EP1557819A1 - Schallabsorbierende Struktur - Google Patents
Schallabsorbierende Struktur Download PDFInfo
- Publication number
- EP1557819A1 EP1557819A1 EP05400004A EP05400004A EP1557819A1 EP 1557819 A1 EP1557819 A1 EP 1557819A1 EP 05400004 A EP05400004 A EP 05400004A EP 05400004 A EP05400004 A EP 05400004A EP 1557819 A1 EP1557819 A1 EP 1557819A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- structural elements
- particles
- structure according
- hollow
- hollow structural
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
- G10K11/165—Particles in a matrix
Definitions
- the invention relates to sound-absorbing structures and a method for producing structural elements, used in the structures of the invention become. Especially for applications, where structure-borne noise occurs and a damping needs, can be applied.
- the invention may conveniently also in the mobile Use find application, in addition to sound-absorbing Features also considered the lightweight aspect can be.
- hollow elements such as hollow balls.
- hollow spheres as loose Bulk, analogous to fiber structures but also as cohesively interconnected hollow balls form sound insulating elements.
- Such hollow spheres or hollow sphere structures can relatively good airborne sound attenuation and the sound level to reduce.
- the object of the invention is to provide a sound-absorbing To propose structure with consideration the lightweight construction aspect also improved Soundproofing is achievable.
- the shells of such structural elements can thereby completely closed and tight. You can but also have a certain porosity, wherein just to be sure that the inside Cavity does not trap solid particles can pass through such shells.
- Hollow structural elements to be used according to the invention optionally also the enclosed ones Hollow bodies can be in the form of spherical ones Have hollow balls. But you can also use other geometric ones Form contours. For the hollow body is to favor a spherical design.
- hollow structural elements can, as out already known in the art, also as loose bed, but also in the form of a cohesive obtained solid composite, wherein in the latter case lightweight, self-supporting sound-insulating Structures are made available can, which also have a certain amount of mechanical Have strength and within certain limits achieve load-bearing properties.
- the effect of the sound-absorbing invention Structures can be influenced within relatively wide limits become. For example, the degree of filling with loose, solid particles within the cavities, the respective particle size or a particle size distribution as well as the physical density of the particles suitable parameters.
- the cavities of the structural elements should be as possible be filled with loose solid particles, the at least a volume of 5% of that of a shell fill in the enclosed cavity.
- hollow structural elements be advantageously formed in the form of hollow spheres, At least, however, you should have a spherical surface exhibit. But such forms of design are also for those alone or in addition to solid loose particles in hollow structural elements enclosed hollow body suitable.
- Spherical structural elements can also be used later deformed, for example, if a solid bond from structural elements to a sound-absorbing Lightweight component is desired.
- the structural elements can have external dimensions / diameter in the range 0.5 to 30 mm and shell thicknesses in Range 10 to 3000 microns have.
- the hollow structural elements can, as already mentioned, in the form of a loose bed a sound-absorbing Train structure. It exists however also the possibility of cohesive structural elements to join together, which by gluing, Soldering or sintering, is achievable. Hollow structural elements but according to the invention can also within to be shed a matrix, for example with a suitable hardenable plastic or a relatively low-melting metal possible becomes.
- the solid particles that are in a layer immediately formed on the surface of the polymeric core is, if possible following the expulsion of the organic components (e.g., pyrolysis). This will cause the loose, free moving particles before to form the shell of hollow Structural elements leading to free sintering.
- a selection of suitable for this purpose Material for the powdered particles, which in the directly on the surface of the polymeric Kerns trained layer are included take into account the respective sintering temperatures. So can be a material for the powdery particles in This layer will be selected, which is a clear higher sintering temperature than the powdered Particles hollow to form the shell Lead structure elements by sintering.
- the release of the particles from the immediate on formed the surface of the polymeric core Layer during a heat treatment can also be characterized be supported by a high proportion of space-preserving, preferably organic binder components together with powdery particles this layer form.
- the size / diameter of the Shell hollow structural elements leads. Accordingly should be the inner layer that is directly on the polymeric core was applied, preferably in advance be disintegrated and no own inner shell formed have in direct contact with the the outer shell by sintering forming outer Layer during the actual sintering process, so no residual stresses on such shells be formed and also a cracking of shells be avoided by hollow structural elements can.
- the freely movable ones contained in hollow structural elements solid particles or hollow bodies should from one for the material, which ultimately the Shell of hollow structural elements forms, inert Be formed materials and no other Have affinities for this material.
- Suitable materials are, for example, carbides, Nitrides, oxides, silicides or aluminides, also known as Mixture may be included in structural elements. You should, however, the mentioned increased sintering and Adhere to melting temperatures.
