EP0063715A1 - Schallisolierende Platte - Google Patents

Schallisolierende Platte Download PDF

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Publication number
EP0063715A1
EP0063715A1 EP82102836A EP82102836A EP0063715A1 EP 0063715 A1 EP0063715 A1 EP 0063715A1 EP 82102836 A EP82102836 A EP 82102836A EP 82102836 A EP82102836 A EP 82102836A EP 0063715 A1 EP0063715 A1 EP 0063715A1
Authority
EP
European Patent Office
Prior art keywords
resin layer
plate
density
sound insulating
low
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Withdrawn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
EP82102836A
Other languages
English (en)
French (fr)
Inventor
Yoshikazu Nissan Motor Company Ltd. Hayakawa
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of EP0063715A1 publication Critical patent/EP0063715A1/de
Withdrawn legal-status Critical Current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
    • 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

Definitions

  • the present invention relates to a sound insulating plate for insulating audible noise produced by a mechanism, and more specifically to a sound insulating cover plate having two thermoplastic resin layers.
  • Mechanisms which produce audible noise are often covered with a sound insulating plate in order to provide noise insulation.
  • the plate is attached to the external surface of the mechanism so as to closely cover it.
  • the prior-art sound insulating plate of single-layer type is formed of a piece of steel plate.
  • the prior-art sound insulating plate of double-layer type is formed of a piece of steel plate and a layer of synthetic resin such as polyurethane.
  • the sound insulating plate for insulating audible noise produced from a mechanical part comprises a base plate attached to a mechanism which produces audible noise, a low-density resin layer formed on the base plate, and an external high-density heat-hardened resin layer formed on the low-density resin layer by heating its surface.
  • the steps of manufacturing the sound insulating plate for insulating .audible noise produced by a mechanism according to the present invention comprises the step of fixing a low-density thermoplastic resin layer to a base plate, and the step of heating the external surface of the low-density thermoplastic resin layer to a temperature at which the low-density thermoplastic resin layer is heat-hardened.
  • FIG. 1 A prior-art sound insulating plate is shown in Fig. 1.
  • This sound insulating plate is formed of a piece of steel plate 1, that is, of a single layer.
  • this single layer sound insulating plate is usually formed by pressing a cold- or hot-worked steel plate 1 with a press machine provided with a male die 2 and a female die 3.
  • Another prior-art sound insulating plate is a double-layer sound insulating plate having a layer of synthetic resin, such as polyurethane, fixed to the surface of a steel plate, which is usually made by press work.
  • FIG. 3 shows a first embodiment of the sound insulating plate according to the present invention.
  • the reference numeral 10 denotes a steel plate.
  • a layer of low-density thermoplastic resin is fixed to one surface of the steel plate 10.
  • This thermoplastic resin .layer 11 is of a low-density foam type such as polyamide, polyurethane, etc., which will fuse and condense when partially melted or treated with high heat.
  • the reference numeral 12 denotes a high-density external layer, which is formed by heating the external surface of the low-density thermoplastic resin layer 11 to a temperature at which a heat-hardened layer can be formed.
  • Figs. 4 and.5 show some manufacturing steps for the sound insulating plate according to the present invention.
  • the low-density thermoplastic resin foam layer 11 of predetermined thickness is fixed to the surface of the steel plate 10.
  • a heat plate 13 heated with a heater H is brought near the surface of the thermoplastic resin layer 11 with an appropriate clearance, in order to heat, contract, and harden the surface of the thermoplastic resin layer 11.
  • an external high-density heat-hardened layer 12 will cover the resin layer 11.
  • the thickness and the density of the external heat-hardened layer 12 are adjusted by controlling the temperature of the heat plate 13, the distance between the heat plate 13 and the thermoplastic .resin layer 11, and the length of time for which the heat plate 13 is heated.
  • an appropriate specific gravity for the external heat-hardened layer 12 is in the range 0.8 to 1.2 and an appropriate specific gravity for the thermplastic resin layer 11 is in the range of 0.01 to 0.5.
  • Fig. 6 shows a second manufacturing method of the sound insulating plate according to the present invention, in which it is possible to accurately conform the surface of the layer 12 with a uniform density.
  • steel plate 10 provided with the thermoplastic resin layer 11 thereon is first mounted on a supporting base 14, and next the heat plate 13 is heated to a high temperature after being brought into pressure-contact with the surface of the thermoplastic resin layer 11. In this case, it is possible to form the external heat-hardened layer 12 quickly.
