EP2525956A1

EP2525956A1 - Method for producing an inner lining part

Info

Publication number: EP2525956A1
Application number: EP11701748A
Authority: EP
Inventors: Ante Vasilj; Frederik Bois; Pierre-Olivier Moraes; Bernhard Baumann
Original assignee: Faurecia Innenraum Systeme GmbH
Current assignee: Faurecia Innenraum Systeme GmbH
Priority date: 2010-01-19
Filing date: 2011-01-19
Publication date: 2012-11-28
Also published as: JP5766211B2; DE102010005009A1; WO2011088995A1; JP2013517163A; US20120286444A1; US9493124B2

Abstract

The invention relates to a method for producing an inner lining part, having a special injection-moulding process and a selective foam-backing process.

Description

Method for producing an interior trim part

The invention relates to a method for producing an interior trim part, in particular for the interior of vehicles.

Dressing sectionSteering sectionSuitwear sectionStripping sectionStripes sectionStripes sectionOut of

EP 1 995 034 A2 discloses an injection method and a molding method for producing molded parts.

The object of the present invention is to provide a method by means of which the costs for the production of interior trim parts with a seemingly higher quality design can be reduced.

The above object is achieved by a method having the features of the independent claims. Further embodiments are given in the dependent on these dependent claims.

The method according to the invention for producing an interior trim part has in particular the following steps: optionally inserting a foil into a first mold part, wherein the foil extends at least over a cover region of the first mold part,

Attaching the film in the first mold part,

Closing the mold with at least one second mold part,

Performing the injection molding operation in the volume between the film and the at least second molding tool part to produce a first one

Cowling section, Removing the first trim portion and combining with a second trim portion, and selectively backfoaming the second trim portion.

In particular, according to the inventive method for producing an interior trim part, in particular the implementation of the following steps is provided:

Placing a film (20) on a first contouring surface (36) of a first mold part (32) and fixing the film (20) on the first mold part (32),

Fixing the film (20) to the first mold part (32),

Arranging a second mold part (34) with a second contouring surface (37) on the first mold part (32) to form a closed position to each other, wherein the second contouring surface (37) is formed such that these at least in their planar extent at least partially over the first contouring surface (36) of the first mold part (32) extends and at a closed position of the mold parts (32, 34) the first and the second contouring

Surface (36, 37) together form a cavity (39) located between them for receiving material to be injected for at least partially injecting the film (20),

Carrying out the injection molding process in the cavity (39) between the film (20) and the at least second molding tool part (32) for producing a first lining part section (12) made of film and

Curing the carrier part and removing it with the film (20) connected thereto as the first lining part section (12),

Arranging a second trim part section (14) with a partially provided as a visible side outer side (14 a) and one opposite to this located rear side (14b) such that the trim part section (14) forms on the outside (14a) a first exposed visible side section (15) and a connection section (16) in contact with a connecting section (26) of the foil (29) in sections, between the rear side (14b) of the second trim part section (14) and the first trim part section (12), a cavity (H2) for at least

is formed in sections, foaming back and connecting the first and the second trim part section (12,14), and partially backfoaming and connecting the first and the second trim part section (12, 14).

According to one embodiment of the method according to the invention it can be provided that no application of a film takes place. In this case, the further step without foil but with the same measures.

According to one embodiment of the method according to the invention, it is further provided that the film with cutouts and / or at least one

Line of weakness is provided, which corresponds to at least one elevation or depression in the contouring surface of at least one of the mold parts in the mold inserted in the mold, and that in a process step, the area in which forms at least a portion of the elevation or the depression is removed to form an opening in the interior trim part to be manufactured

For the production of interior trim parts, a first trim part section is generally produced as an injection molded part in a first step in an injection molding process and, in a second step, this first trim part section is combined with a second trim part section. The injection molded part may be made of a polypropylene material. When using such a method for the instrument panels of motor vehicles, the injection molded part is used so to speak as a support for the instrument panel, while the second

Trim part has a visually and haptically appealing material and at least a portion of this support in the form of the first Covering part of the section covers. Thus, for example, the second trim part section the border of display elements for speed,

Train speed or consumption. The first interior trim part, which has a support part and a foil at least partially covering or laminating it, is located in an area which is further in the interior of the occupant area or seating area in the interior of the vehicle in the case of an instrument panel between the first

