EP1149233B1 - Method of producing a sound-absorbent insulating element and insulating element produced according to this method - Google Patents

Method of producing a sound-absorbent insulating element and insulating element produced according to this method Download PDF

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Publication number
EP1149233B1
EP1149233B1 EP00901030A EP00901030A EP1149233B1 EP 1149233 B1 EP1149233 B1 EP 1149233B1 EP 00901030 A EP00901030 A EP 00901030A EP 00901030 A EP00901030 A EP 00901030A EP 1149233 B1 EP1149233 B1 EP 1149233B1
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EP
European Patent Office
Prior art keywords
sheets
insulating element
sheet
sound
metallic
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EP00901030A
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German (de)
French (fr)
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EP1149233A1 (en
EP1149233B2 (en
Inventor
Evelyn Zwick
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Autoneum International AG
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Rieter Automotive International AG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/14—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having thermal insulation
    • 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
    • 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
    • F02B77/13—Acoustic insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/496—Multiperforated metal article making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12361—All metal or with adjacent metals having aperture or cut
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]
    • Y10T428/12417—Intersecting corrugating or dimples not in a single line [e.g., waffle form, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12479—Porous [e.g., foamed, spongy, cracked, etc.]

Definitions

  • the present invention relates to a method for Production of an insulation part according to the preamble of Claim 1, and an insulation part made therewith according to the preamble of claim 6.
  • Such insulation parts are preferably used in the automotive sector and are there for example between the hot catalytic converter and the vehicle floor used.
  • WO 91/10560 describes a heat shield with a foil package, the heat-conducting zones, so-called Includes heat sinks, and heat insulating zones.
  • the individual foils of the foil package have Embossing or pimples, which lead to the stacked foils are spaced apart.
  • the individual foils can be hermetically sealed together associated with which the inclusion of a gas, e.g. Xenon, is made possible.
  • a gas e.g. Xenon
  • US 5,424,139 discloses an insulation part which is a stack of several thin metallic Scrolling includes between which sheets metallic knitted fabric or an expanded metal-like Spacer is used.
  • this object is achieved by a method solved with the features of claim 1, and in particular by a method for producing a sound-absorbing insulation part with at least two metallic sheets, which are in the form of a foil or can have a thin sheet.
  • a method for producing a sound-absorbing insulation part with at least two metallic sheets which are in the form of a foil or can have a thin sheet.
  • the material in one process step at least one metallic sheet is studded and in a further process step this nubbed sheet connected to at least one second metallic sheet.
  • this nubbed sheet connected to at least one second metallic sheet.
  • thin sheets are just as fissured as thick foils, or sheets in the form of expanded metal. Of is particularly advantageous if aluminum as Material is used for these sheets.
  • a particularly preferred embodiment of the invention provides that the individual metallic Layers, especially foils respectively. Leaves, with each other be cold welded.
  • Cold welding a metallurgical connection is understood in the following, by a plastic deformation of two or more neighboring foils or sheets, occurs at which deformation the metallic Material of adjacent leaves integrally connects.
  • Such a connection can be used with aluminum achieve when neighboring metal sheets for example be compressed by about 75%.
  • this object is achieved by a sound-absorbing Isolation part with the characteristics of the Claim 6 solved, and in particular by a sound absorbing Heat shield, which is at least two comprises metallic sheets, the at least one metallic sheet a variety of knobs and / or Has fissures and with the at least second sheet connected and deformed into a molded insulation part is. It is particularly advantageous if these are metallic Sheets are made of aluminum.
  • the method according to the invention proves to be surprising simple and leads to sound absorbing Isolation parts with surprisingly good sound absorption.
