US20080156580A1 - Fibre for an Acoustic Insulating Material, Especially for Sound Dampers Compressed Air Devices - Google Patents

Fibre for an Acoustic Insulating Material, Especially for Sound Dampers Compressed Air Devices Download PDF

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Publication number
US20080156580A1
US20080156580A1 US11/658,291 US65829105A US2008156580A1 US 20080156580 A1 US20080156580 A1 US 20080156580A1 US 65829105 A US65829105 A US 65829105A US 2008156580 A1 US2008156580 A1 US 2008156580A1
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US
United States
Prior art keywords
fibre
insulating material
acoustic insulating
material according
cross
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.)
Abandoned
Application number
US11/658,291
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English (en)
Inventor
Hendrik Harting
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.)
ZF CV Systems Hannover GmbH
Original Assignee
Wabco 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 Wabco GmbH filed Critical Wabco GmbH
Assigned to WABCO GMBH reassignment WABCO GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HARTING, HENDRIK
Publication of US20080156580A1 publication Critical patent/US20080156580A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/002—Air treatment devices
    • B60T17/008—Silencer devices

Definitions

  • the present invention relates to a new acoustic insulating material, especially for sound dampers in compressed air devices.
  • insulating materials can be used in the form of a knitted fabric roll in sound dampers of compressed air devices.
  • a knitted fabric roll is made from a tubular knitted fabric produced on a circular knitting machine from warp knit thermoplastic fibres having, for example, rectangular cross section, by cutting a knitted fabric tube to a predetermined length and heat sealing it at its cut faces in such a way that a rectangular tubular portion is obtained. This rectangular tubular portion is then rolled up to obtain a knitted fabric roll. The knitted fabric roll is then pushed into a connecting tube leading to the atmosphere. Aside from the fact that it is necessary to use an additional connecting tube, which requires a large amount of installation space, and that it is necessary to take additional measures to ensure that the knitted fabric roll is held sufficiently in place in the connecting tube, the resulting sound damping is not satisfactory.
  • DE 42 37 630 A1 describes a compressed air venting device that has a primary air path routed from an inlet of a housing via noise damping means to an outlet, and a secondary air path provided parallel thereto and comprising a first sub-channel extending from the inlet and a second sub-channel formed by the outlet or leading to the outlet.
  • the two sub-channels are not filled with the noise damping means.
  • the two sub-channels are in communication with one another via the noise damping means.
  • the two sub-channels and that part of the noise damping means which places the two sub-channels in communication are arranged in such a way that such part of the noise damping means opens up a direct communication path between the two sub-channels when a dynamic pressure is admitted.
  • the noise damping means are formed by a filtering knitted fabric, which comprises a stocking-like woven part of plastic flat wire, which is wound in the form of a roll.
  • the housing is composed of one housing part resembling a pot and another housing part formed as a cover to be snapped thereon.
  • a disadvantage of this compressed air venting device used as a sound damper is that the danger of leaks causing a loud noise level exists at the joints of the housing parts.
  • the known device is relatively bulky, and therefore requires considerable installation space.
  • a new acoustic insulating material especially for sound dampers of compressed air devices.
  • the inventive material overcomes disadvantages associated with conventional acoustic insulating material and enables the construction of a sound damper in the form of a kitted fabric roll for compressed air devices which offers improved noise or sound damping.
  • the present invention embodies an insulating material comprising a knitted fabric tube made from fibres and rolled up to form a knitted fabric roll.
  • plastic fibres having a larger surface area than conventional fibre structures are used because the outer cross-sectional contour of the fibres has a geometric shape differing from that of the round outer form.
