Feed roll assembly.

This recently patented leakage-free feed roll assembly is said to help minimize the leakage and scrap created during elastomeric extrusion processes. Known as the ELF (elastomer leakage free) system, the design is said to provide effective feedback of overflow material and can be retrofitted to existing extruders to provide cost savings, according to the company. The feed roll assembly features a shell, feed roll seal plates and feed roll end plates to curtail leakage. The material is redirected back to the feed section by means of a varying bore diameter of the shell and grooves contained in both the feed roll seal plates and the feed roll end plates. All major components are coated with a solid, dry lubricant coating to reduce friction. The result is said to be a cleaner and more efficient elastomeric extrusion process that helps processors save on material and maintenance costs. The system designers are said to have worked collaboratively to make the assembly effective, yet practical. They consulted component suppliers and ran prototype tests until they were able to consistently prove mechanics and manufacturability. (Davis-Standard) www.davis-standard.com