EP2323827A1

EP2323827A1 - Process for producing a lining part for a vehicle, and lining part

Info

Publication number: EP2323827A1
Application number: EP09781296A
Authority: EP
Inventors: Frank Heisler
Original assignee: Takeo GmbH
Current assignee: Takeo GmbH
Priority date: 2008-07-30
Filing date: 2009-07-30
Publication date: 2011-05-25
Also published as: WO2010012808A1; WO2010012808A9; DE102008035478A1

Abstract

The invention proposes a process for producing a lining part (1) for a vehicle, wherein the edge (6) of at least one plastic-containing slab (2) is inserted in a frame (15), the frame (15) is placed in a furnace (20), in which the at least one slab (2) is heated and, if appropriate, swells, the at least one slab (2) is pressed into shape when it is still hot, and an injection moulding material is moulded onto at least one region of said edge (6) of the at least one slab (2) in an injection mould (25). The invention also proposes a corresponding lining part (1).

Description

Method for producing a vehicle cladding part as well as

Verkleidunqsteil

The invention relates to a method for producing a trim part for a vehicle and to such a trim part.

Covering parts are used in a variety of ways, especially in vehicle construction as underbody cladding or as wheel arch liners. In particular, these parts also perform acoustic shielding functions, i. Sound absorption and sound insulation. It is known to use calendered plates having a monolayer or multilayer structure for this purpose, corresponding to the specific geometries and functional requirements, the latter comprising, for example, a core layer with glass fibers embedded in polypropylene (PP) as well as a top and a top cover layer. Such panels are heated in a furnace according to a prior art method, wherein the material (s) become fluid by the heat and the glass fibers set up so that the panel swells. The plate can then be mechanically or manually grasped and placed in a pressing tool in which it is pressed into its three-dimensional shape, in which it cools after removal from the pressing tool and solidifies. Subsequently - or still in the warm state - the deformed plate is cut into its intended for installation final shape and optionally encapsulated with a narrow plastic edge.

A disadvantage of this and other known methods is that the plates must be cut depending on the application. This results in a large waste, which causes high costs.

It is an object of the present invention, a method for producing a trim part and such a trim part available to provide, in which the disadvantages of the prior art are avoided.

This object is solved by the features of the independent claims.

The advantages of the invention are to be seen in particular in that, according to the method according to the invention, said edge of the plate containing at least one plastic material is injected. The edge - if at least one plate is still in the frame or taken out - so only little, or - with special advantage - no longer needs to be cut before spraying. Rather, prefabricated, geometrically advantageous cut sheets (one or more) can be used, wherein the trim panel occupies its final peripheral geometry only by the molded edge. This may differ substantially from the peripheral geometry of the at least one plate, so occupy surfaces of which no or only a smaller part with the previously clamped in the frame edge is identical. Injection also ensures that the edges of the plates do not fray and develop dust or expose glass fibers (if used).

The use of a - preferably circumferential and thus the at least one plate completely edge-spanning - frame prevents the plate in the furnace contracts, ie it is counteracted their shrinkage tendency. In the context of the present application, the term furnace refers to devices for heating the plates used for the lining part according to the invention. For example, devices with one or more heating fields are understood here. The ovens can accommodate the plates in particular horizontally or vertically. The at least one plate may contain one or more plastics or plastic mixtures with or without additionally introduced materials, for example artificial and / or natural fibers. These variants are all included in the term "plastic containing".

Particularly preferred is at least a portion of the previously clamped in the frame edge (the plate is still in the frame or may have been removed from the frame) molded without prior cutting of the edge in the injection mold, the term "spraying" and the "overmolding" includes. In this way, no waste is produced here, so that resources and the environment are spared while at the same time achieving considerable cost savings.

It is particularly advantageous if the pressing and the injection molding are carried out in the same tool. In this way, the manufacturing process can be shortened, tool costs can be saved. For this purpose, the tool particularly preferably clamps the at least one plate under compression in the vicinity of or in the edge region in which the plate was previously held in the frame, with an outside region of the edge still protruding beyond the clamped, pressed region. The injection molding material is then injected at this edge region.

