METHOD OF MAKING SEALING RING WITH RESILIENT CORE

摘要

The invention deals with a method of making endless sealing ring members by forming a sleeve element of a solid high molecular weight copolymer of hexafluoropropylene and tetrafluoroethylene into a loop. The ends are butt-welded to form a smooth toroidal ring. A hole is punched in the side through which entrapped fluid is removed and a liquid silicone rubber composition is injected to form a core. The point of injection is sealed and the core material is solidified.