EP1877281A1 - Procede d'isolation de corps creux de vehicule - Google Patents
Procede d'isolation de corps creux de vehiculeInfo
- Publication number
- EP1877281A1 EP1877281A1 EP06726247A EP06726247A EP1877281A1 EP 1877281 A1 EP1877281 A1 EP 1877281A1 EP 06726247 A EP06726247 A EP 06726247A EP 06726247 A EP06726247 A EP 06726247A EP 1877281 A1 EP1877281 A1 EP 1877281A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hollow body
- sheath
- vehicle
- insulating material
- openings
- 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- Withdrawn
Links
- 238000009413 insulation Methods 0.000 title claims description 20
- 238000000034 method Methods 0.000 title claims description 19
- 239000011810 insulating material Substances 0.000 claims description 28
- 239000012530 fluid Substances 0.000 claims description 18
- 238000004378 air conditioning Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- 238000005253 cladding Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000012212 insulator Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000005304 joining Methods 0.000 claims 1
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 241000282341 Mustela putorius furo Species 0.000 description 1
- 240000005428 Pistacia lentiscus Species 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000012764 mineral filler Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
Definitions
- the present invention relates generally to the field of hollow body insulation for vehicles. More particularly, the invention relates to a method for thermal and / or acoustic insulation of a tubular hollow body of a motor vehicle comprising a step in which is introduced inside the hollow body an insulating material.
- the invention also relates to an assembly comprising a tubular hollow body of a vehicle, such as a rocker, and an insulating material housed inside said hollow body.
- the hollow bodies of a vehicle are empty areas created in walls of this vehicle.
- the hollow bodies are for example necessary to the rigidity of the vehicle and / or allow to create functional or aesthetic forms.
- a vehicle body is typically the rocker that is located at the side edges of the vehicle floor, and which joins the floor of the vehicle and the lower parts of doors.
- a hollow body may also be located on the lateral edges of the roof of the vehicle at the junction between this roof and the doors of the vehicle.
- these hollow bodies must be isolated acoustically and / or thermally to control the thermal and acoustic conditions inside the passenger compartment of the vehicle. This is the reason why vehicle manufacturers have developed various solutions for insulating hollow bodies of vehicles.
- An isolation method of the previously defined type is described, for example, in patent document FR 2826093.
- This prior art insulation process consists in introducing foam flakes inside the hollow body in order to provide insulation at phonic purpose.
- a disadvantage of this type of insulation process is that a large volume of insulation is used.
- the present invention aims to provide an insulation method and an assembly comprising an insulated hollow body allowing at least thermal insulation of the hollow body while reducing the volume of insulation used.
- the isolation method of the invention which is also in accordance with the generic definition given in the preamble defined above, is essentially characterized in that said insulating material introduced inside the hollow body is a material thermally insulating, and in that this material is formed so as to obtain, inside said body, a sheath having at least two openings accessible from the outside of said hollow body thus creating a thermally insulated air-conditioning duct, inside the hollow body of the vehicle.
- the whole of the invention is essentially characterized in that the insulating material is a thermal insulator having the shape of a sheath comprising at least one at least two openings accessible from the outside of the hollow body, at least one of these openings being adapted to be connected to a fluid production unit air-conditioned, thus forming heat-insulated air-conditioning duct, inside the hollow body.
- the insulating material is a thermal insulator having the shape of a sheath comprising at least one at least two openings accessible from the outside of the hollow body, at least one of these openings being adapted to be connected to a fluid production unit air-conditioned, thus forming heat-insulated air-conditioning duct, inside the hollow body.
- the fact of forming an insulating sheath in a hollow body makes it possible to reduce the volume of insulation necessary for isolating the hollow body with respect to the volume required when the hollow body of insulation is completely filled.
- the empty space located inside the sheath is advantageously used for the transport of conditioned fluid inside the hollow body. Thanks to the invention, it is therefore possible to create air conditioning ducts in hollow bodies of the vehicle which are normally lost and unused areas. The invention therefore saves space compared to air conditioning duct integration solutions which consist of fixing these ducts under the floor of the vehicle. Thanks to the invention the air conditioning ducts are integrated at lower cost to the vehicle while using normally empty vehicle spaces. For example, it is possible for the hollow body to be a sill of the vehicle.
- the vehicle sill is a hollow body extending between the front and the rear of the vehicle which is particularly useful for transporting an air-conditioned fluid along the length of the vehicle without having to form a specific air conditioning duct directly below the vehicle. floor of the vehicle.
- the rocker also has the advantage of having a substantially constant cross section along its length, which makes it possible to limit pressure drops in the air conditioning circuit.
- this method can be implemented after assembly of the vehicle by introducing a spray nozzle into the already formed hollow body.
- This method of forming the air conditioning duct is particularly useful when the sheath to be formed is long and tortuous. In this case the nozzle used will be mounted on a flexible pipe and will be introduced in the manner of a plumbing ferret.