  • Fig. 7 shows a modified sound insulating plate according to the present invention
  • Fig. 8 shows a third manufacturing method for the modified sound insulating plate according to the present invention.
  • the external heat-hardened layer 12 covering the thermoplastic resin layer 11 is formed in an appropriate shape so as to fit the mechanism to be insulated.
  • the irregular external layer 12 can be formed by bringing a heat plate 13 having a plurality of projections 15 near the surface of the thermoplastic resin layer 11, in order to heat, partially melt, and harden the layer 11, and after that, separating the heat plate 13 from the newly-formed heat-hardened layer 12.
  • the steel plate 10 with the thermoplastic resin layer 11 fixed thereon is first mounted on a supporting base 14 and a finishing model plate 20 having projections 19 is fixed to the lower surface of the heat plate 13, and next the heat plate 13 is heated to a high temperature after being brought into pressure contact with the surface of the thermoplastic resin layer 11.
  • the sound insulating plate is formed in such a way that the heat plate 13 or the finishing model plate 20 is formed into a shape similar to that of the surface of a mechanism to which the sound insulating plate is to be attached, for instance, when the sound insulating plate is formed into the same shape as that of an engine, even though the profile of the engine is irregular, it is possible to fit the sound insulating plate onto the engine with an appropriate constant clearance therebetween; that is, it is possible to muffle audible noise produced by the engine without deteriorating engine performance.
  • Fig. 9 shows the sound insulation curve of the sound insulating plate c according to the present invention, and includes the curves for the 'prior-art single-layer plate a and double-layer plate b for comparison.
  • the abscissa represents the frequency (f KHz) and the ordinate represents the effect of sound insulation effect (dB). Therefore, in the figure, the greater the numeral value of sound insulation dB, the higher the sound insulation effect.
  • the sound insulation effect is about 20 dB at a frequency of 0.5 KHz and is about 40 dB at 5 KHz.
  • the sound insulation effect between 0.5 and 5 KHz is roughly proportional to frequency, in accordance with inertial effects.
  • the sound insulation effect values at a frequency of 5 KHz will. referred to hereinafter as the representative values.
  • the sound insulation effect is about 20 dB at a frequency of 0.5 KHz, but is about 50 dB at 5 KHz.
  • the sound insulation effect between 0.5 KHz and 5 KHz is roughly proportional to frequency, similar the characteristic curve a.
  • the sound insulation effect is about 27 dB at a frequency of 0.5 KHz, but is about 62 dB at 5 KHz.
  • the sound insulation effect between 0.5 KHz and 5 KHz is roughly proportional to frequency, similar to the characteristic curves a and b.
  • the sound insulation plate of the present invention in addition to the sound damping effect due to the low-density foam thermoplastic resin layer, which is roughly the same as that Y due to the synthetic resin layer on the prior-art double-layer sound insulation plate, there is an additional sound insulation effect Z based on cover effect due to the fact that sound waves within the thermoplastic resin layer are repeatedly reflected and attenuated between the high-density external layer and the steel-plate. Therefore, in spite of having roughly the same thickness and weight as that of the prior-art double-layer sound insulation plate, the sound insulation plate of the present invention has an improved sound insulation effect.
  • the sound insulation plate according to the present invention since there is a low-density thermoplastic resin layer having a predetermined thickness on the surface of a metal plate, and further since there is a high-density external heat-hardened layer - on the low-density thermoplastic resin formed by heating the external surface of the thermoplastic resin layer, in addition to the sound insulation effect or sound damping effect due to the low-density thermoplastic resin layer, there exists another sound insulation effect based on a covering effect due to the external heat-hardened layer such that the sound waves of noise within the thermoplastic resin layer are repeatedly reflected and attenuated between the high-density external heat-hardened layer and the steel .plate, thus improving sound insulation effect compared with the case in the prior-art sound insulating plate. Further, since the sound insulation effect of the plate according to the present invention is great, it is possible to reduce the thickness and the weight of the sound insulation plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
EP82102836A 1981-04-20 1982-04-02 Schallisolierende Platte Withdrawn EP0063715A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP64002/81 1981-04-20
JP6400281A JPS57178855A (en) 1981-04-30 1981-04-30 Acoustic board