Interior trim section and the junction of the front

Windshield on the body or the second

Interior trim portion, and the second interior trim portion located at least in the area that is slightly closer to the occupants. As a result, on the one hand, the carrier element can be made of a material suitable for stability, on the other hand, the film must be used only for the area that remains particularly visible to the driver of a motor vehicle after installation. This creates a total of considerable and haptic in the

Access area of the occupants pleasant interior trim part. The outside of the first interior trim part, in particular with the film, can be included

corresponding film in particular be designed little reflective and dull, so that the driver's view of the motor vehicle is not limited by reflections. Since the film may be arranged to shine in the visible hard area (particularly the grained area of an interior trim part and is reflective due to the usual and low cost manufacturing processes) past the windshield, ie "hidden" so that the use of PP GF - or LGF material types is possible, which leads to a better stability of the support member and a further reduction of costs.

An inventive method therefore has essentially two main steps. In a first step, a special injection molding process is performed, while in the second step, a selective foam back is performed. The injection molding process is specific in that it does not produce a simple injection-molded part, as is done in known methods, but rather, a film is fixed in the injection-mold before the injection molding process. This foil is optimized to be at least later on for the occupants a motor vehicle visible side has a matte surface compared to the bare injection molding material and is particularly non-reflective. In addition, this film has an improved contact behavior in terms of its feel. This improved contact behavior relates, for example, to the contact resistance, the contact temperature or the surface condition.

In summary, it can therefore be said that the inserted film improves both the appearance and the feel of the first trim part section produced by the injection molding process on the visible side after its subsequent installation, for example as an instrument panel. It is essential that the injection molding process is carried out such that already defined when inserting the film in the first mold part, which side of the film is later on the visible side. This is ensured by the fact that the film is back-injected exclusively, so only the volume between the film and the second mold part is filled with injection molding material.

After completion of the injection molding process so there is a first

Cladding section as semi-finished or in other words intermediate product available, which has a support part of injection molding material and an existing at least in some areas cover part in the form of the film. In this case, the subregions, ie the covering regions, over which the film is stretched, in particular those regions which are visible to the occupants of such a motor vehicle in combination with the second trim part section after installation, for example as an instrument panel in a motor vehicle.

In the second step of the method according to the invention, a selective

Foaming the second trim part section. In this case, the first and the second trim part section is advantageously combined in such a way that the second trim part section just covers those areas which are not covered by the film. In order to obtain particularly clean transitions, it may be advantageous if areas with the film and with the second

Covering portion covered areas of the first trim part section overlap, so that even at the interfaces no clear view of the

Lower material of the injection molded part is made possible.

The selective foaming of the second trim part section is advantageously carried out through the first trim part section. In this case, openings are provided in the first trim part section, for example, through which selective backfoaming can take place. Target of the selective

Foaming is to improve the feel of the second panel section for the user. The foam backing makes it possible for the second

Trim part section gets a very soft feel. The combination of the two steps according to the invention thus produces an optimized interior trim part, both in terms of appearance and in terms of feel, which has optimizations both with regard to the first trim part section and with respect to the second trim part section. In the synopsis of the two improved individual steps, the overall result for the user is improved

Interior trim part, without the two individual steps of the interior trim part on the visible side are to be considered. Rather, the entire interior trim part for the occupants of a motor vehicle in optical and haptic terms has a high quality.

An inventive method can be further developed to the effect that the film has a haptically and / or optically optimized surface at least on the first side facing the first mold part. The haptic

Optimization means that when the user touches the surface, a valuable feeling or a high-quality impression is created. This valence relates in particular to the material quality, which should differ significantly from classic smooth plastic. It can be formed, for example, by an improved contact temperature lower or higher surface roughness or the surface resistance characteristic. By "optical optimization" is meant, for example, a surface which produces a matt or a mirror-free visual impression. Such a matte surface has, in addition to its high-quality impression on the user, the further advantage that it reflects outside sunlight into the area of the driver avoids and thus additionally increases the security in the management of a motor vehicle.

