DE10025369B4 - Composite trim and manufacturing process - Google Patents

Abstract

Composite trim for the decorative interior of vehicles, with
- A first decorative element (1), which has a first decorative visible surface (5) on the front and a rear surface (20), and
A second decorative part element (2) which has a second decorative visible surface (6) on the front, which is designed differently from the first decorative visible surface (5), and has a recessed joining surface (19) adjacent to it on the front,
- Wherein the decorative visible surfaces (5, 6) of the two trim elements (1, 2) are juxtaposed along a butt joint (7), and
- The joining surface (19) of the second decorative part element (2) and the rear surface (20) of the first decorative part element (1) are at least partially overlapping and form a connecting area between them, in which the two decorative part elements (1, 2) by means of an adhesive layer ( 8) are firmly connected to each other, such
- That the two decorative visible surfaces (5, 6) on the butt joint (7) flush with each other or with a defined ...

Description

technical area

The invention relates to a composite trim part, for the decorative interior of vehicles, and a process for Production of a composite trim part.

In motor vehicles, but also in Rail, air and water vehicles become decorative trim parts used. There is an increasing trend in the automotive industry in particular Trend to upgrade the design of the vehicle interior with high-quality decorative parts, for example in the form of panels, strips and covers, e.g. fine wood, Have aluminum, chrome or carbon surfaces. A typical one Real wood trim consists of a carrier, e.g. made of aluminum or Plastic, intermediate veneer layers applied to it, e.g. made of beech wood, and a precious wood veneer arranged on it. The precious wood veneer is typically achieved by applying several layers of clear lacquer sealed.

In addition to such real wood trim plastic trim or metal trim, for example used. Plastic trim parts are, for example, with a decorative Chrome coating or covered with a decorative film. Furthermore, decorative part surfaces can also printed or embossed his.

It was, for example, with older vehicles also known to combine solid wooden strips with chrome-plated metal strips, the metal bar was screwed to the wooden bar. In order to the result is a composite trim that has two decorative surfaces together combined. Such a composite trim part from previous vehicles however shows great clearances and striking transition dividing lines from the chrome-plated strip to the solid wood part. different Manufacturing tolerances between the chrome strip and the wooden strip could not be balanced. Such a composite trim part is therefore sufficient no longer the high levels set by the automotive industry today Requirements for an optically perfect surface from Decorative parts that also have a pleasant feel when you touch them.

Furthermore, from the DE 81 25 242 U1 a decorative and ram protection strip for motor vehicles is known, in which two different parts, namely a strip, and a retroreflective element are attached to one another, so that the retroreflective element sits in a recessed area of the strip.

From the DE 86 11 436 U1 an additional profile part for motor vehicle bodies is also described. This additional profile part is made of plastic and is glued to the body, the adhesive being introduced into grooves which are present in the profile parts. In addition, a double-sided adhesive tape is arranged on the plastic profile parts and a groove separates the double-sided adhesive tape from the grooves into which the adhesive is applied in order to prevent the adhesive from coming into contact with the adhesive tape.

Furthermore, from the DE 198 11 792 A1 described a method for the detachable fastening of trim parts with tolerance compensation on beams with mounting grids, and a product produced by this method. A holding bolt is inserted into the mounting grid of a carrier after it has been connected to a holding bush. Then glue is applied to the back of the retaining bolts and a covering part is glued to this back. In this case, tolerance compensation with respect to the carrier takes place by adapting the position of the holding bolts with respect to the position of the holding bushes before the adhesive hardens.

The invention therefore has the technical problem based, a composite trim and a method for manufacturing specify a composite trim that combines two different decorative visible surfaces realized with a visually and haptically flawless transition.

According to the invention, this technical problem is solved by one Composite trim part with the features of claim 1 and Manufacturing process with the features of claim 12 or of claim 13 solved.