Publications (1)

Publication Number Publication Date
EP0063715A1 true EP0063715A1 (de) 1982-11-03

Family

ID=13245555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82102836A Withdrawn EP0063715A1 (de) 1981-04-20 1982-04-02 Schallisolierende Platte

Country Status (2)

Country Link
EP (1) EP0063715A1 (de)
JP (1) JPS57178855A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022053A1 (en) * 1991-05-30 1992-12-10 Short Brothers Plc Noise attenuation panel
EP0691462A1 (de) * 1994-07-07 1996-01-10 Steyr Nutzfahrzeuge Ag Teilgekapselte Brennkraftmaschine
EP0765737A1 (de) * 1995-03-13 1997-04-02 Sumitomo Chemical Company, Limited Geräuschdämmendes bauteil
FR2745034A1 (fr) * 1996-02-21 1997-08-22 Coutier Moulage Gen Ind Carter insonorise pour motorisation et son procede de fabrication
WO2002083461A1 (en) * 2001-04-02 2002-10-24 Darren Aster Gunasekera Acoustic tile and its use in vehicle sound proofing
EP1329613A1 (de) * 2002-01-18 2003-07-23 Bayer Aktiengesellschaft Akustisches Abschirmelement
EP1215085A3 (de) * 2000-12-15 2004-02-04 Rieter Automotive (International) Ag Vorgeformtes Schalldämmelement und Verfahren zur Herstellung desselben
EP1459939A1 (de) * 2003-03-20 2004-09-22 Intier Automotive Näher GmbH Schallreduktionssystem für Kraftfahrzeuge
EP1498598A1 (de) * 2003-07-15 2005-01-19 Carcoustics Tech Center GmbH Schallisolierendes Gehäuseteil aus Kunststoff für Brennkraftmaschinen oder Fahrzeuggetriebe
DE102007060525A1 (de) * 2007-12-13 2009-06-18 Aksys Gmbh Schalldämpfungs-Luftführungskanal und Verfahren zur Herstellung eines Schalldämpfungs-Luftführungskanals
CN103240775A (zh) * 2013-05-16 2013-08-14 中国林业科学研究院木材工业研究所 一种实木吸音板及其制作方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6267392A (ja) * 1985-09-17 1987-03-27 株式会社豊田自動織機製作所 防音制振層付金属機器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1563768A (de) * 1967-12-29 1969-04-18
US3443007A (en) * 1967-02-21 1969-05-06 Mobay Chemical Corp Process for producing a smooth impervious skin on the surface of a resilient sheet of foamed plastic
GB1258771A (de) * 1968-04-26 1971-12-30
NL7118119A (en) * 1969-02-20 1972-07-04 Ethylene vinyl acetate copolymer panel - with expanded plastic layer for sound insulation
FR2293299A1 (fr) * 1974-12-05 1976-07-02 Leuna Werke Veb Bande flexible multicouche a base de feuille de matiere thermoplastique expansee et procede pour sa fabrication
GB2074939A (en) * 1980-05-01 1981-11-11 E A R Corp Acoustical laminate construction and attenuated systems comprising same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3443007A (en) * 1967-02-21 1969-05-06 Mobay Chemical Corp Process for producing a smooth impervious skin on the surface of a resilient sheet of foamed plastic
FR1563768A (de) * 1967-12-29 1969-04-18
GB1258771A (de) * 1968-04-26 1971-12-30
NL7118119A (en) * 1969-02-20 1972-07-04 Ethylene vinyl acetate copolymer panel - with expanded plastic layer for sound insulation
FR2293299A1 (fr) * 1974-12-05 1976-07-02 Leuna Werke Veb Bande flexible multicouche a base de feuille de matiere thermoplastique expansee et procede pour sa fabrication
GB2074939A (en) * 1980-05-01 1981-11-11 E A R Corp Acoustical laminate construction and attenuated systems comprising same

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022053A1 (en) * 1991-05-30 1992-12-10 Short Brothers Plc Noise attenuation panel
EP0691462A1 (de) * 1994-07-07 1996-01-10 Steyr Nutzfahrzeuge Ag Teilgekapselte Brennkraftmaschine
EP0765737A1 (de) * 1995-03-13 1997-04-02 Sumitomo Chemical Company, Limited Geräuschdämmendes bauteil
EP0765737A4 (de) * 1995-03-13 1999-07-21 Sumitomo Chemical Co Geräuschdämmendes bauteil
FR2745034A1 (fr) * 1996-02-21 1997-08-22 Coutier Moulage Gen Ind Carter insonorise pour motorisation et son procede de fabrication
EP1215085A3 (de) * 2000-12-15 2004-02-04 Rieter Automotive (International) Ag Vorgeformtes Schalldämmelement und Verfahren zur Herstellung desselben
WO2002083461A1 (en) * 2001-04-02 2002-10-24 Darren Aster Gunasekera Acoustic tile and its use in vehicle sound proofing
EP1329613A1 (de) * 2002-01-18 2003-07-23 Bayer Aktiengesellschaft Akustisches Abschirmelement
US6666297B2 (en) 2002-01-18 2003-12-23 Bayer Aktiengesellschaft Acoustic shielding article
EP1459939A1 (de) * 2003-03-20 2004-09-22 Intier Automotive Näher GmbH Schallreduktionssystem für Kraftfahrzeuge
EP1498598A1 (de) * 2003-07-15 2005-01-19 Carcoustics Tech Center GmbH Schallisolierendes Gehäuseteil aus Kunststoff für Brennkraftmaschinen oder Fahrzeuggetriebe
DE102007060525A1 (de) * 2007-12-13 2009-06-18 Aksys Gmbh Schalldämpfungs-Luftführungskanal und Verfahren zur Herstellung eines Schalldämpfungs-Luftführungskanals
CN103240775A (zh) * 2013-05-16 2013-08-14 中国林业科学研究院木材工业研究所 一种实木吸音板及其制作方法
CN103240775B (zh) * 2013-05-16 2015-04-08 中国林业科学研究院木材工业研究所 一种实木吸音板及其制作方法

Also Published As

Publication number Publication date
JPS57178855A (en) 1982-11-04

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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17P Request for examination filed

Effective date: 19820402

AK Designated contracting states

Designated state(s): DE FR GB

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NISSAN MOTOR CO., LTD.

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860107

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HAYAKAWA, YOSHIKAZUNISSAN MOTOR COMPANY, LTD.