  • a roller device 14 For the production of the insulation parts according to the invention is in a preferred embodiment web-shaped metal foil 12 from a roll 13 continuously stripped and nubbed by a roller device 14 out.
  • This roller device 14 comprises essentially a pimpled roller 15 and a counter roller 16, which is coated with an elastic material, or with a screen-like cooperating with the nub roller 15 Structure can be provided.
  • This counter roller 16 presses the film 12 against the nubs of the nub roller 15.
  • the knobs of the knob roller 15 and the counter roller 16 coordinated so that the Film 12 at the knobs in this roller device 14 partially tears open.
  • the elastic Material of the jacket of the counter roller 16 or through suitable spacing of the rollers can be the number and Size of the fissures 4, 11 in the pimples Foil material 12 can be influenced in a simple manner.
  • the brittleness or elasticity also plays a role of the film material to be pimpled.
  • the so fissured film 13 is then known in Cut to size 19 and stacked 20. It understands themselves that this method is also designed discontinuously can be and the roller device 14 through suitable press plates can be replaced.
  • the fissured leaves with similar or other metallic sheets combined and in known Shaped and fastened together.
  • Fissures 4 compared to needled perforations, better dissipate acoustic energy and sound-absorbing insulation parts, in particular Heat shields with an improved acoustic Have effectiveness established.
  • the air flow resistance on the surface of an acoustic effect Vary the insulation part in a simple manner and set it so that for any shaped insulation part optimal sound dissipation can be achieved. This optimization or adjustment takes place according to the invention about the number, density and length of the fissures.
  • the Film thickness or sheet thickness and the design of the Roller device 14 can have fissures 4, 11 form different lengths.
  • a high Fissure density with shorter fissures 4 (which e.g. on Locations with the greatest strain, i.e. on the tips of the knobs 10 occur), can be achieved, and one lower fissure density with longer fissures 11 that extend over two or more knobs 5, generate.
  • the material of the web 12 is predetermined Parts cut and stacked.
  • cold welding understood a metallurgical connection that by plastic deformation of two or more neighboring sheets comes about, in which Deformation of the metallic material adjacent Connects leaves cohesively. With aluminum leaves achieve such a connection when the material for example compressed by about 75%.
  • FIG. 2 shows two fissured and stacked according to the invention Sheets 2, 3. These sheets have a variety from pimples 5 on which make sure the two Sheets 2, 3 are spaced apart.
  • the one at the produced manufacturing method according to the invention Fissures 4, 11 are essentially in the range of Noppenkamms 10, because, when pimpling, in this area Stretching of the material occurs most pronounced and according to the invention, the elastic limit of the material is exceeded.
  • the sheet material the number and length of each Fissures 4, 11 can be varied.
  • the expert is free, the special shape of the knobs in a suitable To design wise, i.e. the individual knobs 5 as hemispherical, frustoconical, pyramidal, cuboid or to form cylindrical protrusions and their density, arrangement and size in the desired manner select.
  • the insulation parts according to the invention have at least two sheets 2, 3, of which at least one is fissured according to the invention.
  • These sheets 2, 3 are preferably made of aluminum and can imperforate or perforated, especially fissured be, nubbed, ribbed or undeformed, more or less stiff, have different thicknesses or in the form of a Expanded metal.
  • these blades can be used as heat shields with carrier plates known type or with metallic insulation fabrics, -filled nonwovens.

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  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Laminated Bodies (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Building Environments (AREA)

Description

Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung eines Isolationsteils gemäss Oberbegriff des Anspruchs 1, sowie ein damit hergestelltes Isolationsteil gemäss Oberbegriff des Anspruchs 6.The present invention relates to a method for Production of an insulation part according to the preamble of Claim 1, and an insulation part made therewith according to the preamble of claim 6.

Derartige Isolationsteile finden ihre Verwendung vorzugsweise im Automobilbereich und werden dort beispielsweise zwischen den heiss werdenden Katalysator und dem Fahrzeugboden eingesetzt.Such insulation parts are preferably used in the automotive sector and are there for example between the hot catalytic converter and the vehicle floor used.

