SE507286C2 - Self-supporting, heat and sound-absorbing lining for internal combustion engines for motor vehicles - Google Patents

Self-supporting, heat and sound-absorbing lining for internal combustion engines for motor vehicles

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Publication number
SE507286C2
SE507286C2 SE9300884A SE9300884A SE507286C2 SE 507286 C2 SE507286 C2 SE 507286C2 SE 9300884 A SE9300884 A SE 9300884A SE 9300884 A SE9300884 A SE 9300884A SE 507286 C2 SE507286 C2 SE 507286C2
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SE
Sweden
Prior art keywords
layer
cladding
absorbent
heat
volume
Prior art date
Application number
SE9300884A
Other languages
Swedish (sv)
Other versions
SE9300884D0 (en
SE9300884L (en
Inventor
Helmut Stober
Original Assignee
Daimler Benz Ag
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Publication date
Application filed by Daimler Benz Ag filed Critical Daimler Benz Ag
Publication of SE9300884D0 publication Critical patent/SE9300884D0/en
Publication of SE9300884L publication Critical patent/SE9300884L/en
Publication of SE507286C2 publication Critical patent/SE507286C2/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • 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
    • B32B5/02—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
    • B32B5/022—Non-woven fabric
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0246—Acrylic resin fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • 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
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Exhaust Silencers (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Thermal Insulation (AREA)

Abstract

A self-supporting, heat and sound insulating cowling for internal-combustion engines of motor vehicles comprises a plurality of layers which have been compression-moulded under the effect of pressure and heat to form zones of defined- predetermined compaction. The cowling comprises, on the engine side, a thicker, heat insulating and sound insulating layer (2) of an inorganic fibrous material, which is covered by a layer (4) of carbon-fibre material. A thicker layer (3) of inorganic fibrous material, facing away from the engine, cures to form a self-supporting support layer. 25 to 35% by volume of it consists of 25 to 50 mm long glass fibres and the rest consists of either a high temperature resistant polyester resin and mineral filler or polypropylene. This support layer may be covered on the bodywork side by a layer (5) of non-woven polyester or polyacrylonitrile fibres. <IMAGE>

Description

507 286 2 den just skildrade eftergivliga absorptionsformkroppen bildad självbärande beklädnad skulle alltså bli relativt dyr. The self-supporting cladding formed just described by the resilient absorbent shaped body would thus be relatively expensive.

Uppfinningen avser nu att åstadkomma en vidareutveckling av den inledningsvis nämnda beklädnaden på sådant sätt att med bibe- hållande av den ljud- och värmedämpande verkan liksom den själv- bärande egenskapen kan beklädnaden göras lättare att framställa och montera. Detta uppnås nu enligt uppfinningen i huvudsak genom de i den kännetecknande delen av patentkravet 1 angivna särdragen.The invention now intends to bring about a further development of the initially mentioned cladding in such a way that while maintaining the sound and heat-absorbing effect as well as the self-supporting property, the cladding can be made easier to manufacture and assemble. This is now achieved according to the invention mainly by the features stated in the characterizing part of claim 1.

