EP0752978A1 - Pieces moulees thermo-isolantes - Google Patents

Pieces moulees thermo-isolantes

Info

Publication number
EP0752978A1
EP0752978A1 EP95908284A EP95908284A EP0752978A1 EP 0752978 A1 EP0752978 A1 EP 0752978A1 EP 95908284 A EP95908284 A EP 95908284A EP 95908284 A EP95908284 A EP 95908284A EP 0752978 A1 EP0752978 A1 EP 0752978A1
Authority
EP
European Patent Office
Prior art keywords
molded parts
parts according
fibers
molding
thermal insulation
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Withdrawn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
EP95908284A
Other languages
German (de)
English (en)
Inventor
Wilhelm Kullen
Olaf Schmenkel
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.)
ElringKlinger AG
Original Assignee
ElringKlinger 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 ElringKlinger AG filed Critical ElringKlinger AG
Publication of EP0752978A1 publication Critical patent/EP0752978A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K21/00—Fireproofing materials
    • C09K21/02—Inorganic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0876—Insulating elements, e.g. for sound insulation for mounting around heat sources, e.g. exhaust pipes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the invention relates to thermal insulation molded parts for motor vehicles with internal combustion engines, in particular for the thermal insulation of exhaust gas-carrying components in the engine compartment and in the area of the exhaust system.
  • thermal insulation molded parts for motor vehicles with internal combustion engines are based on sheet metal parts made of steel or aluminum, which serve as carrier material and give the molded part the necessary strength.
  • the sheet metal parts are glued or clamped with glass fiber fabric, steel wool, aluminum wool etc.
  • the sheet metal parts also function as a fastening part.
  • the sheet metal parts are generally produced by means of a forming or deep-drawing process, which is more complex the more complicated the shape of the sheet metal parts or the heat-insulating molded parts themselves is.
  • the object of the invention is to propose a new type of heat-insulating molded parts which can be manufactured more easily and more cost-effectively.
  • This object is achieved by heat-insulating molded parts which are produced using a curable molding compound which comprises a high-temperature-resistant binder, a particulate component of a pore-containing material and a fibrous or needle-shaped reinforcing component.
  • thermal insulation molded parts can be produced without problems as self-supporting molded parts.
  • the heat-insulating molded parts according to the invention are preferably at most less compressible, more preferably essentially incompressible.
  • the binder will preferably comprise an inorganic reaction mixture forming a ceramic matrix, since moldings of this type can later be easily disposed of with household waste or - as will be described further below - can be recycled in the course of the production of new heat insulation molded parts.
  • the use of a purely inorganic formulation also ensures very environmentally friendly production.
  • Inorganic reaction mixtures which are cold-curing are preferably used, since the tools for such molding compositions can be produced from plastic or wood. This means that expensive production of metal casting molds can be avoided.
  • the molded parts are preferably produced essentially free of organic components.
  • binder systems are described in DE 40 40 180 AI.
  • the molding compositions described there - with or without foaming agents - are not suitable as molding compositions for the present invention, since the molded parts produced in this way do not withstand the mechanical stresses in the motor vehicle, but it has surprisingly been found that the molding compositions according to DE 40 40 180 are good are suitable as a binder system for the present invention.
  • a preferred inorganic reaction mixture contains water glass, potassium hydroxide solution and furnace filter dust from the production of corundum. This dust arises when bauxite is melted in large furnaces. At temperatures of approx. 2,200 ° C, fine particles as well as evaporated and condensed material are whirled up due to the resulting thermals. This dust is then collected in the suction filters.
  • the chemical composition depending on the raw material (bauxite) used, is approximately
  • the grain size varies in large ranges from about 0.1 ⁇ m to 200 ⁇ m.
