EP1742784A1 - Dispositif d'attenuation et procede pour attenuer les sons dans des les habitacles de vehicules - Google Patents

Dispositif d'attenuation et procede pour attenuer les sons dans des les habitacles de vehicules

Info

Publication number
EP1742784A1
EP1742784A1 EP05740057A EP05740057A EP1742784A1 EP 1742784 A1 EP1742784 A1 EP 1742784A1 EP 05740057 A EP05740057 A EP 05740057A EP 05740057 A EP05740057 A EP 05740057A EP 1742784 A1 EP1742784 A1 EP 1742784A1
Authority
EP
European Patent Office
Prior art keywords
damping
damping device
partitioning
structural element
cavities
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Withdrawn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
EP05740057A
Other languages
German (de)
English (en)
Inventor
Thomas Hasler
Pierre Millet
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.)
Sika Technology AG
Original Assignee
Sika Technology AG
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 Sika Technology AG filed Critical Sika Technology AG
Priority to EP05740057A priority Critical patent/EP1742784A1/fr
Publication of EP1742784A1 publication Critical patent/EP1742784A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/20—Floors or bottom sub-units
    • B62D25/2072—Floor protection, e.g. from corrosion or scratching
    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49609—Spring making
    • Y10T29/49615—Resilient shock or vibration absorber utility