- the insulating material used may be a polymeric material such as an elastomer, a thermoplastic material, thermosetting, expandable or not.
- thermoformable insulating material it is also possible to choose a thermoformable insulating material and to set up this insulating material so as to form a cladding of thermoformable material around a pipe of pressurized fluid and then to introduce the cladding thermoformable material to the inside the hollow body, and deforming this cladding by heating it and injecting pressurized fluid into the pipe until the sheathing comes against internal walls of the hollow body, then cool the sheath to form the sheath inside. hollow body.
- the insulating material thermoplastic polymer material
- Heating such as a heater located in the pressure fluid line or in the vicinity of the hollow body is implemented thereby making it possible to make the insulating material malleable.
- the malleable insulating material Under the action of pressure outgoing fluids from the pipe by one or more nozzles, the malleable insulating material is pressed against the walls of the hollow body. Once the material has cooled, it hardens, thus forming the air conditioning duct in the hollow body.
- insulators adapt to the internal shape of the hollow body
- the insoling material is particularly well assembled with this hollow body thus avoiding vibrations;
- the insulation protects the inside of the hollow body from corrosion
- the assembly between the hollow body and the insulating material is without a particular assembly part.
- the sheath in order to preform the sheath, at least two preformed shells of elongated shape are assembled together, each of these shells being open along its length, thus making it possible to form an elongated sheath.
- This embodiment makes it possible to form profiles inside the non-homothetic sheath with respect to external profiles of the sheath. This makes it possible to respond to shape constraints external to the sheath without having to modify the inside of this sheath.
- This last embodiment is implemented when it is desired to integrate a preformed sheath into a hollow body that does not allow easy introduction of the plastic sheath. In this case it may be preferred to introduce the preformed insulation sheath before closing the hollow body.
- FIGS. 1 shows a vehicle with an assembly according to the invention, the air conditioning duct being made in the underside of the vehicle;
- Figure 2 shows an embodiment of the insulating sheath by spraying insulating material in a hollow body;
- FIGS. 1 shows a vehicle with an assembly according to the invention, the air conditioning duct being made in the underside of the vehicle;
- Figure 2 shows an embodiment of the insulating sheath by spraying insulating material in a hollow body;
- FIG. 3a, 3b and 3c show steps for producing an insulating sheath by blow molding in a hollow body according to the method of the invention
- Figure 4 shows a preformed sheath not inserted into the hollow body
- Figure 5 shows a sectional view of a vehicle underbody after placing a preformed sheath in the underside
- Figure 6 is a sectional view of a mold for producing a preformed sheath in two parts.
- the hollow body of FIG. 1 is a metal underbody 17 of a vehicle. At least one of the openings of the sheath is connected to an air-conditioned fluid production unit 16 implanted on the vehicle (the cooling unit denotes, in the present description of the invention, a heating group or a group of air conditioner) .
- the air conditioning / heating fluid can pass from the front to the rear of the vehicle through the interior of the rocker 17 which avoids having to fix a sheath under the floor of the vehicle exclusively dedicated to air conditioning.
- Figure 2 is a longitudinal sectional view of a metal hollow body of a vehicle inside which is sprayed a thermal insulator. This spraying is done using a nozzle 6 mounted at the end of a pressure pipe through which the insulator passes 2.
- the thickness of the layer of insulating material sprayed depends on projection parameters such as the speed of advance of the nozzle 6 in the hollow body, the projection pressures, the diameter of the nozzle orifices, the flow rate of the insulation, the nature of the insulation (viscosity of the product and rate of expansion).
- the insulation solidifies.
- Figures 3a to 3c show longitudinal sectional views of a hollow body in which an insulating sheath is installed by a blowing / thermoforming technique of a cladding.
- FIG. 3a describes the insertion into the hollow body 1 of a pressurized fluid line 8 around which is positioned a sheath 9 made of thermoformable insulating material.
- the insulating material is heated by a heating means which may for example be a hot fluid circulating in the pressurized fluid line 8.
- a heating means which may for example be a hot fluid circulating in the pressurized fluid line 8.
- the cladding 9 When the cladding 9 is sufficiently hot, it becomes malleable and then a high fluid pressure in the pipe 8.
- the pressurized fluid exits the pipe by lateral perforations distributed along the length of this pipe. The sheathing then plates against the inner wall 7 of the hollow body and then the sheath is cooled.
- FIG. 4 shows a perspective view of a preformed sheath 11 before assembly in the hollow body.
- This sheath is composed of two shells 13a and 13b complementary and elongated shapes. Openings are formed at the ends of the sheath 11 to allow its connection with air conditioning / heating elements. The ends of the sheath 11 in which the openings are formed are curved to open substantially perpendicular to the longitudinal axis of the sheath 11.
