F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
F01N 1/24 (2006.01) D04H 3/07 (2006.01) F01N 1/04 (2006.01) F01N 1/00 (2006.01) F01N 1/02 (2006.01)
Patent
CA 2413724
A multiple layer fiber filled sound absorber (100) and method of manufacturing the absorber are disclosed. The sound absorber includes an outer housing (110), a porous or perforated inner tube or housing (120) defining a passageway (126) through which a gas may flow, and two layers of sound absorbing material, such as fiberglass wool, is positioned between the housings. The sound absorbing material (150) adjacent the inner housing is selected to be more heat resistant than the material (152) farther away from the inner housing. The sound absorber is filled with the sound absorbing materials using a direct fill process in which continuous fibers (212) are injected into the sound absorber. In preparation for filling, a partition (130) is positioned between the housings to define two chambers (140, 142). Each chamber is filled with one of the sound absorbing materials. The partition may then be removed from the sound absorber, or may be left in place (in which case the partition is preferably porous or perforated). The two sound absorbing materials may be filled to different densities. If the partition is removed, the densities will tend to equalize. The direct fill process simplifies and reduces the cost of filling the container and provides a muffler that is uniformly filled and has an improved sound absorbing quality.
Cette invention concerne un silencieux rempli de fibres ~ couches multiples (100) et sont proc~d~ de fabrication. Ce silencieux comprend un bo¹tier ext~rieur (110), un tube ou une bo¹tier int~rieur poreux ou perfor~ (120) d~finissant un passage (126) que peut parcourir un gaz, et deux couches de mat~riau insonorisant, tel que de la laine de verre, dispos~es entre les deux bo¹tiers. Le mat~riau insonorisant (150) adjacent au bo¹tier r~siste mieux ~ la chaleur que le mat~riau (152) ~ l'~cart du bo¹tier int~rieur. Le remplissage du silencieux avec des mat~riaux insonorisants s'effectue directement, par un proc~d~ d'injection de fibres continues (212). Avant remplissage, on dispose entre les bo¹tiers une paroi (130) qui d~finit deux chambres (140, 142). Chacune de ces chambres est remplie avec l'un des mat~riaux insonorisants. La paroi peut ensuite soit Útre retir~e, soit rester en place (auquel cas cette paroi est de pr~f~rence poreuse ou perfor~e). Le remplissage des deux mat~riaux isolants peut se faire selon des densit~s diff~rentes. En cas de retrait de la paroi, les densit~s tendront ~ s'~galiser. Plus simple et moins coÛteux, ce proc~d~ de remplissage rapide permet d'obtenir un silencieux au remplissage plus homogne et au propri~t~s insonorisantes am~lior~es.
Cofer Cameron G.
Knutsson Goran K.
Komori Kunio
Sakai Yukihito
Futaba Industrial Company Ltd.
Owens Corning
Owens-Corning Sweden Ab
Smart & Biggar
LandOfFree
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