- the particles may preferably be formed from suitable oxides, such as Al 2 O 3 , MgO, ZrO 2 or Y 2 O 3 , in which case the respective sintering temperatures over many suitable metals or metal alloys, which for the formation of shells hollow structural elements by powder metallurgy are suitable lie.
- suitable oxides such as Al 2 O 3 , MgO, ZrO 2 or Y 2 O 3 , in which case the respective sintering temperatures over many suitable metals or metal alloys, which for the formation of shells hollow structural elements by powder metallurgy are suitable lie.
- the powdered starting particles used for formed directly on the polymeric core Layer can with particle sizes in the range of 5 nm up to 500 microns are used. particle with sizes above 100 ⁇ m may be preferred in cores embedded by extrusion, powder granulation or pelleting, wherein for further explanations be given below.
- sound-absorbing structures according to the invention can but also completely hollow structural elements in Compound with the solid particles according to the invention and / or hollow body containing hollow structural elements be used, so that within certain limits a mass reduction can be achieved.
- the physical density of sound-absorbing structures according to the invention can be kept ⁇ 1 g / cm 3 .
- this can be done so that on a core, from an organic polymer preferred Fabric, for example, polystyrene a multi-layered Coating is applied, in which case subsequently at least by means of the uppermost layer the final outer shell of the hollow structural elements can be formed.
- an organic polymer preferred Fabric for example, polystyrene a multi-layered Coating is applied, in which case subsequently at least by means of the uppermost layer the final outer shell of the hollow structural elements can be formed.
- powdered particles included in individual layers of such a coating.
- the powdery particles that form the shells of the to form hollow structural elements, from a sinterable Material (metal, ceramic) formed.
- the powdery particles, at least in the immediate contained on the core layer are, in contrast, however, from a material, the worse or at much higher temperatures, sintered as the actual shell material can be formed.
- the corresponding coated cores are then hereinafter in a known form of a thermal Undergoing treatment, being in a first Step, optionally after a pre-drying, the organic components are expelled (e.g. Pyrolysis). Subsequently, the temperature is then increased and it takes place to form the closed Peel a sintering, which is then used to trap the non-sintered solid particles within the trapped by shells cavities leads.
- a thermal Undergoing treatment being in a first Step, optionally after a pre-drying, the organic components are expelled (e.g. Pyrolysis). Subsequently, the temperature is then increased and it takes place to form the closed Peel a sintering, which is then used to trap the non-sintered solid particles within the trapped by shells cavities leads.
- hollow structural elements in which hollow body are freely movable, can in the directly formed on the polymeric core Layer of powdery particles with high Be included in sintering activity, which is also a smaller Particle size may have, as the powdery Particles formed by sintering to form the Cup of hollow structural elements used are.
- hollow bodies arranged freely movably in hollow structural elements can be formed from sinter-active metal compounds, preferably oxides selected from Fe 2 O 3 , Fe 3 O 4 , CuO, NiO, MoO 3 , WO 3 and CoO, the respective particle size being smaller than 30 ⁇ m , preferably less than 1 micron can be selected.
- Form shell of the hollow structural elements may be preferred Metal powder, such as iron with copper, whereby the copper infiltrates into an iron shell can be.
- the particle size of this metal powder should be kept at least 30 microns.
- the mass should be advantageous in hollow structural elements contained particles or hollow bodies s the mass of the respective shell of a structural element be.
- organic substances or substance mixtures can known and suitable organic binders / plastics be used.
- the production of such Cores can, for example, with the help of an extruder respectively.
- the extrudate can be replaced by a corresponding shaped die to be pressed and a desired assume geometric shape.
- the from the Die emerging strand can then be divided into individual parts be cut to appropriate length.
- Cores containing particles can also pass through Powder granulation and other pelleting processes become.
- the cores thus produced are then treated with at least coated in a layer in which a sinterable powdered Material is included.
- a temperature treatment the as already described, carried out.
- a first process step e.g., pyrolysis
- the organic components are removed from the nucleus and possibly also expelled from the topcoat and subsequently then again for Formation of the shells of the hollow structural elements the sintering.
- EPS prefoamed expandable Polystyrene
- This coating consisted of 70% by volume Alumina powder with a particle size in the range from 2 to 40 microns and 30 vol .-% zinc stearate powder in an aqueous PVA (polyvinyl alcohol) binder solution. There were a total of 870 g of alumina powder applied. Following the training of this first layer immediately on the surface of the Kernels were applied to another layer, which made off an aqueous PVA (polyvinyl alcohol) binder solution and carbonyl iron powder having an average particle size is formed by 6 microns. In total, were 430 g carbonyl iron powder on the already with Aluminum oxide powder coated cores applied.
- EPS prefoamed expandable Polystyrene
- the hollow structural elements produced in this way then formed magnesium oxide particles in loose, freely movable, hollow spheres.
