WO2008125566A1 - Steering wheel comprising foam cladding and method for producing a steering wheel - Google Patents
Steering wheel comprising foam cladding and method for producing a steering wheel Download PDFInfo
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- WO2008125566A1 WO2008125566A1 PCT/EP2008/054289 EP2008054289W WO2008125566A1 WO 2008125566 A1 WO2008125566 A1 WO 2008125566A1 EP 2008054289 W EP2008054289 W EP 2008054289W WO 2008125566 A1 WO2008125566 A1 WO 2008125566A1
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- Prior art keywords
- steering wheel
- foam
- soft
- cover layer
- leather
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/04—Hand wheels
- B62D1/06—Rims, e.g. with heating means; Rim covers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/08—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles using several expanding or moulding steps
- B29C44/083—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another
- B29C44/086—Increasing the size of the cavity after a first part has foamed, e.g. substituting one mould part with another and feeding more material into the enlarged cavity
Definitions
- the invention relates to a steering wheel according to the preamble of claim 1 and a method for producing a steering wheel according to the preamble of claim 9.
- Steering wheels consist of a steering wheel skeleton as a supporting metal structure, which is enveloped, with the envelope predominantly PUR foams are used, which ensure the functional, geometric, visual and tactile properties of the steering wheel.
- PUR foams are used, which ensure the functional, geometric, visual and tactile properties of the steering wheel.
- These polyurethane foams must meet certain surface finish requirements, which are typically described in specifications, to meet the life cycle requirements of the steering wheel.
- One of the points required there is the surface hardness, which determines the abrasion resistance.
- the wrapping is formed in most cases in one operation by foaming or in leather steering wheels, a cover made of leather is additionally applied to the foam.
- a steering wheel with a steering wheel rim, steering wheel spokes and a steering wheel trim is known, wherein the steering wheel rim has a steering wheel skeleton and a skeleton casing enclosing the steering wheel skeleton, and wherein between this and the steering wheel trim a soft layer is provided.
- a soft layer is provided between this and the steering wheel trim.
- the disadvantage of this steering wheel structure is that it is only for Steering wheels makes sense where the steering wheel cover is made of leather. If the steering wheel cover is made of plastic, it would be useful to apply this plastic panel in a further injection molding step, since this plastic layer must be hard. In this case, then three injection molding operations would be required, so that the production cost would be considerable.
- the invention has for its object, with less effort on the one hand to achieve a desired softness of the steering wheel rim and on the other hand, the required surface hardness of the steering wheel cover.
- the foam according to the invention consists at least at selected portions of the steering wheel of a soft dimensionally stable foam material, which is surrounded by a harder cover layer, wherein the contact surfaces of the soft foam material and the harder cover layer to prevent Twisting of both layers against each other have geometric structures.
- both regular geometric structures such as cylinders, pyramids, grooves or furrows and irregular geometric structures, such as. a rough eroding structure may be provided or pores may be used on the surface of the soft foam material as irregular geometric structures.
- the harder top layer preferably consists of a design-giving
- the soft, dimensionally stable foam material has a Shore L hardness of 10 to 20 and the harder topcoat has a Shore L Hardness of 40 to 60.
- this cover layer is at least partially covered with leather in a variant.
- a method for producing a lining for a steering wheel according to the invention is characterized in that the steering wheel skeleton is covered in a first foam mold with a soft, dimensionally stable foam material, and that the prefoamed steering wheel is foamed after the reaction time in a second foam mold with a harder cover layer or with a leather covering is provided.
- the geometric structure of the contact surface of the soft foam material with the cover layer to be applied in the second foam mold is applied to the inner wall of the first foam mold.
- the top layer can be omitted with a leather steering wheel, but also the harder top layer can be covered with leather.
- FIG. 1 shows a cross section through a partially foam-wrapped steering wheel rim.
- FIG. 2 shows a cross section through a completely foam-wrapped steering wheel rim.
- FIG. 3 shows a cross section through a partially foam-wrapped steering wheel rim with leather lining
- Fig. 4 shows a cross section through a fully foamed steering wheel rim
- FIG. 5 shows the detail E of FIG. 2.