In this case, it is particularly advantageous if the plate is enclosed in the injection mold in a sealed manner towards the inside, next to the edge previously held in the frame, to form a web. This arrangement prevents injection molding compound from passing the web during injection molding of said edge region and from flowing to the regions of the relevant plate located further inwards. During injection molding of the said edge region, a peripheral edge-side thickening adjoining the web is created, on which the trim part can be applied to a vehicle element during later installation, for example. Alternatively, an area of the edge of the at least one plate which is held in the frame forms both a web and an adjoining outside edge region, this web likewise being sealingly gripped on its top and bottom in the injection molding tool and, when the edge region is sprayed on, touching the web Bridge on the outside adjoining marginal thickening arises.

The said web and the said thickening may orbit around the entire plate or even occupy only a portion of the plate edge.

More preferably, a plurality of plates are arranged side by side in the injection mold. In the injection mold then the outer edges of the trim panel, the edges in the spaces between the plates and the gaps themselves are completely splashed or ejected. Accordingly, by molding the outer edges of the outer plates, the covering part receives a thickening formed along its entire circumference. Alternatively, here too, the thickening may be provided only along one or more spaced-apart or separate regions of the trim part.

When using multiple plates, it is advantageously possible to use plates (one or more) of substantially rectangular cut. For example, from a large plate heated and deformed in the frame, it is possible, by suitable cutting, to obtain several small plates without leaving any relevant quantities of waste. Alternatively and preferably, the respective plates are clamped in individual frames and each heated individually, for example horizontally next to each other in appropriately trained and preferably separately controllable heating fields. With both methods, in turn, costs are saved and the amounts of waste are drastically reduced compared with the prior art with the generally non-rectangular geometries. The outer regions of the edge of the at least one plate preferably melt by contact with the hot injection molding material, so that after cooling a durable and permanent, permanent connection is realized. In this case, the injection molding material can adhere to the glass fibers (if present) projecting into the cavity. As extensive tests have shown, the web, on which the injection mold fixed the plate edge and no injection material passes, in the finished trim part also stable enough to withstand high loads.

Preferably, the frame in the contact region with the plate on the adhesion reducing contact pieces. Here, for example, offers Teflon. The plate can then be easier, i. without adhesive effect, remove from the frame.

So that the edge clamped in the frame does not start to flow due to the heating in the oven, the frame in the region of the receptacle of the at least one plate can advantageously be cooled with a coolant. Here, in the frame, for example, a circumferential hollow conduit may be present, is passed through the cold water o. The like. Alternatively or additionally, other cooling methods may be used to prevent the edge of the plate from heating above the melting point and starting to flow.

In this way, the said web can also be kept at such a low temperature that it does not itself start to melt in the often subsequent injection molding in such a way that the hot liquid injection molding compound can reach the regions of the plate lying further inside.

In the plate to be heated in the oven, receptacles are preferably provided at the edge, on which the plate is gripped by a robot after heating in the oven and inserted into the injection and injection mold becomes. The recordings can also be used for positionally accurate insertion into the frame, which then has corresponding means with the recordings. Alternatively, suction cups may be provided on a robot, which engage the frame.

According to an advantageous embodiment, the at least one plate is removed from the frame before being pressed. According to the above, after the removal of the frame, pressing and injection molding in a common tool are preferable. According to an alternative, the plate is taken out of the frame after compression and before injection.

According to another preferred variant of the method according to the invention, the at least one plate remains in the frame during the heating, pressing and injection, so that the transport between the different tools is facilitated. Instead of directly transporting the at least one plate, it can always remain in the frame, which is instead grasped during transport. In this case, the frame expediently has connections for introducing the injection-molding material.

