DE3932121A1 - Soft foam filling of vehicle bodywork to reduce noise - in which two=part polyurethane foam with filler is injected into cavities adjacent noisy elements - Google Patents
Soft foam filling of vehicle bodywork to reduce noise - in which two=part polyurethane foam with filler is injected into cavities adjacent noisy elementsInfo
- Publication number
- DE3932121A1 DE3932121A1 DE3932121A DE3932121A DE3932121A1 DE 3932121 A1 DE3932121 A1 DE 3932121A1 DE 3932121 A DE3932121 A DE 3932121A DE 3932121 A DE3932121 A DE 3932121A DE 3932121 A1 DE3932121 A1 DE 3932121A1
- Authority
- DE
- Germany
- Prior art keywords
- cavities
- foam
- filler
- injected
- polyurethane foam
- 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.)
- Ceased
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
- B62D29/001—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material
- B62D29/002—Superstructures, understructures, or sub-units thereof, characterised by the material thereof characterised by combining metal and synthetic material a foamable synthetic material or metal being added in situ
-
- 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
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/18—Filling preformed cavities
-
- 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
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/14—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine ausgeschäumte Fahrzeugkarosserie nach dem Oberbegriff des Anspruchs 1.The invention relates to a foamed vehicle body the preamble of claim 1.
Kraftfahrzeuge mit ausgeschäumten Hohlräumen in der Karosserie sind aus der DE-OS 27 47 721 und 36 36 113 bekanntgeworden. Zur Ausschäumung werden meist Silikonschäume verwendet, die zur Absenkung von Schalldruckpegeln nur eine unzureichende Wirkung aufweisen.Motor vehicles with foamed cavities in the body are from the DE-OS 27 47 721 and 36 36 113 become known. For foaming Mostly silicone foams are used to lower sound pressure levels only have an insufficient effect.
Aufgabe der Erfindung ist es, eine Ausschäumung von Hohlräumen in Fahrzeugkarosserien zu schaffen, die eine meßbare Geräuschabsenkung im Fahrzeuginnenraum gewährleistet.The object of the invention is to foam in cavities To create vehicle bodies that have a measurable noise reduction in the Guaranteed vehicle interior.
Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs gelöst.This object is achieved by the characterizing features of Claim solved.
Die mit der Erfindung hauptsächlich erzielten Vorteile bestehen darin, daß durch die Ausschäumung von Hohlräumen mit einem Zwei-Komponenten-Polyurethan-Weichschaum eine hörbare Schalldruckpegelabsenkung erreicht wird, die gegenüber der Verwendung von anderen Schäumen wesentlich ist. So wird nach der Erfindung in Bereichen der Karosserie, die benachbart von wesentlichen Geräuschquellen bzw. Anregungsorten liegen, so z.B. im Bereich des Motors, der Lagerung des Stoßdämpfers usw. eine Ausschäumung nur dieser Teilbereiche vorgenommen.The main advantages achieved with the invention are that by filling cavities with a Two-component flexible polyurethane foam an audible Sound pressure level reduction is achieved compared to the use of other foams is essential. So according to the invention in areas of Body that is adjacent to significant sources of noise or There are places of inspiration, e.g. in the area of the engine, the storage of the Shock absorber, etc., only foamed these sub-areas.
Hierdurch können Geräuschnebenweganteile, Hohlraumresonanzen, Durchflutungsgeräusche, Geräuschabstrahlungen und Wärmebrücken gezielt am Ort der Entstehung abgebaut bzw. vermindert werden.As a result, noise bypass components, cavity resonances, Flooding noises, noise emissions and thermal bridges Place of origin are reduced or reduced.
Die Begrenzung der Ausschäumung auf einen Teilbereich der Hohlräume wird durch eingesetzte elastische Abschlußelemente erzielt, die ein Ausfließen des eingebrachten Schaums in den Hohlraum verhindern. The limitation of the foaming to a partial area of the cavities achieved by inserted elastic closure elements that leak prevent the foam introduced into the cavity.
