Rail insulator, also called rail nylon insulator, railroad insulator, is a plastic block installed between steel rails and rail tie plates.
Rail insulator has the same function as rail rubber pads. There are three main functions: 1. Insulation block, which realizes electrical insulation between rail and concrete sleeper. 2. Shock absorption block, which reduce the impact and cutting on the rail and concrete sleeper when the high-speed or high-load train passes. 3. Adjust rail gauge. Railway insulators are important fastening parts and insulating parts for high-speed or high-load trains.