- the average diameter of the sintered balls was 2.8 mm with a bulk density of 0.5 g / cm 3 .
- the degree of filling of the hollow spheres with magnesium oxide was about 20 to 25% of the internal volume.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Powder Metallurgy (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Laminated Bodies (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
Description
Claims (26)
dadurch gekennzeichnet, dass die Struktur vollständig aus feste Partikel und/oder Hohlkörper enthaltenden hohlen Strukturelementen gebildet ist.
dadurch gekennzeichnet, dass die hohlen Strukturelemente eine lose Schüttung bilden.
dadurch gekennzeichnet, dass die hohlen Strukturelemente stoffschlüssig miteinander verbunden sind.
dadurch gekennzeichnet, dass die hohlen Strukturelemente durch Kleben, Löten oder Sintern miteinander verbunden bzw. innerhalb einer Matrix vergossen sind.
dadurch gekennzeichnet, dass das Oxid ausgewählt aus Al2O3, ZrO2, Y2O3 und MgO ist.
im Anschluss an die Beschichtung eine Wärmebehandlung durchgeführt wird, bei der zuerst die organischen Bestandteile ausgetrieben, die pulverförmigen Partikel der vorab unmittelbar auf dem Kern ausgebildeten Schicht freigegeben und die pulverförmigen Partikel der äußeren Schicht zu einer Schale versintert werden.
dadurch gekennzeichnet, dass die Sintertemperatur der pulverförmigen Partikel, die in der unmittelbar auf dem Kern ausgebildeten Schicht enthalten sind, mindestens 100 °K höher, als die Sintertemperatur von pulverförmigen Partikeln, in der die äußere Schale bildenden Schicht ist.
dadurch gekennzeichnet, dass in der unmittelbar auf dem Kern aufgebrachten Schicht pulverförmige Partikel aus unterschiedlichen Werkstoffen und/oder mit unterschiedlicher Partikelgröße enthalten sind.
dabei die unmittelbar auf dem Kern ausgebildete Schicht sinterbare pulverförmige Partikel enthält, die bei einer Temperatur miteinander versintern, die ≤ die Sintertemperatur von pulverförmigen Partikeln, die in einer äußeren Schicht enthalten sind, ist und/oder
ein größeres Schwindmaß beim Sintern aufweisen,
im Anschluss an die Beschichtung eine Wärmebehandlung durchgeführt wird,
bei der zuerst die organischen Bestandteile ausgetrieben,
dann die pulverförmigen Partikel der Schichten miteinander versintern und dabei eine äußere Schale für ein hohles Strukturelement und innerhalb eines jeweiligen hohlen Strukturelementes ein darin eingeschlossener Hohlkörper ausgebildet werden.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004003507A DE102004003507B4 (de) | 2004-01-16 | 2004-01-16 | Schallabsorbierende Struktur |
| DE102004003507 | 2004-01-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1557819A1 true EP1557819A1 (de) | 2005-07-27 |
| EP1557819B1 EP1557819B1 (de) | 2008-01-09 |
Family
ID=34625781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05400004A Expired - Lifetime EP1557819B1 (de) | 2004-01-16 | 2005-01-14 | Schallabsorbierende Struktur |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1557819B1 (de) |
| AT (1) | ATE383639T1 (de) |
| DE (2) | DE102004003507B4 (de) |
| ES (1) | ES2299985T3 (de) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011089130A3 (de) * | 2010-01-19 | 2011-10-13 | Basf Se | Verfahren zur herstellung von hohlkörpern mit eingeschlossenen frei beweglichen partikeln |
| WO2014033020A1 (de) * | 2012-08-31 | 2014-03-06 | Sandvik Intellectual Property Ab | Schwingungsgedämpftes werkzeug |
| EP3570274A1 (de) | 2018-05-16 | 2019-11-20 | Igor Emri | Schalldämmelement |
| CN110817863A (zh) * | 2019-12-09 | 2020-02-21 | 歌尔股份有限公司 | 活性炭吸音颗粒以及发声装置 |
| EP3926620B1 (de) * | 2020-06-16 | 2025-10-01 | Autoneum Management AG | Kraftfahrzeugverkleidungsteil mit schwingungsdämpfenden eigenschaften |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010115919A1 (de) | 2009-04-07 | 2010-10-14 | Basf Se | Verfahren zur herstellung von hohlkörpern mit eingeschlossenen frei beweglichen partikeln |
| US9056229B2 (en) | 2011-11-01 | 2015-06-16 | Glatt Systemtechnik Gmbh | Piece of sports equipment |
