Two layer pumpable sound deadener

Details Two layer pumpable sound deadener Two layer pumpable sound deadener

2004-12-21

2008-11-11

Lyjak, Lori L (Department: 3612)

Land vehicles: bodies and tops

Bodies

Structural detail

C296S187010, C296S187030

Reexamination Certificate

active

07448671

ABSTRACT:
A two layer sound deadening material is formed from pumpable material applied through a pair of extrusion heads mounted on a single mount. A robot, used in high speed mass production automotive assembly lines, moves the door panel relative to the stationary extrusion heads to allow the simultaneous application of the two layers onto the interior side of the door. The first layer is formed of a thermosetting composition containing epoxy, rubber and a catalyst and adheres directly to the door panel. The second layer is formed of a thermosetting composition containing an epoxy resin, a thermo plastic copolymer and a curative which will adhere directly to the first layer due to similar chemical structures. The second layer is positioned such that the edges thereof are inside of the corresponding edges of the first layer to prevent read through transmission of noise from the body or door panel.

REFERENCES:
patent: 4308308 (1981-12-01), Sachse
patent: 4734323 (1988-03-01), Sato
patent: 5094318 (1992-03-01), Maeda
patent: 5456513 (1995-10-01), Schmidt
patent: 2002/0170776 (2002-11-01), Bouyonnet
patent: 2005/0050846 (2005-03-01), Surace et al.
patent: 2006/0040096 (2006-02-01), Eadara et al.

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