene) or EPE (expandable polyethylene). Alternatively, the at least one molded body can also be an injection-molded component. This enables dimensionally stable interior trim with very low weight, which facilitates assembly. Recycling is also simplified because these materials are easy to shred or cut and, as thermoplastics, can be easily reprocessed by applying heat. Alternatively, the molded bodies can also be made of natural materials and contain plant fibers, in particular wood fibers or animal hair. In this case, the molded bodies are designed as pressed parts. The fibers can originate from waste from plant or wood processing. This further improves the sustainability of the production of the interior trim.

[0008] In an advantageous development of the invention, the molded bodies are connected by means of an adhesive layer, which eliminates the need for connecting elements and thus complies with the lightweight construction concept. In addition, the stability of the molded bodies is not weakened because no connecting holes are created. In a further advantageous development of the invention, the two molded bodies have form-locking and counter-form-locking elements on their facing sides, by means of which they are positioned on top of one another. As a result, the two molded bodies are already provisionally locked to one another and find their exact relative position during the assembly process. In a particularly advantageous embodiment, the pairs of form-locking and counter-form-locking elements are arranged according to the poka-yoke principle on the facing sides of the molded bodies, which completely eliminates any incorrect positioning of the two molded bodies relative to one another.The form-locking elements and counter-form-locking elements are bevelled or chamfered on their flanks so that they can more easily find their position relative to each other.

[0009] In a further particularly advantageous development of the invention, a large-mesh and / or large-pore spacer fabric is arranged between the underside of the lower molded body and the material layer. Due to the easy penetration of the spacer fabric achieved by the large mesh and / or large porosity and the backflow effect for the air flowing out of the air outlets associated with the arrangement of the material layer, this air spreads uniformly in the plane of the spacer fabric and can thus exit from the air-permeable material layer ubiquitously and in a dampened manner over its entire extent. This avoids drafts for the vehicle occupants in the areas of the material layer and achieves uniform ventilation, in particular surface ventilation, which significantly increases the sense of well-being for the occupants.Particularly advantageous is that the spacer textile spans the entire underside of the lower molded body, allowing the comfort ventilation described in detail above to take place throughout the interior.

[0010] In a further particularly advantageous development of the invention, first fastening elements are integrated into the upper side of the upper molded body, by means of which first fastening elements the interior paneling is releasably secured to the inside of an outer skin of the passenger compartment via second fastening elements arranged there. This results in particularly simple assembly and disassembly of the interior paneling on the inside of the outer skin or an outer panel of the passenger compartment. For a sustainable design of the interior paneling, it is conceivable for the first fastening elements in particular to be made of the same material as at least the upper molded body. Due to the integration of the first fastening elements, they have a defined position so that the interior paneling can be attached to the outer skin very precisely.Furthermore, by incorporating the fastening elements into the formation process of the upper molded body, assembly steps for the first fastening elements on the molded body are eliminated, making the production of the upper molded body and thus also of the interior panel particularly efficient. The fastening elements are formed by snap fasteners and / or clips and / or hook-and-loop elements, which are particularly advantageous because of their simplicity in design and during the fastening process of the interior panel.

[0011] In a further advantageous development of the invention, recesses are formed on the underside of the lower molded body, in which sensor components and / or at least one radiant heating module are arranged. The recesses, which are easy to form during the molded body manufacturing process, create space-saving accommodations for sensor components, which can be arranged in the molding tool of the lower mold and held there by suitable recesses. Of course, it is also possible to fasten these components in the recesses after the lower molded body has been manufactured and subsequently attach the spacer textile and the material layer. The sensor components can be used to detect the user position in the passenger compartment, actively control the air conditioning, heat radiation, and lighting. This control means an increase in efficiency for the vehicle.The vehicle occupant also does not feel like he is being watched because the sensors are not visible - because they are covered.

[0012] At this point, it should be emphasized that the invention also encompasses multiple material layers and multiple spacer textiles. These can be placed on top of one another and / or next to one another.

[0013] By installing a radiant heater, preferably with a controllable output, which can consist of several heating elements arranged in several recesses, the air flowing into the interior of the passenger compartment can be heated, in particular tempered, in a simple and space-saving manner, thereby increasing comfort for the vehicle occupants. External temperature control and heating devices can be omitted. Due to the interaction of the radiant heater with the spacer fabric and the material layer, which together direct the air flowing through the air outlets along the underside of the lower molded body, a surface heating is achieved at the exit from the material layer, which is perceived as particularly pleasant by the respective vehicle occupants due to its uniform temperature distribution.

