EP0106481B1 - Garnissage des silencieux d'échappement d'automobile - Google Patents

Garnissage des silencieux d'échappement d'automobile Download PDF

Info

Publication number
EP0106481B1
EP0106481B1 EP83305077A EP83305077A EP0106481B1 EP 0106481 B1 EP0106481 B1 EP 0106481B1 EP 83305077 A EP83305077 A EP 83305077A EP 83305077 A EP83305077 A EP 83305077A EP 0106481 B1 EP0106481 B1 EP 0106481B1
Authority
EP
European Patent Office
Prior art keywords
air flow
silencer
silencer casing
passageway
glass fibres
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
Application number
EP83305077A
Other languages
German (de)
English (en)
Other versions
EP0106481A2 (fr
EP0106481A3 (en
Inventor
Norman Robinson
John Robert Grain
Ralph Huggett
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.)
Unipart Group Ltd
Original Assignee
Unipart Group 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 Unipart Group Ltd filed Critical Unipart Group Ltd
Publication of EP0106481A2 publication Critical patent/EP0106481A2/fr
Publication of EP0106481A3 publication Critical patent/EP0106481A3/en
Application granted granted Critical
Publication of EP0106481B1 publication Critical patent/EP0106481B1/fr
Expired legal-status Critical Current

Links

Images

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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like
    • 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
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/06—Inserting sound absorbing material into a chamber

