CN110293916A - The soundproofing member and relative manufacturing process of motor vehicles - Google Patents

The soundproofing member and relative manufacturing process of motor vehicles Download PDF

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Publication number
CN110293916A
CN110293916A CN201910222298.3A CN201910222298A CN110293916A CN 110293916 A CN110293916 A CN 110293916A CN 201910222298 A CN201910222298 A CN 201910222298A CN 110293916 A CN110293916 A CN 110293916A
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CN
China
Prior art keywords
upper area
component
porous
ingredient
absorber
Prior art date
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Granted
Application number
CN201910222298.3A
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Chinese (zh)
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CN110293916B (en
Inventor
哈维尔·巴特利耶
弗朗西斯·吕利耶
黄明新
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.)
Adler Pelzer France Grand Est SAS
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Faurecia Automotive Industrie SAS
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Publication of CN110293916A publication Critical patent/CN110293916A/en
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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
    • B32B5/22—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
    • B32B5/24—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 one layer being a fibrous or filamentary layer
    • B32B5/26—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 one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/144—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B5/02—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 structural features of a fibrous or filamentary layer
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    • B32B5/10—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 structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer reinforced with filaments
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    • B32B7/04—Interconnection of layers
    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Textile Engineering (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The present invention relates to the soundproofing member of motor vehicles and relative manufacturing process, soundproofing member includes absorbing structure (16), which includes absorber (18).Absorber (18) includes: porous upper area (22) in its thickness comprising the particulate component (24) being dispersed between fiber (20)；Porous lower area (26), the concentration of the particulate component (24) of particulate component (24) or dispersion without dispersion are less than the concentration of the particulate component (24) of the dispersion of porous upper area (22).The resistance greatly at least 100N.m that porous upper area (22) passes through the porous lower area of resistance ratios (26) that air passes through to air‑3.s, porous lower area (26) is greater than 15000N.m to the unit area impedance that air passes through‑4.s。

Description

The soundproofing member and relative manufacturing process of motor vehicles
Technical field
The present invention relates to a kind of soundproofing members of motor vehicles, comprising:
Spring-mass structure；
Absorbing structure is assembled in spring-mass structure.
Background technique
This component aims to solve the problem that the acoustic problems occurred in substantially closed space, such as the vehicle of motor vehicles Compartment (carpet, roof, door-plate etc.), (baffle etc.) or tire and road (wheel arch etc.) near the noise source of engine Contact.
In general, in lower frequency region, the sound wave that is generated by above-mentioned noise source by with viscoelastic behavior in monolithic or biplate The material of (prestressing force interlayer) form or the acoustic attenuation institute " damping " of porous and elastic mass-spring system.
Within the meaning of the present invention, soundproofing member is mainly logical when preventing intermediate frequency and high frequency sound wave enters sound deadening space Crossing towards the back wave outside noise source or sound deadening space ensures " to insulate against sound ".
When the energy dissipation of sound wave is in absorbing material, soundproofing member is by " acoustic absorption " (in intermediate frequency and high-frequency domain In) operation.
Efficient sound insulation system should be simultaneously by ensuring well to insulate against sound and play a role by absorbing.In order to characterize this The performance of kind of component reduces the concept of index NR using sound, and that takes into account insulate against sound and absorb two concepts: the index can be with It is calculated by following equation:
NR (dB)=TL-10log (S/A),
Wherein, TL is the acoustics reduction index (hereinafter referred to as reduction index) of reflection sound insulation.The index is higher, and it is better to insulate against sound.
A is equivalence absorption area.A is higher, and it is better to absorb.S is the area of part.[to be confirmed]
In order to realize good sound insulation, such as motor vehicle passenger compartment, it is expected that implementing will be on both magnitude The material member advisably to play a role.This is described in many articles, especially in the SIA/CTTM of Le Mang 2002 Article " Buddhist Ji infrasound lightweight concept (the Faurecia Acoustic Light-weight delivered in meeting Concept in) ".
In order to provide good acoustics sound insulation, it is known to use the quality groups of springs formed by porous and elastic basal layer Part is provided with impermeable heavy layer on the basal layer.This impermeable heavy layer usually has great surface quality, special 1kg/m is not greater than it2, and also there is about 1500kg/m3To 2000kg/m3High volume mass.
This acoustic assembly provides good acoustics sound insulation, but relatively heavy.Moreover, its expression power in absorption aspects It can be poor.
In order to reduce the quality of soundproofing member, US2006/0113146 discloses a kind of " double infiltrations " type acoustic assembly, Middle heavy layer is replaced by porous layer.Thin and entrant sound intermediate coat is placed between basic spring layer and porous layer.
This component effectively alleviates the structure of vehicle, but compared with traditional mass-spring system, it was demonstrated that is absorbing Aspect especially effectively but does not provide satisfactory sound insulation.
In order to absorb while improve sound insulation, such as from WO2013026847 known the above-mentioned type four layer assemblies, It includes spring layer, heavy layer, absorbed layer and has resistance non-woven layer, and the resistance for having resistance non-woven layer to pass through air is big In absorbed layer.