  • the enlargement of the surface area of the fibre is achieved by regularly or irregularly profiled fibre cross-sectional contours, especially by a cruciform or stellate fibre cross section.
  • an enlargement of the surface area can also be achieved by an embossed, regular or irregular structure or profiling of the surface of the fibre in longitudinal direction of the fibre.
  • FIG. 1 shows a fibre with cruciform cross section in accordance with one embodiment of the present invention
  • FIG. 2 shows a fibre with stellate cross section in accordance with another embodiment of the present invention
  • FIG. 3 shows a fibre with an irregular stellate cross section in accordance with yet another embodiment of the present invention
  • FIG. 4 shows a fibre with surface profiling in the longitudinal direction in the form of alternating thick and thin cross-sectional regions in accordance with a further embodiment of the present invention
  • FIG. 5 shows a fibre having a cross-sectional profile similar to the fibre depicted in FIG. 1 with additional longitudinal profiling in accordance with a still further embodiment of the present invention
  • FIG. 6 shows a fibre having a cross-sectional profile similar to the fibre depicted FIG. 2 with additional longitudinal profiling in accordance with another embodiment of the present invention.
  • an acoustic insulating material especially for a sound damper in compressed air devices, which includes fibres of a thermoplastic material comprising structures or profiled elements which are moulded or embossed in the surfaces thereof and which raise the surfaces or specific surfaces thereof.
  • the fibres are processed to form braided or woven tubing, the ends thereof being welded such that an approximately rectangular tubular section is created, forming the acoustic insulating material when rolled into a woven tubular element.
  • FIG. 1 shows a fibre 2 having a cruciform cross section
  • FIG. 2 shows a fibre 4 having stellate cross section
  • FIG. 3 shows a fibre 6 having irregular stellate cross section.
  • Such cross-sectional shapes as illustrated in FIGS. 1 to 3 can be produced from thermoplastic plastic materials by known pultrusion methods.
  • FIG. 4 shows a fibre 8 with round cross section, for example, albeit with surface profiling 10 in longitudinal direction in the form of alternating thin regions 12 and thick regions 14 of the cross section, which regions can also be regularly or irregularly structured. Enlargement of the surface area of the fibre can also be achieved by this measure.
  • FIGS. 5 and 6 show fibres 16 , 18 having cross-sectional profiles akin to the fibres depicted in FIGS. 1 and 2 , respectively, with additional longitudinal profiling.
  • This longitudinal profiling can be, for example, wavelike profiling 20 ( FIG. 5 ), or tooth-like profiling 22 ( FIG. 6 ).
  • Polypropylene, polyethylene and other thermoplastic materials are suitable as the material for fibres 2 , 4 , 6 , 8 , 16 , and 18 .
  • the surface profiling in longitudinal direction of the filament can be imprinted or impressed in the surface of the fibre by suitable dies after the continuous fibre has emerged from the orifice of the die.
  • Fibre surface area has, heretofore, not been taken into consideration. It was found that, with a sound damper in which insulating material in the form of a knitted fabric roll containing a fibre with increased surface area in accordance with the present invention is used, considerably greater sound damping is achieved than in the use of conventional knitted fabric rolls.
  • the acoustic energy is converted to dissipation energy.
  • the efficiency is increased by the larger surface area of the fibre.
  • the improved sound damping permits the use of smaller sound dampers, so that a cost reduction can be achieved and less installation space is needed.
  • Conventional knitted fabric rolls in existing sound dampers can be replaced by knitted fabric rolls containing the acoustic insulating material according to the present invention.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Nonwoven Fabrics (AREA)
  • Knitting Of Fabric (AREA)
US11/658,291 2004-07-23 2005-06-04 Fibre for an Acoustic Insulating Material, Especially for Sound Dampers Compressed Air Devices Abandoned US20080156580A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004036030A DE102004036030A1 (de) 2004-07-23 2004-07-23 Faden für akustisches Dämmmaterial, insbesondere für Geräuschdämpfer in Drucklufteinrichtungen
DE102004036030.8 2004-07-23
PCT/EP2005/006030 WO2006010401A1 (fr) 2004-07-23 2005-06-04 Fibre pour materiau isolant acoustique, en particulier pour des attenuateurs sonores dans des dispositifs a air comprime

Publications (1)