Derartige Isolationsteile sind bekannt und beispielsweise in der PCT-Anmeldung WO 91/10560 oder US 5,424,139 beschrieben. Die WO 91/10560 beschreibt ein Hitzeschild mit einem Folienpaket, welches wärmeleitende Zonen, sogenannte Wärmesenken, und wärmeisolierende Zonen umfasst. Insbesondere weisen die einzelnen Folien des Folienpakets Einprägungen oder Noppen auf, die dazu führen, dass die gestapelten Folien voneinander beabstandet sind. Die einzelnen Folien können hermetisch dicht miteinander verbunden sein, womit der Einschluss eines Gases, z.B. Xenon, ermöglicht wird. In einer Weiterbildung dieses bekannten Hitzeschildes sind, zur Verbesserung der akustischen Wirksamkeit, die einzelnen Folien perforiert. Die Randbereiche dieser Folienpakete werden in der Praxis ohne wesentliche Druckkraft zusammengedrückt, geschnitten und anschliessend gebördelt, heissversiegelt oder mechanisch verbunden.Such insulation parts are known and for example in PCT application WO 91/10560 or US 5,424,139 described. WO 91/10560 describes a heat shield with a foil package, the heat-conducting zones, so-called Includes heat sinks, and heat insulating zones. In particular, the individual foils of the foil package have Embossing or pimples, which lead to the stacked foils are spaced apart. The individual foils can be hermetically sealed together associated with which the inclusion of a gas, e.g. Xenon, is made possible. In a continuing education this are known heat shield to improve the acoustic effectiveness, the individual foils perforated. The edge areas of these foil packages are used in practice squeezed without significant pressure, cut and then flanged, heat sealed or mechanically connected.

Mit der US 5,424,139 wird ein Isolationsteil offenbart, welches einen Stapel aus mehreren dünnen metallischen Blättern umfasst, zwischen welche Blätter ein metallisches Gewirke respektive ein streckmetallartiger Abstandshalter eingesetzt ist. US 5,424,139 discloses an insulation part which is a stack of several thin metallic Scrolling includes between which sheets metallic knitted fabric or an expanded metal-like Spacer is used.

Es erweist sich, dass die akustische Wirksamkeit dieser Folienpakete wesentlich von der Perforation, der Materialwahl und dem gegenseitigen Abstand der einzelnen Folien abhängt. Um diese Parameter in gewünschter Weise wählen zu können, werden geeignete Folien, vorzugsweise aus Aluminium, über entsprechende Stachelwalzen und/oder Noppenwalzen geführt. Eine vom Akustik-Fachmann gewünschte Änderung der Noppenform oder -dichte, der Perforationsdichte oder der Grösse der einzelnen Perforationen, macht aufwendige Werkzeugänderungen erforderlich.It turns out that the acoustic effectiveness of this Foil packages significantly from the perforation, the Material choice and the mutual distance of the individual Slides depends. To set these parameters as desired Suitable films are preferred, preferably made of aluminum, via appropriate spiked rollers and / or Studded rollers led. One requested by the acoustic specialist Change in knob shape or density, the Perforation density or the size of each Perforations, requires extensive tool changes.

Es ist deshalb die Aufgabe der vorliegenden Erfindung, ein Verfahren zur Herstellung eines schallabsorbierenden Isolationsteils, insbesondere eines schallabsorbierenden Hitzeschildes zu schaffen, welches erlaubt, diese in wenigen Verfahrensschritten herzustellen und Anpassungen resp. Änderungen der Folienparameter in einfacher Weise vorzunehmen. Insbesondere soll mit diesem Verfahren die Perforationsdichte und der durch eine solche Perforation erzeugte Luftströmungswiderstand in einfacher und kostengünstiger Weise geändert werden können.It is therefore the object of the present invention a method of making a sound absorbing Isolation part, in particular a sound absorbing To create heat shields that allow them to be few process steps and adjustments respectively. Changes to the foil parameters in a simple way make. In particular, with this method Perforation density and through such a perforation generated air flow resistance in simple and inexpensive Way can be changed.