Definitions

  • This invention relates to the packing of automobile exhaust silencer casings.
  • Such silencer casings contain packing in order to assist in silencer exhaust gases from the vehicle engine by virtue of conversion of kinetic energy of the exhaust gases into mechanical displacements of the packing and thus heating thereof.
  • One of the materials used to pack such silencer casings is glass fibre fluffed up into a wool-like consistency. This material can be produced by chopping continuous strands of glass fibre.
  • glass fibre material in wool-like form has been fed into a hopper, from which it passes along ducts before being metered into individual quantities, each suitable for packing one silencer.
  • the material has been prone to clog in the ducts and this has made the accurate metering of the material difficult, if the expense of weigh pans is to be avoided.
  • GB-A-1 279 472 discloses apparatus in which discrete lengths of glass fibre are fed into one end of an exhaust silencer casing whilst air is drawn therethrough by a suction pump connected to the other end.
  • EP-A-91 413 discloses apparatus in which a continuous strand of glass fibre is formed into a continuous "wool sausage" by means of a nozzle, this is then blown into one end of a silencer casing with the assistance of a suction fan connected to the other end of the silencer casing.
  • a method of packing an automobile silencer casing comprising the steps: establishing an air flow into end of the silencer casing then out of the other end through a perforated tube passing therethbugh; and allowing discrete lengths of glass fibres to be carried into the silencer casing in the air flow, characterised in that the air flow is passed through a restricted passageway before entering the silencer casing and a strand consisting of a plurality of continuous glass fibres is chopped into discrete lengths upstream of the restricted passageway so that as the discrete lengths are formed they are carried by the air flow through the restricted passageway and individual fibres in each discrete length separate from each other in a region of turbulance created thereby to form a wool-like material.
  • the strand, or roving advantageously contains at least one hundred, preferably at least a thousand, individual continuous glass fibres whose diameter is advantageously less than 30 microns and preferably less than 15 microns.
  • the fibres of the roving are preferably non-twisted.
  • the roving is driven from two rollers in contact with each other; this makes it easy to meter accurate quantities of glass fibre into each silencer casing, since it is only necessary to leave the rollers running for a certain period of time in order to know exactly how much glass fibre has been fed into the silencer.
  • a roller may also be provided for chopping the fibres, and they may be provided with the assistance of an air blast.
  • the air flows through a restricted passageway with a diameter of less than one i.nch (2.54 cm), before it enters the casing: the fibre being fluffed up in the region of turbulence created thereby.
  • the passageway may be formed by the narrow end of a tapering tubular member, the wide end of which receives the discrete lengths.
  • the taper may be from 15° to 75° included angle.
  • the air flow may be produced by means of a vacuum applied to where the air flow leaves the silencer casing
  • the vacuum applied to the silencer casing may be at least one inch of mercury (525N/m 2 ), preferably at least five inches of mercury (2624N/m z ), and advantageously between seven and a half and ten and a half inches of mercury (3936-6560N/m 2 ).
  • the air flow may be established by means of a jet of compressed air directed into the passageway.
  • the jet preferably feeds into the passageway at an angle of 7.5° to 37.5° to the axis of the tubular member.
  • the compressed air pressure should be at least 70 pounds per square inch (483kN/ M 2 ).
  • apparatus for packing an automobile exhaust silencer casing comprising: means for establishing an airflow into one end of the silencer casing and then out of other end through a perforated tube passing therethough; and means for supplying discrete lengths of glass fibre to be carried into the silencer casing in the air flow, characterised by means for positioning upstream of the silencer casing to chop a strand consisting of a plurality of continuous glass fibres into discrete lengths and by a restricted passageway through which the air flow passes before entering the silencer casing, the arrangement being such that, in use, as the discrete lengths are formed they are carried by the air flow through the restricted passageway so that individual fibres in each discrete length separate from each other in a region of turbulence created thereby to form a wool-like material.
  • the first embodiment of apparatus for packing a silencer casing 1 comprises a vacuum producing apparatus 2, a sealing apparatus 3 and a gun 4.
  • the casing of the silencer is circular in section, and one end of it has been closed by an end piece 5, which supports a perforated tube 6 running along the length of the silencer casing 1.
  • the end piece 5 supports a stub pipe 7 which connects to the rest of the exhaust assembly in use.
