Abstract: A method of producing a sound-insulating composite component for motor vehicles, in which the composite component includes a heavy layer and a sound-attenuation layer connected with the heavy layer and is made of porous and/or textile material places a certain volume of a heavy-layer material as a plasticized compound into an open cavity of a press including lower and upper dies; closes the press to extrusion-press the plasticized compound into the form of the heavy layer defined by the lower and upper dies; opens the press; arranges the sound attenuation layer in the form of a web, a blank or an injection molded part on the heavy layer; and partially welds together the heavy layer and the sound attenuation layer by closing the press or a further press and by activating several welding elements delimited in area and integrated in the press or in the further press.

Abstract: The invention relates to an acoustically effective heat shield, particularly for motor vehicles, having at least two metal foils, particularly aluminium foils, each of which has a plurality of knob-like embossed points, at least one of the metal foils being perforated. The perforated metal foil has a plurality of holes with an average hole diameter in the range from 0.05 to 0.9 mm. The holes are configured in the metal foil in a density of at least 15 holes per cm2 and the perforated metal foil is provided on one side with an adhesive layer that can be heat-activated above 120° C. and that is correspondingly perforated. The metal foils, which have a thickness in the range from 50 to 200 Am, form a self-supporting composite. In particular, this self-supporting composite may be made up of not more than three adhesive-coated metal foils. In one variant, the self-supporting composite is made from two metal foils and an interposed layer made from a sound-absorbing material.

Abstract: The invention relates to a sound-insulating composite component and a method for its production. The composite component (38) is in particular destined for motor vehicles and comprises a heavy layer (6) and a sound-attenuation layer (17) that is connected with said heavy layer and is made of porous and/or textile material. The heavy layer is formed as a moulded part by extrusion-pressing a plasticized plastic compound, fed-in in the strand placement process, from the group of thermoplastic elastomers, comprises regions of different thickness and/or density and is welded to the sound attenuation layer (17) only in some parts, wherein the sound attenuation layer has a profile structure that is formed by thermal forming, and at least in some sections the circumference of the sound attenuation layer (17) reaches beyond the circumference of the heavy layer (6).

Abstract: The present invention relates to a sound-insulating composite part, particularly for motor vehicles, comprising a heavy layer (7) and at least one layer (8) made of open-pored, elastic absorbing material. Multiple webs (9) are molded onto the heavy layer (7), which are made of the material of the underlay, the underlay material forming the webs (9) being pressed into and/or through the absorber layer (8). The webs (9) divide the absorber layer into multiple absorber areas (11) of different sizes and different thicknesses, which project like cushions in relation to the webs (9). The composite part may preferably be implemented as a floor covering of a motor vehicle, the absorber layer equalizing structure-related height differences, e.g., depressions in underlying vehicle body sheet metal.

Abstract: The invention relates to a sound absorber, in particular for motor vehicles, and to a method for producing the same. It is the object of the invention to provide an acoustically effective component for motor vehicles, which component not only provides a good sound absorbing effect but also good temperature resistance and good ability to recover or right itself after being subjected to compression. To meet this object, a sound absorber is proposed that is made from an open-pore moulded part (7) made from cork particles and a heat-reactive binder, wherein the percentage of binder in the moulded part (7) is at most 1 to 20% by weight. According to the invention the sound absorber is produced in such a way that the cork particles with the heat-reactive binder are placed in a hollow space (4) of a moulding tool designed in the manner of an injection moulding tool. Hardening of the binder is preferably triggered by the binder being subjected to water vapour (20) in the hollow space (4) of the moulding tool (1).

Abstract: The present invention relates to an underbody covering (1?) for motor vehicles, having a support part (2?) attachable to the underbody (12) of the motor vehicle and at least one sound-absorbing part (3) supported thereby. In order, to achieve improved sound insulation, to be able to cover even parts of an exhaust train (13) and/or other parts emitting a high temperature radiation on the bottom of a vehicle floor part (12) using such an underbody covering, it is provided according to the present invention that the sound-absorbing part (3) is at least partially covered on top with a microperforated, heat-shielding layer (14), the microperforated, heat-shielding layer (14) being exposed toward the underbody (12) of the motor vehicle and the sound-absorbing part (3) being made of mineral wool, an open-pored foam, and/or a fibrous nonwoven material.

Abstract: The present invention relates to a method for the shaping of web-like or sheet-like semifinished products (7, 8) made of open-pored plastic using a multipart forming tool (1), whose tool parts (2, 3), which may be moved toward and away from one another, define a cavity (4) having at least one mold structure. The present invention is essentially characterized in that at least one section of web-like or sheet-like semifinished product made of open-pored material is shaped in the cavity of the forming tool (1) by inflating a balloon or hose (18) made of elastic material which is assigned to the cavity (4). In this way, both open-pored thermoplastic materials and open-pored duroplastic materials can be shaped effectively and cost-effectively. In particular, the method according to the present invention allows the manufacture of open-pored shaped parts having undercuts (23, 24). The present invention further relates to a device for carrying out the method according to the present invention.

Abstract: The invention relates to a sound absorber, especially for motor vehicles, comprising a molded part (1) made of thermoplastic material and at least one second part (2) which with the molded part (1) defines a hollow space (7). In order to achieve that such a sound absorber has good media resistance and a high heat resistance with the same or improved acoustic efficiency, it is proposed that a plurality of pin-shaped or spike-shaped spacers (4), which project into the hollow space (7) and are directed towards the second part (2) are formed on the molded part (1), wherein the molded part (1) is provided with a plurality of recesses (6) on the outside which each extend into a spacer (4).

Abstract: A sound absorber (A), especially for motor vehicles, comprising a layer (4) of absorption material, such as open-pored or optionally closed pored foamed material or a wood fiber composite, and a top layer (5) . The aim of the invention is to produce an absorber in such a way that said absorber is easy to produce and assemble and functions well. According to the invention, the top layer (5) for leading through a loom of cables (8) or the like is provided with a tubular recess (40) for leading through a loom of cables. Said recess (4) is provided with groove-like undercuts (42) on the outside.

Abstract: Motor-vehicle door (1) comprising an outer wall (2) and an inner wall (3), a cladding part (4) mounted on the inner wall (3), and an insulation element (5) disposed between the inner wall (3) and the cladding part (4), the insulation element (5) being formed as a foam layer and being clamped in at its edge between the cladding part (4) and the inner wall (3) in a clamping region (K), wherein the insulation element (5) is secured in an adhesive-free manner between the cladding part (4) and the inner wall (3) in the clamping region (K), forming a positively locking profiling.

Abstract: The invention relates to a sound absorber (A), especially for motor vehicles, comprising a layer (4) of absorption material, such as open-pored or optionally closed-pored foamed material or a wood fibre composite, and a top layer (5). The aim of the invention is to produce an absorber in such a way that said absorber is easy to produce and assemble and functions well. According to the invention, the top layer (5) for leading through a loom of cables (8) or the like is provided with a tubular recess (40) for leading through a loom of cables. Said recess (40) is provided with groove-like undercuts (42) on the outside.

Abstract: Motor-vehicle door (1) comprising an outer wall (2) and an inner wall (3), a cladding part (4) mounted on the inner wall (3), and an insulation element (5) disposed between the inner wall (3) and the cladding part (4), the insulation element (5) being formed as a foam layer and being clamped in at its edge between the cladding part (4) and the inner wall (3) in a clamping region (K), wherein the insulation element (5) is secured in an adhesive-free manner between the cladding part (4) and the inner wall (3) in the clamping region (K), forming a positively locking profiling.