Diese Aufgabe wird erfindungsgemäss durch ein Verfahren mit den Merkmalen des Anspruchs 1 gelöst, und insbesondere durch ein Verfahren zur Herstellung eines schallabsorbierenden Isolationsteils mit mindestens zwei metallischen Blättern, welche die Form einer Folie oder eines dünnen Blechs aufweisen können. Bei diesem Verfahren wird in einem Verfahrensschritt das Material mindestens eines metallischen Blattes genoppt und in einem weiteren Verfahrensschritt dieses genoppte Blatt mit mindestens einem zweiten metallischen Blatt verbunden. Beim Noppen des mindestens einen metallischen Blattes wird die Elastizitätsgrenze des Blattmaterials derart überschritten, dass sich Haarrisse resp. Fissuren bilden. Bei diesem erfindungsgemässen Verfahren können dünne Bleche ebensogut wie dicke Folie fissuriert werden, oder Blätter in Form von Streckmetall verwendet. Des weiteren ist von besonderem Vorteil, wenn Aluminium als Material für diese Blätter verwendet wird.According to the invention, this object is achieved by a method solved with the features of claim 1, and in particular by a method for producing a sound-absorbing insulation part with at least two metallic sheets, which are in the form of a foil or can have a thin sheet. With this procedure the material in one process step at least one metallic sheet is studded and in a further process step this nubbed sheet connected to at least one second metallic sheet. When pimpling the at least one metallic Sheet becomes the elastic limit of the sheet material exceeded so that hairline cracks or. fissures form. In this method according to the invention thin sheets are just as fissured as thick foils, or sheets in the form of expanded metal. Of is particularly advantageous if aluminum as Material is used for these sheets.

Eine besonders bevorzugte Ausgestaltung des erfindungsgemässen Verfahrens sieht vor, dass die einzelnen metallischen Lagen, insbesondere Folien resp. Blätter, miteinander kaltverschweisst werden. Unter Kaltverschweissen wird im folgenden eine metallurgische Verbindung verstanden, die durch eine plastische Verformung von zwei oder mehr benachbarten Folien, beziehungsweise Blättern, zustande kommt, bei welcher Verformung sich das metallische Material benachbarter Blätter stoffschlüssig verbindet. Bei Aluminium lässt sich eine derartige Verbindung erzielen, wenn benachbarte Metallblätter beispielsweise um ca. 75% komprimiert werden.A particularly preferred embodiment of the invention The process provides that the individual metallic Layers, especially foils respectively. Leaves, with each other be cold welded. Cold welding a metallurgical connection is understood in the following, by a plastic deformation of two or more neighboring foils or sheets, occurs at which deformation the metallic Material of adjacent leaves integrally connects. Such a connection can be used with aluminum achieve when neighboring metal sheets for example be compressed by about 75%.

Darüberhinaus ist es Aufgabe der Erfindung ein Isolationsteil, insbesondere ein Hitzeschild mit verbesserter und in einfacher Weise optimierbarer akustischer Wirksamkeit zu schaffen.Furthermore, it is an object of the invention to provide an insulation part, especially a heat shield with improved and acoustic effectiveness that can be easily optimized to accomplish.

Diese Aufgabe wird erfindungsgemäss durch ein schallabsorbierendes Isolationsteil mit den Merkmalen des Anspruchs 6 gelöst, und insbesondere durch ein schallabsorbierendes Hitzeschild, welches mindestens zwei metallische Blätter umfasst, wobei das mindestens eine metallische Blatt eine Vielzahl von Noppen und/oder Fissuren aufweist und mit dem mindestens zweiten Blatt verbunden und zu einem geformten Isolationsteil verformt ist. Es ist von besonderem Vorteil, wenn diese metallischen Blätter aus Aluminium bestehen.According to the invention, this object is achieved by a sound-absorbing Isolation part with the characteristics of the Claim 6 solved, and in particular by a sound absorbing Heat shield, which is at least two comprises metallic sheets, the at least one metallic sheet a variety of knobs and / or Has fissures and with the at least second sheet connected and deformed into a molded insulation part is. It is particularly advantageous if these are metallic Sheets are made of aluminum.