Durch die ausgefüllten Bereiche der Fahrzeugkarosserie mit Schaum wird keine Verstärkung des jeweiligen Bereichs erzielt, die Strukturen bleiben durchgehend von gleicher Elastizität.Due to the filled areas of the vehicle body with foam, none Strengthening the respective area achieved, the structures remain consistently of the same elasticity.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigtAn embodiment of the invention is shown in the drawing and is described in more detail below. It shows
Fig. 1 eine Fahrzeugkarosserie mit ausgeschäumten Bereichen, Fig. 1 shows a vehicle body with foam-filled areas,
Fig. 2 einen Schnitt nach der Linie II-II der Fig. 1 durch eine Säule, und Fig. 2 shows a section along the line II-II of Fig. 1 by a column, and
Fig. 3 ein Diagramm mit Schalldruckpegelkennlinien von Karosserien mit ausgeschäumten Hohlräumen und freien Hohlräumen. Fig. 3 is a diagram showing sound pressure level characteristics of car bodies with foam-filled cavities and free cavities.
Bei einer Fahrzeugkarosserie 1 können z.B. in Bereichen 3, 4 und 5 der Struktur aufgrund von äußeren und/oder inneren Schwingungsanregungen, z.B. durch Aggregate und dergleichen, störende Geräusche entstehen, die durch ein Ausschäumen der in diesen Bereichen liegenden Hohlräume 6, 7 und 8 mit einem Zwei-Komponenten-Polyurethan-Weichschaum vermieden bzw. herabgesetzt werden.In the case of a vehicle body 1 , disturbing noises can arise, for example, in areas 3 , 4 and 5 of the structure due to external and / or internal vibration excitations, for example from aggregates and the like, which are caused by foaming the cavities 6 , 7 and 8 located in these areas a two-component polyurethane foam can be avoided or reduced.
Der Weichschaum 14 weist vorzugsweise eine Dichte von < 60 kp/m3 auf und ist durch eine definierte Beimischung von Füllstoffen geeignet, Geräusche zu absorbieren, Hohlraumwandungen zu bedämpfen und eine Dämmung von geräuschbeaufschlagten Flächen zu bewirken.The soft foam 14 preferably has a density of <60 kp / m 3 and, by a defined admixture of fillers, is suitable for absorbing noises, damping cavity walls and for insulating surfaces exposed to noise.
Die ausgeschäumten Bereiche 3, 4 und 5 der Karosseriehohlräume 6, 7 und 8 sind vor dem Einfüllen des Weichschaumes durch elastische Abschlußelemente 9, 10 und 11 begrenzt, so daß gezielt die gewünschten Bereiche mit Polyurethan-Weichschaum ausfüllbar sind und die anschließenden Hohlräume frei von Weichschaum sind.The foamed areas 3 , 4 and 5 of the body cavities 6 , 7 and 8 are delimited by elastic sealing elements 9 , 10 and 11 before the soft foam is filled in, so that the desired areas can be filled with flexible polyurethane foam and the subsequent cavities are free of soft foam are.
Ein Diagramm gemäß Fig. 3 zeigt zwei Geräuschkennlinien, wobei auf der Ordinate der Schallpegel in dB und auf der Abszisse die Fahrzeuggeschwindigkeit in km/h aufgetragen ist.A diagram according to FIG. 3 shows two noise characteristics, the sound level in dB on the ordinate and the vehicle speed in km / h on the abscissa.
In diesem Diagramm ist ein Vergleich im Geräuschverhalten von Fahrzeugen mit ausgefüllten Hohlräumen (strichpunktierte Kennlinie) und freien Hohlräumen (ausgezogene Kennlinie) in der Fahrzeugkarosserie dargestellt. Wie z.B. bei einer Fahrzeuggeschwindigkeit von 100 km/h gezeigt ist, beträgt die Verminderung des Schalldruckpegels bei einem Fahrzeug mit gezielt ausgeschäumten Hohlräumen ca. 3 dB.In this diagram is a comparison in the noise behavior of vehicles with filled cavities (dash-dotted curve) and free cavities (solid curve) shown in the vehicle body. Such as. at a vehicle speed of 100 km / h is shown Reduction of the sound pressure level in a vehicle with targeted foamed cavities approx. 3 dB.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3932121A DE3932121A1 (en) | 1989-09-27 | 1989-09-27 | Soft foam filling of vehicle bodywork to reduce noise - in which two=part polyurethane foam with filler is injected into cavities adjacent noisy elements |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3932121A DE3932121A1 (en) | 1989-09-27 | 1989-09-27 | Soft foam filling of vehicle bodywork to reduce noise - in which two=part polyurethane foam with filler is injected into cavities adjacent noisy elements |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3932121A1 true DE3932121A1 (en) | 1991-04-04 |
Family
ID=6390230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3932121A Ceased DE3932121A1 (en) | 1989-09-27 | 1989-09-27 | Soft foam filling of vehicle bodywork to reduce noise - in which two=part polyurethane foam with filler is injected into cavities adjacent noisy elements |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3932121A1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995013938A1 (en) * | 1993-11-19 | 1995-05-26 | Cambridge Industries, Inc. | Blow molded structural interior automotive parts |
DE19509972A1 (en) * | 1995-03-18 | 1996-09-19 | Krauss Maffei Verkehrstechnik | Sandwich panels |
US5614285A (en) * | 1994-12-02 | 1997-03-25 | Ceats | Molded panel having a decorative facing and made from a blend of natural and plastic fibers |
US5700050A (en) * | 1993-11-19 | 1997-12-23 | Cambridge Industries, Inc. | Blow molded structural interior automotive parts |
WO1998006601A1 (en) * | 1996-08-13 | 1998-02-19 | Möller Plast GmbH | Motor vehicle with heat insulation |
EP0844167A3 (en) * | 1996-11-21 | 1998-12-23 | Wilhelm Karmann GmbH | Vehicle body part, in particular frame member. |
WO2001058739A1 (en) * | 2000-02-12 | 2001-08-16 | Volkswagen Aktiengesellschaft | Auxiliary frame for a motor vehicle |
DE10260531A1 (en) * | 2002-12-21 | 2004-07-01 | Volkswagen Ag | Procedure for creating of support between motor vehicle's body part and adjacent assembly part involves fixing assembly part at defined distance from body part and then filling cavity with installation foam |
US7267386B2 (en) | 1996-08-13 | 2007-09-11 | Rolf Hesch | Motor vehicle passenger compartment heat insulation and dissipation |
US7686992B2 (en) * | 2003-06-11 | 2010-03-30 | Komatsu Ltd. | Interior member for cab of work vehicle and method for forming same, as well as wall member |
WO2015086118A1 (en) * | 2013-12-09 | 2015-06-18 | Audi Ag | Method for manufacturing a vehicle body element and vehicle body element |
US9108676B2 (en) | 2010-10-23 | 2015-08-18 | Audi Ag | Subframe for a motor vehicle |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1196433B (en) * | 1960-12-29 | 1965-07-08 | Minnesota Mining & Mfg | Device for damping vibrations |
FR1418850A (en) * | 1964-06-01 | 1965-11-26 | Simca Automobiles Sa | Process for closing a hollow body at a determined point |
DE2747721A1 (en) * | 1977-10-25 | 1979-04-26 | Daimler Benz Ag | METHOD AND DEVICE FOR FOAMING BODY CAVITY SPACES |
