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Method for producing a lightweight, sound-insulating covering for motor vehicles and corresponding covering

A lightweight, baffle technology, applied in vehicle components, transportation and packaging, etc., can solve problems such as uneconomical and time-consuming manufacturing, achieve low investment costs, ensure matching, and facilitate material storage.

Inactive Publication Date: 2009-05-13
BAYER MATERIALSCIENCE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The manufacture of this known double cushion is time consuming and uneconomical

Method used

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  • Method for producing a lightweight, sound-insulating covering for motor vehicles and corresponding covering
  • Method for producing a lightweight, sound-insulating covering for motor vehicles and corresponding covering
  • Method for producing a lightweight, sound-insulating covering for motor vehicles and corresponding covering

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Embodiment Construction

[0028] The sound insulation panel according to the invention is preferably the inner front wall panel 1 of the motor vehicle 2 . In principle, however, the panel can also be an acoustic panel of another body part of the motor vehicle, for example as a substructure for a vehicle carpet.

[0029] Such as figure 1 and 2 As shown, the trim 1 matches the contour of the front wall 3 which separates the passenger compartment 4 from the engine compartment 5 . The baffle 1 is self-supporting and light in weight. The total unit area weight of the baffle 1 is preferably less than 900g / m 2 , such as less than 800g / m 2 . The baffle is produced as a foam molded part from a soft foam reaction mixture containing polyol and isocyanate by means of a foam mold in one injection (one-shot process), ie in a single-step process.

[0030] special reference Figure 5 describe the method of manufacture, Figure 5 A multi-part foam mold 9 is shown in . Other accessories such as storage tanks, c...

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Abstract

The method involves producing a lining (1'') as an expanded, sound proof molded part through injection of a reaction mixture containing polyol and isocyanate into a cavity of a foam tool. A predetermined surface area of the foam tool is tempered before or during the injection in such a manner that the molded part has a thickness of 0.5 millimeter and has an open-pored surface (1.2) or a thin sound penetratable membrane (1.4).

Description

technical field [0001] The invention relates to a method for producing a lightweight sound-insulating panel for a motor vehicle body and a corresponding panel, in particular in the form of a front wall panel arranged in a passenger compartment. Background technique [0002] The traditional car front wall baffle consists of a sound-absorbing hard layer and a foam material layer or a textile-like non-woven fabric layer, where the foam material layer or non-woven fabric layer acts as the elastic spring of the acoustic spring-mass system, and the heavy layer acts as the acoustic spring The quality of the quality system. The unit area weight of this type of front wall baffle is usually 2kg / m 2 in the above range. [0003] DE 27 35 153 A1 discloses a particularly lightweight two-layer spring-mass system consisting of open-cell polyurethane soft foam and a covering layer which is particularly suitable as a front panel of a motor vehicle, the covering layer being filled with Comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/04B60R13/08
CPCB29C44/0407B60R13/0815B29C44/04B60R13/08
Inventor D·佐尔陶M·汉森T·格罗斯M·格鲁纳
Owner BAYER MATERIALSCIENCE AG