Disposable thermal shield

• US 5,550,338 A
• Filed: 05/30/1995
• Issued: 08/27/1996
• Est. Priority Date: 11/12/1990
• Status: Expired due to Fees

• Current Assignee: Matec Holding AG
• Original Assignee: Matec Holding AG
• Inventors: Hielscher, Peter
• Primary Examiner(s): Gillner, M. L.
• Assistant Examiner(s): Lee, Eddie C.
• Application Number:
  US08/453,106
• Time in Patent Office: 455 Days
• Field of Search: 181/207, 181/284, 181/286, 181/287, 181/290, 181/291, 181/294
• US Class Current: 181/290
• CPC Class Codes: B32B 15/04 comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042
• CPC Class Codes: B32B 15/14 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2266/06 Open cell foam
• CPC Class Codes: B32B 2305/026 Porous
• CPC Class Codes: B32B 2305/38 Meshes, lattices or nets
• CPC Class Codes: B32B 2305/70 Scrap or recycled material
• CPC Class Codes: B32B 2307/102 Insulating
• CPC Class Codes: B32B 2307/304 Insulating
• CPC Class Codes: B32B 2307/734 Dimensional stability
• CPC Class Codes: B32B 2311/24 Aluminium
• CPC Class Codes: B32B 2605/00 Vehicles
• CPC Class Codes: B32B 3/10 characterised by a discontinuous layer, i.e. formed of separate pieces of material
• CPC Class Codes: B32B 3/266 characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: B32B 5/22 characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed layer formed of natural mineral fibres or particles next to a foam layer B32B19/047, next to a layer made of particles B32B19/048, or next to a fibrous or filamentary layer B32B19/06; paper layer or cardboard layer next to a paper layer or cardboard layer B32B29/005, next to a foam layer B32B29/007, next to a fibrous or filamentary layer B32B29/02, or next to a particulate layer B32B29/04
• CPC Class Codes: B60R 13/08 Insulating elements, e.g. for sound insulation sound insulating linings for trains B61D17/185; drivers' cabs for load-carrying vehicles insulated against vibrations or noise B62D33/0604; thermal or acoustic insulation of engines F02B77/11; damping of sounds using compensation by electro-acoustic methods G10K11/178
• CPC Class Codes: B60R 13/0876 for mounting around heat sources, e.g. exhaust pipes
• CPC Class Codes: F16L 59/08 Means for preventing radiation, e.g. with metal foil
• CPC Class Codes: G10K 11/168 Plural layers of different materials, e.g. sandwiches

Abstract

The present thermal shield comprises, in essence, a dimensionally stable substrate (2) on which is disposed a sound-absorbing thermal insulating layer (3). This thermal insulating layer is provided with a protective coating (4). According to the disclosure, all layers of the thermal shield consist of a light metal, particularly of aluminum or an aluminum alloy. For acoustic reasons, the thermal insulating layer is made up of an open-pore structure, especially of aluminum wool. In a further development, the thermal insulating layer is made up of several plies, and the dimensionally stable substrate (2) is perforated. A thin protective layer (5) acting as a foil absorber is arranged between the substrate (2) and the thermal insulating layer (3). This thermal shield is utilized with preference in the automobile industry.

Claims

1. A disposable, sound-absorbing vehicle thermal shield for the acoustic and thermal insulating of vehicle parts, said shield consisting essentially of a relatively thick, partially perforated, dimensionally stable substrate in the form of a sheet of metal, a multi-ply, sound-absorbing thermal insulating layer built up of several plies of a light metal material having an open pored structure with a porous metal foil being provided between plies thereof as an interlayer of said insulating layer, said thermal insulating layer being carried by said substrate, a protective cover in the form of a relatively thin layer of a light metal provided at least on a side of said thermal insulating layer facing away from the substrate, and means for holding together said dimensionally stable substrate, said sound-absorbing thermal insulating layer and said protective cover, and wherein said dimensionally stable substrate, said multi-ply, sound-absorbing thermal insulating layer, and said protective cover layer are each manufactured from the same material, namely a readily disposable light metal having a melting point above 600°

C. whereby the thermal shield is readily disposable for recycling the material thereof without separation from one another and sorting of said dimensionally stable substrate, said multi-ply, sound-absorbing thermal insulating layer and said protective cover layer.

2. Vehicle thermal shield according to claim 1, wherein the thermal insulating layer is built up of several plies and comprises at least one ply of aluminum wool.

3. Vehicle thermal shield according to claim 1, wherein the thermal insulating layer is built up of several plies and comprises at least one ply of an aluminum meshwork.

4. Vehicle thermal shield according to claim 1, wherein the thermal insulating layer is built up of several plies and comprises at least one ply of aerogel.

5. Vehicle thermal shield according to claim 1, wherein the thermal insulating layer is built up of several plies and comprises as said porous metal foil at least one foil provided with perforation protrusions.

6. Vehicle thermal shield according to claim 1, wherein the thermal insulating layer is shaped in the manner of a quilt.

7. Vehicle thermal shield according to claim 1, wherein the substrate consists of an aluminum sheet with a thickness of 0.3 to 1.5 mm.

8. Vehicle thermal shield according to claim 7, wherein the aluminum sheet is partially perforated.

9. Vehicle thermal shield according to claim 8, wherein a thin protective layer of an aluminum foil having a thickness of 0.01 to 0.02 mm lies between the perforated aluminum sheet and the thermal insulating layer.

10. Vehicle thermal shield according to claim 7, wherein the protective cover is an aluminum foil having a thickness of 0.05 to 0.2 mm.

11. Vehicle thermal shield according to claim 1, wherein said means for holding together is also formed from said readily disposable light metal.

12. Vehicle thermal shield according to claim 1, wherein said several plies of said sound-absorbing thermal insulating layer are glued together with recyclable adhesive.

13. Vehicle thermal shield according to claim 1, wherein said readily disposable light metal is aluminum.

14. Vehicle thermal shield according to claim 1, wherein said protective cover layer is a coating of said readily disposable light metal applied to at least said side of said thermal insulating layer facing away from said substrate.

15. Vehicle thermal shield according to claim 1, wherein said protective cover layer is a foil made of said readily disposable light metal.