[0014] It is also conceivable to incorporate lighting devices, for example for ambient lighting, reading lights, or bioactive light, into the recesses. For subdued light, these recesses can still be covered by the material layer and the spacer textile. For direct light, an opening must be left in the material layer and in the spacer textile. In a further advantageous development of the invention, a controllable nozzle is arranged in the at least one air outlet. Using the controllable nozzle, the diameter of the respective air outlet and thus the throughput of the air flowing into the interior of the passenger compartment can be varied, whereby the ventilation intensity for the vehicle occupants can be adjusted as desired.The flow rate may also be varied depending on the interior temperature and / or the air quality and / or the humidity in the passenger compartment, which are monitored by suitable sensors, in particular those located in the interior panelling.

[0015] In a further advantageous development of the invention, the upper surface of the upper molded body is adapted to the contour of the outer skin. This ensures that the inner lining is fully supported by the outer skin, preventing noise from being generated, as the inner lining cannot vibrate during ferry operation.

[0016] A further aspect of the invention relates to a method for producing an interior lining of a motor vehicle passenger compartment. First, an upper molded body and a lower molded body are formed from a lightweight material, and then the two molded bodies are joined together. The two molded bodies are formed on their mutually facing sides such that, when combined, they jointly define an air duct. This air duct is configured such that it has at least one air supply opening and, in the lower molded body, at least one air outlet. An air-permeable material layer is attached to the underside of the lower molded body and covers the at least one air outlet.According to the invention, the two molded bodies are designed as shell-shaped components, each with a mold cavity, in such a way that after the two molded bodies are connected as a composite component, they together form a single air chamber of the air duct, to which the at least one air supply opening and the at least one air outlet are connected.

[0017] It is conceivable to form the molded bodies in a solid, uncontoured manner and then to create the mold cavities, the at least one air supply opening and the at least one air outlet as well as the peripheral contours by means of a machining process such as milling or a cutting process such as laser cutting in order to give the molded bodies their final shape.

[0018] In a particularly advantageous development of the method according to the invention, the molded bodies are formed using a primary forming process, which saves material waste and streamlines the manufacturing process, since all contours and shapes are created during the production of the molded bodies themselves. Injection molding processes, particle foaming processes, or a generative process can be advantageously used here. The particle foaming process allows particularly lightweight structures to be produced with minimal equipment expenditure. Using a generative process such as selective laser sintering also enables delicate structures and highly precise surface formation, particularly of the radii of the air outlets. These two processes generate no cutting waste, thus conserving material resources.

[0019] In a further advantageous development of the method according to the invention, the two molded bodies are joined together by means of a laser welding process or by ultrasonic welding and / or by an adhesive process. Although the connection can alternatively be made using fastening elements, these are not required in the above-mentioned processes. The laser welding process can join the molded bodies together to form a circumferential weld seam. However, if the material of the two molded bodies differs from one another, it is also conceivable for the two molded bodies to be welded on their parting surface using a laser that passes through one of the two molded bodies undamaged at a specific wavelength and welds the other molded body in the parting plane, thereby joining both molded bodies together.

[0020] It is advantageous to use an adhesive process, whereby an adhesive layer is applied to the parting surface of at least one of the two molded bodies, which permanently bonds the two molded bodies when they are placed together. Alternatively, the use of an adhesive is also conceivable which only develops its adhesive properties upon heat treatment, in particular infrared irradiation. This has advantages during assembly, as the two molded bodies do not have to be placed precisely on top of one another straight away, but can be aligned to one another in the system. In combination with the particle foaming process, it is even conceivable to coat the granules required to form one of the molded bodies with an adhesive, so that the other already formed molded body is positioned in the foaming tool and, as the other molded body is formed, is adhered to it by the adhesive in the granules.

[0021] In a particularly advantageous development of the invention, first fastening elements are introduced into the upper side of the upper molded body as inserts during the molding process, by means of which first fastening elements, after solidification of the upper molded body and connection of the two molded bodies, the interior paneling is releasably secured to the inside of an outer skin of the passenger compartment via second fastening elements arranged there. The first fastening elements are enclosed during the manufacturing process of the upper molded body and are thus immovably fixed in a predefined position. The interaction of the first and second fastening elements enables simple and rapid assembly and disassembly, whereby the design of the fastening elements as snap fasteners and / or clips and / or Velcro elements means that the interior paneling can be attached by just one fitter without great effort.It is advantageous to form the first fastening elements in the form of clips and / or snap fasteners as a material-fit component of the upper molded body during the primary molding process, thereby reducing the number of components for the interior paneling.