- FIG. 1 In the cross section of a steering wheel rim shown in FIG. 1 is a
- Steering wheel skeleton 1 which has a hook-shaped cross-sectional shape.
- the steering wheel skeleton 1 is partially soft in a first foaming mold dimensionally stable foam 2 been provided.
- This foam is preferably made of a 2-component foam material.
- the steering wheel rim now has a soft inner core. Since this core material does not meet the requirements of the regulations for the outer material, it must be coated with a second component.
- the prefoamed steering wheel is inserted into a second foam mold. There, the steering wheel is provided with a second design-giving foam layer 3, which has the hardness required in the regulations. Since the steering wheel skeleton has not been completely provided with the soft foam, the foam layer 3 reaches at the point marked 4 as far as the steering wheel skeleton.
- a steering wheel with a cross-sectionally U-shaped steering wheel skeleton 5 is provided. This is completely provided in a first foaming mold with a soft, dimensionally stable foam 6. As can be seen from the detail of FIG. 5, the surface of the foam casing 6 has teeth 7, which are achieved by the correspondingly designed inner surface of the first foam mold. An identical or similar rough surface is also provided in the other embodiments. After the reaction, this prefoamed steering wheel is inserted into a second foaming mold and provided with a second design-giving foam layer 8.
- a steering wheel skeleton 9 which has a hook-shaped cross-sectional shape, partially provided with a soft foam layer 10 on which a design-giving harder foam layer 1 1 has been applied by the method previously described.
- the foam layer 1 1 is partially covered with a leather layer 12.
- this leather layer 12 can also be applied directly to the soft foam layer 10.
- the leather layer 10 is preferably adhered to the respective foam layer.
- a steering wheel with a cross-sectionally U-shaped steering wheel skeleton 13 is shown again.
- This is completely provided with a soft, dimensionally stable foam 14, on which a design-giving foam layer 15 is applied.
- the entire foam layer 15 is covered with a leather layer 16.
- the leather layer 16 can be applied directly to the soft foam 14.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering Controls (AREA)
Abstract
The invention relates to a steering wheel comprising foam cladding, which is applied to a skeleton steering wheel structure. In order to achieve particularly a desired level of softness for the steering wheel rim and the necessary surface hardness of the steering wheel trim, the foam cladding (2, 6, 10, 14) is made of a soft, dimensionally stable foam material, at least in select sections of the steering wheel, the material being surrounded by a harder cover layer (3, 8) or a leather sheathing (12, 16). A method for producing a trim for a steering wheel is characterized according to the invention in that the skeleton steering wheel structure is covered with a soft, dimensionally stable foam material in a first foaming mold, and that, after expiration of the reaction time, the steering wheel pre-coated with foam is covered with a harder cover layer in a second foaming mold or provided with a leather sheathing.
Description
Lenkrad mit Umschäumung und Verfahren zur Herstellung eines Lenkrades Steering wheel with foam surround and method for producing a steering wheel
Beschreibungdescription
Die Erfindung betrifft ein Lenkrad nach dem Oberbegriff des Anspruchs 1 und ein Verfahren zur Herstellung eines Lenkrades nach dem Oberbegriff des Anspruchs 9.The invention relates to a steering wheel according to the preamble of claim 1 and a method for producing a steering wheel according to the preamble of claim 9.