- FIG. 5 represents a cross section of a vehicle underbody 17 in which is inserted a preformed sheath 11 of FIG. 4.
- the underbody 17 is formed of two parts 15a, 15b which are initially separated and moved away from each other.
- the preformed plastic sheath 11 is introduced between the two parts 15a, 15b of the hollow body not yet assembled together.
- a wedging piece 18 is disposed between one of the two parts and the preformed sheath 11.
- the function of this wedge member is to avoid vibrations / displacements of the sheath 11 relative to the hollow body.
- the wedging piece 18 must have a shape and a constituent material capable of absorbing vibrations.
- This wedging piece 18 is either flexible and can then be in direct contact with the sheath 11, which is rigid, and then it comprises an expansive foam pad-type damper placed against the sheath 11.
- Such a damper may be polyurethane foam, thermosetting or thermoplastic foam or elastomer.
- the wedging piece 18 and the sheath 11 placed between the parts 15a and 15b of the hollow body are then brought closer to each other and assembled together so that the wedging piece 18 is wedged and clamped between the two hollow body parts thus allowing its retention in position.
- the parts 15a and 15b are assembled by welding or gluing.
- the sheath 11 may be fixed at least at its openings on one of the hollow body portions to be held in abutment with passages 12 formed in the hollow body. This fixing of the preformed sheath can be done by bolting as in the embodiment of FIG. 5.
- the sheath is implanted in the metal hollow body during the assembly operation of the vehicle body and is therefore subject to the various stages of the anticorrosive protection process of the metal body, and cooking of paints and mastics.
- the exposure temperatures of the body during the cycles can reach 195 ° C.
- Such insulating materials are typically polyamides reinforced with glass fibers and / or mineral fillers, or saturated polyesters (PET or PBT) reinforced with mineral or glass fillers.
- PET or PBT saturated polyesters
- any other polymeric material supporting at least an exposure of the order of 30 minutes at 195 ° C could be used for this type of application.
- Figure 6 shows a sectional view of an injection mold 14 for producing two preformed shells 13a and 13b by injecting a plastic material into the mold.
- These shells 13a and 13b are both made at the same time in the same mold and each have a joint plane 19.
- joints 19 have forms complementary to each other so as to allow the assembling of the shells against each other to form a preformed sheath 11 as shown in FIGS. 4 and 5.
- These jointing planes are planar zones projecting from the outside of the shells, which may for example be used to assemble the shells together and / or the sheath against at least a portion 15a, 15b of the hollow body 1.
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0504415A FR2885094B1 (fr) | 2005-04-29 | 2005-04-29 | Procede d'isolation de corps creux de vehicule. |
| PCT/FR2006/050225 WO2006117485A1 (fr) | 2005-04-29 | 2006-03-14 | Procede d'isolation de corps creux de vehicule |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1877281A1 true EP1877281A1 (fr) | 2008-01-16 |
Family
ID=35219277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06726247A Withdrawn EP1877281A1 (fr) | 2005-04-29 | 2006-03-14 | Procede d'isolation de corps creux de vehicule |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1877281A1 (fr) |
| FR (1) | FR2885094B1 (fr) |
| WO (1) | WO2006117485A1 (fr) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2744978B1 (fr) * | 1996-02-21 | 1998-05-07 | Peugeot | Dispositif formant plancher pour vehicule automobile |
| FR2774351B1 (fr) * | 1998-01-30 | 2000-03-24 | Renault | Agencement de la partie inferieure de l'habitacle d'un vehicule automobile |
| FR2826093B1 (fr) * | 2001-06-15 | 2003-08-08 | Peugeot Citroen Automobiles Sa | Procede d'isolation acoustique d'un corps creux, tel qu'une partie de caisse de vehicule automobile |
| FR2861669B1 (fr) * | 2003-10-30 | 2006-02-17 | Cera | Element de faux plancher multifonction comprenant des patins en mousse formant ressort d'un systeme masse-ressort |
-
2005
- 2005-04-29 FR FR0504415A patent/FR2885094B1/fr not_active Expired - Fee Related
-
2006
- 2006-03-14 EP EP06726247A patent/EP1877281A1/fr not_active Withdrawn
- 2006-03-14 WO PCT/FR2006/050225 patent/WO2006117485A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006117485A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006117485A1 (fr) | 2006-11-09 |
| FR2885094B1 (fr) | 2009-01-16 |
| FR2885094A1 (fr) | 2006-11-03 |
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Legal Events
| Date | Code | Title | Description |
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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: 20071129 |
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| AK | Designated contracting states |
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| 17Q | First examination report despatched |
Effective date: 20080310 |
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| DAX | Request for extension of the european patent (deleted) | ||
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
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| 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 |
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| 18D | Application deemed to be withdrawn |
Effective date: 20090603 |