Preceding two layers of formation spring-mass structure, mainly ensures sound insulation function.Upper two layers of formation absorbing structure allows Enough absorptions are obtained according to above-mentioned double penetration theories.
Synergistic effect is established between layers, especially when absorbed layer is rigid, to optimize sound insulation simultaneously and absorb special Property.The gross mass of component is substantially reduced, the acoustical behavior without will affect component.
However, the manufacture of this component is relatively expensive.Four layers of then assembled with one another, a large amount of system of this needs should be provided Make step.
In addition, certain relatively expensive in used layer.This especially has the case where resistance non-woven fabrics, by very thin Fiber realized according to fine method to be performed.Equally, light-weight heavy portion is obtained to need to use in terms of filer content Number of polymers is to ensure enough rigidity.Which increase the costs of part.
Finally, the assembling between each layer needs specific type glue to each interface.For example, absorbed layer with it is non-woven The assembling of layer needs interface between layers to keep porosity.On the contrary, the assembling between basic spring layer and heavy layer should It is very firm.
Finally, part obtained has limited rigidity, this to be difficult to be operated on assembly line sometimes.
Summary of the invention
It is a kind of simultaneously in sound insulation and the very effective soundproofing member of absorption aspects the purpose of the present invention is obtaining, simultaneously It is simple to manufacture and cheap and easily operated.
For this purpose, subject of the present invention is the component of the above-mentioned type, which is characterized in that absorbing structure includes absorber, the suction Acceptor includes the fiber of multiple intertextures and/or bonding, which includes: in its thickness
* porous upper area comprising disperse particulate component between the fibers；
* the concentration of the particulate component of porous lower area, the particulate component not dispersed or its dispersion is lower than The concentration of the particulate component of the dispersion of porous upper area；
The resistance height that the porous lower area of resistance ratios that porous upper area passes through air passes through air is at least 100N.m-3.s, porous lower area is greater than 15000N.m to the unit area impedance that air passes through-4.s。
Component according to the present invention may include one or more of following characteristics, these features can be used individually Or it is used with any technically possible combination:
Spring-mass structure includes matrix, which includes the fiber of multiple intertextures and/or bonding, and matrix is in its thickness In include:
* seal upper area comprising disperse extra particulate shape ingredient between the fibers and by extra particulate shape at Divide the melt bonded ingredient for being connected to fiber；
* the extra particulate ingredient of poroelasticity lower area, the extra particulate shape ingredient not dispersed or dispersion Concentration is less than the concentration of the extra particulate shape ingredient of the dispersion of sealing upper area；
The density for the extra particulate shape ingredient being present in sealing upper area, which is greater than, to be present in porous upper area Particulate component density；
The surface quality for sealing upper area is greater than 100g/m2, particularly between 100g/m2With 4000 g/m2Between；
The adhesive composition of sealing upper area is formed by the fusible powder or fused fiber melted；
The thickness for sealing upper area is less than the thickness of poroelasticity lower area；
Porous upper area is greater than 250N.m to the resistance that air passes through-3.s, particularly between 250N.m-3.s and 1500N.m-3.s between.
The thickness of porous upper area is less than 15mm；
The bending stiffness of porous lower area is greater than 0.1N.m；
Absorber is formed as single-piece, and matrix is formed as single-piece.
The invention further relates to a kind of methods for manufacturing the soundproofing member of motor vehicles, comprising the following steps:
* absorbing structure is formed comprising:
The absorber of fibers including multiple intertextures and/or bonding is provided；
Particulate component is blended between the fiber of the porous upper area of absorber；
The porous lower region of the particulate component or absorber that keep the porous lower area of absorber not disperse Concentration of the concentration of the particulate component of the dispersion in domain lower than the particulate component of the dispersion of porous upper area；
The resistance height that the porous lower area of resistance ratios that porous upper area passes through air passes through air is at least 100N.m-3.s, porous lower area is greater than 15000N.m to the unit area impedance that air passes through-4.s；
* absorbing structure and spring-mass structure are fitted together.
According to the method for the present invention may include one or more of following characteristics, these features individually use or with Any technically possible combination is used:
This method includes the steps that forming spring-mass structure comprising:
*, the matrix of fibers including multiple intertextures and/or bonding is provided；
* the extra particulate shape ingredient and adhesive composition of dispersion are blended between the fiber of the upper area of matrix；
* the extra particulate shape ingredient that does not disperse of poroelasticity lower area or poroelasticity lower area are kept The concentration of the extra particulate shape ingredient of dispersion is less than the concentration of the extra particulate shape ingredient of the dispersion of upper area；
* at least partly melt bonded ingredient is to form sealing upper area；
This method is included between admixing step and melting step is provided with extra particulate shape ingredient and connection ingredient Matrix on deposition be provided with the absorber of particulate component, melting step includes that heating simultaneously is provided with particulate component Absorber and the matrix for being provided with extra particulate shape ingredient and connection ingredient；
Assembling steps heat at the same time to be provided with the absorber of particulate component and is provided with extra particulate shape ingredient Implement with after the matrix of connection ingredient, assembling steps include that will be provided with the absorber of particulate component and be provided with volume The matrix joint of outer particulate component and connection ingredient introduces in the cavity of mold so that absorbing structure and spring-mass structure exist Thermoforming in the cavity of mold；
The assembling includes by the way that the adhesive composition at least partly melted is penetrated into absorber from the upper area of matrix Lower area in and by the upper area of matrix be fixed to absorber lower area on.