The invention also includes a cowling according to the independent device claim. The lining part according to the invention in this case has at least one plate which has been pressed into its desired three-dimensional shape in the heated and (possibly depending on the material properties and / or composition of the plate) swollen state in a press. The trim panel according to the invention also has at least one in the region of its edge caused by compression web, wherein an adjoining the at least one web edge of the plate is injection-molded with an injection molding material, for example by Umsphtzung. The web is compared to the edge thickening produced by injection molding and further compressed inside three-dimensional sional areas (which do not necessarily have to be connected directly to the bridge) of lesser height.

According to the above, the at least one plate after pressing at the edge is molded uncut with the injection molding material. Cutting after compression is not necessary because the edges of the plates do not fray after injection. This aspect of the injection of the at least one plate not previously cut to size can also be regarded as an independent aspect of the invention.

In this case, one or more plates, which are geometrically advantageously cut before the pressing process and then arranged next to one another - in particular those with a rectangular blank - may be used, the lining part only assuming its final circumferential geometry through the molded-on edge. This can deviate substantially from the circumferential geometry of the at least one pressed plate, ie also occupy surfaces of which no or only a small part is identical to the edge previously clamped in the frame. This aspect of the use of several, preferably substantially rectangular cut, juxtaposed plates can also be regarded as an independent invention aspect.

Particularly preferably, the at least one panel of the trim part comprises a LWRT (Low Weight Reinforced Thermoplastic) material. This is particularly lightweight, which contributes to the weight reduction of the vehicle. In this case, in particular a core layer, in particular a thermoplastic polymer matrix with reinforcing fibers contained therein, in particular glass fibers, comes into consideration. When heated, the thermoplastic melts, the reinforcing fibers orient themselves under partial erection new and the core layer and thus the entire plate swells up. In this malleable state, the plate can be pressed in a pressing tool in the desired three-dimensional shape. The said core layer preferably contains polypropylene or a polyamide. Other suitable thermoplastics can also be used for thermoforming.

At least one cover layer is preferably arranged on both sides of the core layer, for example a film on one side, preferably of polypropylene, and on the other side a cover layer as cover fleece, for example made of PET (polyethylene terephthalate) with textile fibers contained therein.

The trim part according to the invention particularly preferably has a plurality of plates arranged next to one another, which are connected to one another by the injection molding material. The trim part can thus be optimally adapted to the mechanical and acoustic requirements. If high acoustic shields are required in each of two separate areas of the cladding part, for example an underbody cladding, in each case a slab pressed into the appropriate shape and connected to injection molding material is used in each case. In this way, it is also possible to use essentially rectangular cut sheets. In contrast, in the prior art for the same purpose a large, appropriately tailored and therefore rarely used in the rectangular plate that causes large quantities of waste.

By using multiple plates, these can each consist of different materials, which can therefore meet other requirements accordingly. For example, a first portion of a trim panel formed as an underbody panel may extend in the vicinity of the hot and loud exhaust system, while a second portion merely serves to insulate the sound of another vehicle area and therefore only has to withstand lower temperatures. According to the invention, a plate with a polyamide which has a high temperature can then be used for the first region. temperature resistance (eg 340 ° C and higher) can be used, while as a plate for the second region of the cheaper and less low-temperature polypropylene comes into question. In this way, for example, no expensive aluminum, which could also be used for thermal insulation in the exhaust area, used.

Various embodiments will be explained in more detail with reference to the drawing, wherein like reference numerals designate like or functionally equivalent components; show it

Fig. 1 is a plate, viewed schematically from the side;

Fig. 2, the plate of Figure 1 clamped in a frame and placed in an oven, schematic side view.

FIG. 3 shows the situation according to FIG. 3 after heating the plate in the oven; FIG.

Fig. 4 shows the deformation of the plate in a press and subsequent lateral injection of injection molding compound;

FIG. 5 shows the trim part taken from the press and cooled; FIG.