Lenkräder bestehen aus einem Lenkradskelett als tragende Metallstruktur, die umhüllt ist, wobei zur Umhüllung vorwiegend PUR-Schäume verwendet werden, die die funktionalen, geometrischen, optischen und haptischen Eigenschaften des Lenkrades gewährleisten. Diese PUR-Schäume müssen, um die Anforderungen an das Lenkrad auf Lebensdauer zu erfüllen, bestimmten Anforderungen an die Oberflächengüte entsprechen, die in der Regel in Spezifikationen beschrieben sind. Einer der dort geforderten Punkte ist die Oberflächenhärte, die maßgeblich die Abriebfestigkeit bestimmt. Die Umhüllung wird in den meisten Fällen in einem Vorgang durch Schäumen geformt oder bei Lederlenkrädern wird zusätzlich auf den Schaum eine Verkleidung aus Leder aufgebracht.Steering wheels consist of a steering wheel skeleton as a supporting metal structure, which is enveloped, with the envelope predominantly PUR foams are used, which ensure the functional, geometric, visual and tactile properties of the steering wheel. These polyurethane foams must meet certain surface finish requirements, which are typically described in specifications, to meet the life cycle requirements of the steering wheel. One of the points required there is the surface hardness, which determines the abrasion resistance. The wrapping is formed in most cases in one operation by foaming or in leather steering wheels, a cover made of leather is additionally applied to the foam.
Aus der EP 0 446 394 A1 ist ein Verfahren zur Herstellung von Lenkrädern bekannt, bei dem in einem ersten Arbeitsgang auf das Lenkradskelett ein Kern aus einem offenporigen geschäumten Kunststoffmaterial und danach auf das so vorbereitete Lenkrad in einem zweiten Arbeitsgang in einer Sollmaße aufweisenden Form eine Sichtummantelung aus ungeschäumtem Kunststoff aufgebracht wird. Dieses zweistufige Verfahren soll gewährleisten, dass die Sichtummantelung frei von Blasen, Schlieren und Unregelmäßigkeiten ist.From EP 0 446 394 A1 a method for the production of steering wheels is known, in which in a first operation on the steering wheel skeleton a core of an open-celled foamed plastic material and then on the thus prepared steering wheel in a second operation in a desired dimensions having form a vision enclosure is applied from unfoamed plastic. This two-stage process is designed to ensure that the vision coating is free of bubbles, streaks and irregularities.
Weiterhin ist aus der DE 100 36 069 A1 ein Lenkrad mit einem Lenkradkranz, Lenkradspeichen und einer Lenkradverkleidung bekannt, wobei der Lenkradkranz ein Lenkradskelett und eine das Lenkradskelett umhüllende Skelettummantelung aufweist, und wobei zwischen dieser und der Lenkradverkleidung eine weiche Schicht vorgesehen ist. Durch diese weiche Schicht soll ein Lenkrad mit weichem Griffgefühl erzielt werden. Der Nachteil dieses Lenkradaufbaus besteht darin, dass er nur für
Lenkräder sinnvoll ist, bei denen die Lenkradverkleidung aus Leder besteht. Sofern die Lenkradverkleidung aus Kunststoff besteht, wäre es sinnvoll, diese Kunststoffverkleidung in einem weiteren Spritzgussschritt aufzubringen, da diese Kunststoffschicht hart sein muss. In diesem Fall wären dann drei Spritzgussvorgänge erforderlich, so dass der Herstellungsaufwand beträchtlich wäre.Furthermore, from DE 100 36 069 A1 a steering wheel with a steering wheel rim, steering wheel spokes and a steering wheel trim is known, wherein the steering wheel rim has a steering wheel skeleton and a skeleton casing enclosing the steering wheel skeleton, and wherein between this and the steering wheel trim a soft layer is provided. Through this soft layer, a steering wheel with a soft feel is to be achieved. The disadvantage of this steering wheel structure is that it is only for Steering wheels makes sense where the steering wheel cover is made of leather. If the steering wheel cover is made of plastic, it would be useful to apply this plastic panel in a further injection molding step, since this plastic layer must be hard. In this case, then three injection molding operations would be required, so that the production cost would be considerable.
Der Erfindung liegt die Aufgabe zugrunde, mit geringerem Aufwand einerseits eine gewünschte Weichheit des Lenkradkranzes und andererseits die geforderte Oberflächenhärte der Lenkradverkleidung zu erzielen.The invention has for its object, with less effort on the one hand to achieve a desired softness of the steering wheel rim and on the other hand, the required surface hardness of the steering wheel cover.