  • a similar end piece bearing a stub pipe is welded to the other end of the silencer when it has been packed.
  • the vacuum producing apparatus has a rubber sealing member 8 which fits tightly around the stub pipe 7.
  • the vacuum is produced by means of a centrifugal compressor (not shown) driven by a forty horse power (30 kW) motor (not shown). This apparatus produces a vacuum of around ten inches of mercury (5248N/m 2 ).
  • the sealing apparatus 3 likewise includes a sealing member 9 which seals against the open end of the casing and also blocks off the open end of the perforated tube 6, since this must not be filled with any packing material.
  • the sealing member has a circular aperture 10 whose diameter is inch (1.9 cm).
  • the roving fed into the gun 4 consists of around two thousand mono- filamentary continuous glass fibres, whose diameters lie between about six and twelve microns.
  • the fibres in the roving are parallel to each other, that is, the roving is not twisted.
  • the roving is fed from a spool (not shown) containing a length of about a couple of hundred meters of the roving.
  • the gun has an air-powered motor, contained in housing 11, to which rubber roller 12 is coaxially attached.
  • the roving is driven by means of rubber roller 12 and steel roller 13 which is hard in contact with roller 12.
  • the roving is cut into discrete lengths by means of a cutter 14 mounted diametrically through a further roller 15. Every half revolution of roller 15, the roving is severed at the point of contact with roller 12.
  • the rollers are contained in a housing 16 having an inlet 17 and an outlet 18.
  • the air exhaust from the air powered motor is fed into the housing 16 and, since the area of the outlet 18 is much greater than that of the inlet 17, the chopped lengths of roving are projected out of the gun with the aid of an air blast.
  • a silencer casing 1 to be filled is fitted onto the vacuum producing apparatus 2 and a sealing apparatus is brought up to the open end of the silencer.
  • the vacuum pump is started.
  • the gun 4 is then run and left running for a pre-determined period of time. This pre-determined period corresponds to the desired weight of glass fibre it is desired to pack the particular silencer with, and this can be calculated simply from the weight per unit length of the roving and the velocity at which the roving is fed through the gun.
  • the chopped lengths of roving projected from the gun are all sucked through the aperture 10 in the sealing member 9 because of the vacuum applied at the other end of the silencer casing, and the silencer is gradually filled with glass fibre. It has been found that the fibres of each chopped length of roving separate either before they enter the silencer casing or while they are in the silencer casing (probably the separation mainly takes place within the silencer), and this results in the production of the desired wool-like form of the glass fibre in the silencer.
  • the air flow within the silencer will of course be turbulent since it is being sucked through the perforated tube 6. The lengths of fibre do not pass into the tube 6 themselves.
  • the second form of apparatus differs from the first in that there is no vacuum required to draw the roving pieces into the silencer, rather they are drawn in carried in an air flow.
  • a silencer 20 to be filled is closed at the lower end as seen in the drawing by a closing plate 21 which has an aperture through which a perforated tube 22 of the silencer extends.
  • the silencer is mounted on a platform 23 through which air can pass.
  • the upper end of the silencer as seen in the drawing is connected to the apparatus, in particular to a closing plate 24 which carries a plug 25 for closing the end of the perforated tube 22.
  • the chopped strands of roving are fed into the silencer casing via a tube 26 and conical member 27, the tube 26 being sealed in an aperture in the closing plate 24.
  • a gun 28 supplies roving to the wide end of the conical member; the gun 28 is identical to the gun 4 of the first apparatus except that air does not assist in projecting the cut strands of roving from the gun, the cut strands being projected solely by the rotation of the rollers.
  • the roving used is the same as in the first apparatus.
  • a narrow tube 29 opens into the tube 26, and compressed air is supplied to its other end.
  • tube 26 three inches (7.62 cm) long, one half inch (1.27 cm) diameter
  • conical member 27 semi-angle 30°, diameter at wide end, three inches (7.62 cm); tube 29, angle to axis of conical member, 35°, air pressure 100 pounds per square inch (690 kN/m 2 ).
  • the narrow diameter of the tube 26 is important in "fluffing-up" the cut strands of roving, since only with a narrow diameter is sufficient turbulence created in the tube to achieve this. It is believed that the narrow opening 10 in the first apparatus is also responsible for creating the necessary turbulence. The narrower the diameter, the smaller the compressed air pressure orvacuum needed to fluff-up the fibre, but if the diameter is too small, the restriction is prone to clogging.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Claims (15)