  • the curing time can be set in wide ranges, for example between 5 seconds and 1 hour, by metering in the potassium hydroxide solution. This creates the possibility of optimally adapting the curing time to the existing manufacturing options.
  • Sodium water glass is preferably used as the water glass, since this is not only cheaper than potassium water glass, but also offers the advantage that the ceramic matrix formed has a higher mechanical strength and greater temperature resistance.
  • the self-curing inorganic reaction mixture which forms a ceramic material, is particularly preferred because it forms a matrix which has a comparable strength to sintered ceramic.
  • a warm hardening can be carried out at approximately 70-80 ° C.
  • the particulate component made of porous material, except that it has the lowest possible thermal conductivity.
  • the particulate component need not have any particular mechanical strength, in particular no great compressive strength, and the particulate component also does not require high thermal stability.
  • particulate, pore-containing materials which can also withstand the high-temperature conditions in the engine compartment or along the exhaust system
  • hollow glass spheres, expanded glass, Ver ikulite and / or pearlite being preferred here.
  • expanded glass instead of hollow glass spheres poses no problems, since the closed-pore structure of the hollow glass spheres is not necessary for the particulate, pore-containing component and the open-pore structure of the expanded glass particles does not have a disruptive effect in view of the normally set toughness of the molding composition .
  • Expanded glass is also much cheaper than glass hollow spheres. Vermiculite and pearlite particles are preferred materials because of their very low density, with vermiculite due to its layer structure also from the point of view of a improved acoustic insulation effect can be selected as a particulate component.
  • the possibility is used as a side effect to produce the molded parts with a relatively low specific density, which is preferably ⁇ 2 g / cm ⁇ , more preferably ⁇ 1.5 g / cm3 . Moldings with such a low specific density can be used for thermal insulation on a large scale without causing weight problems in automobile construction.
  • a wide range of reinforcing materials is also available for the reinforcing component, with fibrous reinforcing components not only meaning individual fibers, but also non-woven fabrics, fiber fabrics, knitted fabrics or the like.
  • the needle-shaped reinforcement components are also to be understood as needle fleece or the like.
  • the needle-shaped or fibrous reinforcing component is preferably mixed into the molding composition in the form of individual fibers or individual needles. Needle-shaped wollastonite, glass fibers, mineral fibers, mineral wool and / or metal fibers have proven to be particularly suitable.
  • the needles or fibers of the reinforcing component should preferably have a length in the range from approximately 50 to approximately 200 ⁇ m.
  • the lower limit of approx. 50 ⁇ m results from the fact that no reinforcing effect is achieved with significantly shorter fibers, while mixing of the molding compound becomes problematic with fibers with a significantly greater length than 200 ⁇ m and breakage of the long fibers the production of the molding compound is to be feared.
  • An exception here are glass and metal fibers, which can be up to approx. 15 mm long.
  • the molding composition may optionally contain, for example, a filler which can either be used to improve the properties of the molded parts or simply to reduce the cost of the molding composition material.
  • Talcum powder is a preferred filler, for example, because its platelet structure improves the elasticity of the hardened molding material.
  • Mica can also be used as a filler and is valued for its high heat resistance.
  • a particularly cheap filler is lime, which is used in particular as a substitute for stretching the molding compound.
  • hardened and comminuted molding material itself is also suitable as fillers for newly manufactured molded parts. In this way, used molded parts can be completely reused and do not have to be disposed of with the waste.
  • the molding composition may also contain inorganic pigments, in particular in the form of metal oxides, such as Iron oxides, chromium oxides, etc.
  • the viscosity of the molding compound is - regardless of the type of used binder - preferably adjusted to a viscosity of ⁇ 150 Pas. This not only permits good processing of the molding compound, but also permits gentle mixing of the fibrous or needle-shaped reinforcing materials.