Erfindungsgemäß wird das durch einen Lenkradaufbau gemäß Anspruch 1 und durch ein Verfahren zur Herstellung eines Lenkrades gemäß Anspruch 9 erreicht.According to the invention this is achieved by a steering wheel assembly according to claim 1 and by a method for producing a steering wheel according to claim 9.
Bei einem Lenkrad mit Umschäumung, die auf ein Lenkradskelett aufgebracht ist, besteht die Umschäumung erfindungsgemäß zumindest an ausgewählten Abschnitten des Lenkrades aus einem weichen formbeständigen Schaummaterial, das von einer härteren Deckschicht umgeben ist, wobei die Berührungsflächen des weichen Schaummaterials und der härteren Deckschicht zur Verhinderung einer Verdrehung beider Schichten gegeneinander geometrische Strukturen aufweisen.In a steering wheel with foam, which is applied to a steering wheel skeleton, the foam according to the invention consists at least at selected portions of the steering wheel of a soft dimensionally stable foam material, which is surrounded by a harder cover layer, wherein the contact surfaces of the soft foam material and the harder cover layer to prevent Twisting of both layers against each other have geometric structures.
Dabei können sowohl regelmäßige geometrische Strukturen wie Zylinder, Pyramiden, Nuten oder Furchen als auch unregelmäßige geometrische Strukturen, wie z.B. eine grobe Erodierstruktur vorgesehen sein oder Poren an der Oberfläche des weichen Schaummaterials als unregelmäßige geometrische Strukturen verwendet werden.In this case, both regular geometric structures such as cylinders, pyramids, grooves or furrows and irregular geometric structures, such as. a rough eroding structure may be provided or pores may be used on the surface of the soft foam material as irregular geometric structures.
Infolge dieser geometrischen Strukturen ist zwischen den beiden Schichten eine ausreichende Reibung vorhanden, die eine Verdrehung der Schichten gegeneinander verhindert.As a result of these geometric structures, a sufficient friction is present between the two layers, which prevents a rotation of the layers against each other.
Durch diesen Aufbau des Lenkrades werden mit geringerem Aufwand eine gewünschte weiche Haptik und die erforderliche Härte der Oberfläche des Lenkrades erreicht.By this construction of the steering wheel a desired soft feel and the required hardness of the surface of the steering wheel can be achieved with less effort.
Die härtere Deckschicht besteht vorzugsweise aus einem designgebendenThe harder top layer preferably consists of a design-giving
Schaumstoff, wie er bei Lenkrädern des Standes der Technik bereits verwendet wird. Dabei weist das weiche formbeständige Schaummaterial eine Shore L-Härte von 10 bis
20 und die härtere Deckschicht eine Shore L Härte von 40 bis 60 auf. Obwohl bei Lenkrädern mit einer Lederumhüllung die härtere Deckschicht entfallen kann, ist diese Deckschicht bei einer Variante zumindest teilweise noch mit Leder abgedeckt.Foam, as it is already used in steering wheels of the prior art. The soft, dimensionally stable foam material has a Shore L hardness of 10 to 20 and the harder topcoat has a Shore L Hardness of 40 to 60. Although in steering wheels with a leather covering the harder top layer can be omitted, this cover layer is at least partially covered with leather in a variant.
Ein Verfahren zur Herstellung einer Verkleidung für ein Lenkrad ist erfindungsgemäß dadurch gekennzeichnet, dass das Lenkradskelett in einer ersten Schäumform mit einem weichen formbeständigen Schaummaterial bedeckt wird, und dass das vorgeschäumte Lenkrad nach Ablauf der Reaktionszeit in einer zweiten Schäumform mit einer härteren Deckschicht überschäumt wird oder mit einer Lederverkleidung versehen wird.A method for producing a lining for a steering wheel according to the invention is characterized in that the steering wheel skeleton is covered in a first foam mold with a soft, dimensionally stable foam material, and that the prefoamed steering wheel is foamed after the reaction time in a second foam mold with a harder cover layer or with a leather covering is provided.