1. Méthode de garnissage d'un carter de silencieux d'automobile (1; 20) comprenant les étapes suivantes: un écoulement d'air est établi entrant par une extrémité du carter de silencieux (1; 20) puis sortant par l'autre extrémité par l'intermédiaire d'un tube perforé (6; 22) traversant et des longueurs discrètes de fibres de verre sont admises et transportées dans le carter de silencieux (1; 20) par l'écoulement d'air, caractérisée en ce que l'écoulement d'air passe à travers un passage restreint (10; 26) avant d'entrer dans le carter de silencieux (1; 20) et un fil consistant en un certain nombre de fibres de verre continues est coupé en longueurs discrètes en amont du passage restreint (10; 26) de telle sorte que, lorsque les longueurs discrètes sont formées, elles sont portées par l'écoulement d'air à travers le passage restreint (10; 26) et les fibres individuelles dans chaque longueur discrète se séparent les unes des autres dans une région de turbulence créée, pour ainsi former un matériau d'aspect laineux.
2. Méthode suivant la revendication 1, caractérisée en ce que le fil consiste en au moins une centaine de fibres de verre continues.
3. Méthode suivant la revendication 2, caractérisée en ce que le fil consiste en au moins un millier de fibres de verre continues.
4. Méthode suivant l'une quelconque des revendications 1 à 3, caractérisée en ce que les diamètres des fibres de verre continues sont inférieures à 30 microns.
5. Méthode suivant la revendication 4, caractérisée en ce que les diamètres des fibres de verre continues sont inférieures à 15 microns.
6. Méthode suivant l'une quelconque des revendications précédentes, caractérisée en ce que les fibres de verre continues ne sont pas torsadées dans le fil.
7. Méthode suivant l'une quelconque des revendications précédentes, caractérisée en ce que le fil est alimenté entre deux rouleaux (12, 13) en prise l'une avec l'autre, l'un d'eux (12) étant entraîne.
8. Méthode suivant la revendication 7, caractérisée en ce que le fil passe entre une paire de rouleaux (12, 13) dont l'un (15) possède une lame (14) montée diamétralement au travers de celui- ci.
9. Méthode suivant la revendication 7 ou 8, caractérisée en ce que les longueurs discrètes sont projetées à travers le passage (10; 26) à l'aide d'un souffle d'air.
10. Méthode suivant l'une quelconque des revendications précédentes, caractérisée en ce que le diamètre du passage (10; 26) est inférieur à 1 pouce (2,54 cm).
11. Méthode suivant la revendication 10, caractérisée en ce que le passage (26) est formé par l'extrémité étroite d'un tube effilé (27), dont l'extrémité large reçoit les longueurs discrètes.
12. Méthode suivant l'une quelconque des revendications précédentes, caractérisée en ce que l'écoulement d'air est établi au moyen du vide appliqué à l'endroit où l'écoulement d'air quitte le carter de silencieux (1; 20).
13. Méthode suivant l'une quelconque des revendications 1 à 11, caractérisée en ce que l'écoulement d'air est établi au moyen d'un souffle d'air comprimé dirigé dans le passage (10; 26).
14. Méthode suivant les revendications 11 et 13, caractérisée en ce que le souffle est incliné par rapport à l'axe du tube effilé (27).
15. Appareil pour garnir un carter de silencieux d'échappement automobile (1; 20) suivant la méthode de la revendication 1 comprenant des moyens (2; 29) pour établir un écoulement d'air entrant par une extrémité du carter de silencieux (1; 20) puis sortant par l'autre extrémité à travers un tube perforé (6; 22) traversant; et des moyens (4) pour fournir des longueurs discrètes de fibre de verre devant être portées dans le carter de silencieux (1; 20) par l'écoulement d'air, caractérisé par des moyens (4) pour se positionner en amont du carter de silencieux (1; 20) afin de couper un fil consistant en un certain nombre de fibres de verre continues pour obtenir des longueurs discrètes, et par un passage restreint (10; 26) au travers duquel l'écoulement d'air passe avant d'entrer dans le carter de silencieux (1; 20), l'agencement étant tel que, en utilisation, lorsque les longueurs discrètes sont formées, elles sont portées par l'écoulement d'air à travers le passage restreint (10; 26) de telle sorte que les fibres individuelles dans chaque longueur discrète se séparent les unes des autres dans une région de turbulence créée pour ainsi former un matériau d'apparence laineuse.
EP83305077A 1982-09-10 1983-09-01 Garnissage des silencieux d'échappement d'automobile Expired EP0106481B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8225865 1982-09-10
GB08225865A GB2127093B (en) 1982-09-10 1982-09-10 Packing automobile exhaust silencer casing