Tack vare den särskilda sammansättningen av materialen till bärarskiktet kan detta tillsammans med de övriga absorptionsverk- samma fiberdukskíkten i ett enhetligt pressformningsförlopp formas till ett enhetligt formstabilt arbetsstycke, alltså till en enhet- lig självbärande beklädnad, varigenom icke endast framställningen av beklädnaden utan också dennas montering blir väsentligt enklare och billigare. Genom den olikartade sammansättningen av de enskilda skikten uppnås trots de för alla skikten lika trycken och tempera- turerna en olikartad egenskap hos skiktet. Fiberdukskikten förblir för den erforderliga absorptionsverkan tillräckligt porösa medan däremot bärarskiktet bli porfritt, hårt och stelt. Av de bägge i den kännetecknande delen av patentkravet 1 angivna alternativen till bärarskiktet är utformningen enligt alternativet a) avsedd för höga temperaturpåkänningær av bärarskiktet upp till exempelvis 500°C, medan däremot utformningen av bärarskiktet i enlighet med alternativet b) är tänkt för fall med lägre temperaturpåkänning, t ex upp till omkring 200°C och/eller kraven på god ljuddämpning.Thanks to the special composition of the materials for the carrier layer, this, together with the other absorbent nonwoven layers, can be formed in a uniform press-forming process into a uniform dimensionally stable workpiece, i.e. into a uniform self-supporting cladding, whereby not only the production of the cladding but also its assembly significantly simpler and cheaper. Due to the different composition of the individual layers, despite the pressures and temperatures being the same for all layers, a different property of the layer is achieved. The nonwoven layers remain sufficiently porous for the required absorption effect, while the carrier layer, on the other hand, becomes pore-free, hard and rigid. Of the two alternatives to the carrier layer specified in the characterizing part of claim 1, the design according to alternative a) is intended for high temperature stresses of the carrier layer up to, for example, 500 ° C, while on the other hand the design of the carrier layer according to alternative b) is intended for cases with lower temperature stress, eg up to about 200 ° C and / or the requirements for good sound attenuation.

Uppfinningen beskrivs närmare nedan under hänvisning till bifogade ritning, på vilken fig 1 visar en partiell tvärsektion genom ett första utförandeexempel på en i ett stycke utförd själv- bärande beklädnadsdel och fig 2 visar en partiell tvärsektion genom ett andra utföringsexempel på en beklädnadsdel.The invention is described in more detail below with reference to the accompanying drawing, in which Fig. 1 shows a partial cross-section through a first embodiment of a one-piece self-supporting cladding part and Fig. 2 shows a partial cross-section through a second exemplary embodiment of a cladding part.

Fig 1 visar den självbärande och mer värmehållfasta bekläd- naden 1 med ett av ett fiberdukskikt av oorganiska fibrer formpres- sat absorptionsskikt 2 och ett av glasfiber, mineralfyllmedel och bindemedel bestående och tillsammans med absorptionsskiktet 2 formpressat och därvid porfritt komprimerat och genomhärdat bärar- skikt 3. Det värmebeständiga absorptionsskiktet, 2 består till största delen, exempelvis till 94 volyms-%, av stenfibrer, särskilt basaltull, som är försatt med ett ett bindemedel, t ex 6 volyms-% fenolhartsbindemedel. Tack vare den relativt låga bindemedelsan- ,5Û7 286 3 delen i absorptionsskiktet förblir detta, bortsett från kantzonerna med extremt högt yttryck, poröst också efter det gemensamma varm- pressningsförloppet och uppvisar på grund av detta en god värmeiso- lerande och ljuddämpande verkan. I bärarskiktet 3 är fiberandelen däremot väsentligt mindre än i absorptionsskiktet 2. Särskilt består bärarskiktet endast av 1/4 upp till ungefär 1/3 av oorga- niska fibrer, särskilt glasfibrer. Den kvarstående större resten av bärarskiktbeståndsdelar består till övervägande del av oorga- niskt fyllmedel och i övrigt av hartsbindemedel. För att genom varmpressningsformningen av beklädnadsdelen åstadkomma ett stabilt, genomhärdat och värmebeständigt bärarskikt 3 används som bindemedel ett högtemperaturbeständigt polyesterharts, Som mineralfyllmedel för bärarskiktet har kvartssand visat sig vara särskilt lämpligt.Fig. 1 shows the self-supporting and more heat-resistant cladding 1 with an absorption layer 2 molded from a nonwoven fabric layer of inorganic fibers and one consisting of glass fiber, mineral fillers and binders and together with the absorption layer 2 molded and thereby pore-free compressed and hardened carrier layer 3 The heat-resistant absorption layer 2 consists for the most part, for example to 94% by volume, of rock fibers, in particular basaltic wool, which is added with a binder, for example 6% by volume of phenolic resin binder. Due to the relatively low binder content in the absorption layer, this remains, apart from the edge zones with extremely high surface pressure, porous even after the common hot pressing process and therefore has a good heat-insulating and sound-absorbing effect. In the carrier layer 3, on the other hand, the proportion of fibers is substantially smaller than in the absorption layer 2. In particular, the carrier layer consists of only 1/4 up to approximately 1/3 of inorganic fibers, in particular glass fibers. The remaining major residue of carrier layer constituents consists predominantly of inorganic filler and otherwise of resin binder. In order to obtain a stable, hardened and heat-resistant carrier layer 3 by hot-pressing the cladding part of the cladding part, a high-temperature-resistant polyester resin is used as binder. Quartz sand has proved to be particularly suitable as mineral filler for the carrier layer.