Fig. 6 is a plan view of a trim panel with three processed panels;

Fig. 7 is a plan view of another trim panel with five processed panels;

8 shows a further embodiment of a combined tool with press and injection mold; 9 shows a further embodiment of a combined tool with press and injection mold;

Fig. 10 shows a variant of a frame with inserted plate, introduced into a tool for simultaneous pressing and injection molding.

Fig. 1 shows schematically a multilayer plate designed as a plate 2 from the side. This has, for example, an overall thickness of 2.5-5 mm, is essentially rectangular in plan view (see FIGS. 6 and 7) and in the present case consists of a core layer 3 with an upper cover layer 4 and a lower cover layer 5. The core layer 3 has a thermoplastic matrix, for example containing polypropylene, as well as embedded therein reinforcing fibers, preferably glass fibers. The melting point of the glass fibers is higher than the melting point of the plastic matrix. Such a core layer is thus formed from a LW RT material. The upper cover layer 4 is, for example, a cover fleece of PET (polyethylene terephthalate) with textile fibers contained therein, while the lower cover layer 5 is formed as a film, preferably of polypropylene. For reasons of simplicity, the plates 2 are shown in FIGS. 2-8 without the illustration of the aforementioned multi-layer structure.

The plate 2 is clamped in the illustration according to FIG. 2 in a peripheral frame 15, which is also rectangular when viewed from the side and has two opposing sub-frames 15a, 15b. The sub-frames 15a, 15b, which in the present case project beyond the edge 6 of the plate 2, have contact pieces 16 on the sides facing the plate 2 on which the plate 2 rests. Optionally, in the sub-frame 15 also extending hollow lines 17 are formed (shown in phantom), can be passed through the cooling medium. The use of different coolants and other cooling methods is possible. The frame 15 with inserted plate 2 is inserted as shown in FIG. 2 in a furnace 20, which in the present case two support members 21 arranged thereon, directed to the interior infrared emitters 22 includes. The radiators 22 heat the plate 2 to a temperature at which in particular the thermoplastic matrix of the core layer 3 starts to melt and the reinforcing fibers contained therein rise, so that the plate 2 swells, with the exception of the rim 6 peripherally clamped in the frame 15, for example until to 18 mm. This situation is shown in FIG. Since the edge 6 is not heated directly, the plate 2 remains in this area below the melting temperature. Also, the optional coolant prevents overheating of the rim 6. According to a corresponding embodiment, the core layer contains polypropylene which has a melting temperature in the range of 160 ° C to 165 ° C. Applied to the embodiment shown, this means that the plate is heated in the unrestrained region to, for example, 200 ° C, while its temperature in the region of the edge 6, for example, does not exceed 150 ° C.

The frame 15 together with the plate 2 is inserted into the furnace 20 in accordance with FIGS. 2 and 3 in a horizontal or else in a vertical position. In the latter case, the frame 15 may be suspended from a rail and continuously conveyed through the furnace 20.

After heating in the oven 20, the plate 2 is removed from the frame 15. Due to the contact pieces 16 made of Teflon, the edge 6 can be easily detached from the frame 15. The plate 2, which is shown dotted in Figs. 4, 8, 9 and 10 for the sake of clarity, is spent in the swollen and pressable state in a tool 25, which is designed both as a press and as an injection mold, s. 4. The tool 25, which is preferably designed to receive the plate 2 horizontally, has, in relation to its pressing function, a lower pressing element 26 and an upper pressing element 27 (shown hatched in each case). represents), which press the plate 2 when closing the press in its desired final shape. According to FIG. 4, these regions (here denoted by reference symbols 8, 9) have different thicknesses and three-dimensional shapes, depending on the geometric and structural (in particular with regard to rigidity) and acoustic requirements of the installation location in the vehicle. The thickness of the regions 8, 9, of which, of course, more than two can be distributed over the plate 2, for example, in the range of 1, 2 - 15 mm. The thin areas are used in particular for stiffening, the thicker fulfill mainly acoustic functions.

