EP1758765A1 - Habillage de paroi de separation autoporteur, a effet insonorisant, destine a des vehicules automobiles - Google Patents

Habillage de paroi de separation autoporteur, a effet insonorisant, destine a des vehicules automobiles

Info

Publication number
EP1758765A1
EP1758765A1 EP05746515A EP05746515A EP1758765A1 EP 1758765 A1 EP1758765 A1 EP 1758765A1 EP 05746515 A EP05746515 A EP 05746515A EP 05746515 A EP05746515 A EP 05746515A EP 1758765 A1 EP1758765 A1 EP 1758765A1
Authority
EP
European Patent Office
Prior art keywords
front wall
sound absorber
wall cladding
plastic frame
cladding according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05746515A
Other languages
German (de)
English (en)
Inventor
Heinz BLÖMELING
Volkmar Abeck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABECK, VOLKMAR
Original Assignee
Carcoustics Tech Center GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carcoustics Tech Center GmbH filed Critical Carcoustics Tech Center GmbH
Publication of EP1758765A1 publication Critical patent/EP1758765A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0815—Acoustic or thermal insulation of passenger compartments
    • B60R13/083—Acoustic or thermal insulation of passenger compartments for fire walls or floors

Definitions

  • the invention relates to a front wall cladding for motor vehicles for shielding the passenger compartment from the engine compartment, with a sound absorber formed from at least regionally pressed nonwoven material.
  • a generic end wall cladding is known from DE 37 34239 A1.
  • the cladding comprises a first cover fleece facing the engine compartment, a cotton fiber fleece and a second cover fleece facing the end wall, a mineral fiber layer being arranged between the first cover fleece and the cotton fiber fleece.
  • the mineral fiber layer contains thermoset mineral fibers.
  • the fibers of the cotton fiber fleece can be thermoset or thermoplastic bonded.
  • a mass layer with a specific weight of 0.9 to 2.5 g / cm 3 which is formed from PUR foam material with fillers, is arranged between the cotton fiber fleece and the second cover fleece. The bond between the individual layers is achieved by pressing under the simultaneous effect of temperature.
  • the cover tiles are provided with adhesive on the layers facing the composite, which softens under the influence of temperature.
  • This known front wall cladding is relatively heavy, which is disadvantageous with regard to the vehicle weight and the fuel consumption dependent on it.
  • their production is relatively complex and pure recycling is hardly possible due to their different layer materials.
  • end wall claddings for motor vehicles are known, which are made, among other things, of glass fiber-reinforced thermoplastic material with fillers such as heavy spar and a soft layer of open-pore Polyurethane foam are made (DE 92 13 804 U1). Such end wall claddings are also relatively heavy.
  • the invention has for its object to provide a self-supporting front wall cladding of the type mentioned, which has a low weight and good sound absorption.
  • the end wall cladding should have favorable assembly properties and be inexpensive to produce.
  • this object is achieved by a front wall cladding with the features of claim 1.
  • the front wall cladding according to the invention has a sound absorber formed at least in some areas of pressed non-woven material, which has a length-related flow resistance in the range from 6 to 40 kNs / m 4 and is provided with a plastic frame which gives the front wall cladding self-supporting properties, the plastic frame being injected or pressed behind Non-woven material is formed and has at least one rung-like connecting strip on which at least one integrated fastening means for fastening a cable, a hose line or a functional part is formed on the front wall cladding.
  • the sound absorber formed from at least some areas of pressed nonwoven material is remarkably light and has a high sound absorption capacity. In itself, however, it does not have sufficient strength with regard to the intended assembly.
  • the front wall cladding according to the invention obtains the required strength from the plastic frame formed by injecting or pressing in the pressed nonwoven material, the weight of the frame being significantly less than that of a conventional, essentially full-area support.
  • the rung-like connecting strip of the plastic frame increases the stability of the front wall cladding.
  • the total weight of the front wall cladding according to the invention is thus significantly less than that of conventional self-supporting front wall claddings.
  • fastening means can be designed, for example, in the form of hooks or so-called clips.