Das erfindungsgemässe Verfahren erweist sich als überraschend einfach und führt zu schallabsorbierenden Isolationsteilen mit einer überraschend guten Schallabsorption.The method according to the invention proves to be surprising simple and leads to sound absorbing Isolation parts with surprisingly good sound absorption.

Der obengenannte Erfindungsgegenstand, die Vorteile und Eigenschaften der Erfindung werden im folgenden anhand der Figuren beispielhaft erläutert oder gehen offensichtlich aus der folgenden Beschreibung der bevorzugten Ausführungsform hervor.The subject matter of the invention, the advantages and Features of the invention are described below of the figures exemplified or obvious from the following description of the preferred Embodiment out.

Dabei zeigen:

Fig. 1
eine schematische Darstellung des erfindungsgemässen Herstellungsverfahrens;
Fig. 2
eine schematische Darstellung zweier erfindungsgemäss hergestellter und gestapelter Blätter.
Show:
Fig. 1
a schematic representation of the manufacturing method according to the invention;
Fig. 2
is a schematic representation of two sheets produced and stacked according to the invention.

Für die Herstellung der erfindungsgemässen Isolationsteile wird in einer bevorzugten Ausführungsform eine bahnförmige Metallfolie 12 von einer Rolle 13 kontinuierlich abgezogen und zur Noppung durch eine Walzenvorrichtung 14 geführt. Diese Walzenvorrichtung 14 umfasst im wesentlichen eine Noppenwalze 15 und eine Gegenwalze 16, welche mit einem elastischen Material ummantelt, oder mit einer, mit der Noppenwalze 15 zusammenwirkenden siebartigen Struktur versehen sein kann. Diese Gegenwalze 16 drückt die Folie 12 gegen die Noppen der Noppenwalze 15. Erfindungsgemäss sind die Noppen der Noppenwalze 15 und die Gegenwalze 16 so aufeinander abgestimmt, dass die Folie 12 bei der Noppung in dieser Walzenvorrichtung 14 partiell aufreisst. Durch einfache Wahl des elastischen Materials des Mantels der Gegenwalze 16 oder durch geeignete Beabstandung der Walzen kann die Anzahl und Grösse der beim Noppen auftretenden Fissuren 4, 11 im Folienmaterial 12 in einfacher Weise beeinflusst werden. For the production of the insulation parts according to the invention is in a preferred embodiment web-shaped metal foil 12 from a roll 13 continuously stripped and nubbed by a roller device 14 out. This roller device 14 comprises essentially a pimpled roller 15 and a counter roller 16, which is coated with an elastic material, or with a screen-like cooperating with the nub roller 15 Structure can be provided. This counter roller 16 presses the film 12 against the nubs of the nub roller 15. According to the invention, the knobs of the knob roller 15 and the counter roller 16 coordinated so that the Film 12 at the knobs in this roller device 14 partially tears open. By simply choosing the elastic Material of the jacket of the counter roller 16 or through suitable spacing of the rollers can be the number and Size of the fissures 4, 11 in the pimples Foil material 12 can be influenced in a simple manner.

Dabei spielt auch die Sprödigkeit respektive Elastizität des zu noppenden Folienmaterials eine Rolle. Die derart fissurierte Folie 13 wird anschliessend in bekannter Weise zugeschnitten 19 und gestapelt 20. Es versteht sich, dass dieses Verfahren auch diskontinuierlich ausgelegt sein kann und die Walzenvorrichtung 14 durch geeignete Pressplatten ersetzt werden kann.The brittleness or elasticity also plays a role of the film material to be pimpled. The so fissured film 13 is then known in Cut to size 19 and stacked 20. It understands themselves that this method is also designed discontinuously can be and the roller device 14 through suitable press plates can be replaced.