Es ist zweckmäßig, dass auf die Innenwand der ersten Schäumform die geometrische Struktur der Berührungsfläche des weichen Schaummaterials mit der in der zweiten Schaumform aufzubringenden Deckschicht aufgebracht wird. Obwohl die Deckschicht bei einem Lederlenkrad entfallen kann, kann aber auch die härtere Deckschicht mit Leder überzogen werden.It is expedient that the geometric structure of the contact surface of the soft foam material with the cover layer to be applied in the second foam mold is applied to the inner wall of the first foam mold. Although the top layer can be omitted with a leather steering wheel, but also the harder top layer can be covered with leather.
Die Erfindung soll in Ausführungsbeispielen anhand von Zeichnungen erläutert werden. Es zeigen:The invention will be explained in exemplary embodiments with reference to drawings. Show it:
Fig. 1 einen Querschnitt durch einen partiell umschäumten Lenkradkranz;1 shows a cross section through a partially foam-wrapped steering wheel rim.
Fig. 2 einen Querschnitt durch einen vollständig umschäumten Lenkradkranz;2 shows a cross section through a completely foam-wrapped steering wheel rim.
Fig. 3 einen Querschnitt durch einen partiell umschäumten Lenkradkranz mit Belederung;3 shows a cross section through a partially foam-wrapped steering wheel rim with leather lining;
Fig. 4 einen Querschnitt durch einen vollständig umschäumten Lenkradkranz mitFig. 4 shows a cross section through a fully foamed steering wheel rim
Belederung;leather trim;
Fig. 5 die Einzelheit E aus Fig. 2.5 shows the detail E of FIG. 2.
Bei dem in der Fig. 1 dargestellten Querschnitt eines Lenkradkranzes ist einIn the cross section of a steering wheel rim shown in FIG. 1 is a
Lenkradskelett 1 , vorgesehen, das eine hakenförmige Querschnittsform aufweist. Das Lenkradskelett 1 ist in einer ersten Schäumform partiell mit einer weichen
formbeständigen Umschäumung 2 versehen worden. Diese Umschäumung besteht vorzugsweise aus einem 2-Komponenten Schaummaterial. Nach der Ausreaktion des Materials hat der Lenkradkranz nunmehr einen weichen inneren Kern erhalten. Da dieses Kernmaterial nicht den Anforderungen gemäß den Vorschriften an das Außenmaterial entspricht, muss es mit einer zweiten Komponente überzogen werden. Zur Herstellung eines kompletten Schaumlenkrades wird das vorgeschäumte Lenkrad in eine zweite Schäumform eingelegt. Dort wird das Lenkrad mit einer zweiten designgebenden Schaumschicht 3 versehen, die die in den Vorschriften geforderte Härte aufweist. Da das Lenkradskelett nicht vollständig mit der weichen Umschäumung versehen worden ist, reicht die Schaumschicht 3 an der mit 4 gekennzeichneten Stelle bis an das Lenkradskelett heran.Steering wheel skeleton 1, provided, which has a hook-shaped cross-sectional shape. The steering wheel skeleton 1 is partially soft in a first foaming mold dimensionally stable foam 2 been provided. This foam is preferably made of a 2-component foam material. After the reaction of the material, the steering wheel rim now has a soft inner core. Since this core material does not meet the requirements of the regulations for the outer material, it must be coated with a second component. To produce a complete foam steering wheel, the prefoamed steering wheel is inserted into a second foam mold. There, the steering wheel is provided with a second design-giving foam layer 3, which has the hardness required in the regulations. Since the steering wheel skeleton has not been completely provided with the soft foam, the foam layer 3 reaches at the point marked 4 as far as the steering wheel skeleton.