Detailed description of the invention
By reading following description, only by way of example and with reference to attached drawing, it is better understood with the present invention, In:
- Fig. 1 is the schematic section of the first soundproofing member according to the present invention；
- Fig. 2 and Fig. 3 respectively illustrates the step of loading matrix and absorber with particulate component and adhesive composition View；
- Fig. 4 shows the subsequent step by matrix deposition on the absorbent body；
- Fig. 5 is shown while the subsequent step of thermoforming matrix and absorber.
Specific embodiment
In following all the elements, orientation is usually being generally oriented for motor vehicles.However, term " top ", "upper", " lower section ", "lower", " top " and " lower part " extends in an opposing fashion relative to the reference surface of motor vehicles, in the reference Surface opposite is disposed with sound-insulating member.Therefore, term " lower part " is interpreted as closest to surface and term " top " is farthest away from the table Face.
The first soundproofing member 10 according to the present invention is shown in Fig. 1.The component 10 is intended to the surface towards motor vehicles 12 settings.
Surface 12 is, for example, the sheet metal surface of vehicle, particularly defines floor, top plate, door, separates engine The wheel arch of the baffle in the compartment in cabin, hood or motor vehicles.
Component 10 is intended to directly apply on surface 12.The component can be fixed on the surface 12, advantageous by pin (such as in the case where baffle) or the case where (such as carpet) is placed in aforementioned surfaces.In a variant, component 10 gluings are on the surface 12.
Referring to Fig.1, component 10 includes spring-mass structure 14 for being applied on surface 12 and opposite with surface 12 Ground is applied to the absorbing structure 16 on quality spring 14.
According to the present invention, absorbing structure 16 includes single-piece absorber 18, and the absorber 18 is by multiple intertextures and/or glues The formation of fiber 20 of conjunction.Absorber 18 includes resistance and porous upper area 22 comprising being dispersed between fiber 20 Components 24；And porous lower area 26, the particulate component 24 not dispersed or its particulate component dispersed 24 concentration is less than the concentration of the particulate component 24 of the dispersion in porous upper area 22.
Advantageously, porous upper area 24 further includes that adhesive composition 28 is used to particulate component 24 being bonded to fiber 20.
In this example, absorber 18 is formed by felt or single piece of fabric.
" single-piece " refers to that absorber 18 is formed by single intertexture and/or binder fibre layer, rather than bonds each other Layer assembly.
" felt " refers to the mixture of base fiber and adhesive in the sense of the present invention.Base fiber can be tool There are the valuable fiber and/or recycled fibers, natural fiber or synthetic fibers of one or more properties.What be can be used is natural The example of fiber is flax, cotton, fiber crops, bamboo etc..The example for the synthetic fibers that can be used is mineral fibres (such as glass fibers Dimension) or organic fiber (such as Kevlar, polyamide, acrylic acid, polyester, polypropylene).
Adhesive is preferably formed by fusible fibers, especially polyolefine fiber, especially polypropylene fibre.As modification Example, adhesive are formed by thermosetting resin, especially polyester resin.
In modification, felt include high percentage microfibre, such as more than 50% and advantageously 80% microfibre.
" microfibre " refers to that size is less than 0.9dtex, is advantageously the fiber of 0.7dtex.
In modification, felt contains recycled material, for example originating from the waste in internal or external source, especially motor vehicle Part waste material when the part waste material or vehicle ages of equipment terminate.The waste is for example pulverized and with by fragment, thin slice or In the form incorporation felt of the dispersion fragment of particle composition.Waste component can be separated before or during crushing.
" fabric " refers to the fiber block for being substantially based on thermoplastic polymer, such as polypropylene, polyester or polyamide, It is assembled by needing machine tool without the use of chemical property adhesive.This piece of thermoplasticity containing certain percentage recycles fine Dimension or natural origin fiber.
With reference to Fig. 1, absorber 18 has lower surface 30 and upper surface 32, which is fixed on spring-mass structure On 14, and the upper surface 32 is used for and 14 opposite orientation of spring-mass structure.
Absorbing structure 16 has overall thickness ET, and the overall thickness is perpendicular to surface 12 between lower surface 30 and upper surface 32 It obtains, is greater than 2mm and particular between 5mm and 25mm.
Particulate component 24 is, for example, the filler of powder type.The example of filler is to crush or the chalk, again of cellulosic Spar and/or vermiculite.
Particulate component 24 there is the average-size for being calculated as the number mean value less than 1mm and especially between 5 μm and Between 500 μm.The average-size is for example measured according to ISO 13320-1.
The density of the material of particulate component 18 is constituted less than 5, and particularly between 0.8 and 2.
Adhesive composition 28 is for example formed by polymer powder, such as polyolefin powder, especially polypropylene powder.
