DE7912776U1 - MULTI-LAYER DE-DRILLING COVERING - Google Patents

Description

The invention relates to a multilayer anti-drumming covering sheet.

The purpose of such a multi-layer anti-drumming covering sheet is to cover documents, especially floor panels and the like Metal sheet of the transmission and cardan tunnel of automobiles, i.e. the vibration ability of these documents or Reduce sheet metal and dampen the vibrations.

For this purpose, the documents or metal sheets of the motor vehicles are covered with so-called anti-drumming foils. This Entdröhnungsbelagbahnen are preferably made of bituminous films of a few Mi ll i m etern thickness. However, they should not only cause the sheet metal to be deadened, but should also consist of a manufacturing process integrated into the L-ack drying in the automobile plant. To do this, the anti-drumming foils are first placed on the sheet metal of the Eoh body; This applies in particular to the cardan tunnel, on which its own anti-drumming film is placed, similar to a saddle on a horse's back. Then the body-in-white runs through the paint oven. Temperatures there are around 18o C. The average processing time is around 30 minutes. In this lacquer oven, the anti-drumming film is supposed to melt onto the sheet metal of the body. For this purpose, anti-drumming foils are used, which plasticize in the lacquer oven and can therefore cling to the sheet metal contours, so that a sound-conducting connection is created between the body sheet and the anti-drumming foil.

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In particular for the strongly curved cardan tunnel, the plasticizing properties and flow properties are good Anti-drumming foils required so that the adjacent floor parts are also covered by the anti-drumming foil. Kick it a number of technological problems, which, particularly in the case of the cardan tunnel, are caused by that the sides of the cardan tunnel are perpendicular. This has the consequence that the on the vertical sides of the cardan tunnel Foil areas located after the usually loose laying is not in contact with the vertical sheet metal parts come and consequently do not melt during plasticizing can and drain.

Another problem is that the anti-drumming film for a cardan tunnel must often have a free cutout to an opening in the top of the cardan tunnel To create space. When plasticizing the anti-drumming film, it is now often observed that it closes at the edge the side parts of the cardan tunnel folds away from this or folded over and melts untidily with the sheet metal. If, on the other hand, you choose he'.ne anti-drumming film, the one in the varnish oven does not become soft enough not to fold away on the vertical walls of the cardan tunnel, the anti-drumming film melts together not at all at the strongly curved points of the base or the cardan tunnel sheet metal, because it does not follow the curvatures.

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Another cause of the error is that the stiffly protruding outer parts of the anti-drumming film are initially in the floor area melt next to the cardan tunnel before the film plasticizes and adapts to the contour of the cardan tunnel can. The film is then stretched freely hanging from the upper part of the cardan tunnel to the floor; at the moment the softening then tears the film under the action of gravity.

The object of the invention is to create an anti-drumming film, which, as described above, can be melted onto the substrate or body panel in the lacquer oven, which continues to be also adapts perfectly to strongly curved body parts, such as a cardan tunnel, and also on vertical ones Sheet metal parts melted flawlessly and especially on steeply inclined or vertical sheet metal parts in the plasticized State cannot tear.

According to the invention, this object is achieved in that a multilayer anti-drumming covering sheet, namely a bitumen and / or plastic film and / or a bitumen-plastic mixed film is laminated with a coarse-meshed, tensile fabric. Tuck lamination is prevented by the tensile fabric on the one hand, tearing open the film and, on the other hand, it keeps the anti-drumming film in its plasticized state at the top of a steeply sloping or vertical

Sheet metal part, so that the anti-drumming foil part hanging there
cannot slide down «Also, because of the lamination
achieves that the film does not fold away in the beginning area of a steep drop outwards and upwards. Finally, the tensile strength of the film is plasticized so-far increased I that a tearing of the film under the influence of gravity, f in the range of perpendicular edges is impossible =

f Individual areas remain in areas of the base or the sheet metal in which a highly localized adaptation of the anti-drumming layer to the shape of the base is necessary, especially to the beads embossed there
the anti-drumming covering sheet according to the invention unlaminated. 1

In a preferred embodiment, only the joint is to the I telbereich "Entdröhnungsbelagbahn laminated with tissue;
On both sides of the central area there remains an unclad film strip, which is therefore particularly fluid
remains. I.