Bei der Ausführungsform der Fig. 2 ist ein Lenkrad mit einem im Querschnitt U-förmigen Lenkradskelett 5 vorgesehen. Dieses wird in einer ersten Schäumform vollständig mit einer weichen formbeständigen Umschäumung 6 versehen. Wie aus der Einzelheit der Fig. 5 ersichtlich ist, weist die Oberfläche der Umschäumung 6 Zähne 7 auf, die durch die entsprechend ausgestaltete Innenfläche der ersten Schäumform erzielt werden. Eine gleiche oder ähnliche rauhe Oberfläche ist auch bei den anderen Ausführungsformen vorgesehen. Nach der Ausreaktion wird auch dieses vorgeschäumte Lenkrad in eine zweite Schäumform eingelegt und mit einer zweiten designgebenden Schaumschicht 8 versehen.In the embodiment of Fig. 2, a steering wheel with a cross-sectionally U-shaped steering wheel skeleton 5 is provided. This is completely provided in a first foaming mold with a soft, dimensionally stable foam 6. As can be seen from the detail of FIG. 5, the surface of the foam casing 6 has teeth 7, which are achieved by the correspondingly designed inner surface of the first foam mold. An identical or similar rough surface is also provided in the other embodiments. After the reaction, this prefoamed steering wheel is inserted into a second foaming mold and provided with a second design-giving foam layer 8.
Bei der Ausführungsform der Fig. 3 ist ein Lenkradskelett 9, das eine hakenförmige Querschnittsform aufweist, partiell mit einer weichen Schaumschicht 10 versehen, auf der eine designgebende härtere Schaumschicht 1 1 nach dem vorher beschriebenen Verfahren aufgebracht worden ist. Zusätzlich ist die Schaumschicht 1 1 partiell noch mit einer Lederschicht 12 überzogen. Je nach Anforderung kann diese Lederschicht 12 auch direkt auf die weiche Schaumschicht 10 aufgebracht werden. Die Lederschicht 10 wird vorzugsweise auf die jeweilige Schaumschicht aufgeklebt.In the embodiment of Fig. 3, a steering wheel skeleton 9, which has a hook-shaped cross-sectional shape, partially provided with a soft foam layer 10 on which a design-giving harder foam layer 1 1 has been applied by the method previously described. In addition, the foam layer 1 1 is partially covered with a leather layer 12. Depending on the requirements, this leather layer 12 can also be applied directly to the soft foam layer 10. The leather layer 10 is preferably adhered to the respective foam layer.
Bei der Ausführungsform der Fig. 4 ist wieder ein Lenkrad mit einem im Querschnitt U- förmigen Lenkradskelett 13 dargestellt. Dieses ist vollständig mit einer weichen formbeständigen Umschäumung 14 versehen, auf der eine designgebende Schaumschicht 15 aufgebracht ist. Zusätzlich ist bei dieser Ausführungsform die gesamte Schaumschicht 15 mit einer Lederschicht 16 überzogen. Auch bei dieser
Ausführungsform kann die Lederschicht 16 direkt auf die weiche Umschäumung 14 aufgebracht werden.
In the embodiment of Fig. 4, a steering wheel with a cross-sectionally U-shaped steering wheel skeleton 13 is shown again. This is completely provided with a soft, dimensionally stable foam 14, on which a design-giving foam layer 15 is applied. In addition, in this embodiment, the entire foam layer 15 is covered with a leather layer 16. Also with this Embodiment, the leather layer 16 can be applied directly to the soft foam 14.
Claims
1. Lenkrad mit Umschäumung, die auf ein Lenkradskelett aufgebracht ist, dadurch gekennzeichnet, dass die Umschäumung (2, 6, 10, 14) zumindest an ausgewählten Abschnitten des Lenkrades aus einem weichen formbeständigen1. steering wheel with foam, which is applied to a steering wheel skeleton, characterized in that the foam casing (2, 6, 10, 14) at least at selected portions of the steering wheel of a soft dimensionally stable
Schaummaterial besteht, und dass dieses von einer härteren Deckschicht (3, 8) umgeben ist. , wobei die Berührungsflächen des weichen Schaummaterials (2, 6, 10, 14) und der härteren Deckschicht (3, 8, 1 1 , 15) zur Verhinderung einer Verdrehung beider Schichten gegeneinander geometrische Strukturen (7) aufweisen.Foam material is, and that this is surrounded by a harder cover layer (3, 8). , wherein the contact surfaces of the soft foam material (2, 6, 10, 14) and the harder cover layer (3, 8, 1 1, 15) for preventing rotation of both layers against each other geometric structures (7).