The composite trim part according to the invention consists of a first trim element, which has a first decorative visible surface on the front and a rear surface. Furthermore, the composite decorative part comprises a second decorative part element which has a second decorative visible surface on the front, which is designed differently from the visible surface of the first decorative part element. The second trim element has a recessed joining surface adjacent to its decorative visible surface on the front. The decorative visible surfaces of the two trim elements are juxtaposed along a butt joint. The joining surface of the second decorative part element and the rear surface of the first decorative part element are arranged overlapping at least in regions and form a connecting region between them. In the connection area, the two decorative part elements are firmly connected to one another by means of an adhesive layer. The two decorative visible surfaces on the butt joint are either arranged flush with one another or, alternatively, the two decorative visible surfaces are arranged on the butt joint with a defined height offset from one another. Depending on the actual The thickness of the first decorative part, which is subject to a manufacturing tolerance, results in a different space in the connection area between the rear surface of the first decorative part element and the joining surface of the second decorative part element, which is compensated for by the thickness of the adhesive layer.

In the composite trim part according to the invention, one receives visually and haptically flawless transition between the two Trim elements and thus between the two different decorative Visible surfaces. The transition at the butt joint is precisely defined and is subject to extremely little Tolerance variations. The target transition can optionally be flush be defined or in the form of a small, defined height offset be interpreted. Because in practice it is sometimes desirable from the outset the one trim element in a defined manner via the to let adjacent trim element protrude, since then the minor Tolerance fluctuations in production in the visual appearance practically imperceptible impact.

According to the present invention form the first trim element and / or the second trim element at least one cavity in or adjacent to the connection area to absorb excess glue the adhesive layer. In this way, excess glue is defined in the one or more cavities dissipated. The cavities thus act as overflow chambers. The best The design and arrangement of the cavities depends on the chosen geometry of the two trim elements. The cavities can be in shape, for example of holes, depressions, grooves, grooves or the like his.

In a favorable embodiment the invention is the butt joint of the two joined together decorative visible surfaces flush executed and has a maximum tolerance-related height offset of ± 0.3 mm on.

In another advantageous embodiment is the defined height offset designed so that the decorative visible surface of the second trim element the decorative visible surface of the first trim element protrudes. Preferably the defined one height offset at the butt joint of the two joined together decorative visible surfaces from a range of 0.2-0.5 mm selected. The selected from this area Setpoint for the defined height offset then shows, for example, only a tolerance-related deviation of ± 0.2 mm on. In a corresponding manner, the defined height offset can, if necessary be designed the other way around, so that the visible surface of the first trim element over the visible surface of the second trim element protrudes.

It is convenient if the butt edges of the two trim elements, as seen from the visible surface, between them an angle of 3 ° to Include 20 °. By This measure a particularly close butt joint can be achieved.

For example, when the first trim element is a precious wood trim, as was explained at the beginning, the thickness of this trim element is subject to inevitable tolerance fluctuations. These tolerance fluctuations result from the fact that the precious wood veneer is a natural product. But it also bears in particular Layers of lacquer applied to the precious wood veneer to inevitable Tolerance fluctuations in. The first trim element is now according to the invention always in a defined transition situation - either flush or with a minor defined height offset - at the butt joint attached to the second trim element. The inevitable tolerance deviations the first trim element, if it is about the real wood trim explained above acts through a variable thickness of the adhesive layer in the connection area between the back surface of the first trim element and the joining surface of the second trim element balanced. Therefor a sufficient amount of adhesive is placed in this space. The adhesive layer preferably consists of a 1-component adhesive or a 2-component adhesive. In addition to these known to those skilled in the art Adhesive systems, the specific choice of which material surfaces from the depends on the two trim elements in the connection area, of course, too other suitable adhesives can be used.

The glue becomes so sufficient Quantity and arrangement in the connection area of the two trim elements introduced that the depending on the actual Thickness of the first decorative part element is sufficient filled out to establish the required firm connection and at the same time to ensure the thickness compensation in the space. Excess glue can e.g. escape laterally from the space. However, it is not essential required that the entire space with Filled in glue is.