  • the front wall cladding according to the invention also has favorable recycling properties due to its plastic frame. This is because the sound absorber made of non-woven material and the plastic frame acting as a carrier can be separated from each other much more easily than when using a conventional flat carrier to which the sound absorber is connected over the entire surface. In contrast, in the case of the front wall cladding according to the invention, there is a considerably reduced area connection to the carrier with respect to the sound absorber, as a result of which the separation from the carrier and thus the recycling of the end wall cladding is greatly simplified.
  • An advantageous embodiment of the plastic frame is that it has at least one stiffening rib and / or at least one stiffening web.
  • the strength, in particular flexural strength, of the frame can be increased with the same or preferably reduced frame mass.
  • the sound absorber is preferably made of a volume fleece.
  • the volume fleece used has an initial thickness which is, for example, in the range from 70 to 100 mm. It is pressed into a three-dimensional embossed part, the average thickness of which is 8 to 25 mm, in particular 10 to 20 mm.
  • the nonwoven material or the sound absorber has a weight per unit area in the range from 500 to 1200 g / m 2 , preferably in the range from 800 to 1100 g / m 2 .
  • Its length-related flow resistance is in the range from 6 to 40 kNs / m 4 , preferably in the range from 9 to 35 kNs / m 4 .
  • a further advantageous embodiment of the front wall cladding according to the invention consists in that the relatively soft sound absorber, in order to achieve a flexible seal on adjacent body parts or other add-on parts, has at least a length section of its circumference over the The outer edge of the plastic frame protrudes. The section of the sound absorber protruding on the edge forms a type of sealing lip.
  • the nonwoven material is formed from microfibers based on polyester and bicomponent fibers.
  • the nonwoven material can be composed of approximately 75% by weight polyester microfibers and approximately 25% by weight bicomponent fibers.
  • Fig. 1 is a front view of an end wall covering according to the invention
  • FIG. 2 is a sectional view of the front wall covering according to FIG. 1 along the line A-A;
  • FIG. 3 shows a sectional view of a variant of the front wall cladding according to the invention.
  • Fig. 4 is a sectional view of a further variant of the front wall cladding according to the invention.
  • the end wall cladding 1 shown in FIGS. 1 and 2 serves as a sound-insulating shield for the passenger compartment of a motor vehicle from the engine compartment. It is mounted on the engine bulkhead on the engine side.
  • the end wall cladding 1 is adapted to the shape and dimensions of the associated end wall. It comprises a sound absorber 2, which is formed from pressed nonwoven material.
  • the nonwoven material is preferably a bulk nonwoven (also called bulk nonwoven), in particular a bulk nonwoven Polyester fibers, preferably made of polyethylene terephthalate fibers.
  • the fibers are relatively fine.
  • a volume fleece made of microfibers, the fineness of which is in the range from 0.1 to 1.0 dtex, is preferably used.
  • the volume fleece has a weight per unit area in the range from 500 to 1200 g / m 2 , with a range from 800 to 1100 g / m 2 being particularly preferred.
  • a blank or web section of a corresponding volume fleece with an initial thickness in the range of, for example, 70 to 100 mm is pressed into a three-dimensional stamping part by means of a stamping tool.
  • the sound absorber 2 produced in this way has a length-related flow resistance in the range from 6 to 40 kNs / m 4 , preferably 9 to 35 kNs / m 4 .
  • the average thickness of the sound absorber 2 is in the range of, for example, 8 to 25 mm, in particular in the range of 10 to 20 mm.
  • the volume fleece preferably contains bicomponent fibers, one component having a hot-melt adhesive function.
  • the bicomponent fibers, the proportion of which in the volume nonwoven is preferably in the range from about 20 to 30% by weight, improve the dimensional stability of the three-dimensional structure of the sound absorber 2.
  • the sound absorber 2 is provided with a plastic frame 3, which is formed by injecting or injecting the pressed nonwoven material.
  • the plastic frame 3 gives the front wall cladding 1 self-supporting properties.
  • the material of the injection molded frame 3 is preferably polypropylene. However, another thermoplastic material can also be used for the production of the frame 3, in particular glass fiber reinforced plastic.
  • the nonwoven material in the area which is subsequently back-injected with plastic to form the frame 3 is compressed so strongly that the flowable plastic does not break through the nonwoven material.
  • Injection molding of the nonwoven material leads to a material connection between the nonwoven material acting as sound absorber 2 and the plastic frame 3.
  • the plastic frame 3 runs as a closed frame along the edge of the sound absorber 2.
  • a circumferential stiffening web 4 is formed on the plastic frame 3.