2. Lenkrad nach Anspruch 1 , dadurch gekennzeichnet, dass unregelmäßige geometrische Strukturen vorgesehen sind.2. Steering wheel according to claim 1, characterized in that irregular geometric structures are provided.
3. Lenkrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass eine grobe Erodierstruktur vorgesehen ist.3. Steering wheel according to claim 1 or 2, characterized in that a coarse erosion structure is provided.
4. Lenkrad nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass Poren an der Oberfläche des weichen Schaummaterials als unregelmäßige geometrische Strukturen verwendet werden.4. Steering wheel according to claim 1 or 2, characterized in that pores are used on the surface of the soft foam material as irregular geometric structures.
5. Lenkrad nach Anspruch 1 , dadurch gekennzeichnet, dass regelmäßige geometrische Strukturen (7) vorgesehen sind5. Steering wheel according to claim 1, characterized in that regular geometric structures (7) are provided
6. Lenkrad nach Anspruch 5, dadurch gekennzeichnet, dass als regelmäßige geometrische Strukturen Zylinder Pyramiden Nuten oder Furchen (7) vorgesehen sind. 6. Steering wheel according to claim 5, characterized in that as regular geometric structures cylinder pyramid grooves or furrows (7) are provided.
7. Lenkrad nach mindestens einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die härtere Deckschicht (3, 8) aus einem designgebenden Schaumstoff besteht.7. Steering wheel according to at least one of the preceding claims, characterized in that the harder cover layer (3, 8) consists of a design-giving foam.
8. Lenkrad nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die härtere Deckschicht (1 1 , 15) zumindest teilweise mit Leder (12, 16) abgedeckt ist.8. Steering wheel according to at least one of the preceding claims, characterized in that the harder cover layer (1 1, 15) is at least partially covered with leather (12, 16).
9. Verfahren zur Herstellung einer Verkleidung für ein Lenkrad, insbesondere nach den vorhergehenden Ansprüchen, dadurch gekennzeichnet, dass das Lenkradskelett (1 , 5, 9, 13) in einer ersten Schäumform mit einem weichen formbeständigen Schaummaterial (2, 6, 10, 14) bedeckt wird, und dass das vorgeschäumte Lenkrad nach Ablauf der Reaktionszeit in einer zweiten Schäumform mit einer härteren Deckschicht (3, 8) überschäumt wird.9. A method for producing a lining for a steering wheel, in particular according to the preceding claims, characterized in that the steering wheel skeleton (1, 5, 9, 13) in a first foaming mold with a soft, dimensionally stable foam material (2, 6, 10, 14) is covered, and that the prefoamed steering wheel is foamed after the reaction time in a second foam mold with a harder cover layer (3, 8).
10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass auf die Innenwand der ersten Schäumform die geometrische Struktur (7) der Berührungsfläche des weichen Schaummaterials mit der in der zweiten Schaumform aufzubringenden Deckschicht aufgebracht wird.10. The method according to claim 9, characterized in that is applied to the inner wall of the first foam mold, the geometric structure (7) of the contact surface of the soft foam material with the applied in the second foam layer cover layer.