This ensures that even in these areas
a perfect bead entry is achieved. Since a coarse-meshed, tensile fabric still allows a certain * shear deformation, there is still ^! an adaptation to the shape of the sheet metal base is possible.

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In a further “preferred embodiment, the with Fabric-laminated central area of the anti-drumming film according to the invention on cutouts; these excerpts are the Adapted to the requirements of the curved sheet metal part to be deadened. In particular with cardan tunnels corresponds to Example of a section in the anti-drumming film according to the invention an opening in the tunnel roof, through which the gear stick is usually passed. Appropriately they are Edges of the cutout again with a coarse mesh Reinforced fabric. This makes them particularly resistant to deformation .

The multi-layer anti-drumming covering sheet according to the invention is formed in particular by a laminated film, which at elevated temperature, as is usually the case in the paint oven prevails, namely around 180 ° C, becomes plastic, but at room temperature is solidified; on the other hand, the lining fabric remains solid both at the elevated temperature and at the room temperature. Preferably a Fabric made of jute used; however, a tensile strength and temperature-resistant paper and / or a jute paper can also be used come into use. These lamination agents can be both be laminated on both the top and the bottom of the film. However, the film can also be on an or

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if necessary, also with a plastic film on both sides be concealed. So that the edges of the multilayered anti-drone covering sheet according to the invention are tensile strength, are in a preferred embodiment also the I edge areas the multilayer anti-drumming covering sheet according to the invention is particularly laminated. The lamination fabric, insü

especially the paper, can also be impregnated with fire retardants.

An embodiment of the multilayer Entdriihnurgsbelagbahn according to the invention is shown in the following figures, which are described in more detail. Show it:

FIG. 1 is a perspective view of the anti-drumming sheet according to the invention,

FIG. 2 shows the schematic cross section of an inventive melted onto a base Anti-drumming membrane,

FIG. 3 shows the plan view of an anti-drumming covering sheet according to the invention, in which only the middle area is covered with fabric,

FIG. 4 the top view of a development according to the invention

droning track, as shown in Figure 3

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det is, but with a cutout in the middle area,

Figure 5 ö.en a schematic cross section of an arched Underlay melted anti-drumming covering sheet according to the invention, as in Pigur 2, however with fabric on top.

In Figure 1, a large-meshed, tensile fabric is shown in the foreground with the reference number 1. This tissue serves to cover the overlying film 2. This film 2 is in particular a bitumen and / or plastic film that is plasticized in the varnish oven. at the film 2 can also be a multi-layer film, which is also laminated on its upper side can be.

FIG. 2 shows how the anti-drumming covering sheet according to the invention has adapted to a strongly curved base. The film 2 has flowed through the coarse-meshed fabric 1 in the plasticized state, so that it is melted onto the base 3. The tensile, coarse-meshed fabric 1 has ensured that the anti-drumming covering sheet according to the invention in the area of inclination and. of the vertical part of the base 3, 7.B. of the cardan tunnel blecbep, neither rips open nor pulls apart so far,

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In FIG. 3, a preferred embodiment of the anti-drumming covering sheet according to the invention is shown in plan view, in which only the central area 4 is laminated with fabric 1. As a result, 4 strips of non-laminated film 2 remain on both sides of the central area. The central area 4 is dimensioned so that it covers the curved part of the sheet metal part, while the uncovered side areas of the anti-drumming film according to the invention come to rest on the edge parts of the sheet metal part to be deadened. In the plasticized state of the laminated central portion 4 guarantees the form-stable fusion of Entdröhnungsbelagbahn the invention with the curved sheet metal parts, \ while the unclad edge portions of the film 2 ensure proper Sick course. \

A top view of a further embodiment of the anti-drumming covering sheet according to the invention is shown in FIG . Such a cutout 5 corresponds to an opening in the curved sheet metal part; In the case of a cardan tunnel to be deadened, for example, this is an opening in the upper part of the tunnel through which the gear stick is usually guided. In a preferred embodiment, the edges of the cutout are

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5 additionally reinforced with fabric to make it particularly dimensionally stable to design.