The two trim elements, the together result in the composite trim, can in principle in various Be structured and designed in a way. It can be the most different decorative visible surfaces combine in a composite trim. This results in an enormous Plenty of new design options for trim parts.

In a preferred embodiment, the first decorative visible surface of the first trim element consists of a decorative layer. The decorative layer is preferably designed as a veneer layer, textile layer or film layer. However, it can also be designed in any other way. Preferred layers of veneer consist of real wood, in particular precious wood, paper, cork or natural stone. The decorative layers can also be printed or with a surface embossing to be seen. Furthermore, the decorative surface can also be processed in another way. The decorative layer is preferably provided with an at least partially transparent coating. The coating, which can also be colored, for example, can consist of a lacquer layer, a layer applied, for example, by injection molding, or a film layer.

In a further embodiment the first trim element has at least one carrier layer, the back is firmly connected to the decorative layer. The at least one backing layer consists preferably of metal, wood or plastic. As before with conventional Precious wood trim can here several carrier layers made of different materials, such as a metal support with additional layers of blind veneer made of wood.

The second trim element consists in a cheap embodiments made of metal, plastic or wood. In particular, the second trim element provided with a decorative surface coating be, such as a chrome coating or the like. As before mentioned, can both the first and the second trim element any desired Have structure.

A first method according to the invention will now be described described for the production of a composite trim part. It will be a first trim element with a desired first decorative visible surface as well a second trim element with a desired second decorative visible surface manufactured. The production takes place so that the two trim elements geometrically to form a continuous visible surface along a butt joint put together to let. Furthermore, the production takes place so that the second trim element and the first trim element at least in regions when joining form a connection area. After making the two Decorative parts, the first decorative part element is placed in a Joining device. The joining device has a contact surface on that of the surface contour of the later Composite trim corresponds. The first trim element is with its visible surface to the contact surface the joining device created. Then an adhesive layer is applied to the back connecting surface of the first trim part and / or the front connecting surface of the second trim element applied. Then the second is created Decorative element in the joining device. The second trim element is with its visible surface to the contact surface the joining device, in such a way that the second trim element along a butt joint on the first trim element is applied. Now there are holding forces on the first trim element and joining forces on the second trim element applied to the two visible surfaces of the two trim elements separately to the contact surface the joining device to press and also to press the two trim elements together on the butt joint. Under Maintaining the holding and joining forces is allowed Adhesive layer in the joining device react or harden. Due to the thickness between the two connecting surfaces Adhesive layer are the thickness tolerances of the first Trim element balanced.

The tolerances of the second trim element come in terms of precision the transition of the two decorative visible surfaces at the butt joint not to wear because the first trim element in the joining device always in a fixed relation to the visible surface of the second trim element is created. Due to the defined predetermined contour of the contact surface of the joining device becomes flush as needed surface specified or a defined height offset specified. In the event of a defined height offset this offset is formed in the contact surface of the joining device. In the method according to the invention the two trim elements independently of one another in the joining device pressed against the contact surface, so that the desired defined transition at the butt joint for the latter continuous visible surface always guaranteed is.

A second method according to the invention distinguishes differs from the previously described method in that the two trim elements in the manner described with their decorative visible surfaces to the contact surface the joining device be created. The adhesive is now through at least one through opening in the second trim element in the connection area between the rear interface of the first trim element and the front connecting surface of the introduced second trim part. Again, the holding and joining forces in the described manner applied and then allowed to leave the adhesive layer in the Joining device under Reacting while maintaining the holding and joining forces or harden.

In the embodiment of the In both process variants, excess glue becomes into an overflow cavity initiated in the first and / or second trim element.