In absorbing structure 16, adhesive composition 28 is at least partly melted so that fiber 20 is adhered to particulate component 24, Without melting particulate component 24.
Therefore, particulate component 24 is held in place by adhesive composition 28 relative to fiber 20.
As described above, the concentration of the particulate component 24 in porous upper area 22 is than in porous lower area 26 The concentration of components 24 greatly at least 10%.
Presence of the particulate component 24 in porous upper area 22 encloses the gap being present between fiber 20, this It increases tortuosity and reduces the porosity of porous upper area 22, maintain non-zero porosity.
Therefore, the resistance that porous upper area 22 passes through the porous lower area 26 of resistance ratios that air passes through to air Big at least 100N.m-3.s, the resistance greatly at least 250N.m especially air passed through than porous lower area 26-3.s。
In terms of absolute value, porous upper area 22 is greater than 250N.m to the resistance that air passes through-3.s, and especially Between 250N.m-3And 1500N.m .s-3.s between, particularly between 300N.m-3And 1000N.m .s-3.s between.
The resistance or its unit area impedance pass through to air is by Michel HENRY on October 3rd, 1997 in Le Mang university Paper " measurement of the parameter of characterization porous media, experimental study (the Mesures des of low frequency foam acoustic characteristic of reply paramètres caractérisant un milieu poreux.Etude expérimentale du comportement Acoustique des mousses aux basses fr é quences.) " described in method measurement.
The thickness of porous upper area 22 is usually less than the thickness in region 18.The thickness E S of porous upper area 22 is for example Less than 15mm, particularly between 1mm and 10mm.
In some cases, locally can seek to increase weight and therefore completely filled layer 16.Another of powder is excellent Point is locally more or less to be deposited.
The surface quality of porous upper area 22 is greater than 500g/m2, and between 500g/m2And 3500g/m2Between, favorably Ground is between 1000g/m2And 2000g/m2Between.
Porous lower area 26, which has, to be suitable for air by showing advantageously between 15000N.m-4.s and 80000N.m-4.s between, particular between 20000N.m-4And 50,000N.m .s-4.s the porosity of the unit area impedance between.
The volumetric surface quality of porous lower area 26 is generally between 20kg/m3And 400kg/m3Between, particularly between 50kg/m3And 300kg/m3Between.
Perpendicular to surface 12 obtain porous lower area 20 thickness E I advantageously between 2mm and 35mm, such as Between 5mm and 25mm.
Porous lower area 26 is by rigidifying.Porous lower area 26 advantageously has bending stiffness B to unit width, Greater than 0.01N.m, particularly between 0.1N.m and 1N.m, particularly between 0.1N.m and 0.5N.m.
Bending stiffness B is calculated by following equation:
B=E.h3/ 12, wherein h is the thickness of porous upper area 16, and E is its Young's modulus.
Young's modulus or elasticity modulus are for example published in by C Langlois, R Panneton and N Atalla " quasi-static mechanics characterization of the multinomial for anisotropic material of J.Acoust.SOC.Am.110,3032-3040 (2001) (Polynomial for quasistatic mechanical characterization of variousotropic Materials the measurement of method described in article) ".
Spring-mass structure 14 includes the one-piece base 34 formed by multiple intertextures and/or binder fibre.Matrix 34 has Seal upper area 36 comprising extra particulate shape ingredient 38；And elastic cellular lower area 40, the volume not dispersed The concentration of outer particulate component 38 or extra particulate shape ingredient 38 is less than the extra particulate being dispersed in porous upper area 36 The concentration of shape ingredient 38.
The upper area 36 of spring-mass structure 14 further includes melt bonded ingredient 42, by extra particulate shape ingredient 38 It is adhered to fiber 35 and closes the gap between fiber 35 to realize the leakproofness in upper area 36.
In this example, matrix 34 is formed by felt or single piece of fabric, as described above.
With reference to Fig. 1, matrix 34 has lower surface 44 and lower surface 46, which is used to orient towards surface 12, preferably Ground is for being applied to surface 12, and the upper surface 46 is for oppositely oriented with surface 12, fixed on the upper surface 46 There is the lower surface 30 of absorbing structure 16.
Matrix 34 has overall thickness ET', obtains perpendicular to surface 12.ET' is typically larger than the overall thickness of absorbing structure 16 ET。
Extra particulate shape ingredient 38 is, for example, the filler of powder type.Filler is, for example, barite, chalk or clay.
Extra particulate shape ingredient 38 has the average-size for being calculated as the number mean value less than 1mm and particularly between 5 μm To 500 μm.
The average-size is for example measured according to ISO 13320-1 standard.
The density for constituting the material of extra particulate shape ingredient 38 is greater than 2, and particularly between 3 and 5.
The density for the extra particulate shape ingredient 38 being present in sealing upper area 36, which is greater than, is present in porous upper area The density of particulate component 24 in 22.
The concentration of the extra particulate shape ingredient 38 in upper area 36 is sealed than the extra particulate in lower resilient portion region 40 The concentration of shape ingredient 38 greatly at least 10%.
Adhesive composition 42 in the at a temperature of material powder that melts lower than 200 DEG C for example by can form, such as polymer powder End, such as polyolefin powder.