  • configurations of the plastic frame 3 are also possible in which the frame is not closed but is, for example, essentially U-shaped and / or has a plurality of separate frame parts.
  • the sound absorber 2 projects beyond the outer edge of the plastic frame 3 to form a flexible, resilient seal on adjacent body parts or add-on parts.
  • the sound absorber 2 can protrude over the outer edge of the plastic frame 3 with at least one longitudinal section of its circumference.
  • the sound absorber 2 projects over its entire circumference over the outer edge of the plastic frame 3.
  • the plastic frame 3 shown in FIG. 1 has several rung-like connecting strips 5.
  • the connecting strips 5 are connected in one piece to the peripheral part of the frame 3.
  • the window-like recesses of the frame 3 are each filled by the sound absorber 2.
  • the cutouts make up significantly more than half of the front of the front wall cladding 1. Their area percentage is preferably even more than two-thirds of the front of the front wall cladding 1.
  • the plastic frame 3 and / or the sound absorber 2 Breakthroughs may be arranged.
  • openings are preferably made as small as possible for the sake of the sound-insulating seal and / or are provided with integrated seals.
  • the openings can be configured, for example, in the form of a sleeve and / or have a plurality of slots which permit flexible expansion of the opening.
  • the peripheral part of the plastic frame 3 and its connecting strip 5 are adapted to the structure of the sound absorber 2.
  • the sound absorber 2 each has a three-dimensional structure with a curvature 6 arranged within a recess in the plastic frame 3. While the peripheral part of the frame 3 is essentially flat, for example the central connecting strip 5 is curved in accordance with the immediately adjacent area of the sound absorber 2.
  • the front wall cladding 1 thus defines one or more closed, air-filled cavities 7 in connection with the associated body end wall (not shown).
  • the plastic frame 3 has at least one integrated fastening means 8 for fastening a cable, a hose line or a functional part to the front wall cladding 1.
  • the fastening means 8 which is integrally formed on the frame 3 can, for example, be designed as a clip or hook.
  • the middle connecting strip 5 is divided into two sections by a gap 9, the mutually facing ends 5.1, 5.2 of which protrude in an arc from the sound absorber 2 and form a holder for a hose line, a cable harness or the like.
  • the elastic ends 5.1, 5.2 of the strip sections are bent or spread apart. After the necessary force has ceased, the strip ends reset elastically.
  • the plastic frame 3 is provided with integrated fastening means 9 for fastening the front wall cladding 1 to an associated motor vehicle front wall.
  • These fastening means 9 can be designed, for example, as latchable plug-in parts, latchable plug-in part receptacles or threaded bores.
  • the fastening means 9 are designed as plug pins which can be locked on the end wall.
  • the pins 9 formed in one piece on the back of the frame penetrate it the sound absorber 2, which has the recesses 10 assigned to the pins 9, which are punched out of the nonwoven material during the embossing process.
  • fastening means 11 for fastening a cable, a hose line or another functional part to the front wall cladding 1 can be formed not only on one or more of the rung-like connecting strips 5, but in particular also on the edge of the frame 3.
  • the fastening means 11 shown in FIG. 3 are essentially C-shaped and have elastically expandable legs. These clip connections are particularly suitable for fastening cables as well as hose or pipe lines.
  • FIG. 4 shows an exemplary embodiment in which a hook-shaped fastening means 12 is molded onto the rung-like connecting strip 5 of the plastic frame 3.
  • This hook-shaped, elastic clip connection is also suitable for fastening cables and other lines to the front wall cladding 1.
  • the exemplary embodiment according to FIG. 4 also differs from the other exemplary embodiments in that, in addition to a stiffening web 4, the plastic frame 3 additionally has at least one stiffening rib 13.
  • the stiffening rib 13 is formed on or near the edge of the frame 3.
  • snap-in pins 9 are in turn formed on the plastic frame 3 and are used to fasten the end wall cladding 1 to an associated engine compartment end wall.
  • FIGS. 3 and 4 also illustrate the sealing function of the front wall cladding 1 already mentioned above. It can be seen that the sound absorber 2 protruding over the edge of the plastic frame 3 rests resiliently on a body or add-on part 14.
  • the design of the front wall cladding according to the invention is not limited to the exemplary embodiments described above. Rather, further variants are possible which make use of the inventive idea disclosed in the claims, even with a fundamentally different design. For example, it is possible to provide the sound absorber 2 partially with a heat shield, in particular with a micro-perforated aluminum foil, on its side facing the engine compartment.