Definitions

  • This invention relates to a damping device, in particular for installation in or on cavities, in particular of vehicles, the damping device comprising a carrier material, a partitioning material and a damping material and the damping device being provided for fastening to a structural element, in particular a vehicle.
  • the damping device is attached to the structural element, in particular a hollow profile structure of an automobile or a similar vehicle, in particular by means of the carrier material, and then the damping material and the partitioning material are expanded or subjected to an expansion, which is in particular a heat-induced expansion.
  • the damping device acts as a highly effective seal or partition and as acoustic damping on the structural element and in particular within the cavity.
  • this invention relates to a method for partitioning and / or soundproofing, in particular in or on cavities, in particular of vehicles, wherein a damping device comprising a carrier material, a partitioning material and a damping material are first attached or arranged on the structural element, and subsequently the partitioning material and the damping material are expanded or expanded - in particular during a stoving process in an electro-immersion painting furnace.
  • a damping device comprising a carrier material, a partitioning material and a damping material are first attached or arranged on the structural element, and subsequently the partitioning material and the damping material are expanded or expanded - in particular during a stoving process in an electro-immersion painting furnace.
  • Damping device serves to seal the structural element or a cavity, which the structural element forms, on the one hand against the penetration of moisture, dust, air and other undesirable liquids and on the other hand to prevent disturbing noises that would otherwise pass through the cavity or would only be reflected to dampen.
  • the upright profile structure of a vehicle body which forms part of a corresponding window opening, is an elongated passageway or cavity that can collect moisture and contaminants and also transmit unwanted noise until the passageway or cavity is at least partially filled with a sealant is which prevents the ingress of moisture and dirt and which also serves as a damper for damping noises that would otherwise be transmitted along the passage or the cavity.
  • a sealant is which prevents the ingress of moisture and dirt and which also serves as a damper for damping noises that would otherwise be transmitted along the passage or the cavity.
  • Many attempts have been made to seal these cavities, including injecting a sealant into the cavity, inserting foam products into such cavities, and using glass fiber mats and the like. These attempts have not been entirely satisfactory due to the inefficiency of the sealing and damping processes, the relatively high cost of the sealing process or sealing material and the fact that many times uneven sealing has been obtained.
  • foams into the cavities themselves has not been entirely satisfactory because of difficulties in controlling where the foam travels after the foam is introduced into the cavity of a vehicle body or the like. Furthermore, more foam has typically been introduced into the body cavity than is actually required to provide some excess foam to prevent moisture from entering the cavity during use of the vehicle. In addition, foams have a limited lifespan in terms of their flexibility before setting, which limits the time available during which the foam can be introduced into the cavity of the vehicle. For these reasons, solutions are known as alternatives for introducing foams into the cavities, in particular of automobile bodies, in which expandable materials are introduced into the cavities. Such materials expand or expand in particular by being heated.
  • Such heating usually takes place in the manufacture of vehicle bodies after the manufacture or assembly of the body-in-white body and after the body has been primed in an electro-dip-painting furnace process. It is furthermore generally known that such expandable materials are introduced into the cavity together with a carrier material - or held by a carrier material. This is it is possible to attach the expandable material in the right place in the cavity.
  • a damping device in particular for installation in or on cavities, in particular of vehicles, the damping device comprising a carrier material and a partitioning material and the damping device being provided for fastening to a structural element, in particular a vehicle, the damping device being a Has damping material and wherein the damping material is provided to form an open-cell cell structure or wherein the damping material has an absorption coefficient for sound waves of greater than about 0.5.
  • the object is achieved by a method for partitioning and / or soundproofing, in particular in or on cavities, in particular of vehicles, wherein in a first step a damping device having a carrier material, a partitioning material and a damping material, in particular according to the invention, on a structural element, in particular one Vehicle, is attached or arranged, wherein in a second step Partitioning material and the damping material is expanded, in particular heat expanded, and wherein the damping material has an open-cell cell structure after the expansion, or wherein the damping material has an absorption coefficient for sound waves of greater than approximately 0.5.
  • the acoustic effect of the damping device according to the invention is based on a combination between a partitioning of the cavities, which acoustically causes sound energy to be reflected in (or to a lesser extent) in or on the damping material and to be absorbed (to a greater extent). This transforms sound energy into heat much more effectively, rendering it harmless. Furthermore, with the damping device according to the invention and the method according to the invention, it is surprisingly possible to continue to use known process sequences and workflows and to use proven materials - in particular for sealing off the cavity by the damping device - that meet the required properties, in particular with regard to corrosion prevention at the boundary between have the bulkhead material and the structural element.
  • the damping device is also referred to below as an expanded part.
  • the partitioning material and / or the damping material is expandable, in particular heat-expandable, and that the expansion of the partitioning material and / or the damping material is provided in such a way that direct contact between the damping material and a wall of the structural element is avoided or excluded.
  • the damping material preferably has an absorption coefficient for sound waves of at least 0.8 - in particular at least in a partial frequency range, in particular between approximately 1 kHz and approximately 5 kHz.
  • this choice of frequency range is of particular relevance, in particular for vehicles, especially road vehicles such as automobiles and trucks, since on the one hand acoustic disturbances in this frequency range are perceived as particularly disturbing - what is also related to the increased sensitivity of human hearing in this frequency range - and secondly, particularly intensive sound sources are present in road vehicles in this frequency range.
  • the damping device according to the invention can be used particularly inexpensively because it can be used like known expandable materials.
  • the partitioning material is provided to form a closed cell cell structure and that the partitioning material has a water absorption which is less than about 10%, preferably less than about 5%, particularly preferably less than about 4% and very particularly preferably less than about 3%. This further reduces the susceptibility to corrosion at the boundary between the bulkhead material and the structural element or its wall. Furthermore, the partitioning material is also more durable and stable because it is less decomposable.
  • the damping device can be fastened to the structural element, in particular in or on the wall of the structural element and in particular by means of a on the carrier material arranged locking element.
  • the damping device can be attached to the structural element or its wall in a reproducible and sufficiently firm or stable manner before the expansion material or the damping material expands.
  • Figure 1 is a schematic representation of a bodyshell of an automobile body in a perspective view.
  • FIG. 2 shows a schematic illustration of a damping device according to the invention arranged between two walls of a structural element, the expandable components of the damping device being expanded;
  • FIG. 3 shows a schematic illustration of a tube filled with the absorption material and the damping material as an example of a cavity
  • FIG. 4 shows the frequency responses belonging to FIG. 3 of the absorption characteristics of the materials of the damping device according to the invention
  • Fig. 5 is a schematic representation of an inventive arranged between two walls of a structural element Damping device, wherein the expandable components of the damping device are not yet expanded.
  • 10 denotes a bodyshell of a vehicle body.