In spring-mass structure 14, meltable material powder is at least partly melted so that fiber 35 to be adhered to additionally Particulate component 38, without melting extra particulate shape ingredient 38.
Therefore, extra particulate shape ingredient 38 is maintained at appropriate position relative to fiber 35 by the adhesive composition 42 melted It sets.
Melt bonded ingredient 42 seals the gap between fiber 35 also to realize leakproofness.
Therefore, upper area 36 is sealing.Sealing upper area 36 to air by resistance too high cannot pass through Above-mentioned measurement to air by the method for resistance measure.
The thickness E S' of upper area 36 is sealed for example between 0.5mm and 5mm, and particularly between 1mm and 3mm Between.
The surface quality for sealing upper area 36 is greater than 100g/m2, and between 100g/m2And 4000g/m2Between, favorably Ground is between 800g/m2And 2000g/m2Between.
The surface quality of porous lower area 40 is generally between 80g/m2And 8000g/m2Between, particularly between 200g/ m2And 4000g/m2Between.
Perpendicular to surface 12 obtain porous lower area 40 thickness E I' advantageously between 2mm and 100mm, example Such as between 5mm and 50mm.
In order to embody spring performance, porous lower area 40 advantageously has the elasticity modulus greater than 5000Pa.The modulus Advantageously between 20000Pa and 100000Pa, particularly between 30000Pa and 40000Pa.
Elasticity modulus is for example published in J.Acoust. by C Langlois, R Panneton and N Atalla " quasi-static mechanics characterization of the multinomial for anisotropic material of SOC.Am.110,3032-3040 (2001) (Polynomial for quasistatic mechanical characterization of various otropic Materials the measurement of method described in article) ".
The method for manufacturing soundproofing member 10 according to the present invention is real in the device that Fig. 2 is schematically shown into Fig. 5 It is existing.
The device includes being used to prepare the platform position 60 as shown in Figure 2 of matrix 34 to deposit extra particulate shape ingredient 38 To the matrix 34 and the platform position 62 as shown in Figure 3 of absorber 18 is used to prepare depositing particulate component 24 to the suction Acceptor 18.
The device further includes for the setting of absorber 18 for being provided with particulate component 24 to be provided with extra particulate shape The formation of setting table position 64, cutting bed position 65 and spring-mass structure 14 and absorbing structure 16 on the matrix 34 of ingredient 38 With assembly or fitting table position 66.
With reference to Fig. 2, preparing platform position 60 includes for supplying the supply unit 72 of matrix 34, for shifting matrix 34 Conveyer 74, at least one sedimentation unit 76 for depositing extra particulate shape ingredient 38 and adhesive composition 42 on matrix 34, And the blending unit 78 for being admixed to extra particulate shape ingredient 38 in matrix 34.
Prepare platform position 60 additionally advantageously and include the unit 80 for initial activation adhesive composition 42.
Unit 72 for supplying matrix 34 can be formed by fiber block matrix 34 or provide in packed form it is pre- at Shape matrix 34.
Conveyer 74 can make ontology 14 advance from supply unit 72 along longitudinal axis A-A', so that ontology is in face of heavy Product unit 76, blending unit 78, activation unit 80 pass through.
Sedimentation unit 76 includes the reservoir 84 and at least one distributor 86 of extra particulate shape ingredient 38, the distribution Extra particulate shape ingredient 38 can be deposited on the upper surface 46 of matrix 36 by device 86 in the form of pantostrat.86, distributor It such as include for rolling member 88 and leading to the guiding piece 90 of the top of upper surface 46.
Blending unit 78 for example including the source 92 for generating electromagnetic field, especially generate be applied to extra particulate shape at Divide the source 92 of 38 variable electric field, so that extra particulate shape ingredient 38 is penetrated into matrix 34 with given thickness.
Advantageously, blending unit 78 further includes vibration source (not shown), in order to which extra particulate shape ingredient 38 to be admixed to In matrix 34.
Blending unit 78 for example byType machine is formed.
Activate unit 80 includes heat source herein, adhesive composition 42 can be heated to its melting temperature or more so that viscous 42 melting of synthesis point.Heat source is for example including infrared lamp.
With reference to Fig. 3, platform position 62 is prepared with the structure similar with platform position 60 is prepared.Preparing platform position 62 includes for supplying The supply unit 102 of absorber 18, is used for the deposited particles on absorber 18 at the conveyer 104 for shifting absorber 18 At least one sedimentation unit 106 of shape ingredient 24 and adhesive composition 28 and for particulate component 24 to be admixed to absorber Blending unit 108 in 18.
Prepare platform position 62 additionally advantageously and include the unit 110 for initial activation adhesive composition 42.
Supply unit 102 for supplying absorber 18, which can be formed absorber 18 by fiber block or be capable of supply that, is in The preform absorber 18 of belt-like form.
Similar with conveyer 74, conveyer 104 can make absorber 18 along longitudinal axis B-B' from supply unit 102 It advances, so that absorber 18 passes through in face of sedimentation unit 106, blending unit 108 and activation unit 110.