[0022] In a further advantageous development of the method according to the invention, a large-mesh and / or large-pore spacer fabric is attached between the underside of the lower molded body and the material layer. This fabric, like the material layer, can be glued to the lower molded body. In an advantageous, process-economical development of the method according to the invention, it is also conceivable for the spacer fabric and / or the material layer to be used as an insert in the molding tool during the primary molding process of the lower molded body and to be glued to it during the molding process or to be surrounded by the material of the lower molded body being formed in a form-fitting manner, in particular by back-foaming or back-injection molding.

[0023] For a particularly sustainable production of the interior paneling, it is conceivable that its components according to the invention consist largely of the same or a similar material, so that when the interior paneling is replaced and disposed of, the recycling and, if necessary, the reprocessing of the material into a new paneling is simplified.

[0024] The paneling according to the invention can also be used for all trucks, buses, transporters, vans, mobile homes, and cars. The interior paneling is preferably used as a headliner, which is attached to the roof skin of a vehicle roof that forms the outer skin. It is also conceivable that the interior paneling could be used for the side walls and rear wall of a passenger compartment. For the latter applications, the terms "top" and "bottom" should be understood to mean "outside" and "inside." This means, for example, that the upper molded body is now the outer molded body, and its underside forms the inner side. The same applies to the lower molded body.

[0025] The invention is explained in more detail below with reference to embodiments shown in the drawings.

[0026] Shown are: Fig. 1 Partially in a lateral longitudinal section of an inventive

[0027] Interior paneling with a nozzle integrated in an air outlet and an outer skin of a passenger cell to be equipped with the interior paneling,

[0028] Fig. 2 Detail in a lateral longitudinal section of an inventive

[0029] Interior paneling with a spacer textile and an outer skin of a passenger cell to be equipped with the interior paneling.

[0030] In Fig. 1, a section of an interior panel as roof lining 1 of a

[0031] Motor vehicle passenger cell, in particular a vehicle cabin of a commercial vehicle, which is to be fastened to the inside 2 of a roof skin 3 of a vehicle roof 4 of the vehicle cabin, wherein the roof skin 3 is representative of all outer skin parts of the passenger cell.

[0032] The headliner 1 essentially comprises an upper molded body 5 and a lower molded body 6, each made of particle foam, in particular EPP (expandable polypropylene) or EPE (expandable polyethylene). In addition to lightweight construction, the use of these types of materials offers advantages in sound and heat insulation of the driver's cab. Furthermore, due to their thermoplastic basis, they are easy to recycle and can be easily reprocessed through heat treatment. The two separately manufactured shell-shaped molded bodies 5 and 6 are placed on top of one another and have form-locking elements 9 and counter-form-locking elements 10 on their mutually facing sides 7 and 8, by means of which they are positioned on top of one another and which are designed in the form of prismatic formations and negative-shape depressions.The recesses and depressions have sloping flanks 11, 12, which make it easier to find the two molded bodies in their relative position to one another. In order to always assume the correct relative position to one another in a clear manner, the pairs of form-locking elements 9 and counter-form-locking elements 10 are arranged according to the poka-yoke principle, so that no assembly errors can occur during the manufacture of the headliner 1. In order to permanently fix the two molded bodies 5 and 6 to one another, an adhesive layer 13 is applied before they are placed on top of one another. This adhesive layer 13 must already be applied to side 7 and / or 8 of the molded bodies 5 and 6, so that after the two molded bodies 5 and 6 are placed on top of one another, the two are glued together.

[0033] The molded bodies 5 and 6 have, on their mutually facing sides 7 and 8, outside the bonding region 14, mold cavities 15 and 16, which form an air duct 17 when the two molded bodies 5 and 6 are joined. The air duct 17 comprises an air supply opening 18 and an air outlet 19 formed in the lower molded body 6, as well as an intermediate air chamber 20, from which the air outlet 19, which is mentioned here as representative of several, branches off and is directed toward the interior 21 of the passenger compartment or vehicle cabin. Air is conveyed via the air supply opening 18 into the air chamber 20 by means of a fan, which is then fed to the interior 21 of the vehicle cabin.