Publication Number Publication Date
US20080156580A1 true US20080156580A1 (en) 2008-07-03

Family

ID=34970016

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/658,291 Abandoned US20080156580A1 (en) 2004-07-23 2005-06-04 Fibre for an Acoustic Insulating Material, Especially for Sound Dampers Compressed Air Devices

Country Status (5)

Country Link
US (1) US20080156580A1 (fr)
EP (1) EP1773638B1 (fr)
CN (1) CN1989036B (fr)
DE (1) DE102004036030A1 (fr)
WO (1) WO2006010401A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100063924A1 (en) * 2008-09-09 2010-03-11 Ebay Inc. Payment application framework
US9715871B2 (en) * 2015-07-10 2017-07-25 Hyundai Motor Company Multilayer dash isolation pad having superior formability and sound absorption performance
CN115074912A (zh) * 2022-06-29 2022-09-20 瑞声光电科技(常州)有限公司 阻尼网布

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007035350A1 (de) * 2007-07-27 2009-01-29 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Förderleitung für ein Hydrauliksystem und Hydrauliksystem
DE102009002536A1 (de) * 2009-04-21 2010-10-28 Culimeta Textilglas-Technologie Gmbh & Co.Kg Faserprodukt, Faserformteil sowie Verfahren zur Herstellung desselben
DE202016102158U1 (de) 2016-04-22 2016-05-12 Thoenes Dichtungstechnik Gmbh Schalldämpfermaterial und Schalldämpfer
CN109903747B (zh) * 2019-03-27 2024-02-06 广东览讯科技开发有限公司 一种蝴蝶状消声器
EP4286230A1 (fr) 2022-06-02 2023-12-06 KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH Fibre d'amortissement du bruit avec des rainures de surface

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1951813A (en) * 1931-09-18 1934-03-20 George Leingang Muffler construction
US3243011A (en) * 1964-07-22 1966-03-29 Ramon B Hill Muffler with expansion chamber defining centrifugal flow path
US3400784A (en) * 1965-10-19 1968-09-10 Shannon O. Thrasher Muffler with tangential exhaust intake and porous ends
US5277979A (en) * 1987-08-26 1994-01-11 Rohm And Haas Company Process for microencapsulation
US5286929A (en) * 1991-12-27 1994-02-15 Nissan Motor Co., Ltd. Sound absorbing materials
US5452919A (en) * 1992-06-23 1995-09-26 Rover Group Limited Suspension system for a vehicle
US5467595A (en) * 1991-09-13 1995-11-21 Dunlop Limited Valve means
US5600950A (en) * 1993-05-15 1997-02-11 Mtu Motoren-Und Turbinen-Union Friedrichshafen Gmbh Exhaust gas pipe
US5824972A (en) * 1997-05-13 1998-10-20 Butler; Boyd L. Acoustic muffler
US6006520A (en) * 1997-10-06 1999-12-28 General Motors Corporation Pneumatic assisted brake apply system
US6520266B2 (en) * 2000-07-14 2003-02-18 Hilti Aktiengesellschaft Percussion electrical hand-held tool
US20040023014A1 (en) * 2002-08-05 2004-02-05 Williamson Bruce Scott Acoustical insulation material containing fine thermoplastic fibers
US20040127129A1 (en) * 2002-12-31 2004-07-01 Shuiyuan Luo Grooved-shape monofilaments and the fabrics made thereof
US20040126247A1 (en) * 2002-10-16 2004-07-01 Dietmar Broser Muffler for air compressor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2815464A1 (de) * 1978-04-10 1979-10-18 Rost & Soehne Georg Drosselvorrichtung
DD235680A1 (de) * 1985-03-29 1986-05-14 Guben Chemiefaserwerk Verfahren zum erspinnen oberflaechenstrukturierter polyesterendlosfaeden
JPH01298210A (ja) * 1988-05-20 1989-12-01 Teijin Ltd ポリエステル異形中空繊維及びその製造法
DE4005530A1 (de) * 1990-02-22 1991-08-29 Basf Ag Kohlenstoff-hohlfasern
US5277976A (en) * 1991-10-07 1994-01-11 Minnesota Mining And Manufacturing Company Oriented profile fibers
JPH05279911A (ja) * 1992-03-27 1993-10-26 Kuraray Co Ltd 特殊中空繊維および該繊維からなる繊維集合体の製造方法
DE4237630A1 (de) * 1992-11-05 1994-05-11 Wabco Westinghouse Fahrzeug Druckluft-Entlüftungseinrichtung
US6093491A (en) * 1992-11-30 2000-07-25 Basf Corporation Moisture transport fiber
AU2001269622A1 (en) * 2000-06-29 2002-01-08 R-R And D Centre N.V. Synthetic fibre, nozzle and method for manufacturing the same and thereof
GB2364667A (en) * 2000-07-10 2002-02-06 Du Pont Polymer filaments having open hollow cross-section
US6485828B2 (en) * 2000-12-01 2002-11-26 Oji Paper Co., Ltd. Flat synthetic fiber, method for preparing the same and non-woven fabric prepared using the same