  • a body generally has a plurality of structural elements 14, such as the A, B and C pillars, which in particular extend in an elongated manner and generally also form one or more cavities, at least in a partial area.
  • Damping elements 16 according to the invention extending transversely to the longitudinal extent of the structural elements 14 are indicated in FIG. 1 by arrows at several places. Its task is in particular to seal the cavities as hermetically as possible, so that no gases, no vapors, no liquids and no other substances which may cause damage in the cavities penetrate into the cavity.
  • the damping device 16 has a carrier material 4, a partitioning material 2 and a damping material 3.
  • the damping device 16 is arranged between two walls 1 of the structural element 14, the expandable materials 2, 3 of the damping device 16 being shown expanded.
  • the partitioning material 2 and the damping material 3 preferably lie comparatively flat on the carrier material 4, cf. FIG. 5. It can preferably be provided that the carrier material 4 is additionally connected to the wall 1 or generally to the structural element 14 via one or more latching elements (not shown).
  • FIG. 3 shows a schematic illustration of a tube filled with the absorption material and the damping material as an example of a completely filled cavity in the structural element 14.
  • FIG. 4a shows the frequency response of the absorption characteristic associated with the damping material 3.
  • the frequency in Hertz is shown in logarithmic form on the abscissa of the illustration in FIG. 4a.
  • FIG. 4b shows the frequency responses of the loss factor for two arrangements.
  • the dashed line in FIG. 4b shows the frequency response without the damping material 3 and the solid line in FIG. 4b shows the frequency response with absorbing material or with damping material.
  • the frequency in Hertz is given in linear form on the abscissa of the illustration in FIG. 4b, and the loss factor is given in decibels on the ordinate.
  • the solid line in FIG. 4b therefore indicates the frequency response of the absorption characteristic of the damping device 16 as a whole. It can be seen from the two frequency responses in FIG. 4b and from their comparison that the loss factor of the arrangement with the damping material 3 is clearly above about 40 dB at least over the entire frequency range between 1 kHz and 2 kHz. The combination with the damping material 3 thus results in a clear gain in acoustic behavior compared to an embodiment of the damping device 16 which would only have the partitioning material 2.
  • FIG. 5 shows a schematic representation of an embodiment of the damping device 16 according to the invention, which is slightly modified compared to FIG. 2 and is arranged between two walls 1 of a structural element 14, the expandable components 2, 3 of the damping device 16 having not yet been expanded.
  • FIGS. 2 and 5 are cross sections along essentially the course of structural elements 14, which in particular form a cavity between the walls 1.
  • the connection of the damping device 16 to the wall 1 by means of the sealing material 2 is to be understood as preferably sealing or sealing off an entire cross section of the cavity.
  • the damping material 3 can then be regarded as arranged. It is furthermore clear that only the elements essential for the immediate understanding of the invention are shown.
  • the damping device 16 forms a preformed inflatable part which is introduced into a cavity of the body of a vehicle, in particular a road vehicle, and is preferably fastened there or which is fastened or arranged on a cavity of the vehicle body.
  • the damping device 16 comprises at least the carrier material 4, the damping material 3 and the partitioning material 2.
  • the different materials of the damping device 16 can either be connected to one another in a multi-stage injection molding process or these materials can be produced separately and then connected to one another.
  • the carrier material 4 and the partitioning material 2 are produced together in a two-stage injection molding process and then the damping material 3 is applied or fastened, for example glued.
  • the expansion of the damping material 3 and the partitioning material 2 preferably takes place in an electro-immersion coating furnace process.
  • the damping material 3 has an open-cell structure.
  • sound energy is converted particularly effectively into heat in such a material.
  • a material can be used as the damping material 3 which has the property that the damping material 3 absorbs sound waves to a greater extent than reflects, or which has the property that the damping material has an absorption coefficient for sound waves of greater than approximately 0.5 , in particular in a frequency range between approximately 1 kHz and approximately 2 kHz.
  • This also has a particularly good acoustic effect.
  • the open-celled structure generally also means that such a material is more susceptible to the absorption of water or moisture. It should therefore preferably be avoided that such a material comes into contact with corrodible surfaces or walls 1.
  • a light and stable and preferably non-corrosive material such as polyamide
  • the carrier material 4 is used in particular as the carrier material 4.
  • nylon PA 6.6 which is also made in particular from reusable materials of known origin.
  • the mechanical properties are particularly important, for example the notched impact strength, the elasticity, the elongation at break or tear, the bending elongation, the softening temperature and the moisture absorption capacity.
  • the carrier material is preferably suitable for being processed into 3-dimensional injection molded parts which have sufficient stability to accommodate the other materials of the damping device 16, in particular the damping material 3 and the partitioning material 2, until they expand and also during their expansion hold, fix and also to fix the damping device 16 relative to the structural element 14.
  • the flowability in the molten state is particularly important for processing or shaping the carrier material.
  • other materials with the same or similar properties can also be used as carrier material 4.
  • an (after expansion) open-cell foam is used in particular as the damping material 3, as is present, for example, in the products SikaBaffle® 229 or SikaBaffle® 293 (available from SIKA AG, Switzerland).
  • the damping material is present in particular as an extruded, heat-expandable and rubber-based acoustic barrier.
  • the material SikaBaffle® 229 comprises two layers of material, which are produced coextruded with each other, of which the lower layer is a black, sticky and non-reactive adhesive layer with a density of, for example, 1.2 kg / dm 3 and of which the upper (expandable) layer is one is dark gray, slightly sticky and highly expandable expansion layer with a density of, for example, 1.5 kg / dm 3 .
  • the material SikaBaffle® 229 has a very high expansion capacity of more than 900%, it has excellent sound-absorbing, ie sound-absorbing, properties, is self-adhesive, can be pre-dimensioned, has a soft consistency for making full contact even with irregular surfaces, has good adhesive properties on oily metal and generally on oily, phosphated and / or electro-coated surfaces, has good aging properties and is also non-toxic.
  • Such a material preferably has the following properties: it expands in 30 minutes at 150 ° C. by over 600%, in 30 minutes at 165 ° C. to over 900% and in 30 minutes at 180 ° C.
  • the material can be used in the temperature range from -30 ° C to 70 ° C, is resistant to water, salt water and lubricating oils, has a water absorption (after expansion) of less than 5% and a flash point (according to ASTM D92, COC) of over 200 ° C.
  • water absorption after expansion
  • flash point according to ASTM D92, COC
  • thermoplastic or injection-molded molded parts such as, for example, the materials SikaBaffle® 250 or SikaReinforcer® 911 PB (available from SIKA AG, Switzerland).
  • materials are preferably introduced as a molded part and on supports in the bodyshell structure of the body, for example in the cavities of the A, B, C pillars, the roof frame and / or the sills.
  • the operational functionality is achieved after the expansion process in the electro-immersion painting furnace (KTL furnace).
  • the material SikaBaffle® 250 enables tight sealing of complex shaped cavities and is compatible with all products used as standard in the process sequence of the body shop, is odorless, is compatible with paints and does not cause any contamination in the electro-dip painting bath (KTL bath).
  • the material SikaReinforcer® 911 PB gives the body or the body cavities, in addition to these aforementioned properties, increased rigidity. In particular, both materials have very good properties which prevent or delay the corrosion of adjacent or adjacent metal parts - in particular walls 1 of structural elements 14 - so that there is corrosion protection of more than 1000 hours in a salt spray bath or 10 Rd VDA and neither edge corrosion nor rusting occurs.
  • the water absorption capacity (depending on the test method) is less than 4%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