It may further be advantageous if, in a method according to the invention, in the step of selective backfoaming through the first trim part section, foaming is effected in a gap between the first trim part section and the second trim part section. In this way, so to speak, the first panel section at the same time forms the boundary of the selective Hinterschäumraums. In order to ensure that the back-foaming material also has sufficient adhesion to the first trim part section, it can be advantageous if, in particular, the area which is not covered with the foil is flamed before the foam-backing. In this way, the surface of the first trim part section is changed by the flaming, so that the Hinterschäummaterial adhere better. At this point, the impairment of the surface of the film by flaming is irrelevant, since at this point by the overlap with the second trim section no visibility for the occupants of a motor vehicle, in which a correspondingly manufactured

Instrument panel is installed, prevails. However, for flaming, a mask or stencil must be used to protect the area that will later be visible in the vehicle from degradation by flaming. By selectively backfoaming in a gap, the further advantage is that relatively little backfoaming material has to be used. In this respect, it is sufficient to use the minimal required Hinterschäummenge for the desired feel, which is the pressure of the user on the second

Trim part portion supported against the first trim part section. Without this gap to the first panel section and a corresponding foam backing foam material would have to be foamed in much larger volumes, which would bring in addition to a Hinterschäumzeitaufwand also an additional cost of the other material with it.

It may be a further advantage if the film is pressed against the first mold part by the injection molding process, so that at least the surface of the first side of the film facing this mold part is plastically deformed. On In this way, the method according to the invention is further optimized with regard to the injection molding step. The final surface of the film on the visible side is thus produced only by injection molding. The surface generation is an integral part of the step of the injection molding process. By the by the

Injection molding process constructed pressure on the back, so the second side of the film, just this film is sufficiently strong pressed into the first mold part, so that there existing negative surface pattern is imprinted into the surface of the first side of the film. This surface can be designed differently. For example, it is possible to adapt the surface structure of scarred leather, so that in addition to a matte and glare-free appearance, the film also radiates a high visual quality. Other high-quality surface structures, such as brushed metal, carbon structures or other technical structures are possible here.

To ensure that the film is as easy as possible to demold and is pressed as cleanly as possible in the lower mold part during the injection molding process, so to speak, as little wrinkling of the film prevails, it may be advantageous if the plastic deformation is generated by a first mold part, the negative Surface texture depth between 10% and 30% is greater than the positive surface texture depth of the first trim part section to be generated. When using film thicknesses of 0.2 mm to 0.7 mm, there is a risk that the desired surface structure on the visible side of the first

Panel section is not produced in high quality by the injection molding process. In order to ensure that the surface structure, in particular with regard to the surface texture depth, such as, for example, the grain depth, has the desired quality and sharpness, the negative surface structure must be correspondingly coarser. It has surprisingly been found that in film thicknesses of 0.2 mm to 0.7 mm magnification of the negative surface structure of the first mold part by 10% to 30% compensates for the film and a

high quality surface image results. In other words, according to the invention, 110% to 130% of the desired positive surface texture depth of the first

Cover section for the negative surface texture depth of the first

Mold tool part used, Thus, on the one hand, the exclusion of the injection molded parts, ie the first trim part sections, minimized and beyond the achievable appearance of the surface of the film further improved.

It can be advantageous if the materials PP-GF or PP-LGF are used in a method according to the invention for the injection molding process. PPGF stands for glass fiber reinforced polypropylene with normal or short glass fibers (</ = 5 mm), while PP LGF stands for propylene with long fiber glass fibers (> 5 mm). The use of glass fiber reinforced polypropylene for the first trim part section by injection molding is only possible by a method according to the invention. Such materials are very unsightly in appearance and perceived by a user as inferior. At the same time, however, they achieve high stability with regard to mechanical loads with relatively little use of material. However, since optical inferiority has a very great influence on the appreciation and quality evaluation by the user, especially when used in the automotive industry, such a material could not be used hitherto. Only by using a method according to the invention, it becomes possible to use this more stable material and thus to produce a higher stability with less material use and also to improve the high quality material appearance for the occupants of a motor vehicle.

Furthermore, it can be advantageous if the film has a layer of TPO at least on the first side, which faces the first mold part. Under TPO is to be understood a thermoplastic, in particular a thermoplastic based on olefin. The use of thermoplastics has the advantage that when performing the injection molding process by the necessary for the injection molding process

Injection material energy is introduced in the form of heat in the mold parts. In addition to the fact that the injection molding material displaces volume and thus presses the film against the lower mold part, can be carried out at least in partial areas a partial melting or softening of the film on the introduced energy and the thermoplastic design of the film. This softening facilitates the plastic deformation of the film surface to produce a Structure surface on the visible side of the film. After completion of the

Injection molding process, especially after cooling of the injection molding material, also cools the mold and the film surface. The surface structure of the film indirectly produced by the injection molding process also cools down and remains fixed for the temperature ranges during use and at least plastically unchangeable.