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

L'invention concerne un habillage de paroi de séparation (1) pour des véhicules automobiles, servant à isoler l'habitacle vis-à-vis du compartiment moteur. Cet habillage présente un élément insonorisant (2) constitué d'un matériau non tissé, au moins partiellement comprimé. L'invention est caractérisée en ce que l'élément insonorisant (2) présente une résistance à l'écoulement longitudinal comprise dans une plage allant de 6 à 40 kNs/m4 et est pourvu d'un cadre plastique (3) conférant des propriétés autoporteuses à l'habillage de paroi de séparation (1), ledit cadre (3) étant formé par surmoulage par injection ou compression du matériau non tissé comprimé. Ce cadre plastique (3) présente au moins une bande de raccordement (5) en forme de pousse, sur laquelle est formé au moins un moyen de fixation intégré (8) servant à fixer un câble, une conduite souple ou un élément fonctionnel sur l'habillage de paroi de séparation (1).
EP05746515A 2004-06-21 2005-05-24 Habillage de paroi de separation autoporteur, a effet insonorisant, destine a des vehicules automobiles Withdrawn EP1758765A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200420009726 DE202004009726U1 (de) 2004-06-21 2004-06-21 Schallabsorbierende, selbsttragende Stirnwandverkleidung für Kraftfahrzeuge
PCT/EP2005/005572 WO2005123456A1 (fr) 2004-06-21 2005-05-24 Habillage de paroi de separation autoporteur, a effet insonorisant, destine a des vehicules automobiles

Publications (1)

Publication Number Publication Date
EP1758765A1 true EP1758765A1 (fr) 2007-03-07

Family

ID=34968907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05746515A Withdrawn EP1758765A1 (fr) 2004-06-21 2005-05-24 Habillage de paroi de separation autoporteur, a effet insonorisant, destine a des vehicules automobiles

Country Status (3)

Country Link
EP (1) EP1758765A1 (fr)
DE (1) DE202004009726U1 (fr)
WO (1) WO2005123456A1 (fr)

Families Citing this family (9)

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DE102006018465A1 (de) * 2006-04-19 2007-10-25 Carcoustics Tech Center Gmbh Schallisolierendes Bauteil für Kraftfahrzeuge und Verfahren zu dessen Herstellung
DE202006009245U1 (de) * 2006-06-09 2007-10-11 Carcoustics Tech Center Gmbh Luftschall absorbierende Motorraumverkleidung für Kraftfahrzeuge, insbesondere Motorhaubenverkleidung
DE102009020996A1 (de) 2009-05-12 2010-11-18 Aksys Gmbh Luftschall isolierender Materialaufbau
DE102010020571A1 (de) * 2009-12-23 2011-06-30 Volkswagen AG, 38440 Stirnwandanordnung für einen Motorraum eines Kraftfahrzeugs
US8672394B2 (en) * 2010-06-09 2014-03-18 Suzuki Motor Corporation Dash panel structure for automobile
DE102010035431A1 (de) 2010-08-26 2012-03-01 Entwicklungsgesellschaft für Akustik (EfA) mit beschränkter Haftung Breitbandiger Schallabsorber
DE102011078935A1 (de) 2011-07-11 2013-01-17 Bayerische Motoren Werke Aktiengesellschaft Hochabsorptives Schallisolationsbauteil, insbesondere für den Kraftfahrzeuginnenraum
DE102011114052A1 (de) * 2011-09-22 2013-03-28 Volkswagen Aktiengesellschaft Anordnung und Verfahren zur Lagesicherung eines Leitungsstranges an einer Flächenstruktur eines Fahrzeugs und Fahrzeug dazu
DE102020201894A1 (de) 2020-02-14 2021-08-19 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Türmodulträger mit mindestens einer Vliesschicht zur Ausbildung einer Trägerfläche und Herstellungsverfahren

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FR2387822A1 (fr) * 1977-04-21 1978-11-17 Matec Holding Perfectionnements aux elements d'insonorisation pour compartiments de moteurs de vehicules et aux compartiments equipes de tels elements
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Also Published As

Publication number Publication date
DE202004009726U1 (de) 2005-11-10
WO2005123456A1 (fr) 2005-12-29
WO2005123456A8 (fr) 2007-07-12

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