The two pressing elements 26 and 27 are designed such that they constrict the plate 2 between the edge 6 and the area 8 to a web 7 with low height sealing. The pressing force of the pressing elements 26, 27 in this area is selected to be correspondingly high. At an initial thickness of 5 mm of the plate 2, this is constricted in the region of the web 7, for example, to 1 - 1, 5 mm.

The pressing elements 26, 27 are designed in such a way that the edge 6 adjoining the web 7 on the outside is received in a cavity 28 (so-called cavity) which in the present case has the same height as the edge 6. The cavity 28 runs according to a variant along the edge 6 around the plate 2 around. In the cavity 28 lead from the outside and over the circumference distributed several lines 29, is injected through the injection molding compound (see small arrow) into the cavity 28. It can be used here on familiar, familiar to those skilled materials. The hot injection molding material melts the edge 6 at its accessible outside or outside areas and connects to this inextricably. Due to the pincer-like sealing enclosing of the pressing elements 6, 7 in the region of the web 7, no injection-molding material can reach into regions lying further inwardly beyond the web 7. In this way, a trim panel 1 according to the invention, the at least one plate 2 including the preferably circumferential ridge 7 and a thickening 10 at the Edge includes. 5 shows the corresponding section of the finished trim part 1, after it has been removed from the tool 25. The thickening 10 is usually produced with not shown here rounded edges. The height or thickness of the thickening 10 is for example in the range of 2 - 3 mm.

FIGS. 6 and 7 show two different embodiments of a trim part 1 according to the invention, here designed as a schematic underbody paneling, with three or five panels 2 in plan view. Circumferentially, a border-side thickening 10 is present in both lining parts 1, which has been realized by injection molding in each case an outer part of the edges 6 held in correspondingly formed frames 15 (see FIGS. It can also be seen that around each plate 2 circumferential web 7, with which the respective plate 2 was clamped in the tool 25. The intermediate spaces between two plates 2 or their webs 7 are likewise in the same way by injection molding of the edges 6 extending beyond the webs 7 (cf., Fig. 2-4) and - if the edges 6 have a distance from each other - ejection of the intermediate space realized between the edges 6. In this way, the edge-side thickenings 11 are obtained between two webs 7 of adjacent plates 2. The term "edge" here refers to the respective plate. 2

As can also be seen from FIGS. 6 and 7, it is possible to use exclusively or predominantly rectangular blanks of plates 2 for producing a trim part 1 according to the invention. It is thus possible to cut a large plate after heating in the oven in the smaller rectangular plates 2 and insert it into the press. Alternatively, it is possible to cut larger plates prior to heating to the respective sizes required in the press and to heat the thus obtained multiple rectangular plates 2 in their respective sizes in smaller sizes in the oven, preferably by means of separate ones Heating fields. This cutting must not be confused with the cutting of ready-pressed and high blanks causing prior art panels.

The plurality of plates 2 may each consist of different materials. For example, the plate 2 on the left in FIG. 6 may include polyamide as a thermoplastic in the core layer while in the two right plates 2 polypropylene is used which has a lower melting point than polyamide. Below the polyamide plate can then, for example, a high temperature developing exhaust train 12 (shown schematically in dashed lines in Fig. 6) are performed.

In Fig. 8, an alternative embodiment of the tool 25, which combines a press and an injection mold, is shown. The essential difference with respect to the tool 25 according to FIG. 4 consists in the formation of the cavity 28 in such a way that the edge 6 is also injection-molded from the top and bottom side. The resulting edge-side thickening 10 (see Fig. 5) is therefore thicker and possibly more stable, since the injection molding material finds larger attack surfaces on the edge 6 and thereby greater mixing with the material of the edge 6 can result.