In Figure 5 is shown in a schematic cross section how the detonation covering sheet according to the invention has adapted to a curved base after plasticizing. In this embodiment of the detonation covering sheet shown here the coarse-meshed fabric 1 is on the surface of the film 2, which fused with the base 3 is. This base 3 can be, for example, the sheet metal of a cardan tunnel. The tensile, coarse-meshed fabric 1 has prevented the plasticized film 2 from flowing down on the vertical part of the base 3 or from this Fold down the rope. As a result, the base 3 was flawlessly different from the one according to the invention over its entire surface The anti-drumming membrane was laid and thus anti-drumming.

The one with the multilayer de-drone covering sheet according to the invention The advantages achieved are that now any shaped documents, in particular body panels and cardan tunnel sheets for automobiles in one Paint drying integrated manufacturing process can be deadened. The lamination of the anti-threat covering sheet according to the invention a coarse-meshed, tensile fabric does not and also does not hinder the plasticization of the film the melting of the film on the base, guaranteed

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however, the dimensional stability and stability of the film in the plasticize state.

The unclad side areas of the anti-drumming covering sheet according to the invention ensure that the corrugation runs perfectly in the immediate vicinity of the curved sheet metal part. In addition, cutouts can be made in the laminated central area in the sheet metal part to be deadened be arranged so that in the immediate vicinity of the edge of the opening in the sheet metal part a proper sound deadening can be achieved.

The film can therefore no longer tear open or fall down on vertical body parts and still adapt to any curved surface. In areas where a highly localized adaptation of the anti-drumming covering to a corrugation of the base is necessary _¥ the lamination by the fabric can be omitted.

Claims (9)

Protection claims 1. Multi-layered parts that can be melted onto tunnel-shaped sheet metal parts De-threat covering membrane, characterized in that that a bitumen and / or plastic film (2) and / or a bitumen-plastic mixed film (2) with a coarse-meshed, tensile fabric (1) is laminated * 2. Entdröhnun _o sbelagbahn according to claim 1, characterized in that the laminated fabric (1) in the central area (4) the film is arranged, which is intended to cover in particular the vertical parts of the tunnel. 3. De-threat covering sheet according to claim 1 and / or 2, characterized, that in the middle area (4) cutouts (5) are arranged, up to the vicinity of the vertically sloping parts of the enough tunnel-shaped sheet metal part V and their edges with are reinforced with additional coarse-meshed fabric. 4. Detonation covering sheet according to at least one of claims ^fi 1 to 3, characterized, • ■ I I I ■ ι ι that the film (2) is consolidated at elevated temperature, insoesondere at about 18o C ^0, plastic and at room temperature, and that the coarse-mesh fabric (1) is sovrohl tensile strength at an elevated -temperature and at room temperature. 5- anti-drumming arch according to at least one of the claims 1 to 4-, characterized, that the fabric (1) consists of jute and / or paper and / or a jute paper. 6. anti-drumming covering sheet according to at least one of claims 1 to 5, characterized,
that the fabric (2) is made fire-retardant. 7 · Anti-drumming membrane according to at least one of the / - ^ claims 1 to 6, characterized,
that it is covered with a plastic film. 8. Anti-drumming covering sheet according to at least one of the claims 1 to 7, characterized, that also their edge areas, which are perpendicular to the upper areas falling sheet metal parts are intended, are laminated. > · * · ■ I 1 * I Il I · · i »· ♦ · ■ ■■ _ 5 " 9. Anti-drumming coating »ahn according to at least one of the claims 1 to 8, I. characterized, that individual areas are free of lamination, so that the film (2) adapts to the beading of the base.