Publications (3)

Publication Number Publication Date
EP0106481A2 EP0106481A2 (fr) 1984-04-25
EP0106481A3 EP0106481A3 (en) 1984-07-18
EP0106481B1 true EP0106481B1 (fr) 1987-01-21

Family

ID=10532835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83305077A Expired EP0106481B1 (fr) 1982-09-10 1983-09-01 Garnissage des silencieux d'échappement d'automobile

Country Status (5)

Country Link
EP (1) EP0106481B1 (fr)
JP (1) JPS59131717A (fr)
CA (1) CA1240131A (fr)
DE (1) DE3369360D1 (fr)
GB (1) GB2127093B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8330799D0 (en) * 1983-11-18 1983-12-29 Tba Industrial Products Ltd Glass fibre products
EP0146249B1 (fr) * 1983-11-18 1989-01-18 TBA Industrial Products Limited Produits en fibres de verre
GB2162577B (en) * 1984-02-14 1987-07-01 Unipart Group Ltd Method of and apparatus for packing exhaust silencer casings
US6446750B1 (en) * 2001-03-16 2002-09-10 Owens Corning Fiberglas Technology, Inc. Process for filling a muffler shell with fibrous material
US6581723B2 (en) * 2001-08-31 2003-06-24 Owens Corning Composites Sprl Muffler shell filling process, muffler filled with fibrous material and vacuum filling device
US6607052B2 (en) * 2001-09-12 2003-08-19 Owens Corning Composites Sprl Muffler shell filling process and muffler filled with fibrous material
US8590155B2 (en) 2009-06-03 2013-11-26 Ocv Intellectual Capital, Llc Apparatus for and process of filling a muffler with fibrous material utilizing a directional jet
JP6317561B2 (ja) * 2013-10-16 2018-04-25 株式会社Ｓｕｂａｒｕ 繊維充填装置および繊維充填方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0091413A2 (fr) * 1982-04-06 1983-10-12 Scandinavian Glasfiber AB Récipient à travers lequel s'écoule un gaz, préférentiellement un silencieux, avec remplissage de fibres de verre, et procédé et dispositif pour le remplir

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1279472A (en) * 1969-10-30 1972-06-28 Harmo Ind Ltd Improvements in or relating to absorbent devices

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0091413A2 (fr) * 1982-04-06 1983-10-12 Scandinavian Glasfiber AB Récipient à travers lequel s'écoule un gaz, préférentiellement un silencieux, avec remplissage de fibres de verre, et procédé et dispositif pour le remplir

Also Published As

Publication number Publication date
EP0106481A2 (fr) 1984-04-25
CA1240131A (fr) 1988-08-09
GB2127093B (en) 1986-01-29
JPS59131717A (ja) 1984-07-28
DE3369360D1 (en) 1987-02-26
GB2127093A (en) 1984-04-04
EP0106481A3 (en) 1984-07-18

Similar Documents

Publication Publication Date Title
EP0146249B1 (fr) Produits en fibres de verre
US4202163A (en) Spinning process and apparatus
US6251185B1 (en) System for delivering chopped fiberglass strands to a preform screen
US4239397A (en) Method for manufacturing shotcrete structures using a material having high impact resistance and optimum deformation properties
US5118226A (en) Method for passing a cable, a wire or an optical fiber through a passage
US4414707A (en) Sausage casing removal apparatus
SE445942B (sv) Ljuddempare samt sett och anordning for framstellning av denna
CA1240131A (fr) Garnissage des silencieux d'echappement
EP0153100B1 (fr) Procédé et appareil pour le garnissage des silencieux d'échappement
US5069582A (en) Vacuum producing device
US20190085798A1 (en) Vehicle Air Intake Housing
US3033711A (en) Carbo-blast method and unit
CN1035632C (zh) 纤维材料特别是棉花的开清设备
GB2158001A (en) A moulding for inserting into an exhaust silencer casing
GB2127929A (en) Apparatus for use in reviving a fluid passage
US3013525A (en) Apparatus for spraying liquid onto fibers
CN101850342A (zh) 一种物料分选机的剔除装置
US5256375A (en) Mixing device
JPH0637264B2 (ja) 織物用繊維ストランドを圧縮し且フィード挾持部内へ自動的に導入する装置
EP0181157B1 (fr) Buse de texturation de fil
CN115770758B (zh) 卷材除尘装置和卷材加工设备
US4383349A (en) Opening bonded glass fiber bundles
US2581467A (en) Device for cutting staple fiber
US20060087910A1 (en) Water injection method and apparatus for concrete mixer
US3985053A (en) Device for the opening and conveyance of freshly cut staple fiber bundles

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR GB IT

17P Request for examination filed

Effective date: 19841224

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3369360

Country of ref document: DE

Date of ref document: 19870226

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19890831

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19900727

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19900901

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19901130

Year of fee payment: 8

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19920602

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230529