Zur Herstellung eines erfindungsgemässen Isolationsteils werden die fissurierten Blätter mit gleichartigen oder anderen metallischen Blättern kombiniert und in bekannter Weise geformt und aneinander befestigt.For producing an insulation part according to the invention the fissured leaves with similar or other metallic sheets combined and in known Shaped and fastened together.

Erfindungsgemäss wird also während des Noppens in der Walzenvorrichtung 14 die Elastizitätsgrenze des metallischen Materials der Folie 12 derart überschritten, dass sich eine Vielzahl von unregelmässig angeordneten Fissuren 4, 11 bildet. Es erweist sich als überraschend, dass diese Fissuren 4 im Vergleich zu genadelten Perforationen, die akustische Energie besser dissipieren und sich damit schallabsorbierende Isolationsteile, insbesondere Hitzeschilde mit einer verbesserten akustischen Wirksamkeit herstellen lassen. Darüberhinaus lässt sich mit derartigen fissurierten Folien der Luftströmungswiderstand an der Oberfläche eines akustisch wirksamens Isolationsteils in einfacher Weise variieren und so einstellen, dass für jedes beliebig geformte Isolationsteil eine optimale Schalldissipation erzielt werden kann. Diese Optimierung oder Einstellung erfolgt erfindungsgemäss über die Anzahl, Dichte und Länge der Fissuren.According to the invention is thus during the pimples in the Roller device 14 the elastic limit of the metallic Material of the film 12 exceeded such that a variety of irregularly arranged Fissures 4, 11 forms. It turns out to be surprising that these fissures 4 compared to needled perforations, better dissipate acoustic energy and sound-absorbing insulation parts, in particular Heat shields with an improved acoustic Have effectiveness established. In addition, with such fissured foils the air flow resistance on the surface of an acoustic effect Vary the insulation part in a simple manner and set it so that for any shaped insulation part optimal sound dissipation can be achieved. This optimization or adjustment takes place according to the invention about the number, density and length of the fissures.

Besonders vorteilhaft ist es, wenn ein sprödes und damit leicht reissendes Material verwendet wird, weil sich damit während des Noppens eine gute Fissurenbildung erzielen lässt. Abhängig von der Materialwahl, der Folienstärke bzw. Blechdicke und der Gestaltung der Walzenvorrichtung 14 lassen sich Fissuren 4, 11 mit unterschiedlicher Länge bilden. Dabei kann eine hohe Fissurendichte mit kürzeren Fissuren 4 (welche z.B. an Orten grösster Streckbelastung, d.h. an den Noppenspitzen 10 auftreten), erzielt werden, und lässt sich eine niedrigere Fissurendichte mit längeren Fissuren 11, die sich über zwei oder mehr Noppen 5 erstrecken, erzeugen.It is particularly advantageous if a brittle and therefore easily tearing material is used because of itself thus a good fissure formation during the pimples can be achieved. Depending on the choice of material, the Film thickness or sheet thickness and the design of the Roller device 14 can have fissures 4, 11 form different lengths. A high Fissure density with shorter fissures 4 (which e.g. on Locations with the greatest strain, i.e. on the tips of the knobs 10 occur), can be achieved, and one lower fissure density with longer fissures 11 that extend over two or more knobs 5, generate.