  • thermal insulation molded parts according to the invention are, on the one hand, that they do not have a supporting structure, e.g. Sheet metal parts, need and can be produced in almost any configuration using easily produced shapes. Compared to the previous thermal insulation parts based on sheet metal parts, a much better, i.e. achieved in particular a smoother surface, and all design options are available to enhance the visual appearance. Since the car manufacturers place increasing value on an appealing design of the engine compartment, there is an essential advantage of the thermal insulation molded parts according to the invention over those known from the prior art. It is also very easy to make the molded part surface acoustically favorable, for example by means of a waffle or honeycomb structure.
  • the material that can be used for the production of the thermal insulation molded parts according to the invention is less expensive than for the molded parts according to the prior art, and since the complicated manufacture of formed or deep-drawn sheet metal parts is eliminated, there is also a much more economical manufacture, in particular also because of this, because easily producible plastic and wooden tools are suitable for producing the molded parts.
  • the particulate, pore-containing material essentially serves only to improve the thermal insulation, and in many cases it may already be sufficient if the particulate, pore-containing material forms cavities in the matrix during the solidification and curing of the molding compound and keeps it free while the fate of the particulate, pore-containing material when the thermal insulation molded parts are used in the motor vehicle during the operating period is of lesser importance, since due to the strength of the matrix, the cavities necessary for the thermal insulation are also retained when the particulate , porous material changes over time or should even burn out from the molded parts.
  • any other pore-containing material can be used which remains stable until the molding compound has cured and thus ensures the formation of pore-shaped cavities in the molding compound matrix.
  • the heat-insulating molded parts can contain molded-in or embedded fastening means which serve to fasten the heat-insulating part as a shield in the engine area or exhaust gas area of the motor vehicle.
  • Fastening parts can in particular be metal parts with an incorporated thread.
  • the thermal insulation parts can have a coating that can be formed by a metallic material or by lacquers.
  • the coating has the function of improving the radiation reflection on the inside in order to lead to even better thermal insulation by the thermal insulation part.
  • Particularly preferred molded thermal insulation parts comprise the reinforcing component in the form of a fiber mat.
  • the fiber mat is impregnated with a residual molding compound and, if necessary, shaped before curing.
  • the residual molding compound does not necessarily contain more reinforcing fibers or needles, but it does contain the remaining constituents defined at the outset, such as binders and the pore-containing material.
  • the figure shows a detail of a sectional view of a thermal insulation component 10 according to the invention, which consists of a with a molding compound impregnated fiber mat 12 according to the invention.
  • a high-temperature-resistant fiber mat (temperature-resistant up to approx. 800 to 1,000 ° C.) made of mineral wool was used as the fiber mat 12, which was briefly immersed in a very low-viscosity formulation for the molding composition.
  • the binder could be applied on one or both sides in a viscous formulation.
  • the "wet" fiber mat produced in this way was pressed into a desired contour using a mold. Since the mat is very flexible due to the impregnation with the molding compound, the simplest shapes and the lowest pressures are sufficient.
  • the ceramic binder hardens in a few minutes at ambient temperature, and the finished molded part can be removed from the mold.
  • the surface can be refined to improve radiation shielding.
  • the advantages of the invention in general lie in particular in the freedom of design in the shaping of the insulation components, in their extremely high strength, their low weight, in particular when using fiber mats as reinforcement and / or carrier material for the molding composition to be used, and high temperature resistance, good thermal insulation properties and good acoustic insulation properties.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Silencers (AREA)