L'invention concerne un dispositif d'atténuation (16), en particulier être encastré dans des habitacles ou posés sur les habitacles dans des véhicules, et un procédé, selon lequel le dispositif d'atténuation (16) comprend un matériau support (4) et un matériau de cloisonnement (2), ledit dispositif (16) étant destiné à être fixé sur un élément de structure (1), en particulier des véhicules. Ledit dispositif (16) comprend un matériau d'atténuation (3), ce dernier étant conçu pour créer une structure cellulaire à alvéoles ouvertes, ledit matériau présentant un coefficient d'absorption des ondes sonores supérieur ou égal à 0,5.
EP05740057A 2004-04-27 2005-04-27 Dispositif d'attenuation et procede pour attenuer les sons dans des les habitacles de vehicules Withdrawn EP1742784A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05740057A EP1742784A1 (fr) 2004-04-27 2005-04-27 Dispositif d'attenuation et procede pour attenuer les sons dans des les habitacles de vehicules

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04101772A EP1591224A1 (fr) 2004-04-27 2004-04-27 Dispositif et procédé d'amortissement du son dans espaces creux de véhicules
EP05740057A EP1742784A1 (fr) 2004-04-27 2005-04-27 Dispositif d'attenuation et procede pour attenuer les sons dans des les habitacles de vehicules
PCT/EP2005/051891 WO2005105405A1 (fr) 2004-04-27 2005-04-27 Dispositif d'attenuation et procede pour attenuer les sons dans des les habitacles de vehicules

Publications (1)

Publication Number Publication Date
EP1742784A1 true EP1742784A1 (fr) 2007-01-17

Family

ID=34929024

Family Applications (2)

Application Number Title Priority Date Filing Date
EP04101772A Withdrawn EP1591224A1 (fr) 2004-04-27 2004-04-27 Dispositif et procédé d'amortissement du son dans espaces creux de véhicules
EP05740057A Withdrawn EP1742784A1 (fr) 2004-04-27 2005-04-27 Dispositif d'attenuation et procede pour attenuer les sons dans des les habitacles de vehicules

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP04101772A Withdrawn EP1591224A1 (fr) 2004-04-27 2004-04-27 Dispositif et procédé d'amortissement du son dans espaces creux de véhicules

Country Status (3)

Country Link
US (1) US8028799B2 (fr)
EP (2) EP1591224A1 (fr)
WO (1) WO2005105405A1 (fr)

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