In one embodiment of the two Process variants are the holding forces on the first trim element at least partially through at least one opening in the second trim element applied through. So can both trim part elements separately from each other in a sufficient manner to the contact surface the joining device pressed , although the second trim element is the first trim element overlaps at least in some areas on its back.

The following are exemplary embodiments of the Invention described with reference to the accompanying drawings. It shows:

1 a schematic section through a joining device and a first embodiment of the composite decorative part according to the invention joined therein;

2 a schematic section through a second embodiment of the composite trim according to the invention;

3 is a schematic plan view of a further embodiment of a decorative part element, which forms a component of the composite decorative part.

description of embodiments the invention

1 shows a joining device 3 with a contact surface 4 , At this contact area 4 is a first trim element 1 with its visible surface 5 created. Furthermore is on the contact surface 4 a second trim element 2 with its visible surface 6 created. The two strip-shaped trim elements 1 . 2 are butt to butt along a butt joint 7 joined. In the contact area 4 the joining device 3 is a slightly defined height offset in the area of the butt joint 7 educated.

The second trim element 2 overlaps the back of the first trim element 1 in a connection area. In this connection area are the two trim elements 1 . 2 through an adhesive layer 8th , for example from a polyurethane adhesive, in a space 18 connected.

The joining device 3 includes bolt-shaped tensioners 15 , with the holding forces in the direction of the arrow on the first trim element 1 are applied (several similar clamping devices 15 are one behind the other along the strip-shaped trim element 2 intended). For this purpose, the second trim element has openings 17 through which the jigs 15 can reach through. The joining device further comprises 3 sleeve-shaped clamping devices 16 that the bolt-shaped jigs 15 embrace. The jigs 15 and 16 can be acted upon independently of each other. The sleeve-shaped jigs 16 bring joining forces in the direction of the arrow onto the second trim element 2 on. Due to the geometry of the two trim elements 1 . 2 in this case it is ensured that the two elements 1 . 2 due to the applied holding and joining forces against both the contact surface 4 be pressed, as well as on the butt joint 7 pressed against each other. In other geometrical conditions, further clamping devices can also be present if required.

The first trim 1 in the example consists of a strip-shaped aluminum carrier 9 , two layers of beech wood veneer on top 10 . 11 , with a precious wood veneer 12 and a final lacquer coating 13 , The layers 9 to 12 are glued and pressed together. The second trim 2 in the example consists of a plastic strip on the visible surface 6 is chrome coated.

To produce the composite trim part, the two trim element elements described are first described 1 and 2 manufactured. The trim 1 shows due to its layer structure and in particular due to its multi-layer coating 13 for each decorative part produced, a slightly different thickness dimension within a somewhat larger tolerance range. First, the first trim element 1 with its visible surface 5 into the joining device 3 inserted. Then there is an adhesive layer on its back 8th applied. Then the second trim element 2 with its visible surface 6 into the joining device 3 inserted. The two trim elements 1 . 2 are through the jigs 15 . 16 in contact with the contact surface 4 excited so that a defined transition at the butt joint 7 is ensured. This is due to the contact area 4 defined predefined.

The glue 8th resembles the different sized space 18 which is characterized by the different thickness dimensions of each trim element manufactured 1 results, since the visible surfaces 5 and 6 of the two trim elements 1 . 2 always in the same reference to each other in the joining device 3 issue. As in 1 to see the second trim element 2 in the example an overflow cavity 14 on, in the excess glue 8th can dodge. After the adhesive has reacted 8th the finished composite trim is in the joining device 1 . 2 before, despite the different thickness of trim elements 1 the desired transition at the butt joint between the two decorative visible surfaces 5 and 6 having.

2 shows a second embodiment of the composite trim part, which in principle the finished composite trim part of 1 equivalent. Same or corresponding parts in the 1 to 3 are provided with the same reference numerals. It can be seen that the two abutting edges on the butt joint 7 form an angle to each other.

3 shows channel-shaped depressions 21 that in the joint surface 19 another example of a trim member 2 are trained. These depressions serve to absorb excess adhesive during the joining process.