Det i riktning mot motorn vända absorptionsskiktet 2 är försett med ett täckskikt 4 av kolfiber. Detta täckskikt har företrädesvis en tjocklek av mellan 1 och 2 mm och en ytvikt av mellan 100 och 150 g/mz. Utåt är bärarskiktet 3 vid det visade utföringsexemplet av optiska skäl dessutom försett med ett täck- skikt 5 med en skikttjocklek av ungefär 1 mm och en ytvikt av mellan 100 och 150 g/mz, som består av en polyesterfiberduk eller av polyakrylnitrilfibrer. Detta täckskikt kan också vara förbundet med ytan på bärarskiktet 3 medelst en mellanlagd smältlimsfolie.The absorption layer 2 facing the engine is provided with a cover layer 4 of carbon fiber. This cover layer preferably has a thickness of between 1 and 2 mm and a basis weight of between 100 and 150 g / m 2. Outwardly, the carrier layer 3 in the embodiment shown is for optical reasons also provided with a cover layer 5 with a layer thickness of approximately 1 mm and a basis weight of between 100 and 150 g / m 2, which consists of a polyester nonwoven fabric or of polyacrylonitrile fibers. This cover layer can also be connected to the surface of the carrier layer 3 by means of an intermediate hot-melt adhesive foil.

Bärarskiktet 3 har kantzoner 6, som har särskilt hög täthet och därmed också en hög mekanisk stabilitet. Särskilt är också i detta område fibrerna i absorptionsskiktet komprimerade till por- frihet på grund av en lämplig formgivning av formpressverktyget.The carrier layer 3 has edge zones 6, which have a particularly high density and thus also a high mechanical stability. In this area in particular, the fibers in the absorption layer are also compressed to pore freedom due to a suitable design of the compression molding tool.

Detta uppnås dels genom en lämplig formgivning av formpressnings- verktyget och ett motsvarande högt presstryck i kantzonerna.This is achieved in part by a suitable design of the compression tool and a correspondingly high pressing pressure in the edge zones.

Dessutom kan in kantzonerna också bindemedelsandel avsiktligt ökas lokalt genom påsprutning av bindemedelsharts. I dessa kantzoner kan utstansas de för anbringandet av beklädnaden i motorfordonet erfor- derliga öppningarna, t ex genomgångshål för skruvar.In addition, in the edge zones, the proportion of binder can also be intentionally increased locally by spraying binder resin. In these edge zones, the openings required for fitting the cladding in the motor vehicle, such as through holes for screws, can be punched out.