To ensure that the film remains in a defined position during the injection molding process, it may be advantageous if the film is fixed in the first mold part before the mold is closed. In such a fixation is essential that on the one hand binds the film sufficiently strong to a place, on the other hand leaves enough space that the film can move to the final position. This final position is defined by the lower mold part into which the inserted film is moved, in particular pressed, by the injection molding material flowing in during the injection molding process. In the event that the fixation is too strong, there is a risk that the film stretches and thus different film thicknesses arise or that the film even breaks, which would lead to the Committee of the resulting first trim section.

The fixation in the inventive method can for the films in

done differently. For example, it is possible to carry out the fixing agents in the form of adhesive or cohesive adhesives. Such adhesives are particularly useful when it comes to complex geometries and the film must be fixed at a variety of locations. Preferably, the fixing by means of an adhesive is designed such that the adhesive after completion of the injection molding process readily from the first

Fairing section, in particular of the film can be removed. It is also advantageous if the adhesives are arranged so that they

Surface structure of the film during the injection molding process does not hinder.

Alternatively to the use of adhesives or in addition, it may be advantageous if fixing means are provided in the form of clamping means. Such Clamping means may be, for example, mechanical pins or brackets for fixing the position of the film. Mechanical pins can correspond, for example, with recesses or holes in the film, while clips on the edge of the film can clamp them. It is crucial that neither the holes nor the brackets affect the final shape of the first trim section and the surface structure of the film. It may be advantageous if the fixing means are arranged in the form of clamping means outside the visible areas after the manufacture of the interior trim part. In particular, overlapping of the foil is possible, with the clamping means being arranged in the overlapping areas in order to be able to possibly remove damage from the clamping means together with these areas later. Also, a fixation by means of negative pressure is possible, wherein the fixing means are provided as suction holes for the film, which define the film in a defined position.

In order to adapt the film even better, it may be advantageous if the film is provided with cutouts which correspond to elevations or depressions in at least one of the mold parts when the film is inserted into the mold.

For example, fixtures or openings for loudspeakers or ventilation ducts are often provided in the area in which the interior trim part can be used, on instrument panels of motor vehicles. In particular, the ventilation fan for the front windshield usually has openings in just this area. Advantageously, these openings are provided in the form of recesses or elevations in the two mold parts, so that in these areas either only very thin, designed as predetermined breaking points material bridges remain or these areas are not ejected. Advantageously, the film is provided in these areas with similar cutouts, which brings the further advantage that in the provision of

Elevations in the mold part and corresponding cutouts in the film, this survey may additionally have the function of a fixing agent for the film.

In order to further optimize the injection molding process, it can be advantageous if air ducts are provided in the first mold part to be able to move in the volume create a negative pressure between the film and the first mold part. This has the advantage that the drape when making the first

Trim part section is further minimized or even completely prevented. During the injection molding process, ie during the flow of liquid injection molding material into the volume between the film and the second

Mold part, while the volume between the first mold part and film is slowly evacuated via the air channels. The applied negative pressure due to the evacuation supports the movement of the film in the direction of this first

Mold part. The first film is thus sucked by the negative pressure on the one hand against the first mold part, and on the other hand pressed from the back by inflowing injection molding material against the first side. In this way, you can work with lower injection molding pressures and, moreover, the resulting result is of higher quality. It is also possible in this way to produce higher deformation pressures between the film and the first mold part and thus to allow a better and more accurate plastic deformation of the upper side of the film.

Another object of the present invention is a device for

Implementation of a method according to the invention. Such a device has corresponding elements for the necessary steps. In particular, an injection mold with at least two mold parts is necessary and a second device for carrying out the selective Schäumschritts.

In a device according to the invention, in particular the first mold part is designed such that radii are provided exclusively greater than or equal to 0.5 mm. The provision of exclusively such large radii has the advantage that, on the one hand, the demolding of the first trim part section from the first mold part becomes easier, and on the other hand, the risk of wrinkling during the injection molding process with respect to the film is reduced.

Likewise subject of the present application is an interior trim part produced by a method according to the present invention. The invention will be described in more detail with reference to the accompanying drawing figures. The terms "bottom", "top", "left" and "right" refer to an alignment of the figures with normally readable numerals. Showing:

Fig. 1 is a perspective view of an embodiment of a

inventive manufacturing device having a first and a second mold part.