Claims (14)

Composite trim for the decorative interior of vehicles, with - a first trim element ( 1 ), the first decorative visible surface ( 5 ) on the front and a back surface ( 20 ), and - a second trim element ( 2 ), which has a second decorative visible surface on the front ( 6 ), which are different from the first decorative sight area ( 5 ), and adjacent to it on the front is a recessed joining surface ( 19 ), - whereby the decorative visible surfaces ( 5 . 6 ) of the two trim elements ( 1 . 2 ) side by side along a butt joint ( 7 ) are joined together, and - the joint surface ( 19 ) of the second trim element ( 2 ) and the back surface ( 20 ) of the first trim element ( 1 ) are at least partially overlapping and form a connecting area between them, in which the two trim elements ( 1 . 2 ) using an adhesive layer ( 8th ) are firmly connected to one another in such a way that - the two decorative visible surfaces ( 5 . 6 ) at the butt joint ( 7 ) are arranged flush with each other or with a defined height offset, and which, depending on the tolerance-related thickness of the first trim element ( 1 ), in the connection area between the back surface ( 20 ) of the first trim element ( 1 ) and joining surface ( 19 ) of the second trim element ( 2 ) resulting space ( 18 ) by the thickness of the adhesive layer ( 8th ) is balanced, whereby - the first trim element ( 1 ) and / or the second trim element ( 2 ) at least one cavity in or adjacent to the connection area ( 14 ) for absorbing excess adhesive from the adhesive layer ( 8th ) trains. Composite trim part according to claim 1, characterized in that the flush butt joint ( 7 ) of the two decorative surfaces that are joined together ( 5 . 6 ) has a maximum tolerance-related height offset of ± 0.3 mm. Composite trim part according to claim 1, characterized in that the defined height offset is designed such that the decorative visible surface ( 6 ) of the second trim element ( 2 ) over the decorative visible surface ( 5 ) of the first trim element ( 1 ) protrudes. Composite trim part according to claim 1 or 3, characterized in that the nominal value of the defined height offset at the butt joint ( 7 ) of the two decorative surfaces that are joined together ( 5 . 6 ) is selected from a range of 0.2 - 0.5 mm. Composite trim part according to claim 1, characterized in that the abutting edges on the butt joint ( 7 ) of the two trim elements ( 1 . 2 ), from the visible surface ( 5 . 6 ) seen from, enclose an angle of 3 ° to 20 ° between them. Composite trim part according to claim 1, characterized in that the adhesive layer ( 8th ) consists of a 1-component adhesive or a 2-component adhesive. Composite trim part according to claim 1, characterized in that the first decorative visible surface ( 5 ) of the first trim element ( 1 ) from a decorative layer ( 12 ), preferably with at least partially transparent coating ( 13 ), consists. Composite trim part according to claim 7, characterized in that the decorative layer ( 12 ) is designed as a veneer layer, preferably made of real wood, paper or natural stone, as a textile layer or as a film layer. Composite decorative part according to claim 7 or 8, characterized in that the first decorative part element ( 1 ) at least one carrier layer ( 9 ), preferably made of metal, wood or plastic, which is fixed on the back with the decorative layer ( 12 ) connected is. Composite decorative part according to claim 1, characterized in that the second decorative part element ( 2 ) consists of metal, plastic or wood. Composite trim part according to claim 10, characterized in that this second trim element with a decorative surface coating is provided. Method for producing a composite decorative part with the following steps: - producing a first decorative part element ( 1 ) with a desired first decorative visible surface ( 5 ) and manufacture of a second trim element ( 2 ) with a second desired decorative visible surface ( 6 ), such that the two trim elements ( 1 . 2 ) geometrically to form a continuous visible surface ( 5 . 