Method for producing a sound-dampened automotive enclosure...

Details Method for producing a sound-dampened automotive enclosure... Method for producing a sound-dampened automotive enclosure...

B - Operations, Transporting

21

D

B21D 39/08 (2006.01) B21D 22/20 (2006.01) B32B 15/06 (2006.01) B32B 27/06 (2006.01) B32B 27/42 (2006.01) B65D 90/04 (2006.01) E04B 1/82 (2006.01) F01M 11/00 (2006.01) F02B 77/13 (2006.01) G10K 11/168 (2006.01) B29C 51/14 (2006.01)

Patent

CA 2102708

34 METHOD FOR PRODUCING A SOUND-DAMPENED AUTOMOTIVE ENCLOSURE AND ARTICLE PRODUCED THEREBY ABSTRACT OF THE DISCLOSURE A method for making a sound-dampened automotive enclosure, such as an oil pan, having a metal constraining layer, a metal housing layer, and a viscoelastic layer sandwiched therebetween. In a preferred embodiment, the constraining layer and viscoelastic layer are between the housing layer and the die while the housing layer is being drawn. This results in a very close and snug fit between the layers, leading to enhanced sound-dampening effectiveness. The article thus produced is also disclosed.

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