Fig. 2 is a sectional view of another embodiment of the first mold part of the manufacturing device according to the invention with

Representation of a first step of the method according to the invention, wherein a section along the line 2-2 of Figure 1 of a similar manufacturing apparatus is shown,

Fig. 3 is a sectional view of the first mold part in the

Embodiment according to Figure 2 and an embodiment of the second mold part of the manufacturing device according to the invention in an analogous manner along the line 2-2 of Figure 1 showing a further substep of a method according to the invention,

4 shows the first and the second mold part of the manufacturing device according to the invention in the embodiments and the sectional view of Figure 3 showing a further part step of

inventive method,

5 shows the first and the second mold part of the manufacturing device according to the invention in the embodiments and the sectional view of Figure 3 showing a further substep of

inventive method,

6 is a sectional view of the first and the second mold part of the manufacturing device according to the invention in an analogous manner along the line 2-2 of Figure 1 showing a further substep of the method according to the invention, FIG. 7 shows a partial step cladding section removed from the molds, FIG.

8 is a further processed first trim part section,

9 shows an embodiment of an interior trim part.,

10 shows an embodiment of an interior trim part according to the invention,

Fig. 11 shows an alternative embodiment of a device according to the invention

Procedural step, and

12 shows a further step to the method according to FIG. 11.

Fig. 1 shows a part of a first embodiment of the invention

Manufacturing apparatus 50. For the first step of the method, this apparatus 50 comprises a mold or mold 30 consisting of two part molds or mold parts 32 and 34. In this case, the second mold part 34 is exemplified as an upper mold part and the first mold part 32 is exemplified as a lower mold part. The lower mold part 32 may in particular be fastened on a tool fastening device and thus be arranged fixed.

The lower mold part 32 has in particular a first contouring

Surface 36, which is designed in particular such that their shape is to be described in three dimensions in their planar extension. In particular, the contouring surface 36 of the lower mold part 32 optionally has at least one elevation and / or depression, with which or with which corresponding complementary partial shapes of the component to be produced are to be formed. To further illustrate the invention, a local, along the generally curved longitudinal extent L or main direction of the mold displaceable coordinate system with a depth direction TR and a longitudinal direction LR is entered as a coordinate axes in the figure. This depth direction TR and one

Longitudinal direction LR as coordinate axes can be applied ebenaos for the produced interior trim part, the shape of which at least in the

Figure representation shown general form of the manufacturing device corresponds. FIGS. 2 to 5 show a section through the respective mold parts 32, 34 transversely and in particular vertically to the longitudinal direction L or LR.

The mold parts 32 and 34 of the mold 30 according to the embodiment in Fig. 1 serve to form an instrument panel for a motor vehicle. In this case, the mold 30 shows only a part of the trim part section to be created, or

Interior paneling for the instrument panel. This part is in particular the area which later comes to rest on the abutting edge between instrument panel and front windshield. This area is just the one that should be covered with a foil.

The lower first mold part 32 is formed with two projections 40 having a substantially oval cross-section. The first mold part 32 shown in FIG. 2 has two depressions 40 which correspond to the depressions shown in FIG. 1 and of which only one recess 40 is shown due to the sectional view. With these recesses 40 are formed during the injection molding complementary shaped elevations in the produced injection-molded part or the inner lining part to be produced. The first contouring surface 36 of the first mold part 32 may alternatively or additionally, in particular at least one elevation having a complementary shaped recess in

formed to be produced injection molded part or the interior trim part to be produced. Loudspeakers will later be placed in these holes. Fig. 1 shows the mold 30 in an exploded view. For the injection molding process, the second mold 34 is placed on the first mold 32 and the mold 30 is closed.

A possibility of a method according to the invention with regard to the first injection molding step will be explained with reference to the following figures.

Fig. 2 shows the first mold part 32, still open, so without a second

Mold tool part 34. In this first mold part 32, a film 20 is inserted. The first mold part 32 in this case has a recess 40, which with

Elevations on the injection-molded part to be produced corresponds or generates these. When inserting the film 20 into the first mold part 32, care must be taken that the film 20 covers all the cover areas 36. Next is to be noted the film 20 has a protrusion beyond the first mold part 32 on all areas. This is not necessary with every method, but advantageous. Subsequently, the film 20 is fixed in the first mold part 32, so that they can no longer weaWlich move with respect to their relative position to the first mold part 32. The only freedom of movement remains a movement of the film 20 in the direction of the mold part 32, that is to say an application of the film 20 to the first mold part 32.