Sedimentation unit 106 has the structure similar with sedimentation unit 76.Sedimentation unit 106 includes particulate component 24 Reservoir 114 and at least one distributor 116, at least one distributor 116 can be in the form of pantostrats by graininess Ingredient 24 is deposited on the upper surface 32 of absorber 18.Distributor 116 is for example including rolling member 118 and leads to upper surface 32 The guiding piece 120 of top.
Blending unit 108 has the structure similar to blending unit 78.Blending unit 108 is for example including for generating electricity The source 122 in magnetic field, especially for generating the source 122 applied to the variable electric field on particulate component 24 so that graininess at 24 are divided to be penetrated into matrix 34 with given thickness.
Advantageously, blending unit 108 further includes vibration source (not shown), in order to which particulate component 24 is admixed to suction In acceptor 18.
Activate unit 110 herein include heat source, the heat source adhesive composition 28 can be heated to its melting temperature or more with Melt adhesive composition 28 at least partly.Heat source is for example including infrared lamp.
Setting table position 64 can allow for applying the lower surface 30 for being provided with the absorption 18 of particulate component 24 and be provided with 130 are stacked on the upper surface 46 of the matrix 34 of extra particulate shape ingredient 38 to be formed.
Advantageously, platform position 60 or 62 is continuously placed with the production line for felt or fabric of the invention.
Stacking 130 can be cut into the size of soundproofing member 10 to be formed by cutting bed position 65.
Assembly or fitting table position 66 includes at least one heating device (not shown) and mold 132, and the mold 132 restriction can The moulding cavity 134 realizing the forming of absorbing structure 16 and spring-mass structure 14 and its assembling simultaneously with one another.
Heating device advantageously comprises the device that can generate hot gas stream, which is intended to towards absorber 18 simultaneously It guides towards matrix 34 to pass through absorber 18 and matrix 34.
Hot gas is, for example, air.Hot gas is advantageously heated above to 120 DEG C of temperature, particularly between 120 DEG C And the temperature between 200 DEG C.
Hot gas can heat the adhesive composition 28,42 for having cut lamination 130 so that adhesive composition at least partly melts And especially allow melted material from the lower area 26 that the upper area 36 of matrix 34 is penetrated into absorber 18.
Mold 132 has at least one cooling surface 136, can allow for melted material present in stacking 130 solidifying Gu.
The surface 136 of mold 132 is for example cooled to the temperature lower than 15 DEG C, the especially temperature between 10 DEG C and 20 DEG C Degree.
The manufacturing method for manufacturing soundproofing member 10 according to the present invention will now be described.
Firstly, being unfolded by the manufacture directly in supply unit 72 or by the stock present in the supply unit 72 And matrix 34 is supplied by supply unit 72.
The matrix 34 for having the shape of a strip formula is placed on conveyer 74 continuously to face sedimentation unit 76, blending unit 78 With activation unit 80.When matrix 34 passes through in face of sedimentation unit 76, extra particulate shape ingredient 38 is delivered from reservoir 84 And it is deposited on the upper surface 46 of matrix 34 by distributor 86 and rolling member 88.
Travel speed of the amount of the extra particulate shape ingredient 38 of addition by distributor 86 according to ontology 34 on conveyer 74 It is controlled.
Then, in blending unit 78, as described above, variable electromagnetic field is applied across matrix 34 so that extra particulate Shape ingredient 38 is penetrated into the upper area 36 of matrix 34.Adhesive composition 42 also introduced simultaneously with extra particulate shape ingredient 38 or Person separates introducing with extra particulate shape ingredient 38.
Then, matrix 34 passes through in face of activation unit 80.Then, melt adhesive composition 42 at least partly, with blocking Gap between the fiber 35 and extra particulate shape ingredient 38 of matrix 34.Then, extra particulate shape ingredient 38 is mechanically connected to Fiber 35.
In addition, by the manufacture directly in supply unit 102 or passing through the stock exhibition present in the supply unit 102 It opens and supplies absorber 18 by supply unit 102.
The absorber 18 for having the shape of a strip formula is placed on conveyer 104 continuously to face sedimentation unit 106, blend list Member 108 and activation unit 110.
When absorber 18 passes through in face of sedimentation unit 106, particulate component 24 is delivered and is led to from reservoir 114 It crosses distributor 116 and rolling member 118 is deposited on the upper surface 32 of absorber 18.
Travel speed of the amount of the particulate component 24 of addition by distributor 116 according to absorber 18 on conveyer 104 It is controlled.
Then, in blending unit 108, as described above, variable electromagnetic field is applied across absorber 18 so that graininess Ingredient 24 is penetrated into the upper area 22 of absorber 18.Adhesive composition 28 also introduced simultaneously with particulate component 24 or with Components 24 separately introduce.
Then, absorber 18 passes through in face of activation unit 110.Then, adhesive composition 28 at least partly melts, will Particulate component 24 is mechanically connected to fiber 20, while keeping the open gap between fiber 20 and particulate component 24.
Then, in setting table position 64, the lower surface 30 for being provided with the absorber 18 of adhesive composition 28 is arranged to and is arranged There is the upper surface 46 of the matrix 34 of extra particulate shape ingredient 38 to contact.