| JP7099257B2 (ja) * | 2018-11-02 | 2022-07-12 | トヨタ自動車株式会社 | 金属構造体の製造方法 |
| DE102020210162A1 (de) | 2020-08-11 | 2022-02-17 | Eichler Geschäftsführung GmbH | Tragvorrichtung für eine Funktionseinheit einer Werkzeugmaschine und Werkzeugmaschine |
| DE102021203028A1 (de) | 2021-03-26 | 2022-09-29 | Eichler Geschäftsführung GmbH | Schwingungsdämpfer und Schwingungsdämpfungssystem |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4667768A (en) * | 1986-05-01 | 1987-05-26 | Lockheed Corporation | Sound absorbing panel |
| FR2660787A1 (fr) * | 1990-04-06 | 1991-10-11 | Technologies Speciales Ingenie | Ecran anechouide. |
| FR2727189A1 (fr) * | 1994-11-21 | 1996-05-24 | Peripherie | Panneau isolant acoustique et son procede de fabrication |
| DE19522363A1 (de) * | 1995-06-20 | 1997-01-02 | Combicom Ag | Platte für den Möbelbau |
| US5777947A (en) * | 1995-03-27 | 1998-07-07 | Georgia Tech Research Corporation | Apparatuses and methods for sound absorption using hollow beads loosely contained in an enclosure |
| US6021612A (en) * | 1995-09-08 | 2000-02-08 | C&D Technologies, Inc. | Sound absorptive hollow core structural panel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2750439A1 (de) * | 1977-11-11 | 1979-05-17 | Volkswagenwerk Ag | Schalldaemmende matte |
| DE3916799A1 (de) * | 1989-05-23 | 1990-11-29 | Sto Poraver Gmbh | Schallabsorptionsplatte |
| DE19826745A1 (de) * | 1998-06-16 | 1999-12-30 | Continental Ag | Dämpfungselement |
-
2004
- 2004-01-16 DE DE102004003507A patent/DE102004003507B4/de not_active Expired - Fee Related
-
2005
- 2005-01-14 DE DE502005002454T patent/DE502005002454D1/de not_active Expired - Lifetime
- 2005-01-14 AT AT05400004T patent/ATE383639T1/de active
- 2005-01-14 ES ES05400004T patent/ES2299985T3/es not_active Expired - Lifetime
- 2005-01-14 EP EP05400004A patent/EP1557819B1/de not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4667768A (en) * | 1986-05-01 | 1987-05-26 | Lockheed Corporation | Sound absorbing panel |
| FR2660787A1 (fr) * | 1990-04-06 | 1991-10-11 | Technologies Speciales Ingenie | Ecran anechouide. |
| FR2727189A1 (fr) * | 1994-11-21 | 1996-05-24 | Peripherie | Panneau isolant acoustique et son procede de fabrication |
| US5777947A (en) * | 1995-03-27 | 1998-07-07 | Georgia Tech Research Corporation | Apparatuses and methods for sound absorption using hollow beads loosely contained in an enclosure |
| DE19522363A1 (de) * | 1995-06-20 | 1997-01-02 | Combicom Ag | Platte für den Möbelbau |
| US6021612A (en) * | 1995-09-08 | 2000-02-08 | C&D Technologies, Inc. | Sound absorptive hollow core structural panel |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011089130A3 (de) * | 2010-01-19 | 2011-10-13 | Basf Se | Verfahren zur herstellung von hohlkörpern mit eingeschlossenen frei beweglichen partikeln |
| CN102712539A (zh) * | 2010-01-19 | 2012-10-03 | 巴斯夫欧洲公司 | 生产具有封闭的可自由运动的颗粒的空心体的方法 |
| US9181136B2 (en) | 2010-01-19 | 2015-11-10 | Basf Se | Method for producing hollow bodies having enclosed freely displaceable particles |
| WO2014033020A1 (de) * | 2012-08-31 | 2014-03-06 | Sandvik Intellectual Property Ab | Schwingungsgedämpftes werkzeug |
| US9855610B2 (en) | 2012-08-31 | 2018-01-02 | Sandvik Intellectual Property Ab | Vibration-damped tool |
| EP3570274A1 (de) | 2018-05-16 | 2019-11-20 | Igor Emri | Schalldämmelement |
| WO2019219474A1 (en) | 2018-05-16 | 2019-11-21 | Igor Emri | Sound insulation element |
| CN110817863A (zh) * | 2019-12-09 | 2020-02-21 | 歌尔股份有限公司 | 活性炭吸音颗粒以及发声装置 |
| EP3926620B1 (de) * | 2020-06-16 | 2025-10-01 | Autoneum Management AG | Kraftfahrzeugverkleidungsteil mit schwingungsdämpfenden eigenschaften |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004003507B4 (de) | 2006-02-16 |
| EP1557819B1 (de) | 2008-01-09 |
| ATE383639T1 (de) | 2008-01-15 |
| DE502005002454D1 (de) | 2008-02-21 |
| ES2299985T3 (es) | 2008-06-01 |
| DE102004003507A1 (de) | 2005-08-11 |
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