Rubber-coating flashboard of flexible-seat gate valve adopting integrative rubber-coating on lead rails and flashboard

The utility model discloses a rubber-coating flashboard of a flexible-seat gate valve adopting the integrative rubber-coating on lead rails and a flashboard. The rubber-coating flashboard comprises a flashboard core of the flexible-seat gate valve; the lead rails are arranged inside lead rail grooves formed on two sides of the flashboard core; outer walls on two sides of each lead rail is in contact with two side walls of each lead rail groove on the flashboard core; gaps between the surface of the flashboard core and the outer bottom surfaces of the lead rails as well as between the bottoms of the lead rail grooves formed on the flashboard core and the outer bottom surfaces of the lead rails are coated with antiseptic rubber layers; and locating devices are arranged on the lead rails. When in rubber-coating, the lead rails are embedded in the lead rail grooves formed on the flashboard core first, and then the lead rails and the flashboard core are processed through vulcanization rubber-coating together. The