Fig. 3 shows the next step in this method. After inserted film 20, a second mold part 34 is prepared, which is placed on the first mold part 32 with inserted film 20. During the Aufsetzvorgangs can be seen in Fig. 3 already that the second mold part 34 material channels 35 for the

Hinterspritzvorgang the film 20 has. The first mold part 32 and the second mold part 34 are closed and thus together form the entire mold 30.

In Fig. 4, the mold 30 is shown in the closed state. The first mold part 32 and the second mold part 34 are closed and substantially resting on each other in their edge regions. However, the bearing surfaces are separated in the cover region 36 by the interposed foil 20. Im

closed state of the mold 30 can be clearly seen that the film 20 on both sides of the mold 30 has a projection 24, which over the mold 30th

look out. In this way it can also be seen optically that the film completely covers the necessary covering area within the mold 30. The film 20 is still fixed within the mold 30 but free to move toward the first mold part 32.

Fig. 5 shows the beginning of the injection molding process. Through the material channel 35, material 60 is passed through the second mold part 34. At two openings in the volume between the film 20 and the second mold part 34 material 60 exits. The exiting material 60 is subject to a certain injection molding pressure, which, depending on the process and the desired process speed,

Process temperature and choice of materials may vary. Subsequent to the situation illustrated in FIG. 5, more and more liquid material 60 flows out of the openings of the material channels 35 of the second mold part 34 and fills the volume between the film 20 and the mold part 34 more and more.

The end of this injection molding process is shown in FIG. Here, the volume between the film 20 and mold part 34 is completely filled with material. Also, the material channel 35 is still filled with material 60. It can also be seen that the film 20 has been completely applied by the pressure of the inflowing material 60 to the lower mold part 32, in particular, the recess 40 has filled. The first mold part 32 has, with the cover region with the film 20, a surface structure which forms a surface structure by plastic deformation on the film 20. After cooling the entire system, the two mold parts can be removed 32 and 34, the

Panel section 12 are demoulded, so to speak.

FIG. 7 shows the first trim part section 12 in the demoulded state. This is cooled injection-molded material 60, which is completely covered by the film 20 on the side visible in FIG. 7 as the underside. The film 20 still has the projections 24 which, as can be seen in FIG. 6, have overhanged the mold 30. Here an optional post-processing step can take place. This optional post-processing step serves to remove the projections 24 along the dashed lines shown in FIG. 7, for example to cut them off. The result of this optional post-processing step is a trim portion 12, as shown in FIG.

FIGS. 9 and 10 each show an interior trim part 10, FIG. 9 a

10 shows a further embodiment of the interior trim part according to the invention with a film 20. It can be seen that FIG. 10 shows an interior trim part 10 with fundamentally similar configurations as in FIG. 9, but the first trim part section 12 in FIG Fig. 10 is visible only on the film 20. The structure, and the material of the first trim part section 12 is invisible to the user from the visible side S. To the invisibility even further to improve, the second trim part section 14 is so to the first

Fitted trim portion 12 pushed so that the film 20 intersects with the second trim part section 14, so to speak. This overlap causes an occupant of a motor vehicle to see exclusively the second trim part section 14 and the film 20 from the visible side S forth. In the known interior trim parts 10, as shown in Fig. 9, for the occupant of a motor vehicle from the visible side S, the second trim part section 14 and the raw material of the first trim part section 12 was visible.

FIG. 10 shows a second step in a method according to the invention, specifically the selective backfoaming of the second trim part section. In this case, rear foam material is introduced into the region between the first trim part section and the second trim part section. This

Hinterschäummaterial serves to fill the volume, however, to maintain a certain elasticity to produce a pleasant, in particular a soft and high-quality feel when pressure on the second trim part section 14. This is achieved by a Hinterschäummaterial, which forms an elastic under use conditions foam.

