| 摘要 |
The invention relates to a method for producing a lightweight, sound-insulating covering (1'') for a body part of a motor vehicle, in particular a lightweight front wall covering, and to a covering (1'') of this type. The covering (1'') is produced as a foamed, sound-absorbing moulded part in a single-stage operation by injection of a reaction mixture, which contains polyol and isocyanate, into a cavity of a foaming tool, wherein before and/or during the injection at least one predetermined, cavity-bounding surface region of the foaming tool is temperature-controlled in such a manner that the foamed moulded part has an integral, essentially pore-free skin (1.1) with a thickness of at least 0.5 mm on one side and an open-pore surface (1.2) and/or a thinner, sound-permeable skin (1.4) on its side opposite said skin (1.1). ® KIPO & WIPO 2009
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