Formkroppen framställs i ett arbetssteg. Först inläggs i den undre hälften av ett öppnat formpressningsverktyg den till en för- tillverkad f iberduk sammanförda materialblandningen för bärarskik- tet 3 och sedan påläggs det likaså i fiberdukform iordningställda materialet för absorptionsskiktet 2 . På absorptionsmaterialet läggs ytterligare en kolfiberduk. Därefter. stängs det sålunda fyllda formpressningsverktyget och sammanpressas under värmepåverkan, 507 286 4 varigenom beklädnaden får sin form och materialet i bärarskiktet komprimeras till porfrihet och sammanpressas till ett genomhärdat självbärande skikt till en tjocklek av mellan 1 och 5 mm. Tjock- leken av bärarskiktet uppgår efter pressningsförloppet i mitten av formkroppen normalt till mellan 3 och 5 mm och avtar i riktning mot kantskikten till omkring ungefär 1 mm. Vid pressningsförloppet sammanpressas detta materialskikt beroende på utformningen av beklädnaden till ett skikt av omkring 50 mm tjocklek i mitten av formkroppen och ned till ca 5 mm i kantzonerna, vid en ytvikt av mellan 1500 och 3000 kg/m2. Då bärarskiktet 3 och absorptionsskik- tet 2 innehåller i fibrerna dispergerat bindemedel leder detta vid varmpressformningen av beklädnaden till en god sammanhållning mellan de olika skikten.The shaped body is produced in one working step. First, in the lower half of an opened compression molding tool, the material mixture for the carrier layer 3 brought together into a prefabricated nonwoven fabric is applied, and then the material for the absorbent layer 2, which is also prepared in nonwoven fabric form, is applied. An additional carbon fiber cloth is laid on the absorption material. Then. the thus-filled compression tool is closed and compressed under the influence of heat, whereby the cladding takes its shape and the material in the carrier layer is compressed to pore freedom and compressed into a hardened self-supporting layer to a thickness of between 1 and 5 mm. After the pressing process in the middle of the shaped body, the thickness of the carrier layer normally amounts to between 3 and 5 mm and decreases in the direction of the edge layers to about 1 mm. During the pressing process, this material layer is compressed depending on the design of the cladding to a layer of about 50 mm thickness in the middle of the mold body and down to about 5 mm in the edge zones, at a basis weight of between 1500 and 3000 kg / m2. As the carrier layer 3 and the absorption layer 2 contain binder dispersed in the fibers, this leads to a good cohesion between the different layers during the hot-pressing molding of the covering.

Den i fig 2 partiellt i tvärsektion visade beklädnaden 1' är framför allt avsedd för en värmepåkänning av upp till högst 200 till 220°C. Den skiljer sig från det mer värmebeständiga utförings- exemplet enligt fig 1 framför allt genom sammansättningen av ab- sorptionsskiktet 2' och bärarskiktet 3'. Närmare bestämt är bärar- skiktet här praktiskt taget utfört som en i beklädnaden integrerad, fiberförstärkt polypropenformkropp, som till ungefär 1/4 består av organiska fibrer med en längd av mellan omkring 25-50 mm, exempel- vis av glas- eller basaltfiber, och för övrigt av polypropen. Ab- sorptionsskiktet 2' bildas till ungefär 3/4 av plast- och/eller textilfiber och återstoden av fenolharts som bindemedel. De bägge täckskikten 4 och 5 är utformade lika med de vid exemplet enligt fig 1. Det är utan vidare tänkbart att bägge de alternativa utfö- ringsformerna av absorptionsskiktet kan vara anordnade i en och samma beklädnad, nämligen vid ställena för en högre och klart över 200°C gående värmepåkänning, t ex i närheten av avgasröret, där en fiberduk av oorganiska fibrer påläggs och i de övriga, mindre starkt värmepåkända områdena påläggs en fiberduk av plast- eller textilfibrer.The cladding 1 'shown partially in cross section in Fig. 2 is primarily intended for a heat stress of up to a maximum of 200 to 220 ° C. It differs from the more heat-resistant embodiment according to Fig. 1 mainly by the composition of the absorption layer 2 'and the carrier layer 3'. More specifically, the carrier layer is practically designed here as a fiber-reinforced polypropylene molded body integrated in the cladding, which to about 1/4 consists of organic fibers with a length of between about 25-50 mm, for example of glass or basalt fiber, and otherwise of polypropylene. The absorbent layer 2 'is formed into about 3/4 of plastic and / or textile fiber and the remainder of phenolic resin as a binder. The two cover layers 4 and 5 are designed similar to those in the example according to Fig. 1. It is readily conceivable that both the alternative embodiments of the absorption layer can be arranged in one and the same covering, namely at the places of a higher and clearly over 200 ° C thermal stress, for example in the vicinity of the exhaust pipe, where a nonwoven fabric of inorganic fibers is applied and in the other, less strongly heat-stressed areas, a nonwoven fabric of plastic or textile fibers is applied.