The stacking 130 being consequently formed is introduced into cutting bed position 65, to be cut into the size of soundproofing member 10.
Then, after the progress in above-mentioned heating device is additionally heated, it will cut and stack 130 introducing molds 132 In moulding cavity 134.
It is closed mold 132, so as to cause to stacking 130, the especially compression to absorber 18 and matrix 34.
In this compression, adhesive composition 28 solidify and keep absorber 18 thickness be less than its be introduced into mold 132 it Preceding shared thickness.Absorber 18, which is formed with, keeps porous upper area 22 and porous lower area 26, as described above, The porous lower area 26 is less than the resistance that porous upper area passes through air to the resistance that air passes through.
Adhesive composition 42 is distributed in the gap between extra particulate shape ingredient 38 and fiber 35, to block these Gap, and prevent the upper area 36 of matrix 34 from bypassing air through.On the other hand, extra particulate shape ingredient 38 is at least partly A part of melting penetrates the porous lower area 26 of absorber 18, and the porous lower area 26 of absorber 18 is adhered to The sealing upper area 36 of matrix 34.
Then, it is again turned on mold 132.Under the action of elasticity, the porous lower area 40 of matrix 34 relative to its The thickness occupied in mold 132 increases its thickness.
The soundproofing member 10 including four regions 22,26,36,40 with different characteristics is consequently formed, wherein on porous Portion region 22 is greater than the resistance that porous lower area 26 passes through air to the resistance that air passes through, and then seals upper area 36 and porous lower area 40 there are each of afore-mentioned characteristics.
Assembling due to ontology 18,34 with make part be formed as excellent dimensions to realize in a single step, therefore sound insulation group Part 10 is formed in a simple manner.
In addition, making porous upper area 22 to air by being simple with relatively high resistance, and do not need There is provided and be assembled with resistance non-woven fabrics.Therefore, the cost of component 10 is greatly reduced.
In addition, sealing upper area 36 can be manufactured into inexpensive manner with suitable surface quality, have simultaneously Enough rigidity.
In modification, in order to further increase rigidity, in the absorber 18 for being provided with particulate component 24 and it is provided with volume Non-melt fiber based nonwoven, such as glass fibre based nonwoven are added between the matrix 34 of outer particulate component 38.
Second of manufacturing method for manufacturing soundproofing member 10 according to the present invention will now be described.
The absorber 18 made of felt or fabric from platform position 62 is cut into required size and is put by contact It sets and is heated in the warm table position that constitutes of plates by two, absorber 18 includes at an upper portion thereof particulate component 24 in region 22 And adhesive composition.
Meanwhile the matrix 34 formed by felt or fabric from platform position 60 is cut into required size and passes through contact It is placed in the second warm table position, matrix 34 has extra particulate shape ingredient 38 and adhesive composition in region 36 at an upper portion thereof.
More than the melting temperature of flat heater to adhesive composition, this causes adhesive composition to melt.In fact, upper flat Plate contacts with corresponding upper area 22 and 36 and by the entire thickness of the heat transfer of upper flat plate to upper area 22 and 36 Degree.
This leads to the melting of adhesive composition.
Then, the preformed member so cut temperature is transferred to be adjusted to lower than 30 DEG C, it is especially cold close to 15 DEG C In mold, and preformed member is placed above.
It is closed mold, this has the effect of forming part 10.
The lower area 26 that the excessive adhesive composition of upper area 36 from matrix 34 passes through absorber 18 migrates, and Therefore ensure the gluing between structure 14 and 16 after the cooling period, to allow constituent part 10.
Densify upper area 36 by the compression that mold applies in thermoforming, this, which has, seals upper area 36 Effect.
Once entire part 10 is cooling, then part 10 is removed from the molds.

Claims (17)

1. a kind of soundproofing member of motor vehicles (10), comprising:
Spring-mass structure (14)；
Absorbing structure (16) is assembled on the spring-mass structure (14)；
It is characterized in that, the absorbing structure (16) includes the absorber with the fiber (20) of multiple intertextures and/or bonding (18), the absorber (18) includes: in its thickness
* porous upper area (22) comprising the particulate component (24) dispersed between the fiber (20)；
* porous lower area (26), the particulate component not dispersed (24) or dispersion particulate component (24) it is dense Degree is less than particulate component (24) concentration of the dispersion of the porous upper area (22)；
The resistance that porous lower area (26) described in the resistance ratios that the porous upper area (22) passes through air passes through air Power greatly at least 100N.m-3.s, the porous lower area (26) is greater than 15000 N.m to the unit area impedance that air passes through-4.s。
2. component (10) according to claim 1, wherein the spring-mass structure (14) includes matrix (34), described Matrix includes the fiber (35) of multiple intertextures and/or bonding, and described matrix (34) includes: in its thickness
It seals upper area (36), there is the extra particulate shape ingredient (38) dispersed between the fiber (35) and incites somebody to action The extra particulate shape ingredient (38) is connected to the melt bonded ingredient (42) of the fiber (35)；
The extra particulate shape of poroelasticity lower area (40), the extra particulate shape ingredient (38) not dispersed or dispersion Concentration of the concentration of ingredient (38) lower than the extra particulate shape ingredient (38) of the dispersion of sealing upper area (36).