In addition, FIG. 8 diagrammatically shows one of a plurality of receptacles 6a distributed over the circumference and designed as through-holes. These serve to receive in the frame 15, which in this case has corresponding circumferential and correspondingly formed pins (not shown). By means of the pin-receiving arrangement, the plate 2 can be clamped in a simple manner in the frame 15. The receptacles 6a can also be used to transport the plate 2 after removal from the frame 15 by means of a robot. The robot, which advantageously also has corresponding pins in this case, serves primarily for the introduction of the plate 2 into the oven 20. The tool 25 according to FIG. 8 is finally able to inject the receptacles 6a, then that they no longer appear in the finished trim part 1 and thus, for example, can not cause any acoustic disadvantages. Instead of providing recordings in the plates 2, a transport robot can also attack with suction cups on the frame and transport the frame according to the next tool.

In Fig. 9 it is shown that the web 7 can retain the original thickness of the plate 2, so is not further constricted compared to the original thickness of the plate 2. The clamped in the frame 15 edge 6 may be larger here, with a part of the edge 6 to the web 7 and a further outwardly arranged part of the injection-molded material and injected to the edge thickening 10 is.

10 shows a further embodiment is shown, in which the frame 15 with inserted plate 2 (shown dotted again) in both a furnace 20 and in a press and an injection mold comprehensive tool 25 can be introduced. According to FIG. 10, the frame 15, together with the plate 2, has already been heated in an oven 20 and is now inserted into the tool 25 manually or with a robot. The circumferential web 7 as well as the inside adjoining areas of the plate 2 are pressed by the press in its final form. Injection molding compound (see arrow) is in turn injected into the cavity 28 by the lines 29 distributed over the circumference of the frame 15 and the thickening 10 on the edge side is produced. Since the contact body 16 made of Teflon (shown here in dashed lines for clarity) have a melting point of above 300 ° C, they do not melt through the injection molding material, which has a temperature of for example 180 ° C. Possibly. can be dispensed with the contact body 16 also.

Instead of the multilayer plates shown in the figures, a single-layered plate 2 can also be used. These are particularly useful for the production of wheel arch liners, which are another example of an invented According to the fairing part. The plates used for this purpose, for example, in addition to one or more suitably selected plastics (for example, polypropylene) textile fibers. These plates do not swell on heating, but can be pressed in the desired state in the warm state.

In the context of the claims, other embodiments are possible deviating from the illustrated embodiments, for example, another structure of the plates with more or fewer layers and / or with other materials. It is also possible that a plate is molded on only one or not all edge sides (or even only a part thereof). Also, according to an alternative, the press and the injection mold can be designed as separate tools.

Claims

Patent claims

A method of manufacturing a trim panel (1) for a vehicle, wherein:

- At least one plastic-containing plate (2) is inserted with its edge (6) in a frame (15),

- The frame (15) is placed in an oven (20) in which the at least one plate (2) is heated and possibly swells,

- The at least one plate (2) is pressed in the still heated state in the form, and

- At least a portion of said edge (6) of the at least one plate (2) in an injection mold (25) is injection-molded with an injection molding material.

2. The method according to claim 1, characterized in that said edge region (6) without prior cutting in the injection mold (25) is molded.

3. The method according to any one of the preceding claims, characterized in that the pressing and the injection molding in the same tool (25) are performed.

4. The method according to any one of the preceding claims, characterized in that the at least one plate (2) in a region which directly adjoins the edge (6) held in the frame (15), constricted to a web (7) and this Web (7) on its top and bottom in the injection mold (25) is sealingly embraced, so that when molding said edge region (6) to the web (7) subsequent edge thickening (10, 1 1) arises and no injection molding compound on the beyond the web (7) further inside areas of the relevant plate (2) can flow.

5. The method according to any one of the preceding claims, characterized in that in the frame (15) held portion of the edge (6) of the at least one plate (2) acts as a web (7) and this web (7) on its upper and Bottom in the injection mold (25) is sealingly embraced, so that during injection molding of said edge region (6) on the web (7) on the outside adjoining marginal thickening (10, 11) is formed and no injection molding on the beyond of the web (7) on inside areas of the relevant plate (2) can flow.