6 ) along a butt joint ( 7 ), so that the second trim element ( 2 ) and the first trim element ( 1 ) a connection area at least in some areas ( 19 . 20 ) train; - Creation of the first visible surface ( 5 ) of the first trim element ( 1 ) to the contact surface ( 4 ) a joining device ( 3 ) which corresponds to the surface contour of the composite trim ( 1 . 2 ) corresponds to; - application of an adhesive layer ( 8th ) on the rear connection surface ( 20 ) of the first trim element ( 1 ) and / or the front connection surface ( 19 ) of the second trim element ( 2 ); - Creation of the second visible surface ( 6 ) of the second trim element ( 2 ) to the contact surface ( 4 ) of the joining device ( 3 ) with simultaneous contact with the first trim element ( 1 ) along the butt joint ( 7 ); - application of holding forces ( 15 ) on the first trim element ( 1 ) and the application of joining forces ( 16 ) on the second trim element ( 2 ), for pressing the two visible surfaces separately ( 5 . 6 ) to the contact surface ( 4 ) of the joining device ( 3 ) and to press the two trim elements together ( 1 . 2 ) at the butt joint ( 7 ), in which - excess adhesive of the adhesive layer ( 8th ) in an overflow cavity ( 14 ; 21 ) is introduced in the first (1) and / or second (2) trim element; - Reaction or hardening of the adhesive layer ( 8th ) in the joining device ( 3 ) while maintaining the holding forces ( 15 ) and joining forces ( 16 ), whereby between the two connecting surfaces ( 19 . 20 ) adjusting thickness ( 18 ) the adhesive layer ( 8th ) the thickness tolerances of the first trim element ( 1 ) are balanced. Method for producing a composite decorative part with the following steps: - producing a first decorative part element ( 1 ) with a desired first decorative visible surface ( 5 ) and manufacture of a second trim element ( 2 ) with a second desired decorative visible surface ( 6 ), such that the two trim elements ( 1 . 2 ) geometrically to form a continuous visible surface ( 5 . 6 ) along a butt joint ( 7 ), so that the second trim element ( 2 ) and the first trim element ( 1 ) a connection area at least in some areas ( 19 . 20 ) and the second trim element ( 2 ) at least one through opening in this connection area ( 17 ) having; - Creation of the first visible surface ( 5 ) of the first trim element ( 1 ) to the contact surface ( 4 ) a joining device ( 3 ) which corresponds to the surface contour of the later composite trim ( 1 . 2 ) corresponds to; - Creation of the second visible surface ( 6 ) of the second trim element ( 2 ) to the contact surface ( 4 ) of the joining device ( 3 ) with simultaneous contact with the first trim element ( 1 ) along the butt joint ( 7 ); - application of an adhesive layer ( 8th ) in the connection area between the rear connection surface ( 20 ) of the first trim element ( 1 ) and the front connection surface ( 19 ) of the second trim element ( 2 ) through the at least one through opening ( 17 ) in the second trim element ( 2 ) through; - application of holding forces ( 15 ) on the first trim element ( 1 ) and the application of joining forces ( 16 ) on the second trim element ( 2 ), for pressing the two visible surfaces separately ( 5 . 6 ) to the contact surface ( 4 ) of the joining device ( 3 ) and to press the two trim elements together ( 1 . 2 ) at the butt joint ( 7 ), excess adhesive of the adhesive layer ( 8th ) in an overflow cavity ( 14 ; 21 ) is introduced in the first (1) and / or second (2) trim element; - Reaction or hardening of the adhesive layer ( 8th ) in the joining device ( 3 ) while maintaining the holding forces ( 15 ) and joining forces ( 16 ), whereby the thickness (between the two connecting surfaces) 18 ) the adhesive layer ( 8th ) the thickness tolerances of the first trim element ( 1 ) are balanced. Method according to claim 12 or 13, characterized in that the holding forces ( 15 ) on the first trim element ( 1 ) at least partially through at least one opening ( 17 ) in the second trim element ( 2 ) are applied through.