1 1. Verfahren nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass die härtere Deckschicht (11 , 15) mit Leder (12, 16) überzogen wird. 1 1. A method according to claim 9 or 10, characterized in that the harder cover layer (11, 15) with leather (12, 16) is coated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007017467A DE102007017467A1 (en) | 2007-04-11 | 2007-04-11 | Steering wheel with foam surround and method for producing a steering wheel |
| DE102007017467.7 | 2007-04-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008125566A1 true WO2008125566A1 (en) | 2008-10-23 |
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ID=39673237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2008/054289 WO2008125566A1 (en) | 2007-04-11 | 2008-04-09 | Steering wheel comprising foam cladding and method for producing a steering wheel |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102007017467A1 (en) |
| WO (1) | WO2008125566A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114987359A (en) * | 2022-06-28 | 2022-09-02 | 延锋汽车智能安全系统有限责任公司 | Steering wheel decoration piece |
| DE102022214458A1 (en) | 2022-12-31 | 2024-07-11 | Joyson Safety Systems Germany Gmbh | Steering handle for a vehicle and method for producing a steering handle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2961155B1 (en) * | 2010-06-10 | 2012-06-15 | Peugeot Citroen Automobiles Sa | INTEGRATED CORD FLYWHEEL FOR THE DESOLIDARIZATION OF ITS TRIM |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3227000A (en) * | 1961-11-20 | 1966-01-04 | Gits Jules Paul | Molded articles and methods of making same |
| EP0429410A2 (en) * | 1989-11-22 | 1991-05-29 | GALLINO COMPONENTI PLASTICI S.p.A. | A method for the manufacture, by the moulding of plastics material, of a motor-vehicle steering wheel which looks like a steering wheel covered with natural leather |
| EP0446394A1 (en) * | 1990-03-15 | 1991-09-18 | Petri AG | Steering wheel manufacturing process |
| EP1413426A1 (en) * | 2002-10-22 | 2004-04-28 | Trw Vehicle Safety Systems, Inc. | Wrapped steering wheel free of adhesive interface |
| WO2005068152A2 (en) * | 2004-01-03 | 2005-07-28 | Johnson Controls Technology Company | Vehicle component and method for making a vehicle component |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10036069B4 (en) | 2000-07-17 | 2004-12-09 | Takata-Petri Ag | steering wheel |
| DE10059133A1 (en) * | 2000-11-29 | 2001-08-16 | Trw Automotive Safety Sys Gmbh | Method for making vehicle steering wheel involves casting one-piece skeleton with hub, spoke and rim and then covering rim with soft foam and then sticking on further leather covering |
| DE10123520C1 (en) * | 2001-05-15 | 2002-10-10 | Trw Automotive Safety Sys Gmbh | Production of a steering wheel comprises manufacturing a steering wheel frame having a closed annular section with an open hollow profile, inserting a body into the open hollow profile, and coating the frame with foam and/or leather |
| US20030037633A1 (en) * | 2001-08-20 | 2003-02-27 | Trw Vehicle Safety Systems Inc. | Thermoplastic polyolefin elastomer steering wheel |
| DE102006031859B4 (en) * | 2006-07-10 | 2013-06-06 | Trw Automotive Safety Systems Gmbh | Steering wheel and method of making a steering wheel |
-
2007
- 2007-04-11 DE DE102007017467A patent/DE102007017467A1/en not_active Ceased
-
2008
- 2008-04-09 WO PCT/EP2008/054289 patent/WO2008125566A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3227000A (en) * | 1961-11-20 | 1966-01-04 | Gits Jules Paul | Molded articles and methods of making same |
| EP0429410A2 (en) * | 1989-11-22 | 1991-05-29 | GALLINO COMPONENTI PLASTICI S.p.A. | A method for the manufacture, by the moulding of plastics material, of a motor-vehicle steering wheel which looks like a steering wheel covered with natural leather |
| EP0446394A1 (en) * | 1990-03-15 | 1991-09-18 | Petri AG | Steering wheel manufacturing process |
| EP1413426A1 (en) * | 2002-10-22 | 2004-04-28 | Trw Vehicle Safety Systems, Inc. | Wrapped steering wheel free of adhesive interface |
| WO2005068152A2 (en) * | 2004-01-03 | 2005-07-28 | Johnson Controls Technology Company | Vehicle component and method for making a vehicle component |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114987359A (en) * | 2022-06-28 | 2022-09-02 | 延锋汽车智能安全系统有限责任公司 | Steering wheel decoration piece |
| DE102022214458A1 (en) | 2022-12-31 | 2024-07-11 | Joyson Safety Systems Germany Gmbh | Steering handle for a vehicle and method for producing a steering handle |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007017467A1 (en) | 2008-10-16 |
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