6. The method according to any one of the preceding claims, characterized in that a plurality of pressed in the form of plates (2) in the injection mold (25) arranged side by side and both the free edges (6) and the edges (6) in the spaces between the plates (2) at least partially re-injected or sprayed as well as these spaces themselves be injected seamlessly.

7. The method according to any one of the preceding claims, characterized in that a plurality of plates (2) are used from substantially rectangular blanks for the production of a trim part (1).

8. The method according to any one of the preceding claims, characterized in that during injection molding of the edge (6) of the at least one plate (2) melts through the hot injection molding material and connects inextricably with this.

9. The method according to any one of the preceding claims, characterized in that the frame (15) is formed circumferentially and thus the at least one plate (2) is completely clamped at the edge.

10. The method according to any one of the preceding claims, characterized in that the edge (6) of the at least one plate (2) with the frame (15) with a adhesion reducing contact piece (16), preferably made of Teflon, is brought into abutment.

11. The method according to any one of the preceding claims, characterized in that the frame (15) is cooled in the region of receiving the at least one plate (2) with a coolant.

12. The method according to any one of the preceding claims, characterized in that at the edge receptacles (6a), preferably holes or the like., Are generated, on which the plate (2) gripped by a robot after pressing and inserted into the injection mold (25) becomes.

13. The method according to any one of the preceding claims, characterized in that the at least one plate (2) is removed from the frame (15) before the pressing and / or before the transfer or injection molding.

14. The method according to any one of claims 1 -11, characterized in that the at least one plate (2) during heating, compression and molding or spritzing in said frame (15) remains.

15. cowling (1) for a vehicle with at least one plastic contained plate (2) with a after heating and possibly swelling realized by pressing three-dimensional shaping, with an existing by injection molding of an injection molding material, at least partially present edge thickening (10, 1 1), said at least one plate (2) in comparison to the edge thickening (10, 1 1) and one further inner, deformed region constricted web (7).

16. cowling according to the preceding device claim, characterized in that the at least one plate is molded on the edge side uncut with the injection molding material.

17. cowling according to one of the preceding device claims, characterized in that it comprises at least one plate (2) having a substantially rectangular blank.

18. cowling according to one of the preceding device claims, characterized in that it comprises a plurality of juxtaposed plates (2) which are interconnected by the injection molding material.

19. cowling according to one of the preceding device claims, characterized in that a plurality of juxtaposed plates (2) are connected to one another with substantially rectangular blank by means of injection molding material.

20. cowling according to one of the preceding device claims, characterized in that an edge-side thickening (10) is arranged circumferentially around the cowling part (1).

21. cowling according to one of the preceding device claims, characterized in that the at least one plate (2) comprises a LWRT (Low Weight Reinforced Thermoplastics) material.

22. cowling according to one of the preceding device claims, characterized in that the at least one plate (2) comprises a core layer (3) with at least one thermoplastic and reinforcing fibers contained therein, preferably glass fibers.

23. cowling according to one of the preceding device claims, characterized in that the at least one plate (2) comprises a core layer (3) with therein contained polypropylene or polyamide.

24. cowling according to one of the preceding device claims, characterized in that on both sides of a core layer (3) of a plate (2) at least one cover layer (4, 5) is arranged.

25 cowl according to one of the preceding device claims, characterized in that a cover layer (4) as a cover fleece, preferably made of PET (polyethylene terephthalate) with textile fibers contained therein, is formed.

26 cowl according to one of the preceding device claims, characterized in that a cover layer (5) as a film, preferably made of polypropylene, is formed.

27. cowling according to one of the device claims 15-23, characterized in that the at least one plate (2) has only a single layer.

28. cowling according to one of the preceding device claims, characterized in that at least two plates (2) contain core layers (3) with mutually different materials, in particular polypropylene on the one hand and polyamide on the other.

29. cowling according to one of the preceding device claims, characterized in that the outer contour of the molded thickening (10) does not match the outer contour of the at least one plate (2).

30. cowling according to one of the preceding device claims, characterized in that it is designed as an underbody cowl or Radlaufschale.