Nach dem Noppen wird das Material der Bahn 12 in vorgegebene Teile geschnitten und gestapelt. Für die Herstellung von schallabsorbierenden Isolationsteilen werden in einer einfachsten Ausführungsform mindestens ein erstes, in obiger Weise fissuriertes Blatt und ein zweites metallisches Blatt übereinander gelegt und mittels Bördeln, Heften, Kleben oder Kaltverschweissen miteinander verbunden. Dabei kann als zweites metallisches Blatt eine Folie oder ein Blech verwendet werden, welche unperforiert oder perforiert, insbesondere fissuriert sein können, welche genoppt, gerippt oder unverformt sein können, welche mehr oder weniger steif sein können, verschiedene Dicken aufweisen können oder in Form eines Streckmetalls verwendet werden können.After the pimples, the material of the web 12 is predetermined Parts cut and stacked. For the production of sound absorbing insulation parts are in in a simplest embodiment, at least a first one, fissured sheet in the above manner and a second metallic one Sheet placed on top of one another and by means of flanging, Binding, gluing or cold welding joined together. One can be a second metallic sheet Foil or a sheet can be used, which is not perforated or perforated, especially fissured which can be napped, ribbed or undeformed which can be more or less stiff, different Can have thicknesses or in the form of a Expanded metal can be used.

Wie bereits oben erläutert wurde, wird unter Kaltverschweissen eine metallurgische Verbindung verstanden, die durch eine plastische Verformung von zwei oder mehr benachbarten Blättern zustandekommt, bei welcher Verformung sich das metallische Material benachbarter Blätter stoffschlüssig verbindet. Bei Aluminium lässt sich eine derartige Verbindung erzielen, wenn das Material beispielsweise um ca. 75% komprimiert wird.As already explained above, cold welding is used understood a metallurgical connection that by plastic deformation of two or more neighboring sheets comes about, in which Deformation of the metallic material adjacent Connects leaves cohesively. With aluminum leaves achieve such a connection when the material for example compressed by about 75%.

Es versteht sich, dass das hier aufgezeigte Herstellungsverfahren weiter automatisiert werden kann, indem beispielsweise die verschiedenen Blätter gleichzeitig von unterschiedlichen Rollen oder Stapeln abgezogen werden und dann gemeinsam zugeschnitten, geformt und/oder kaltverschweisst werden.It is understood that the manufacturing process shown here can be further automated, for example the different sheets of at the same time different rolls or stacks and then cut, shaped and / or cold welded together become.

Figur 2 zeigt zwei erfindungsgemäss fissurierte und gestapelte Blätter 2, 3. Diese Blätter weisen eine Vielzahl von Noppen 5 auf, welche sicherstellen, dass die beiden Blätter 2, 3 voneinander beabstandet sind. Die bei dem erfindungsgemässen Herstellungsverfahren erzeugten Fissuren 4, 11 liegen im wesentlichen im Bereich des Noppenkamms 10, da, beim Noppen, in diesem Bereich die Streckung des Materials am ausgeprägtesten auftritt und erfindungsgemäss die Elastizitätsgrenze des Materials überschritten wird. Es versteht sich, dass durch die Wahl des Blattmaterials die Anzahl und Länge der einzelnen Fissuren 4, 11 variiert werden kann. Ebenso ist der Fachmann frei, die besondere Form der Noppen in geeigneter Weise zu gestalten, d.h. die einzelnen Noppen 5 als halbkugelförmige, kegelstumpfförmige, pyramidale, quaderförmige oder zylindrische Auswölbungen auszubilden und deren Dichte, Anordnung und Grösse in gewünschter Weise auszuwählen.Figure 2 shows two fissured and stacked according to the invention Sheets 2, 3. These sheets have a variety from pimples 5 on which make sure the two Sheets 2, 3 are spaced apart. The one at the produced manufacturing method according to the invention Fissures 4, 11 are essentially in the range of Noppenkamms 10, because, when pimpling, in this area Stretching of the material occurs most pronounced and according to the invention, the elastic limit of the material is exceeded. It goes without saying that by choice of the sheet material the number and length of each Fissures 4, 11 can be varied. Likewise, the expert is free, the special shape of the knobs in a suitable To design wise, i.e. the individual knobs 5 as hemispherical, frustoconical, pyramidal, cuboid or to form cylindrical protrusions and their density, arrangement and size in the desired manner select.