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1951813A (en) * 1931-09-18 1934-03-20 George Leingang Muffler construction
US3243011A (en) * 1964-07-22 1966-03-29 Ramon B Hill Muffler with expansion chamber defining centrifugal flow path
US3400784A (en) * 1965-10-19 1968-09-10 Shannon O. Thrasher Muffler with tangential exhaust intake and porous ends
US5277979A (en) * 1987-08-26 1994-01-11 Rohm And Haas Company Process for microencapsulation
US5467595A (en) * 1991-09-13 1995-11-21 Dunlop Limited Valve means
US5286929A (en) * 1991-12-27 1994-02-15 Nissan Motor Co., Ltd. Sound absorbing materials
US5452919A (en) * 1992-06-23 1995-09-26 Rover Group Limited Suspension system for a vehicle
US5600950A (en) * 1993-05-15 1997-02-11 Mtu Motoren-Und Turbinen-Union Friedrichshafen Gmbh Exhaust gas pipe
US5824972A (en) * 1997-05-13 1998-10-20 Butler; Boyd L. Acoustic muffler
US6006520A (en) * 1997-10-06 1999-12-28 General Motors Corporation Pneumatic assisted brake apply system
US6520266B2 (en) * 2000-07-14 2003-02-18 Hilti Aktiengesellschaft Percussion electrical hand-held tool
US20040023014A1 (en) * 2002-08-05 2004-02-05 Williamson Bruce Scott Acoustical insulation material containing fine thermoplastic fibers
US20040126247A1 (en) * 2002-10-16 2004-07-01 Dietmar Broser Muffler for air compressor
US20040127129A1 (en) * 2002-12-31 2004-07-01 Shuiyuan Luo Grooved-shape monofilaments and the fabrics made thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100063924A1 (en) * 2008-09-09 2010-03-11 Ebay Inc. Payment application framework
US9715871B2 (en) * 2015-07-10 2017-07-25 Hyundai Motor Company Multilayer dash isolation pad having superior formability and sound absorption performance
CN115074912A (zh) * 2022-06-29 2022-09-20 瑞声光电科技(常州)有限公司 阻尼网布
WO2024000819A1 (fr) * 2022-06-29 2024-01-04 瑞声光电科技(常州)有限公司 Tissu maillé d'amortissement

Also Published As

Publication number Publication date
WO2006010401A1 (fr) 2006-02-02
EP1773638A1 (fr) 2007-04-18
EP1773638B1 (fr) 2018-09-12
CN1989036B (zh) 2011-06-22
DE102004036030A1 (de) 2006-02-16
CN1989036A (zh) 2007-06-27

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Legal Events

Date Code Title Description
AS Assignment

Owner name: WABCO GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HARTING, HENDRIK;REEL/FRAME:021117/0958

Effective date: 20080605

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION