In the pneumatic conveying system that feeds raw rubber granules to the mixing mill, the filter ring seals the inlet of the dust‑removal filter. By holding the filter media firmly in place, it prevents particulate leakage while allowing a steady flow of compressed air that transports the granules. This reliable sealing action keeps the surrounding plant environment clean, reduces wear on downstream rollers, and avoids interruptions caused by filter clogging. When the ring is fitted, operators can run the mixing stage for extended periods without having to stop for filter replacement, which directly supports the high‑throughput demands of tire tread production. The same sealing principle is also applied in the cooling section of the extrusion line, where the ring helps maintain the integrity of the air‑filter that protects the cooling fans from rubber dust. In both locations, the component’s primary contribution is to preserve filtration performance, thereby sustaining continuous material flow and minimizing downtime on the tire‑building line.