Die erfindungsgemässen Isolationsteile weisen mindestens zwei Blätter 2, 3 auf, von denen mindestens eines erfindungsgemäss fissuriert ist. Diese Blätter 2, 3 sind bevorzugterweise aus Aluminium hergestellt und können unperforiert oder perforiert, insbesondere fissuriert sein, genoppt, gerippt oder unverformt, mehr oder weniger steif, verschiedene Dicken aufweisen oder in Form eines Streckmetalls sein. Bei Verwendung dieser Isolationsteile als Hitzeschilde können diese Blätter mit Trägerblechen bekannter Art oder mit metallischen Isolationsgeweben, -vliesen ergänzt sein.The insulation parts according to the invention have at least two sheets 2, 3, of which at least one is fissured according to the invention. These sheets 2, 3 are preferably made of aluminum and can imperforate or perforated, especially fissured be, nubbed, ribbed or undeformed, more or less stiff, have different thicknesses or in the form of a Expanded metal. When using these insulation parts these blades can be used as heat shields with carrier plates known type or with metallic insulation fabrics, -filled nonwovens.

Claims (10)

  1. Method of producing a sound-absorbing insulating element, in particular a sound-absorbing heat shield, having at least two metallic sheets in the form of foils or metal sheets, of which at least one is embossed, and said sheets being joined and formed together, wherein at least one fissured sheet (2) is produced when, during embossing the material of the at least one metallic sheet, this is overstretched to such an extent that fissures (4) are created.
  2. Method according to claim 1, wherein at least one sheet is used in the form of a stretched metal.
  3. Method according to one of claims 1 or 2, wherein, whilst embossing the material of the at least one sheet, blunt conical knobs are created.
  4. Method according to one of claims 1 or 2, wherein aluminium is used as material for the sheets.
  5. Method according to one of claims 1 to 4, wherein the metallic sheets are cold-soldered together at their edge regions.
  6. Sound-absorbing insulating element, in particular a sound-absorbing heat shield, produced according to the method according to claim 1, wherein the heat shield comprises at least two metallic sheets in the form of foils or metal sheets of which at least one comprises a plurality of knobs (5) and fissures (4, 11) and which sheets (2, 3) are joined together.
  7. Insulating element according to claim 6, wherein this comprises at least one sheet in the form of a stretched metal sheet.
  8. Insulating element according to one of claims 6 or 7, wherein the knobs have a blunt conical shape.
  9. Insulating element according to one of claims 6 to 8, wherein the metallic sheets are of aluminium.
  10. Insulating element according to one of claims 6 to 9, wherein the metallic sheets are cold-soldered together at their edges.
EP00901030A 1999-02-02 2000-02-02 Method of producing a sound-absorbent insulating element and insulating element produced according to this method Expired - Lifetime EP1149233B2 (en)

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CH19299 1999-02-02
CH19299 1999-02-02
PCT/CH2000/000058 WO2000046493A1 (en) 1999-02-02 2000-02-02 Method of producing a sound-absorbent insulating element and insulating element produced according to this method

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EP1149233A1 EP1149233A1 (en) 2001-10-31
EP1149233B1 true EP1149233B1 (en) 2003-01-15
EP1149233B2 EP1149233B2 (en) 2008-09-10

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EP (1) EP1149233B2 (en)
JP (1) JP3578994B2 (en)
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US6555246B1 (en) 2003-04-29
EP1149233A1 (en) 2001-10-31
JP3578994B2 (en) 2004-10-20
EP1149233B2 (en) 2008-09-10
WO2000046493A1 (en) 2000-08-10
JP2002536184A (en) 2002-10-29
DE50001089D1 (en) 2003-02-20

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