Abstract

L'invention concerne des pièces moulées thermo-isolantes destinées à des véhicules à moteur à combustion interne. Ces pièces peuvent être utilisées en particulier pour assurer l'isolation thermique de composants transportant les gaz d'échappement au niveau du dispositif d'échappement ainsi que dans le compartiment moteur. Il est possible de réduire le coût de fabrication et la complexité de ces pièces moulées en utilisant une matière moulable durcissable, contenant un liant résistant aux températures élevées, un constituant particulaire constitué d'un matériau poreux ainsi qu'un matériau de renfort fibreux ou aciculaire.
EP95908284A 1994-03-31 1995-02-16 Pieces moulees thermo-isolantes Withdrawn EP0752978A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19944411436 DE4411436A1 (de) 1994-03-31 1994-03-31 Wärmedämmformteile
DE4411436 1994-03-31
PCT/EP1995/000561 WO1995026938A1 (fr) 1994-03-31 1995-02-16 Pieces moulees thermo-isolantes

Publications (1)

Publication Number Publication Date
EP0752978A1 true EP0752978A1 (fr) 1997-01-15

Family

ID=6514476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95908284A Withdrawn EP0752978A1 (fr) 1994-03-31 1995-02-16 Pieces moulees thermo-isolantes

Country Status (3)

Country Link
EP (1) EP0752978A1 (fr)
DE (1) DE4411436A1 (fr)
WO (1) WO1995026938A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536124A1 (de) * 1995-09-28 1997-04-03 Elringklinger Gmbh Abgaskrümmer
DE29517693U1 (de) * 1995-11-08 1995-12-21 Fritz Eichenauer GmbH & Co. KG Fabrik elektr. Spezialartikel, 76870 Kandel Reflexions- und Wärmedämmteil als Hitzeschild, vorzugsweise zum Einbau in Kraftfahrzeugen
DE19627035C2 (de) * 1996-07-05 1998-07-16 Elringklinger Gmbh Abgas-Rückführvorrichtung
DE10029869C2 (de) * 2000-06-16 2003-10-30 Rex Ind Produkte Graf Von Rex Faserfreies, nicht brennbares, geschäumtes Isolier- und Brandschutzmaterial und Verfahren zu seiner Herstellung
DE10053552A1 (de) * 2000-10-27 2002-05-16 Kaenner Karin Insbesondere plattenförmiger Formling
PL2740577T3 (pl) * 2012-12-05 2016-06-30 Zehnder Group Int Ag Sposób wytwarzania kształtki
DE102015121397A1 (de) 2015-12-09 2017-06-14 Elringklinger Ag Verfahren zum Herstellen eines formstabilen Faserbauteiles sowie eine ein Bindemittel enthaltende Suspension hierfür
EP3403818A1 (fr) * 2017-05-15 2018-11-21 Evonik Degussa GmbH Corps moulé thermo-isolant contenant un substrat poreux
DE102018110147A1 (de) * 2018-04-26 2019-10-31 Elringklinger Ag Verfahren zum Herstellen eines formstabilen Faserbauteiles sowie eine Suspension hierfür
WO2024002493A1 (fr) * 2022-07-01 2024-01-04 Bott Monika Dispositif de support pour un élément panneau

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
FR2387822A1 (fr) * 1977-04-21 1978-11-17 Matec Holding Perfectionnements aux elements d'insonorisation pour compartiments de moteurs de vehicules et aux compartiments equipes de tels elements
US4328034A (en) * 1980-05-27 1982-05-04 Ferguson Charles N Foam composition and process
DE3246619A1 (de) * 1982-12-16 1984-06-20 Dynamit Nobel Ag, 5210 Troisdorf Schaeumbare wasserhaltige haertbare anorganische formmassen, daraus hergestellte formkoerper und verfahren zur herstellung der formmasse
US4786670A (en) * 1987-01-09 1988-11-22 Lydall, Inc. Compressible non-asbestos high-temperature sheet material usable for gaskets
US5244726A (en) * 1988-02-23 1993-09-14 The Hera Corporation Advanced geopolymer composites
SE463513B (sv) * 1988-07-21 1990-12-03 Eka Nobel Ab Komposition foer beredning av en vaermeisolerande keramisk belaeggning paa en metall, foerfarande foer dess framstaellning, anvaendning av densamma samt avgasroer foersett med en belaeggning av en saadan komposition
JP2579374B2 (ja) * 1989-01-24 1997-02-05 イビデン株式会社 高温用ガスケット
DE3922636C1 (en) * 1989-07-10 1991-01-24 Goetze Ag, 5093 Burscheid, De Thermally shielding ICE construction parts - using device comprising metal shield or film coated with heat insulation material
DE4040180A1 (de) * 1990-12-15 1992-06-17 Huels Troisdorf Verfahren zur herstellung von feinporigem schaum aus im wesentlichen anorganischen bestandteilen
DE4301749A1 (de) * 1993-01-23 1994-07-28 Illbruck Gmbh Schalldämpfer

Non-Patent Citations (1)

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Title
See references of WO9526938A1 *

Also Published As

Publication number Publication date
WO1995026938A1 (fr) 1995-10-12
DE4411436A1 (de) 1995-10-05

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