De fördelar som kan uppnås med den enligt uppfinningen utförda självbärande och i ett stycke utformade beklädnaden ligger särskilt i den prismässigt gynnsamma framställningen och monteringen av beklädnaden samt i en god ljuddämpande verkan och, vid den mer värmebeständiga utformningen enligt fig 1, den utomordentligt höga värmebeständigheten. Beklädnaden kan anbringas i alla motorfordon, både i personbilar och i lastbilar, icke endast i fordonets motor- 507 286 5 rum utan också i lämplig utformning överallt där värmekällor finns i fordonet som måste avskärmas, t ex vid avgasrör, turboladdare och så vidare.The advantages that can be achieved with the self-supporting and one-piece cladding made according to the invention lie in particular in the price-favorable production and assembly of the cladding and in a good sound-absorbing effect and, in the more heat-resistant design according to Fig. 1, the extremely high heat resistance. The cladding can be applied in all motor vehicles, both in cars and in lorries, not only in the engine compartment of the vehicle but also in a suitable design wherever there are heat sources in the vehicle that must be shielded, eg by exhaust pipes, turbochargers and so on.

Claims (6)

5Û7 286 6 P a t een t k r a v5Û7 286 6 P a t een t k r a v 1. Självbärande, värme- och ljuddämpande beklädnad för förbrän- ningsmotorer till motorfordon och bestående av en mot motorn vänd och inuti beklädnaden anordnad samt av ett fiberdukskikt bildad absorptionsformkropp och av en vid den från motorn vända sidan inuti beklädnaden anordnad och till formen av absorptionsformkrop- pen i dess avsedda form och inbyggnadsläge stabiliserande bärar- skål, varvid fiberdukskiktet i absorptionsformkroppen sammanpres- sats under utformning av zoner med avsiktligt förutbestämd samman- pressning och det absorptionsskikt i absorptionsformkroppen som är avsett att absorbera ljud och avskärma värmet från motorn innehål- ler oorganiska fibrer, k ä n n e t e c k n a d a v att bärar- skålen är konstruktionsmässigt integrerad med absorptionsformkrop- pen till en enda formpressdetalj genom att på den från motorn vända sidan av det absorptionsverksamma fiberdukskiktet i beklädnaden är anordnat ett till största delen porfritt och ungefär mellan 1 och 5 mm tjockt bärarskikt (3), som tillsammans med det absorptions- verksamma fiberdukskiktet i beklädnaden är hoppressbart till en enhetlig formkropp och som till mellan 25 och 35 volyms-% består av 25-50 mm långa glasfibrer och i övrigt av antingen a) 25-35 volyms-% av ett högtemperaturbeständigt polyesterharts och 35-45 volyms-% mineralfyllmedel eller b) 65-75 volyms-% polypropen.Self-supporting, heat- and sound-absorbing cladding for internal combustion engines for motor vehicles and consisting of an engine-facing body arranged inside the cladding and formed by a non-woven fabric layer and of an interior-shaped body arranged on the side facing the engine and in the shape of an absorption molding pen in its intended shape and positioning position stabilizing carrier bowl, the nonwoven layer in the absorbent mold being compressed to form zones of intentionally predetermined compression and the absorbent layer in the absorbent mold intended to absorb sound and shield the heat from inorganic fibers. characterized in that the carrier bowl is structurally integrated with the absorbent mold body into a single mold press part by arranging on the side facing away from the engine the absorbent nonwoven fabric layer in the cladding a substantially pore-free and approximately between 1 and 5 mm thick layer (3), which together with the absorbent-effective nonwoven fabric layer in the cladding is compressible into a uniform shaped body and which consists of between 25 and 35% by volume of 25-50 mm long glass fibers and otherwise of either a) 25-35 volumes -% of a high temperature resistant polyester resin and 35-45% by volume of mineral filler or b) 65-75% by volume of polypropylene. 