DE3313624A1 (en) * | 1983-04-12 | 1984-10-18 | Teroson Gmbh, 6900 Heidelberg | POLYURETHAN SOFT FOAM FOR SOUND PROTECTION PURPOSES, METHOD FOR THE PRODUCTION AND USE THEREOF |
DE3636113A1 (en) * | 1985-10-24 | 1987-04-30 | Dow Corning Ltd | METHOD FOR FORMING A FOAMED DIMENSION IN A CAVITY |
-
1989
- 1989-09-27 DE DE3932121A patent/DE3932121A1/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1196433B (en) * | 1960-12-29 | 1965-07-08 | Minnesota Mining & Mfg | Device for damping vibrations |
FR1418850A (en) * | 1964-06-01 | 1965-11-26 | Simca Automobiles Sa | Process for closing a hollow body at a determined point |
DE2747721A1 (en) * | 1977-10-25 | 1979-04-26 | Daimler Benz Ag | METHOD AND DEVICE FOR FOAMING BODY CAVITY SPACES |
DE3313624A1 (en) * | 1983-04-12 | 1984-10-18 | Teroson Gmbh, 6900 Heidelberg | POLYURETHAN SOFT FOAM FOR SOUND PROTECTION PURPOSES, METHOD FOR THE PRODUCTION AND USE THEREOF |
DE3636113A1 (en) * | 1985-10-24 | 1987-04-30 | Dow Corning Ltd | METHOD FOR FORMING A FOAMED DIMENSION IN A CAVITY |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5700050A (en) * | 1993-11-19 | 1997-12-23 | Cambridge Industries, Inc. | Blow molded structural interior automotive parts |
WO1995013938A1 (en) * | 1993-11-19 | 1995-05-26 | Cambridge Industries, Inc. | Blow molded structural interior automotive parts |
US5614285A (en) * | 1994-12-02 | 1997-03-25 | Ceats | Molded panel having a decorative facing and made from a blend of natural and plastic fibers |
DE19509972A1 (en) * | 1995-03-18 | 1996-09-19 | Krauss Maffei Verkehrstechnik | Sandwich panels |
US5664397A (en) * | 1995-03-18 | 1997-09-09 | Krauss-Maffei Verkehrstechnik Gmbh | Sandwich plate for use as motor-vehicle body part |
DE19509972C2 (en) * | 1995-03-18 | 1998-04-09 | Krauss Maffei Verkehrstechnik | Sandwich plate |
US7267386B2 (en) | 1996-08-13 | 2007-09-11 | Rolf Hesch | Motor vehicle passenger compartment heat insulation and dissipation |
WO1998006601A1 (en) * | 1996-08-13 | 1998-02-19 | Möller Plast GmbH | Motor vehicle with heat insulation |
US6561562B1 (en) | 1996-08-13 | 2003-05-13 | Moller Plast Gmbh | Motor vehicle with heat insulation |
EP0844167A3 (en) * | 1996-11-21 | 1998-12-23 | Wilhelm Karmann GmbH | Vehicle body part, in particular frame member. |
WO2001058739A1 (en) * | 2000-02-12 | 2001-08-16 | Volkswagen Aktiengesellschaft | Auxiliary frame for a motor vehicle |
DE10260531A1 (en) * | 2002-12-21 | 2004-07-01 | Volkswagen Ag | Procedure for creating of support between motor vehicle's body part and adjacent assembly part involves fixing assembly part at defined distance from body part and then filling cavity with installation foam |
DE10260531B4 (en) * | 2002-12-21 | 2016-11-24 | Volkswagen Ag | Device for creating a support between a body component and at least one adjacent mounting part of motor vehicles |
US7686992B2 (en) * | 2003-06-11 | 2010-03-30 | Komatsu Ltd. | Interior member for cab of work vehicle and method for forming same, as well as wall member |
US7753426B2 (en) | 2003-06-11 | 2010-07-13 | Komatsu Ltd. | Interior member for cab of work vehicle and method for forming same, as well as wall member |
US9108676B2 (en) | 2010-10-23 | 2015-08-18 | Audi Ag | Subframe for a motor vehicle |
WO2015086118A1 (en) * | 2013-12-09 | 2015-06-18 | Audi Ag | Method for manufacturing a vehicle body element and vehicle body element |
US10828810B2 (en) | 2013-12-09 | 2020-11-10 | Audi Ag | Method for the production of a vehicle body element and vehicle body element |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8120 | Willingness to grant licences paragraph 23 | ||
8131 | Rejection |