3. component (10) according to claim 2, wherein be present in described additional in sealing upper area (36) The density of particulate component (38) is greater than the close of the particulate component (24) being present in the porous upper area (22) Degree.
4. the component according to any one of Claims 2 or 3 (10), wherein the surface of sealing upper area (36) Quality is greater than 100g/m2。
5. component (10) according to claim 4, wherein it is described sealing upper area (36) surface quality between 100g/m2And 4000g/m2Between.
6. the component according to any one of Claims 2 or 3 (10), wherein the bonding of sealing upper area (36) Ingredient (42) is formed by the fusible powder that melts or by fused fiber.
7. the component according to any one of Claims 2 or 3 (10), wherein the thickness of sealing upper area (36) Less than the thickness of the poroelasticity lower area (40).
8. component (10) according to any one of claim 1 to 3, wherein the porous upper area (22) is to air By resistance be greater than 250N.m-3.s。
9. component (10) according to claim 8, wherein the porous upper area (22) is situated between to the resistance that air passes through In 250 N.m-3.s with 1500 N.m-3.s between.
10. component (10) according to any one of claim 1 to 3, wherein the thickness of the porous upper area (22) Less than 15mm.
11. component (10) according to any one of claim 1 to 3, wherein the bending of the porous lower area (26) Rigidity is greater than 0.1N.m.
12. component (10) according to any one of claim 1 to 3, wherein the absorber (18) is formed as single-piece, Described matrix (34) is formed as single-piece.
13. a kind of manufacturing method for the soundproofing member (10) for manufacturing motor vehicles comprising following steps:
* absorbing structure (16) are formed, comprising:
The absorber (18) of fibers (20) including multiple intertextures and/or bonding is provided,
Particulate component (24) are blended between the fiber (20) of the porous upper area (22) of the absorber (18)；
The particulate component (24) for keeping the porous lower area (26) of the absorber (18) not disperse or the absorption The concentration of the particulate component (24) of the dispersion of the porous lower area (26) of body (18) is less than the porous upper area (22) concentration of the particulate component (24) of dispersion；
The resistance that porous lower area (26) described in the resistance ratios that the porous upper area (22) passes through air passes through air Power greatly at least 100 N.m-3.s, the porous lower area (26) is greater than N.m to the unit area impedance that air passes through-4.s；
* the absorbing structure (16) and spring-mass structure (14) are fitted together.
14. according to the method for claim 13 comprising the step of forming spring-mass structure (14), comprising:
The matrix (34) of fibers (35) including multiple intertextures and/or bonding is provided；
Blended between the fiber (35) of the upper area of described matrix (34) the extra particulate shape ingredient (38) of dispersion with And adhesive composition (42),
Keep poroelasticity lower area (40) extra particulate shape ingredient (38) or the poroelasticity lower part without dispersion The concentration of the extra particulate shape ingredient (38) of the dispersion in region (40) be less than the upper area dispersion extra particulate shape at Divide the concentration of (38)；
It at least partly melts the adhesive composition (42) and seals upper area (36) to be formed.
15. according to the method for claim 13 comprising described will be provided between admixing step and melting step The absorber (18) setting of components (24) is being provided with the extra particulate shape ingredient (38) and connection ingredient (42) Described matrix (34) on, the melting step includes heating to be provided with the absorber of the particulate component (24) simultaneously (18) and be provided with the extra particulate shape ingredient (38) and it is described connection ingredient (42) described matrix (34).
16. according to the method for claim 14, wherein assembling steps heat be provided with the particulate component at the same time (24) the absorber (18) and it is provided with the described of the extra particulate shape ingredient (38) and connection ingredient (42) Matrix (34) is implemented afterwards, the assembling steps include will be provided with the particulate component (24) the absorber (18) and Described matrix (34) joint for being provided with the extra particulate shape ingredient (38) and connection ingredient (42) introduces mold (132) Cavity (134) in and make the absorbing structure (16) and the spring-mass structure (14) in the institute of the mold (132) State thermoforming in cavity (134).
17. method described in any one of 3 to 16 according to claim 1, wherein assembling includes by making at least partly to melt Adhesive composition (42) is penetrated into the lower region of the absorber (18) from the upper area (36) of described matrix (34) The upper area (36) of described matrix (34) is fixed on to the lower area of the absorber (18) in domain (26) (26) on.
CN201910222298.3A 2018-03-22 2019-03-22 Sound insulation assembly for a motor vehicle and associated manufacturing method Active CN110293916B (en)

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FR1852463A FR3079181B1 (en) 2018-03-22 2018-03-22 MOTOR VEHICLE SOUNDPROOFING ASSEMBLY AND MANUFACTURING METHOD THEREOF
FR1852463 2018-03-22

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FR3079181A1 (en) 2019-09-27
DE102019107230A1 (en) 2019-09-26
FR3079181B1 (en) 2020-04-24

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