Process for manufacturing mufflers with polymeric bodies

Abstract

Disclosed is a process for making muffler systems wherein the muffler polymeric bodies have a cross section that is constant over the length of the muffler polymeric body. The muffler systems are inexpensive to make and install.

1 . A process for manufacture of a muffler system, said muffler system comprising, a polymeric muffler body, a metal exhaust pipe, a first body mounting adapter, and a second body mounting adapter, wherein said first body mounting adapter and said second mounting adapter hold said polymeric muffler body a distance from said exhaust pipe so that said polymeric muffler body does not suffer significant thermal damage during operation of said muffler system; comprising:
 melt extruding a polymeric material to provide an extrudate; and   cutting the extrudate to provide a length of a polymeric muffler body having a cross section; said cross section being constant over said polymeric muffler body length;   assembling said polymeric muffler body, metal exhaust pipe, and said first and second body mounting adapter to provide said muffler system.   
     
     
         2 . The process of  claim 1  wherein the extruding provides an extrudate having a cross section that is a portion of the cross section of the polymeric muffler body. 
     
     
         3 . The process of  claim 2  wherein the extrudate cross section provides two halves of the polymeric muffler body cross section. 
     
     
         4 . The process of  claim 1  wherein the polymeric muffler body cross section has a thickness that varies across said cross section.