[0034] A large-mesh and / or large-pore spacer textile 23 in the form of a textile layer is arranged and secured—in particular by adhesive—on the underside 22 of the lower molded body 6, said spacer textile 23 spanning the entire underside 22 of the lower molded body 6. The spacer textile 23 covers all air outlets 19 toward the interior 21. The spacer textile 23 can be a woven, warp-knitted, braided, nonwoven, or felt fabric. An air-permeable material layer 24 is arranged and secured to the spacer textile 23 toward the interior 21, which also spans the entire underside 22 of the lower molded body 6 and covers the air outlets 19. The material layer 24 serves, on the one hand, to back up part of the air flowing from the air outlets 19, which then spreads into the plane of the spacer textile 23, i.e. along the underside 22 of the lower molded body 6, and penetrates the material layer 24 to exit into the interior space 21.On the other hand, the material layer 24 serves as a decorative layer. In the present exemplary embodiment, a controllable nozzle 25 is arranged in the respective air outlet 19. The nozzle 25 can be inserted into the lower molded body 6 after the roof liner 1 has been completed, in particular by clipping or pressing it in using locking hooks 27. However, it is also possible to include the respective nozzle 25 as an insert during the manufacturing process of the lower molded body 6, forming a positive or frictional connection. The nozzle 25 has closing elements 26 that can be pivoted between an open position and a closed position, assuming any possible pivoting angle and thus being able to finely regulate the ventilation intensity. The nozzle 25 has an end-side annular collar 28, by means of which the nozzle 25 can be clipped in more easily and forms a stop via which the nozzle 25 is held in a precisely positioned position on the lower molded body 6.

[0035] First fastening elements 30, which are formed by hook-and-loop elements, are integrated into the upper side 29 of the upper molded body 5, the contours of which are adapted to the shape of the roof skin 3. However, these can alternatively also be snap fasteners or clips, or a mixture of the types of fastening elements 30. The integration takes place here by foaming during the manufacturing process of the upper molded body 5. If the upper molded body is produced using an injection molding process, the integration takes place analogously by overmolding. The first fastening elements 30 can also be applied to the upper molded body subsequently after it has been produced, in particular by gluing, clipping, or pressing. If manufactured by injection molding, the fastening element 30 could also be directly molded.When attaching the headliner 1 to the inside 2 of the roof skin 3 of the vehicle roof, the first fastening elements 30 interact with functionally corresponding second fastening elements 31, which are fixed to the inside 2 of the roof skin 3. The fixing can take place directly on the inside 2 of the roof skin 3. In the present case, hat profiles 32 are attached to this, to whose end face 33 the second fastening elements 31 are fixed. During the connection process of the headliner 1 to the roof skin 3, the hat profiles 32 dip into receiving recesses 34, which are formed on the upper side 29 of the upper molded body 5 and at whose base 35 the first fastening elements 30 are arranged. Through the interaction of the hat profiles 32 with the receiving recesses 34, the headliner 1 and roof skin 3 are aligned in the desired relative position to one another, thus avoiding assembly tolerances.The first and second fastening elements 30 and 31 are designed in such a way that replacement and thus disassembly of the headliner 1 can be made possible in a simple manner.

[0036] In an alternative embodiment of the invention according to Fig. 2, in deviation from the embodiment of Fig. 1, a roof liner 49 is shown as the interior paneling, in which recesses 36, 37 and 38 are formed on the underside 47 of the lower molded body 45, in which recesses 36, 37 and 38 sensor components 39 and two radiant heating modules 40 and 41 are arranged. As can be seen, a plurality of narrow air outlets 48 open out on the underside 47 of the lower molded body 45, whereby the integration of nozzles 25 from Fig. 1 has been omitted. In Fig. 2, the two mold cavities 42 and 43 of the upper and lower molded bodies 44 and 45 are relatively flat, so that the air chamber 46 formed by the mold cavities 42 and 43 has the shape of a flat tube, whereby the pressure of the air supplied by the blower remains largely unchanged. All other features of the headliner 49 can be seen in Fig. 1 and have remained the same in their function and design.Finally, it is also conceivable to provide further recesses not shown here, which either serve as condensate drains themselves or accommodate pipes for this purpose.

Claims

Patent claims 1. Interior lining of a motor vehicle passenger compartment, which includes an upper and a lower molded body made of a lightweight material, which are connected to one another and whose mutually facing sides together form an air duct which has at least one air supply opening and at least one air outlet formed in the lower molded body, and wherein the interior lining has an air-permeable material which is connected to the underside of the lower molded body and covers the at least one air outlet, characterized in that the two molded bodies (5, 6; 44, 45) are shell-shaped and each have a mold cavity (15, 16; 42, 43), wherein the two mold cavities (15, 16; 42, 43) together form a single air chamber (20, 46) of the air duct (17), to which the at least one air supply opening (18) and the at least one air outlet (19, 48) are connected.