2. Beklädnad enligt patentkravet 1, alternativ a), k ä n n e - t e c k n a d a v att mineralfyllmedlet för bärarskiktet (3) innehåller kvartssand.Cladding according to claim 1, alternative a), characterized in that the mineral filler for the carrier layer (3) contains quartz sand. 3. Beklädnad enligt patentkravet 1, särskilt enligt dettas alternativ a), k ä n n e t e c k n a d a v att det absorptions- verksamma fiberdukskiktet i beklädnaden innehåller ungefär 85-96 volyms-% och företrädesvis ungefär 94 volyms-% basaltull och återstoden fenolhartsbindemedel.Cladding according to claim 1, in particular according to its alternative a), characterized in that the absorbent effective nonwoven fabric layer in the cladding contains about 85-96% by volume and preferably about 94% by volume basalt and the remaining phenolic resin binder. 4. Beklädnad enligt patentkravet 1, särskilt enligt dettas alternativ a), k ä n n e t e c k n a d a v att det absorptions- verksamma fiberdukskiktet i beklädnaden på sin mot motorrummet vända yta är försett med ett av kolfibermaterial bestående täck- skikt (4).Cladding according to claim 1, in particular according to its alternative a), characterized in that the absorbent fibrous layer in the cladding on its surface facing the engine compartment is provided with a cover layer consisting of carbon fiber material (4). 5. Beklädnad enligt patentkravet _1, särskilt enligt dettas alternativ b), k ä n n e t e c k n a d a v att det absorptions- 507 286 7 verksamma fiberdukskiktet i beklädnaden är sammansatt av omkring 70-80 volyms-äs och företrädesvis ungefär 75 volyms-â; plast- och/eller textilfibrer och återstoden fenolhartsbindemedel.Cladding according to claim 1, in particular according to its alternative b), characterized in that the absorbent-effective nonwoven fabric layer in the cladding is composed of about 70-80 volumes and preferably about 75 volumes; plastic and / or textile fibers and the remainder phenolic resin binder. 6. Beklädnad enligt patentkravet 1, k ä n n e t e c k n a d a v att den fria ytan på bärarskiktet (3) är försedd med ett mellan 0,5 och 2 mm tjockt täckskikt (5) av bomullsfiber, polyesterfiber eller po lyakrylnitrilf iber .Cladding according to claim 1, characterized in that the free surface of the carrier layer (3) is provided with a cover layer (5) of cotton fiber, polyester fiber or polyacrylonitrile fiber between 0.5 and 2 mm thick.
SE9300884A 1992-04-04 1993-03-17 Self-supporting, heat and sound-absorbing lining for internal combustion engines for motor vehicles SE507286C2 (en)

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DE4211409A DE4211409A1 (en) 1992-04-04 1992-04-04 Self-supporting, heat and sound-insulating cladding for internal combustion engines of motor vehicles

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Also Published As

Publication number Publication date
FR2689935A1 (en) 1993-10-15
ITRM930165A0 (en) 1993-03-17
GB9306047D0 (en) 1993-05-12
IT1261418B (en) 1996-05-23
ITRM930165A1 (en) 1994-09-17
SE9300884D0 (en) 1993-03-17
GB2265569A (en) 1993-10-06
SE9300884L (en) 1993-10-05
FR2689935B1 (en) 1994-10-07
DE4211409A1 (en) 1993-10-07
GB2265569B (en) 1995-05-10

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