EP0311797B1 - Schalldämmendes Abdeckelement - Google Patents

Schalldämmendes Abdeckelement Download PDF

Info

Publication number
EP0311797B1
EP0311797B1 EP19880114906 EP88114906A EP0311797B1 EP 0311797 B1 EP0311797 B1 EP 0311797B1 EP 19880114906 EP19880114906 EP 19880114906 EP 88114906 A EP88114906 A EP 88114906A EP 0311797 B1 EP0311797 B1 EP 0311797B1
Authority
EP
European Patent Office
Prior art keywords
layer
sound
flexible
core layer
produced
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.)
Expired - Lifetime
Application number
EP19880114906
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0311797A3 (en
EP0311797A2 (de
Inventor
Peter Dr.-Ing. Baur
Detlef Dr. Rer. Nat. Guhl
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0311797A2 publication Critical patent/EP0311797A2/de
Publication of EP0311797A3 publication Critical patent/EP0311797A3/de
Application granted granted Critical
Publication of EP0311797B1 publication Critical patent/EP0311797B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches

Definitions

  • the invention relates to a sound-absorbing cover according to the generic preamble of the main claim.
  • an insulation board for sound and heat insulation for motor vehicles and the like which consists of several layers of differently porous and differently filled rubber or rubber-like plastic. What is essential for this known insulation board is the combination of two adjacent layers of foam, one of which contains a high proportion of filler, while the other is unfilled.
  • the invention has for its object to provide a sound-absorbing cover with very good sound insulation, which also has good mechanical properties, in particular high mechanical stability.
  • This object is achieved by the characterizing features of claim 1, wherein on the one hand through the central arrangement of an elastic layer with great damping capacity and a high degree of filling the required damping and on the other hand through the layers applied in an advantageous manner inside and outside the core layer the desired mechanical stability can be achieved.
  • Advantageous further developments have been achieved by the measures listed in the subclaims, both with regard to the layer structure of the cover and with regard to its manufacture.
  • the drawing shows a schematic section of a sound-absorbing cover element.
  • a sound-absorbing cover element 10 is shown schematically, which is designed here as a cylinder head cover for internal combustion engines.
  • the cover element 10 has a three-layer sandwich structure and consists of a core layer 11 which has an outer layer 12 on its outside and an inner layer 13 on its inside.
  • the outer layer 11 and / or the inner layer 13 consists of a thermosetting or thermoplastic plastic or instead of a e.g. deep-drawn metal foil.
  • the core layer 11 is formed from an elastic layer with high damping capacity and here consists of a rubber filled with fillers.
  • the term "rubber” includes materials of this type made of synthetic rubber, rubber or plastic, insofar as these have a rubber-elastic behavior that is specific to rubber.
  • the rubber as part of the core layer 11 is designed to be very soft. It has a very low Shore A hardness.
  • the filler has a high density, for example in the order of up to 3.8 g / cm3.
  • the filler consists of barium sulfate. It has been shown that a core layer 11 designed in this way enables very good sound insulation.
  • the cover element 10 can be produced in the compression molding or injection molding process, using a tool provided with plunging edges (so-called engagement tool), which allows the three layers 11, 12 and 13 of the sandwich to be applied one after the other.
  • the core layer 11 is first produced.
  • the outer layer 12 and inner layer 13 are then applied. If they consist of thermoplastic material, they are e.g. sprayed on or in foil form, e.g. in the form of thermoformed films.
  • the cover element 10 in particular as a cylinder head cover for internal combustion engines, provides very good sound insulation.
  • the cover element 10 is intended for other noise-reducing purposes, e.g. as a cover in the area of the oil pan or at other points in the engine of an internal combustion engine. All other applications for the sound-absorbing cover element 10 are also within the scope of the invention.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Laminated Bodies (AREA)
  • Vibration Dampers (AREA)
EP19880114906 1987-10-10 1988-09-13 Schalldämmendes Abdeckelement Expired - Lifetime EP0311797B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873734312 DE3734312A1 (de) 1987-10-10 1987-10-10 Schalldaemmendes abdeckelement
DE3734312 1987-10-10

Publications (3)

Publication Number Publication Date
EP0311797A2 EP0311797A2 (de) 1989-04-19
EP0311797A3 EP0311797A3 (en) 1990-09-12
EP0311797B1 true EP0311797B1 (de) 1995-03-08

Family

ID=6338053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880114906 Expired - Lifetime EP0311797B1 (de) 1987-10-10 1988-09-13 Schalldämmendes Abdeckelement

Country Status (3)

Country Link
EP (1) EP0311797B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3734312A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES2070122T3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9213804U1 (de) * 1992-10-13 1994-02-10 M. Faist GmbH & Co KG, 86381 Krumbach Recycling-orientiertes Schichtstoffelement zur Schalldämmung
DE4404502C2 (de) * 1994-02-12 2002-02-28 Bosch Gmbh Robert Schalldämmende Abdeckhaube
DE19712472C2 (de) * 1997-03-25 2002-07-04 Greiner Gmbh Verfahren zum Herstellen eines Schwerschichtformteils zur Körperschalldämmung
RU2148724C1 (ru) * 1998-06-15 2000-05-10 Акционерное общество "АвтоВАЗ" Крышка головки цилиндров двигателя внутреннего сгорания
DE102004007602B4 (de) * 2004-02-17 2014-06-18 Volkswagen Ag Abdeckung für einen Verbrennungsmotor eines Kraftfahrzeugs
DE102006039756A1 (de) * 2006-08-24 2008-02-28 Elringklinger Ag Abschirmbauteil, insbesondere Hitzeschild
AT503644B1 (de) * 2006-09-25 2007-12-15 Trumpf Maschinen Austria Gmbh Verfahren zum betrieb einer biegepresse, insbesondere abkantpresse

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE810661C (de) * 1948-10-02 1951-10-25 Siemens & Halske A G Schall- und erschuetterungsisolierendes Bauelement, insbesondere fuer Waende o. dgl.
GB1451707A (en) * 1974-07-26 1976-10-06 British Uralite Ltd Noise control materials
DE2658379A1 (de) * 1976-12-23 1978-06-29 Phoenix Gummiwerke Ag Daemmplatte zur schall- und waermeisolierung
DE2818252A1 (de) * 1978-04-26 1979-11-08 Helmut Pelzer Mehrschichtiges schallschutzelement bestehend aus vorzugsweise 2 deckschichten und einer biegeweichen zwischenschicht
US4223073A (en) * 1978-10-30 1980-09-16 Minnesota Mining And Manufacturing Company High-temperature damping composite
US4303723A (en) * 1980-02-04 1981-12-01 The Goodyear Tire & Rubber Company Sound barrier material
US4452841A (en) * 1982-12-20 1984-06-05 The Goodyear Tire & Rubber Company Unsupported shaped sound barrier component

Also Published As

Publication number Publication date
DE3734312A1 (de) 1989-04-27
ES2070122T3 (es) 1995-06-01
EP0311797A3 (en) 1990-09-12
EP0311797A2 (de) 1989-04-19
DE3734312C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1991-08-08

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