2. Interior lining according to claim 1, characterized in that at least one of the two molded bodies (5,6; 44,45) consists of a particle foam or is an injection-molded component.

3. Interior lining according to one of claims 1 or 2, characterized in that the two shaped bodies (5, 6; 44, 45) are connected by means of an adhesive layer (13).

4. Interior lining according to one of claims 1 to 3, characterized in that the two shaped bodies (5,6; 44,45) have on their facing sides (7,8) form-fitting and counter-form-fitting elements (9,10) by means of which they are positioned on one another.

5. Interior lining according to claim 4, characterized in that the pairs of form-locking and counter-form-locking elements (9, 10) are arranged according to the poka-yoke principle on the mutually facing sides (7, 8) of the shaped bodies (5, 6; 44, 45).

6. Interior lining according to one of claims 1 to 5, characterized in that a large-mesh and / or large-pore spacer textile (23) is arranged between the underside (22, 47) of the lower molded body (6, 45) and the material layer (24).

7. Interior lining according to one of claims 1 to 6, characterized in that the spacer textile (23) spans the entire underside (22,47) of the lower molded body (6,45).

8. Interior paneling according to one of claims 1 to 7, characterized in that first fastening elements (30) are integrated into the upper side (29) of the upper molded body (5, 44), by means of which first fastening elements (30) the interior paneling (1, 49) is detachably fixed to the inside (2) of an outer skin (3) of a passenger compartment via second fastening elements (31) arranged there.

9. Interior lining according to claim 8, characterized in that the fastening elements (30, 31) are formed by snap fasteners and / or clips and / or Velcro elements.

10. Interior lining according to one of claims 1 to 9, characterized in that recesses (36, 37, 38) are formed on the underside (47) of the lower molded body (45), in which sensor components (39) and / or at least one radiant heating module (40, 41) are arranged.

11. Interior paneling according to one of claims 1 to 10, characterized in that a controllable nozzle (25) is arranged in the at least one air outlet (19).

12. Interior lining according to one of claims 1 to 11, characterized in that the upper side (29) of the upper molded body (5, 44) is adapted to the shape of the outer skin (3).

13. Interior lining according to one of claims 1 to 12, characterized in that the particle foam consists of EPP (expandable polypropylene) or EPE (expandable polyethylene).

14. A method for producing an interior lining of a motor vehicle passenger compartment, wherein an upper molded body is connected to a lower molded body, wherein the molded bodies consisting of a lightweight material are formed on their mutually facing sides in order to jointly delimit an air duct which has at least one air supply opening and at least one air outlet in the lower molded body, wherein an air-permeable material layer is applied to the underside of the lower molded body and covers the at least one air outlet, characterized in that the two molded bodies (5, 6; 44, 45) are formed as shell-shaped components, each having a mold cavity (15, 16; 42, 43), which, after the connection of the two molded bodies (5, 6; 44, 45), together form a single air chamber (20, 46) of the air duct (17), to which the at least one air supply opening (18) and the at least one air outlet (19, 48) are connected.

15. The method according to claim 14, characterized in that the shaped bodies (5,6; 44,45) are formed by means of a primary forming process.

16. The method according to claim 15, characterized in that the primary forming process is an injection molding process, a particle foaming process or a generative process.

17. Method according to one of claims 14 to 16, characterized in that the two shaped bodies (5, 6; 44, 45) are joined together by means of a laser welding process or by ultrasonic welding and / or by an adhesive process.

18. Method according to one of claims 14 to 17, characterized in that first fastening elements (30) are introduced into the upper side (29) of the upper molded body (5, 44) as inserts during the molding, by means of which, after solidification of the upper molded body (5, 44) and the connection of the two molded bodies (5, 6; 44, 45), the inner lining (1, 49) is detachably fixed to the inside (2) of an outer skin (3) of the passenger compartment via second fastening elements (31) arranged there.

19. Method according to one of claims 14 to 18, characterized in that a large-mesh and / or large-pore spacer textile (23) is fastened between the underside (22, 47) of the lower molded body (6, 45) and the material layer (24).

20. The method according to claim 19, characterized in that the spacer textile (23) is used as an insert in the shaping tool for the lower shaped body (6, 45) and is glued to it during the shaping process or is surrounded by it in a form-fitting manner by the lower shaped body (6, 45) being formed.

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