Device and method for sound deadening a component

Abstract

A device for deadening the sound of a component having a damping layer of a foamed material and a stiffening layer, which is fixedly connected to the damping layer and which is stiffer than the damping layer, wherein the damping layer is formed by a foamed hot-melt adhesive.

Claims

1. A device for deadening the sound of a component, comprising: a damping layer of a foamed material and a stiffening layer, which is fixedly connected to the damping layer and which is stiffer than the damping layer, wherein wherein the damping layer is formed by means of a foamed hot-melt adhesive, wherein the damping layer is intended for the direct connection to the component, the sound of which is to be deadened, wherein the foamed hot-melt adhesive can be activated by means of a temperature increase, so that an adhesive surface for fastening the device to the component, the sound of which is to be deadened, is created, and wherein the damping layer includes polyamide and/or butyl rubber and/or polyolefins (TPO) and/or styrene-butadiene block copolymers (SBS) and/or at least 50% by weight of ethylene vinyl acetate (EVA).

2. The device according to claim 1, wherein the damping layer has a larger thickness than the stiffening layer.

3. The device according to claim 1, wherein, together, the damping layer and the stiffening layer form at least 90% of the thickness of the device.

4.-6. (canceled)

7. The device according to claim 1, wherein the stiffening layer has a metal foil and/or a plastic layer and/or cardboard and/or a bitumen layer, comprising an outer cover layer.

8. A composite system having a component, the sound of which is to be deadened and a device according to claim 1, which is fixedly connected to the component, the sound of which is to be deadened.

9. A method for deadening the sound of a component comprising the steps: attaching a device, which has a stiffening layer, and a damping layer of a foamed hot-melt adhesive, which is fixedly connected to the stiffening layer, to the component, the sound of which is to be deadened, wherein the stiffening layer is stiffer than the damping layer; and establishing a fixed connection of the damping layer and the component by heating and subsequently cooling at least the damping layer of the device, wherein the damping layer includes polyamide and/or butyl rubber and/or polyolefins (TPO) and/or styrene-butadiene block copolymers (SBS).

10. (canceled)

11. The device according to claim 3, wherein, together, the damping layer and the stiffening layer form at least 95% of the thickness of the device.

12. The device according to claim 3, wherein, together, the damping layer and the stiffening layer form at least 98% of the thickness of the device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The invention will be described in more detail below by means of exemplary embodiments, which are illustrated in the enclosed, schematic drawings.

[0025] FIG. 1 shows a first embodiment of a device according to the invention, and

[0026] FIG. 2 shows a second embodiment of a device according to the invention.

[0027] The same components or components, which act identically, are identified with the same reference numerals in all of the figures.

DETAILED DESCRIPTION

[0028] FIG. 1 shows a first embodiment of a sound-damping device 10 according to the invention, which can also have a sound-damping effect, in a schematic view in cross section. The device 10 is provided for a fixed, in particular substance-to-substance bond with a component 40, in particular a metal plate, and can also be identified as damping foil, damping plate or damping coating. The device 10 is a composite component and comprises a porous first layer, which is provided with cavities and which is identified as damping layer 20. The damping layer 20 can furthermore also serve as thermally insulating layer. The damping layer 20 consists of a foamed hot-melt adhesive and is equipped to be fixedly connected to the component 40, which is to be improved acoustically or the sound of which is to be deadened, respectively, in particular by means of a substance-to-substance bond. A first outer side 22 of the damping layer 20 is hereby connected to the component 40 in an adhesive manner, in particular by means of a substance-to-substance bond.

[0029] A stiffening layer 30, which is directly connected to the damping layer 20, is arranged on the second side 24 of the damping layer 20 located opposite the component 40. The stiffening layer 30 forms an axially rigid cover of the sandwich plate or of the device 10, respectively, and comprises a first side 32, which is connected to the foamed hot-melt adhesive layer, and a second, outer side 34. The stiffening layer 30 can be a metal layer or an in particular glass fiber reinforced plastic layer, for example. The stiffening layer 30 has a larger surface weight and a smaller thickness than the damping layer 20. The damping layer 20 is elastic, so that it can accommodate vibrations of the component and can convert them into heat, so as to effect a sound deadening of the component 40, wherein the sound deadening effect is further intensified by means of the stiffening layer 30, which is connected to the damping layer 20. As a whole, the component according to the invention is thus a composite component, which has a damping layer 20 and an exterior, stiff cover or stiffening layer 30.

[0030] The device 10 illustrated in FIG. 2 substantially corresponds to the device 10 according to FIG. 1. In contrast thereto, provision is made for a bitumen layer 36 as stiffening layer 30, which is covered with a sealing or cover layer 38. A beadable device for deadening sound for uneven (deformed) grounds is provided in this way, e.g. for white goods or the automobile sector. The bitumen layer 36 can be a bitumen heavy foil.

[0031] Due to the fact that the damping layer 20 is embodied as foamed hot-melt adhesive layer, the latter can be connected or adhered, respectively, to the stiffening layer 30 as well as to the component 40 without additional adhesive layers. An excellent acoustic efficiency is reached simultaneously by means of the elasticity and the formed cavities thereof.