The second trim part section 14 has an outer side 14a provided in sections as a visible side and an opposite thereto

Rear 14b on. Likewise, the first trim part section 12 has a partially provided as a visible side outer side 12a and opposite to this located back 12b. The trim part sections 12, 14 are in a corresponding embodiment of the tool 30 and the

contour-forming surfaces formed and arranged such that the second

Covering portion 14 on the outside 14a a first exposed

Visible side portion 15 and located with a terminal portion 26 of the film 20 in contact terminal portion 16 is formed and partially between the back 14b of the second panel section 14 and the first panel section 12 a cavity H2 for at least partially backfolding and joining the first and the second panel section 12, 14 is formed. The preferably provided Hinterschäumrichtung HR goes toward the connection region 16, 26 of the trim part sections 12, 14th

In the embodiment according to FIG. 10, the first trim part 12 has a plane extending transversely to the longitudinal direction L and / or depth TR

Cross-section formed step shape, which extends in the depth direction and vice versa. The step depth is in this case formed by the connecting portion 26 of the film and the corresponding section of the first covering section 12 lying underneath it. This results in a substantially uniform contour without any special or small (i.e., in particular less than 2 mm) steps between the

Visible side portion 25 of the first trim part section 12 and the

Visible side portion 15 of the second panel section 14 possible. A transition line 27 is also defined on the foil and a transition line 17 on the second trim part 14.

FIGS. 11 and 12 show an alternative method with regard to the injection molding step. In this case, the first mold part 32 additionally air channels 33, which open into the volume between the film 20 and the first mold part 32. The film 20 is doing on its first side 22, which later to the visible side of the S

Interior trim part 10 shows, almost sucked. In FIG. 12, it is easy to see how the suction system sucks the film 20 against the first mold part 32 even before the volume has been completely filled between the film 20 and the second mold part 34. In this way, a wrinkle-free application of the film 20 is ensured at the first mold part 32 and at the same time, the material 60 through the material channels 35 of the second mold part 34 can be introduced much slower and, above all, with lower pressure. REFERENCE NUMBERS

10 interior trim part

12 first trim part section

14 second trim part section 0 film

22 first page

24 supernatant

30 form

32 first mold part

33 air channels

34 second mold part

35 material channel

36 coverage area

38 fixative

40 survey / immersion

50 device

60 injection molding material

H Hinterschäumrichtung

S visible side

Claims

A method of manufacturing an interior trim part (10), comprising the following steps:

Fixing the film (20) to the first mold part (32),

Arranging a second trim part (14) with an outer side (14a) provided as a visible side and a rear side (14b) opposite thereto, such that the trim part (14) has a first exposed visible side part (15) on the outer side (14a) a connection section (16) which is in contact with a connection section (26) of the film (20d) and forms a cavity (H2) in sections between the rear side (14b) of the second covering section (14) and the first covering section (12) for at least

2. The method according to claim 1, characterized in that the film (20) at least on the first mold part (32) facing first side (22) has a haptically and / or optically optimized surface.

3. The method according to any one of the preceding claims, characterized

characterized in that in the step of selectively foaming through the first trim part (12), a gap is foamed in between the first trim part (12) and the second trim part (13).

4. The method according to any one of the preceding claims, characterized

in that the film (20) is pressed against the first mold part (32) by the injection molding process so that at least the surface of the first side (22) facing said mold part (32) is plastically deformed.

5. The method according to claim 4, characterized in that the plastic deformation is generated by a first mold part (32) whose negative surface texture depth is between 10% and 30% greater than the positive surface texture depth of the first trim part section (12) to be generated.

6. The method according to any one of the preceding claims, characterized in that PP GF or PP LGF is used for the injection molding process.

7. The method according to any one of the preceding claims, characterized in that the film (20) at least on the first side (22) which faces the first mold part (32) has a layer of TPO.

8. The method according to any one of the preceding claims, characterized in that the film (20) in the first mold part (32) is fixed before the mold (30) is closed.

9. The method according to claim 8, characterized in that the fixing takes place by means of fixing means (38) in the form of adhesives and / or cohesive adhesives.

10. The method according to claim 8, characterized in that the fixing takes place by means of fixing means (38) in the form of clamping means.

11. The method according to any one of the preceding claims, characterized in that the film (20) is provided with cutouts and / or at least one line of weakness, in the in the mold (30) inserted film (20) with at least one elevation or depression in the contouring surface (39) at least one of the mold parts (32, 34) corresponds, and that in a Process step, the area in which forms at least a portion of the elevation or the depression is removed to an opening in the produced

Form interior trim part.

12. The method according to any one of the preceding claims, characterized

in that air channels (33) are provided in the first mold part (32) in order to generate a negative pressure in the volume between the film (20) and the first mold part (32).

13. Device (50) for carrying out a method having the features of one of claims 1 to 12.

14. Device (50) according to claim 13, characterized in that at least the first mold part (32) has radii greater than or equal to 0.5 mm.

Interior trim part (10) produced by a method having the features of claims 1 to 12.